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- The first acts of Brazil’s new president: Lula’s new Amazon
institutionality-
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Authors: Machado Vilani; Rodrigo, Ferrante, Lucas, Fearnside, Philip M
Pages: 148 - 151
PubDate: 2023-05-22
DOI: 10.1017/S0376892923000139
- Shifting values and the fate of sacred forests in Guinea-Bissau: are
community-managed forests the answer'-
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Authors: Palmeirim; Ana Filipa, Seck, Sambu, Palma, Luís, Ladle, Richard J
Pages: 152 - 155
PubDate: 2023-07-06
DOI: 10.1017/S0376892923000164
- How science communications can help build societal perceptions of invasive
alien species and their impacts on the environment-
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Authors: Banerjee; Achyut Kumar, Huang, Yelin
Pages: 156 - 162
Abstract: While scientific research highlights the threats of invasive alien species (IAS) to the environment and human livelihoods, another voice is rising that recognizes their beneficial impacts. With evidence increasing of the contrasting impacts of some IAS, the lack of communication between science and society makes decision-making processes more complex. Here, we consider the beneficial aspects of invasive alien plant species and take examples from other life forms to argue that, over time and space, the detrimental impacts of IAS might endanger sustainable livelihoods by increasing invasion debt manyfold. We therefore suggest that future studies reporting the positive impacts of IAS and those encouraging the management of IAS through their utilization should include value judgements that acknowledge the potential risks involved in the practice and the scale and context specificity of such studies. Studies highlighting the negative impacts of IAS should also recognize the context dependency of their findings and emphasize the benefits to be gained from the management of the IAS. We provide a more complete picture of IAS impacts that could help to inform management decisions in the face of different potential choices and the possible impacts of these choices on sustainable livelihoods in the long term.
PubDate: 2023-03-27
DOI: 10.1017/S0376892923000103
- Sacred groves: a model of Zagros forests for carbon sequestration and
climate change mitigation-
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Authors: Moradi; Aioub, Shabanian, Naghi
Pages: 163 - 168
Abstract: Forests are the most important carbon pools among terrestrial ecosystems, and ensuring less disturbance of sacred groves might constitute a form of forest management for carbon sequestration and climate change reduction. The carbon contents in Zagros oak sacred groves and silvopastoral lands were compared to determine the carbon sequestration potential of these forests. Using a nested sampling design, we measured total carbon content (tC ha–1; aboveground tree biomass, aboveground sapling biomass, belowground biomass, soil organic carbon, leaf litter, herbs and grasses and dead wood and fallen stumps) in both forest groves and silvopastoral lands. The mean total biomass and mean total carbon content varied between sacred groves (453.8 t ha–1 and 338.79 tC ha–1, respectively) and silvopastoral lands (89.4 t ha–1 and 113.46 tC ha–1, respectively). Mean soil organic carbon was significantly lower (71.44 tC ha–1) in silvopastoral lands than in sacred groves (125.49 tC ha–1). The mean total sequestered carbon dioxide (CO2) was 1243.36 tCO2 ha–1 in the sacred groves and 416.40 tCO2 ha–1 in silvopastoral lands. We conclude that human activities have reduced the CO2 absorption capacity of the forests. The substantial disparities between the landscapes emphasize the need to restore damaged forests, and sacred groves might be a useful model for increasing carbon storage in these forests.
PubDate: 2023-05-22
DOI: 10.1017/S0376892923000127
- Spatiotemporal evaluation of waning grassland habitats for swamp deer
conservation across the human-dominated upper Gangetic Plains, India-
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Authors: Paul; Shrutarshi, Saha, Sohini, Nigam, Parag, Ali, Sk Zeeshan, Page, Navendu, Khan, Aamer Sohel, Kumar, Mukesh, Habib, Bilal, Mohan, Dhananjai, Pandav, Bivash, Mondol, Samrat
Pages: 169 - 178
Abstract: Grassland habitats currently face severe anthropogenic exploitation, thereby affecting the survival of grassland-dependent biodiversity globally. The biodiversity-rich grasslands of India lack quantitative spatiotemporal information on their status. We evaluated the status of upper Gangetic Plains grasslands in 2015 and compared it with those from 1985, 1995 and 2005. On-ground mapping and visual classifications revealed a 57% decline in these grasslands between 1985 (418 km2) and 2015 (178 km2), mostly driven by habitat conversion (74% contribution by cropland). Limited radiotelemetry data from endemic swamp deer indicated a possible grassland-dominated average home range size of 1.02 km2, and these patches were highly preferred (average Ivlev’s index = 0.85) over other land-use classes at both spatial and temporal scales. Camera-trapping within the core habitats suggests the critical use of these patches as fawning/breeding grounds. Habitat suitability analysis indicates only c. 17% of the area along the Ganges is suitable as swamp deer habitat. We recommend the protection of these critical grassland patches to maintain ‘dynamic corridors’, with restoration and other management approaches involving multiple stakeholders to ensure the survival of this critical ecosystem.
PubDate: 2023-06-22
DOI: 10.1017/S0376892923000140
- Commuters: a waterbird provides a new view of how species may utilize
cities and wildlands-
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Authors: Shlepr; Katherine R, Evans, Betsy A, Gawlik, Dale E
Pages: 179 - 185
Abstract: Traditional classifications of vertebrates’ responses to urbanization fail to capture the behaviour of those that rely on both urban and wildland resources for population persistence. Here, we use the wood stork (Mycteria americana), a species that makes daily foraging trips up to 74 km away from its nest, as an example of a previously unrecognized response to urbanization. We monitored nests and sampled diets at stork colonies in south Florida (USA) during 2014–2020 to investigate how storks use urban habitats. We found that urban development now comprises up to 51.6% of the land cover within the 30-km core foraging area surrounding colonies and that storks access alternative prey types within these urban areas. Our results also showed that urban-nesting storks outperformed wildland-nesting storks when the hydrological condition of the wetlands was suboptimal for foraging. Though storks still require healthy wetlands for population persistence, urban habitat benefitted storks when hydrological patterns were not ideal for prey production in wildlands. This ‘commuter’ response to urbanization, whereby individuals opt to utilize both urban and wildland resources within short time periods, may apply to other vertebrates with large home ranges.
PubDate: 2023-07-06
DOI: 10.1017/S0376892923000152
- Impacts of passive elephant rewilding: assessment of human fatalities in
India-
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Authors: Natarajan; Lakshminarayanan, Nigam, Parag, Pandav, Bivash
Pages: 186 - 191
Abstract: Elephant ranges in Asia overlap with human-use areas, leading to frequent and often negative two-way interactions, a fraction of which result in human fatalities. Minimizing such negative interactions rests on gaining a mechanistic understanding of their patterns and underlying processes. In Chhattisgarh (India), a rewilding population of 250–300 elephants that have recently expanded their range from neighbouring states through dispersal has been causing annual losses of>60 human lives. Using logistic regression models, we examined the influences of eight plausible predictors of the occurrence of elephant-related human fatality incidents. We found that 70% of incidents occurred in areas with high-intensity habitat use by elephants; the other 30% were in areas of intermediate and sporadic elephant habitat use. The probability of human fatalities was high along the roads connecting settlements and in areas with frequent house break-ins by elephants, and this probability was also affected by the spatial geometry of forest patches. Immediate practical options to minimize fatal interactions include community-based early-warning systems and the use of portable barriers around settlements. Judicious landscape-level land-use planning aimed at maintaining the resilience of remnant intact elephant habitats will be critical to preventing the dispersal of elephants into suboptimal habitats, which can create complex conflict situations.
PubDate: 2023-03-31
DOI: 10.1017/S0376892923000115
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