A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

              [Sort alphabetically]   [Restore default list]

  Subjects -> CONSERVATION (Total: 128 journals)
Showing 1 - 37 of 37 Journals sorted by number of followers
Conservation Biology     Hybrid Journal   (Followers: 279)
Biological Conservation     Hybrid Journal   (Followers: 247)
Biodiversity and Conservation     Open Access   (Followers: 195)
Ecological Economics     Hybrid Journal   (Followers: 142)
Ecology and Evolution     Open Access   (Followers: 100)
Global Ecology and Biogeography     Hybrid Journal   (Followers: 65)
Environmental Conservation     Hybrid Journal   (Followers: 63)
Ecology and Society     Open Access   (Followers: 50)
Frontiers in Ecology and Evolution     Open Access   (Followers: 48)
Animal Conservation     Hybrid Journal   (Followers: 48)
Functional Ecology     Hybrid Journal   (Followers: 48)
Restoration Ecology     Hybrid Journal   (Followers: 46)
Aquatic Conservation Marine and Freshwater Ecosystems     Hybrid Journal   (Followers: 44)
Diversity and Distributions     Open Access   (Followers: 43)
Landscape and Urban Planning     Hybrid Journal   (Followers: 36)
Nature Conservation     Open Access   (Followers: 35)
Conservation Science     Open Access   (Followers: 29)
Environmental and Resource Economics     Hybrid Journal   (Followers: 29)
Conservation     Hybrid Journal   (Followers: 28)
Journal for Nature Conservation     Hybrid Journal   (Followers: 27)
Journal of the Institute of Conservation     Hybrid Journal   (Followers: 25)
Conservation Genetics     Hybrid Journal   (Followers: 22)
Ecological Restoration     Full-text available via subscription   (Followers: 22)
Society & Natural Resources: An International Journal     Hybrid Journal   (Followers: 21)
Forest Policy and Economics     Hybrid Journal   (Followers: 21)
Journal of Rural Studies     Hybrid Journal   (Followers: 20)
Oryx     Open Access   (Followers: 20)
Resources, Conservation & Recycling     Hybrid Journal   (Followers: 20)
Journal of Industrial Ecology     Hybrid Journal   (Followers: 18)
Wildlife Research     Hybrid Journal   (Followers: 18)
International Journal of Sustainable Development     Hybrid Journal   (Followers: 17)
African Journal of Ecology     Hybrid Journal   (Followers: 17)
Studies in Conservation     Hybrid Journal   (Followers: 16)
Nature Sustainability     Hybrid Journal   (Followers: 15)
Lakes & Reservoirs Research & Management     Hybrid Journal   (Followers: 14)
Global Ecology and Conservation     Open Access   (Followers: 13)
Journal for the Study of Religion, Nature and Culture     Hybrid Journal   (Followers: 12)
African Journal of Range & Forage Science     Hybrid Journal   (Followers: 12)
Wildfowl     Open Access   (Followers: 11)
Bulletin of the American Museum of Natural History     Open Access   (Followers: 10)
Arid Land Research and Management     Hybrid Journal   (Followers: 10)
Business Strategy and the Environment     Hybrid Journal   (Followers: 10)
Challenges in Sustainability     Open Access   (Followers: 10)
Journal of Natural Resources Policy Research     Hybrid Journal   (Followers: 10)
African Journal of Wildlife Research     Full-text available via subscription   (Followers: 9)
Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society     Open Access   (Followers: 9)
Ideas in Ecology and Evolution     Open Access   (Followers: 9)
Journal of Cultural Heritage Management and Sustainable Development     Hybrid Journal   (Followers: 8)
Earth's Future     Open Access   (Followers: 8)
International Journal of Global Energy Issues     Hybrid Journal   (Followers: 8)
International Journal of Sustainable Development and World Ecology     Hybrid Journal   (Followers: 8)
Journal of East African Natural History     Full-text available via subscription   (Followers: 7)
Natural Resources Forum     Hybrid Journal   (Followers: 7)
Advanced Sustainable Systems     Hybrid Journal   (Followers: 7)
Environmental and Sustainability Indicators     Open Access   (Followers: 7)
Human Dimensions of Wildlife: An International Journal     Hybrid Journal   (Followers: 6)
Natural Resources and Conservation     Open Access   (Followers: 6)
American Journal of Rural Development     Open Access   (Followers: 6)
International Journal of Architectural Heritage: Conservation, Analysis, and Restoration     Hybrid Journal   (Followers: 6)
International Journal of Biodiversity Science and Management     Open Access   (Followers: 6)
Journal of Urban Ecology     Open Access   (Followers: 6)
Environment and Planning E : Nature and Space     Hybrid Journal   (Followers: 5)
Journal of International Wildlife Law & Policy     Hybrid Journal   (Followers: 5)
Journal of Ecology and The Natural Environment     Open Access   (Followers: 5)
Ethnobiology and Conservation     Open Access   (Followers: 4)
Journal of the American Institute for Conservation     Hybrid Journal   (Followers: 4)
International Journal of Social Ecology and Sustainable Development     Full-text available via subscription   (Followers: 4)
Archeomatica     Open Access   (Followers: 4)
Environment Conservation Journal     Open Access   (Followers: 4)
Australasian Plant Conservation: Journal of the Australian Network for Plant Conservation     Full-text available via subscription   (Followers: 4)
AICCM Bulletin     Hybrid Journal   (Followers: 3)
Ecological Psychology     Hybrid Journal   (Followers: 3)
International Journal of Environment and Pollution     Hybrid Journal   (Followers: 3)
Journal of Sustainable Mining     Open Access   (Followers: 3)
Southern Forests : a Journal of Forest Science     Hybrid Journal   (Followers: 3)
Interdisciplinary Environmental Review     Hybrid Journal   (Followers: 3)
Neotropical Biology and Conservation     Open Access   (Followers: 2)
Journal of Paper Conservation     Hybrid Journal   (Followers: 2)
Asian Journal of Sustainability and Social Responsibility     Open Access   (Followers: 2)
Pacific Conservation Biology     Full-text available via subscription   (Followers: 2)
International Soil and Water Conservation Research     Open Access   (Followers: 2)
Sustainable Earth     Open Access   (Followers: 2)
Tanzania Journal of Forestry and Nature Conservation     Full-text available via subscription   (Followers: 2)
Madagascar Conservation & Development     Open Access   (Followers: 2)
Eastern European Countryside     Open Access   (Followers: 2)
Rural Sustainability Research     Open Access   (Followers: 2)
World Review of Entrepreneurship, Management and Sustainable Development     Hybrid Journal   (Followers: 1)
Conservation Science and Practice     Open Access   (Followers: 1)
Journal of Threatened Taxa     Open Access   (Followers: 1)
Rangeland Journal     Hybrid Journal   (Followers: 1)
Resources, Conservation & Recycling : X     Open Access   (Followers: 1)
Forum Journal     Full-text available via subscription   (Followers: 1)
Tropical Conservation Science     Open Access   (Followers: 1)
Conservación Vegetal     Open Access   (Followers: 1)
Park Watch     Full-text available via subscription   (Followers: 1)
Wildlife Australia     Full-text available via subscription   (Followers: 1)
European Countryside     Open Access   (Followers: 1)
In Situ. Revue des patrimoines     Open Access   (Followers: 1)
npj Urban Sustainability     Open Access  
Recursos Rurais     Open Access  
Madera y Bosques     Open Access  
Intervención     Open Access  
Soil Ecology Letters     Hybrid Journal  
Tropical Ecology     Hybrid Journal  
Socio-Ecological Practice Research     Hybrid Journal  
Process Integration and Optimization for Sustainability     Hybrid Journal  
Water Conservation Science and Engineering     Hybrid Journal  
Nepalese Journal of Development and Rural Studies     Open Access  
VITRUVIO : International Journal of Architectural Technology and Sustainability     Open Access  
Sustainable Environment Agricultural Science (SEAS)     Open Access  
Savana Cendana     Open Access  
Arcada : Revista de conservación del patrimonio cultural     Open Access  
Nusantara Bioscience     Open Access  
Indonesian Journal of Conservation     Open Access  
Indonesian Journal of Sustainability Accounting and Management     Open Access  
One Ecosystem     Open Access  
Revista de Direito e Sustentabilidade     Open Access  
Ambiens. Revista Iberoamericana Universitaria en Ambiente, Sociedad y Sustentabilidad     Open Access  
Revista Meio Ambiente e Sustentabilidade     Open Access  
Revista de Ciencias Ambientales     Open Access  
Recycling     Open Access  
Revista Memorare     Open Access  
Novos Cadernos NAEA     Open Access  
Julius-Kühn-Archiv     Open Access  
Future Anterior     Full-text available via subscription  
Regional Sustainability     Open Access  
Interações (Campo Grande)     Open Access  

              [Sort alphabetically]   [Restore default list]

Similar Journals
Journal Cover
Tropical Ecology
Number of Followers: 0  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 0564-3295 - ISSN (Online) 2661-8982
Published by Springer-Verlag Homepage  [2467 journals]
  • Effect of variation in winter rainfall and anthropogenic disturbances on
           regeneration of trees in (Van-Panchayt) community forests Uttarakhand,
           India

    • Free pre-print version: Loading...

      Abstract: Abstract For this study, we surveyed forest community forest (Van-Panchayat and Soyam forest) area of 98 villages in six districts of Uttarakhand for assessing the extent of anthropogenic disturbances and repeated forest fires on community forest and Soyam forest. To assess anthropogenic disturbances in community forest 490 quadrates were laid, in 80.8% of sample plots, there were heavy grazing/browsing signs in 65.91% of plots we observed signs of fuelwood collection. In 15.3% of sample plots, we found signs of forest fire and these were low altitude Pinus roxburgii (Pine Tree) dominating forest. Out of thirty-two (N = 32) tree species, only twelve (N = 12) species were having seedlings. The seedling population was only 19% of the total sample size. It was found that about 99% of the trees were having lopping of canopy and cutting of branches for fodder and fuelwood. Data on the wood consumption rate at the household level were also analyzed by categorizing the village’s altitude wise. All villages were categorized into three categories based on their altitudes (I) 1000–2000 m, (II) 2001–2300 m, (III) 2300–3200 m. We also analyzed the winter rainfall data of Uttarakhand for 114 years (1901–2015) to observe the reduction in winter precipitation. The total cumulative rainfall of winter months averages for the period 1966–2015 was 31.73% less than the period 1901–1951. Reduction in (31–70.9 mm) rainfall category is about 85% of total rainfall was as in (≥ 70.9–90.9 mm) the rainfall has increased slightly or remained unchanged which is 19.23% of total cumulative rainfall of winter months averages. Maximum reduction in rainfall was observed in 51.0–60.9 mm range (1660 mm) followed by > 121 mm range (− 922 mm), 31–40.9 mm range (− 749 mm), and 41–50.9 mm range (− 655.4 mm) in winter months starting from November to March-end.
      PubDate: 2022-12-01
       
  • Diversity of root-associated mycobiome of Betula utilis D. Don: a treeline
           species in Kashmir Himalaya

    • Free pre-print version: Loading...

      Abstract: Abstract Treelines and treeline species are being studied the world over because of their sensitivity to climate change but most of these studies have not focused on the essential belowground mutualists which could influence the outcome of the interaction between treeline species and climate change, such as the treeline shift. To fill this knowledge gap, we processed 27 root samples of Betula utilis from two sites in the Kashmir Himalaya and identified 590 species of root-associated fungi belonging to 158 genera, 80 families, 38 orders, 15 classes and 3 phyla from a total of 9157 quality reads. Most of the identified species belonged to Basidiomycetes. Papiliotrema, Humaria, Sphaerobolus, Sebicina, Inocybe, Cryptococcus, Lactarius and Laccaria were the dominant taxa. Symbiotroph, Saproptroph-Symbiotroph and Saprotrophs were the dominant trophic modes of the identified root-associated fungi and most of the identified species belonged to the Ectomycorrhizae (ECM) guild. Differences in the species richness between the two sites were noted and a total of 511 taxa were recovered from root samples at the Sinthan Top site in south Kashmir whereas only 302 taxa were recovered from root samples at the Apharwat site in north Kashmir. Papiliotrema and Inocybe with > 75% prevalence represented the core microbiome. Our study provides the first detailed and comprehensive account of the diversity of fungi associated with the roots of B. utilis and paves way for exploring their functional role in the growth of this treeline species, particularly under changing climate.
      PubDate: 2022-12-01
       
  • Modeling future habitats to identify suitable sites for ex situ
           conservation of the endangered palm Metroxylon vitiense (H. Wendl.) H.
           Wendl. ex Benth. & Hook. f. in Fiji

    • Free pre-print version: Loading...

      Abstract: Abstract Climate change and human-centered development have endangered the survival of many species. The purpose of this study was to investigate, using MaxEnt, changes in the habitat suitable for the endangered palm Metroxylon vitiense (H. Wendl.) H. Wendl. ex Benth. & Hook. f. in Fiji resulting from a changed climate. MaxEnt is a maximum entropy-based machine learning program, and it can estimate the probability distribution for the occurrence of a species based on environmental constraints. The results indicated that precipitation in the driest month had the highest gain when it was considered in isolation, indicating that this factor is the most important environmental variable influencing the distribution of this palm. Moreover, precipitation in the driest quarter and annual precipitation may influence to some extent the distribution of the species. Predictions indicated that future suitable habitats for M. vitiense may occur not only in the coastal area, but also away from it. Although this prediction has associated uncertainty, the suitable area may increase to 409.7% and 240.9% of the area of current suitable habitats. The coastal area, where the current habitat it located, is subject to rapid development and may be affected by sea-level rise. In this case, ex situ conservation would be effective. In order to avoid risk, this study suggests that it would be appropriate to plant M. vitiense away from coastal areas. However, ensuring there is sufficient area for transplantation is a major issue.
      PubDate: 2022-12-01
       
  • Species diversity of Rhododendron shrub communities and utilization of
           Rhododendron resources in urban green spaces of Nanjing

    • Free pre-print version: Loading...

      Abstract: Abstract As a traditional ornamental flower, rhododendrons are increasingly used in landscaping and urban greening. In this study, we surveyed 49 urban green areas and 134 sample sites in Nanjing, China, according to the functional type and administrative area of each green area using typical sampling and quadrat methods. We calculated the Rhododendron shrub community quantitative characteristics index and community diversity index to evaluate the species diversity of each Rhododendron shrub community. Additionally, the indicators of rhododendron planting in each sample site were counted to understand the characteristics of the application of rhododendrons in Nanjing’s urban green space and to identify the problems. According to the Simpson index and Shannon–Wiener index of the Rhododendron shrub community, road green space and Xuanwu District have relatively higher species diversity, while the Pielou index indicates that road green space and Jianye District have relatively higher species evenness. A total of 11 Rhododendron cultivars were found in this survey, among which R. simsii ‘ZiHuDie’ was the most widely used cultivar in Nanjing urban greenery; however, this result shows that the applied Rhododendron cultivars are too homogeneous. This study highlights problems affecting Nanjing urban greening and can be used as a reference for future Rhododendron breeding research.
      PubDate: 2022-12-01
       
  • Surface water distribution challenges and elephant impacts on woody
           species in Mana Pools National Park, Zimbabwe

    • Free pre-print version: Loading...

      Abstract: Abstract This study assessed the relationship between surface water distribution and elephant impacts on the Zambezi River flood plain, Mana Pools National Park woody species ecosystem. Water availability and forage are major requirements for African elephant distribution within an ecosystem landscape in Zimbabwe. Surface water unavailability reduce elephant home range to around peripheries of water bodies and this is intensifying the destruction of wood species around these water bodies. The study adopted a mixed methods research design which combined qualitative and quantitative methods. Field data were collected between 10 January 2017 and 14 February 2019. Questionnaires, interviews and field observations were the major tools used to collect data in Mana Pools National Park. Data were analysed using the Statistical Package for Social Sciences version 20.0. Inferential statistics were employed to determine the relationship between elephant activity and damage of woody species. Chi square test results revealed that there is a significant relationship (P < 0.05; P = 0.001) between elephant activity and woody species damage. This means that woody species damage in the Mana Pools National Park Zambezi Valley flood plain can be attributed to elephant activity. This study recommends that Government and Zimbabwe Parks and Wildlife Management Authourity (ZPWMA) should formulate effective elephant population analysis through periodic surveys in order to continuously update the national data base of elephant population trends in areas such as Mana Pools National Park.
      PubDate: 2022-12-01
       
  • Predicting potential distribution of Emmenopterys henryi in Southwest
           China based on the Maxent model and influencing factors

    • Free pre-print version: Loading...

      Abstract: Abstract Emmenopterys henryi Oliv. is the only known extant species of its genus. It is an endangered and therefore protected plant endemic to China. Currently, most existing research focuses on Central and Eastern China, and a study on potential suitable distribution area of E. henryi in Southwest China is necessary. In this paper, the maximum entropy model and geographic information system were used to predict and analyze the spatial and temporal distribution of E. henryi in Southwest China throughout four periods. The results of the study showed that the moderately and highly suitable areas of E. henryi were mostly distributed in the south of Sichuan, the northeast of Yunnan, the north and southeast of Chongqing, scattered in Guizhou province, with a few low suitability areas in the southeast of Tibet. The total suitable area is about 3.52 × 105 km2, accounting for 15.06% of the total area of Southwest China. The receiver-operating characteristic curves showed that the dominant ecological impact factors of the present distribution are as follows: precipitation in the driest month, elevation, solar radiation, topsoil clay fraction in January, topsoil gravel content, and topsoil base saturation. Their cumulative contribution rate reached 82.7%, and the threshold value of the dominant factors were analyzed according to the factor response curve. Integrated with the prediction results of historical and future periods, it is found that only consider climate change, the suitable area of E. henryi will increase in Southwest China. The total precipitation in the driest month, elevation and isothermality are main factors influencing the change in suitable area in future period.
      PubDate: 2022-12-01
       
  • Satellite-based estimates of photosynthetically active radiation for
           tropical ecosystems in Ghana—West Africa

    • Free pre-print version: Loading...

      Abstract: Abstract Photosynthetically active radiation (PAR; 0.40–0.70 μm) is a key driver in ecosystem biochemical processes, and thus a critical factor in agriculture productivity, ecosystem-atmosphere energy, and CO2 fluxes. There is however a dearth of PAR measurements in many regions. Therefore, this paper proposed to estimate and analyze the spatiotemporal distribution characteristics of PAR on zonal and seasonal scales at 22 sites representing four different tropical ecosystems (savannah, transition, forest, and coastal) in Ghana, using long-term sunshine duration measurements and satellite-based climatological reanalysis datasets spanning 1981–2010. It is shown that a generalized factor of 0.45, which varies between 0.40 and 0.60 annually, estimated PAR to a good approximation for all selected sites, with indices of agreement between 0.94 and 0.99. The satellite and estimated PAR have a mean low of 7.90 ± 0.50 and 7.37 ± 0.70 MJm−2 day−1 during the June–July–August season respectively, and a mean high of 8.90 ± 0.43 and 9.10 ± 0.40 MJm−2 day−1 during the March–April–May season respectively, largely associated with seasonal atmospheric conditions owing to dust and water vapor. The mean residual error in PAR estimation is 0.01 ± 0.36 with the most seasonal variations in the dry and wet seasons. The study provides theoretical and practical insights for forest management and ecosystem preservation over the sub-region.
      PubDate: 2022-12-01
       
  • Invasion and distribution of exotic plants in the tropical forests of
           Western Ghats, India

    • Free pre-print version: Loading...

      Abstract: Abstract Invasion of exotics in the tropical forests of Western Ghats is a serious concern for forest managers and conservationists. Present study aims to evaluate the diversity of exotics and native understory species occupying different forest types in relation to tree density in an area typical to the region. Stratified random sampling was used to analyze the diversity of both tree and understory flora of different vegetation types (different tropical forest types including subtypes like grasslands and savannahs and also teak plantations). One-way ANOVA and Spearman correlation was used to test the relationship between exotics, native understory species and trees. Results showed that diversity of exotic species is negatively correlated with the density of trees. Also, occurrence and distribution of exotics varied with proximity to human habitations. Rarefaction curve of understory flora (include both exotics and native understory species) in different vegetation types showed that floristic diversity was higher in disturbed and tree-scarce vegetation types as compared to undisturbed and tree-dense vegetation types.
      PubDate: 2022-12-01
       
  • Assessment of livestock grazing pressure in key tiger habitat in a
           semi-arid landscape in Western India

    • Free pre-print version: Loading...

      Abstract: Abstract Loss of pasture lands and increased livestock population has resulted in higher livestock dependency on the forest lands. Kailadevi Wildlife Sanctuary (KWLS) is an important landscape for maintaining a healthy tiger population in western India. The sanctuary is inhibited by 19,179 people and 78,122 livestock in 66 settlements. Livestock density in KWLS is 0.74 ACU ha−1 which is much higher than the recommended stocking density. Heavy livestock population has degraded the habitat. The study was carried out to assess the grazing pressure in the KWLS. Livestock population has left very little space for the wild herbivores. There is an immense possibility of increased human–wildlife conflicts and endangered food security and livelihood for thousands of people. In view of such a situation, measures have been suggested for the management of livestock grazing impacts and conservation of this crucial habitat.
      PubDate: 2022-12-01
       
  • Evaluation model of ecological economic benefits based on discrete
           mathematical algorithm

    • Free pre-print version: Loading...

      Abstract: Abstract In this this paper, an evaluation index system was constructed to standardize the evaluation index of ecological economic benefit considering the principles of scientific, concise, systematic, dynamic, consistent, and calculable. According to the objective and fuzzy practical judgment of the evaluation object, the hierarchy structure of the index system was constructed. Principal component analysis was used to calculate the weight value of the first-level index. Analytic hierarchy process (AHP) was incorporated to calculate the weight value of the second-level index. The nonlinear coupling was qualitatively analyzed between social economic benefits and ecological environmental benefits using Lyapunov first-party method. The influence coefficient of each subsystem was introduced into each subsystem by discrete data algorithm to evaluate the ecological economic benefit, and the ecological economic benefit evaluation model based on discrete mathematical algorithm was constructed. The experimental results showed that the cost evaluation results based on the benefit evaluation model designed in this paper have a slight error, and the ecological economic benefit evaluation results have high accuracy.
      PubDate: 2022-12-01
       
  • Heavy metals in karst tea garden soils under different ecological
           environments in southwestern China

    • Free pre-print version: Loading...

      Abstract: Abstract Tea plantations are the main source of economic income in karst areas, and the quality of the soil environment is an important factor related to tea quality. In this study, the objective was to assess the concentration and spatial distribution of Hg, As, Pb, and Cr in tea garden soils under different ecological environments. The results showed that there were some significant differences among the heavy metals in different ecological environments, and significant positive correlations existed among Hg, Pb, and Cr in the soils from the same environment. The Cr, Pb, and Hg contents were positively correlated with soil organic matter, available potassium, total phosphorus, total potassium and total nitrogen, while As was positively correlated with pH, available nitrogen, and available phosphorus. The contents of the four studied heavy metals in the karst tea garden soils in Guizhou were relatively low, meeting the soil environmental quality standard criteria for pollution-free tea gardens. In conclusion, both the heavy metal-specific and comprehensive pollution indices are less than 1.0. These data suggest that the soil quality in the tea plantation areas in Guizhou is good regarding the studied heavy metals.
      PubDate: 2022-12-01
       
  • Soil CO2 efflux variability influenced by different factors in the
           subtropical sacred groves of Manipur, North-East India

    • Free pre-print version: Loading...

      Abstract: Abstract The influencing factors on the carbon dynamics of low latitude regions remain unclear in the global carbon budgets. Studies on the carbon budget of sacred groves of north east India as well as influencing factors on rate of carbon dioxide efflux are scanty. This study explores the spatial and temporal seasonality trend in the rate of soil CO2 efflux in relation to biotic and abiotic factors in subtropical sacred groves of Manipur. An automatic chamber system was used in measurement process in six selected sacred groves over two consecutive years. In the present study, soil CO2 efflux rates showed a positive exponential correlation with soil temperature, soil moisture and root biomass, having greater sensitivity to soil temperature. The rate of soil CO2 efflux showed strong positive correlation to seasonal soil organic carbon content indicating greater role in mineralization with higher carbon dioxide emission. Litter biomass showed negative correlation with soil CO2 efflux depicts trade-off carbon budget. This indicates the sensibility of soil CO2 efflux with soil temperature surpassing the influence of soil moisture and other biotic factors. It suggests that the persisting carbon sink will be weakening with the increase in temperature, giving the feedback mechanism regarding carbon cycle under global warming scenario in the subtropical region.
      PubDate: 2022-12-01
       
  • Fish assemblage pattern, seasonality and their interaction with
           environmental variables: insights from canals of Sundarbans, India

    • Free pre-print version: Loading...

      Abstract: Abstract In the present study, the fish distribution and assemblage pattern in relation to environmental variables were studied in the canals of Indian Sundarbans. The Permutational analysis of variance (PERMANOVA) depicted the significant variation of water variables between the seasons (F = 10.40; p = 0.001), and stations (F = 1.96; p = 0.011). A total of 44 species belonging to 39 genera, 30 families and 16 orders were recorded with Cyprinidae (6 species) as the apex contributor. Significant temporal variations of fish Species Richness per sample (SRp) (p ≤ 0.05) were observed between pre-monsoon and monsoon season. By and large, fish assemblages did not portray the significant seasonal variation hinted towards the limited connectivity with tidal water through the sluice gate, thereby minimizing the movement of fish species between the canal and river. The fish assemblages pattern exhibited an overall 30% similarity among all the stations. The calculated value of Margalef richness (dʹ) and Shannon diversity (Hʹ) indices (4.42 ± 0.84 and 2.62 ± 0.18 for dʹ and Hʹ, respectively) indicating a moderate fish diversity in the canal system. The water variables such as temperature, dissolved oxygen, pH, salinity, specific conductivity, transparency, depth and water flow play important role in structuring the fish assemblages in the studied canals which were evident from the BIO-ENV module, and the distance-based redundancy analysis (db-RDA). Meagre seasonal variation of fish populations related to variations in species-specific adaptation to the prevalent ecological conditions.
      PubDate: 2022-12-01
       
  • Identifying the potential global distribution and conservation areas for
           Terminalia chebula, an important medicinal tree species under changing
           climate scenario

    • Free pre-print version: Loading...

      Abstract: Abstract Terminalia chebula Retz. (Combretaceae), commonly-known as chebulic myrobalan is one of the important Non-Timber Forest Product (NTFP) species which is harvested for its fruits and galls. The species known as the “King of medicines” is used widely in Ayurveda, Sidda, Unani, and traditional Chinese medicines for curing a wide variety of diseases in Asia and Africa. Terminalia chebula is an important ingredient of Triphala (Ayurvedic medicine) along with Terminalia bellirica and Phyllanthus emblica. The fruits of the tree also yields a dye which is used as an organic dye in the textile industries. In recent years, there is an increasing demand for herbal remedies and organic dyes, resulting in extensive extraction of fruits and galls from T. chebula. In this study, the major objective was to identify sites for the conservation of T. chebula and to identify important environmental variables determining its distribution. Based on the existing species distribution records (primary and secondary), along with a suite of climatic variables, the present and future distribution of the species were predicted. The study identified ecological niches that are suitable for the cultivation of the species; the species occurs in India, Pakistan, Sri Lanka, Cambodia, Myanmar, Vietnam, China, Laos, Thailand, Bhutan, Taiwan, Nepal and Bangladesh under the current climatic scenario. Within India, our results suggest that the central and south India are highly suitable in the current scenario. The mean annual temperature, temperature seasonality and isothermality seem to be the most important variables determining the distribution of the species which is directly influenced by climate change. Overall, the study indicated that under the future climate change scenarios the distribution of T. chebula is likely to decrease. The results indicate that T. chebula is highly vulnerable to climate change. Considering the economic importance of the species, it is important to understand how the species distribution will alter in the wake of climate change to develop effective conservation strategies. The study also provides important environment variables that determine the species distribution which could aid in identifying areas where the species could be cultivated.
      PubDate: 2022-12-01
       
  • Habitat fragmentation effects on vascular epiphytes diversity in Kafa
           biosphere reserve and nearby coffee agroecosystem, southwestern Ethiopia

    • Free pre-print version: Loading...

      Abstract: Abstract Epiphytes colonize canopy trees, provide substantial ecosystem services in production and nutrient cycling, contribute as energy sources, shelter and breeding sites for pollinating birds, bats and ants. Despite this, information on their diversity is patchy. Therefore, this study was investigated vascular epiphytes diversity in Kafa biosphere reserve and nearby coffee agroecosystem. Seventy-two matured trees were systematically selected and assessed for standardized, rapid and representative assessment of vascular epiphytes. 10 × 10 m plots were established at each selected tree understory and each tree was climbed using single rope technique. Characteristics of the phorophytes such as tree height, diameter at breast height, bark rugosity, tree vertical zones and crown architecture were measured. Statistical analyses mainly generalized linear mixed model, canonical analysis and Principal component analysis in R program were used for data analysis. A total of 63 species belonging to 24 genera and 13 families were recorded. Orchidaceae was the dominant family followed by Piperaceae, Polypodiaceae and Lycopodiaceae in terms of species richness and frequency, whereas families such as Adiantaceae, Oleandraceae and Vittariaceae were poorly represented. Species richness and frequency of Vascular epiphytes were significantly lower (P = 0.003) on remnant trees as compared with forest trees. We postulate that changes in microclimate resulting from habitat fragmentation can cause significant reduction in these canopy dwelling and structurally dependent organisms. Conservation of forests with large but slow growing old trees was crucial to maintain habitat specialist vascular epiphytes.
      PubDate: 2022-12-01
       
  • Spatial grain size effects of landscape metrics in different gradients of
           coastal areas

    • Free pre-print version: Loading...

      Abstract: Abstract As an essential object of regional development and utilization, the coastal area was affected by the increasing human activities, resulting in a profound impact on the coastal landscape. However, how landscape metrics respond to increasing spatial grain size in coastal areas remains unclear. Therefore, four gradients are divided according to the distance from the coastline, and 16 landscape metrics are introduced in this study. The spatial grain size effects of multiple landscape metrics in different gradients of coastal areas were analyzed using the methods of change trend analysis, variation coefficient, and Fragstats model. It was revealed that apart from the diversity metrics, the responses of the density metrics, area and edge metrics, shape metrics, and distribution metrics to increasing grain size were highlighted in coastal areas. There were significant differences in spatial grain size effects of landscape metrics in different gradients of coastal areas. The sensitivity of most landscape metrics to increasing grain size in gradient I the (region near the coastline) was evidently higher than that of other gradients (regions far away from the coastline). Furthermore, the composition, proportion, and distribution of landscapes in different gradients of coastal areas under the influence of human activities are crucial factors influencing the grain size effects of landscape metrics.
      PubDate: 2022-11-23
       
  • Understory floristic diversity and soil seed bank status of planted and
           unplanted portions of South Busoga Forest Reserve, Eastern Uganda

    • Free pre-print version: Loading...

      Abstract: Abstract South Busoga Central Forest Reserve, an isolated reserve in Uganda has been degraded for over forty years. To restore the reserve, the National Forestry Authority established plantations in some parts of the reserve and plans to reserve 40% under native vegetation. Until now, no study exists to inform management of the availability of native species in the degraded area to support natural forest regeneration. The objectives of this study were to: (i) establish if there are seeds of native forest species in the soil seed bank of plantations and unplanted areas (ii) assess the potential of the understory of plantations to serve as ‘seed sources’. A seed bank assay of soils from plantations; Eucalyptus grandis, Maesopsis eminii and Pinus caribaea and unplanted areas was performed. Understory vegetation was sampled in 125 subplots of 5 × 5 m, randomly distributed in the plantations. In the seed bank, we recorded a total of 56 species in plantations and 22 in unplanted. There were more species in soils under E. grandis (12) > M. eminii (10) > P. caribaea (9) > unplanted area (3). Apart from Ficus sp. and Drypetes sp. that are woody, the rest of the species were non-woody. In the understory, we encountered a total of 56 species but only fifteen were native tree species with occurrence of less than five individuals each. These results show that sustained forest degradation depletes soil seed banks of native forest species and that plantations of exotic species can also nurse native species in their understory.
      PubDate: 2022-11-17
       
  • Optimal distance to escape terrain of bharal in presence of livestock in
           Greater Himalayan alpine rangelands

    • Free pre-print version: Loading...

      Abstract: Abstract Escape terrain is an integral component in species ecology for survival and predation avoidance, alongside other factors. For mountain ungulates, escape terrains are steep cliffs serving as refuge in case of predation or other disturbances. Mountain ungulates can exploit their habitat safely within certain distance from these escape terrains. This distance to escape terrain depends on topography, availability/distribution of nutritious forage and nature and extent of interspecific interactions in different montane habitats. Alpine pastures of the Greater Himalaya are shared by mountain ungulates as well as pastoralists who migrate to graze their livestock in summer-monsoon season. In such habitats, nutritious grasses are often distributed in patches, far away from cliffs. In presence of livestock, mountain ungulates have to tradeoff between food acquisition and avoiding predation, competition and disturbance by maintaining an optimal distance between their escape terrain and available forage. In this regard, we estimated optimal distance to escape terrain which bharal (Pseudois nayaur) maintains in alpine areas of Greater Himalaya. Spatial analysis was carried out with observation data and considering slopes above 45 degrees as cliffs, providing appropriate cover in our study area. The results revealed bharal maintained optimal distance till 795.2 m from cliffs during livestock presence. This contrasts with Trans Himalayan habitat where bharal tend to remain closer to cliffs as nutritional forage is more evenly distributed here compared to cis-Himalayas. Such crucial information on topographic factors affecting bharal ecology with respect to livestock can help in strategizing management decision and species monitoring in Greater Himalayan landscapes.
      PubDate: 2022-11-15
       
  • Impact of cropping systems on pedogenic distribution and transformations
           of micronutrients, plant accumulation and microbial community composition
           in soils: a review

    • Free pre-print version: Loading...

      Abstract: Abstract Different types of agricultural cropping systems involving wheat coupled with rice, maize and cotton are adapted by most of the farmers around the world. In order to increase the production of food grains with the adaptation of these cropping systems, intensive cultivation is required which eventually needs more quantity of macro as well as micronutrients. The availability of micronutrients to plants is majorly affected by cropping patterns and their profile distribution and the chemical pools. For instance, rice–wheat (R-W) cropping system depletes the available micronutrients status in soil. Many crops have a deep root system that allows them to fulfill their micronutrients requirement from deeper soil layers. In pedon, the surface layer of soil is richer in micronutrients than sub-surface soils. Thus, the knowledge of all the forms or fractions of micronutrient in soil and conditions that help in converting them to their available forms is essential. Excessive use of macronutrient fertilizers in soil with alkaline pH, results in an upsurge accumulation of micronutrients under R-W system. Consequently, it is essential to understand the relationship between accumulation of micronutrients by plants and different chemical pools of micronutrients and their distribution in the pedon. Also, the incorporation of different crops in various cropping systems has a marked influence on microbial communities in soil which play a crucial role in nutrient cycling, gaseous exchanges, aggregation and soil biochemical processes that ultimately influences crop productivity and soil health. Thus, imaging the extent of micronutrient availability to plants, various fractions of micronutrients and microbial community in soil under different cropping systems is necessary.
      PubDate: 2022-11-02
       
  • A non-destructive approach to develop tree-level allometric equations for
           

    • Free pre-print version: Loading...

      Abstract: Abstract Forest tree biomass estimation is a significant issue for the forest management system and to mitigate climate change. Aboveground biomass (AGB) is an indicator of the potential productivity of the ecosystem. However, an accurate estimation method of carbon stock is important for perfect carbon accounting. So, selecting a more appropriate method for biomass assessment is crucial to reaching the goal. Though allometric equations have been used to estimate AGB for both individual species as well as multiple species for regional and pan-tropical scales, species-specific models for a smaller area produce better accuracy. The current initiative has been taken to develop individual tree-level species-specific and generalized local allometric models in a non-destructive manner for the Tripura state of Northeast India, which was the main limitation of carbon stock estimation in the region. Five different forms of log-transformed linearized power equations were tested in the regression models, with AGB as the response variable. The best fit models were chosen based on adjusted R2, F-statistic, Akaike information criterion, Breusch-Pagan test, Variance Inflation Factor, and three assumptions of linearity. A paired t test was conducted between the predicted and observed AGB values. The best fit generalized equation developed in this study was found to be AGB = 1.03 × exp (− 3.95 + 1.09 ln D2 + 0.97 ln H − 0.20 N). Compared with some existing pan-tropical and regional models for their predictive accuracy, this equation expressed the highest R2 value of 0.9089 in an independent testing dataset. When measuring the tree height is difficult due to a closed canopy, the equation AGB = 1.07 × exp (− 2.77 + 2.55 ln D) can be applied to obtain a quick estimation using just the DBH. The equations presented here may be the instrument for estimating carbon stock at the local level.
      PubDate: 2022-10-26
       
 
JournalTOCs
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
Email: journaltocs@hw.ac.uk
Tel: +00 44 (0)131 4513762
 


Your IP address: 3.238.72.180
 
Home (Search)
API
About JournalTOCs
News (blog, publications)
JournalTOCs on Twitter   JournalTOCs on Facebook

JournalTOCs © 2009-