Subjects -> BIOLOGY (Total: 3174 journals)
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BIOLOGY (1491 journals)            First | 1 2 3 4 5 6 7 8 | Last

Showing 201 - 400 of 1720 Journals sorted alphabetically
Biological Research     Open Access   (Followers: 1)
Biological Rhythm Research     Hybrid Journal   (Followers: 1)
Biological Theory     Hybrid Journal   (Followers: 3)
Biological Trace Element Research     Hybrid Journal  
Biologicals     Full-text available via subscription   (Followers: 7)
Biologics: Targets & Therapy     Open Access   (Followers: 1)
Biologie Aujourd'hui     Full-text available via subscription  
Biologie in Unserer Zeit (Biuz)     Hybrid Journal   (Followers: 36)
Biologija     Open Access  
Biology     Open Access   (Followers: 3)
Biology and Philosophy     Hybrid Journal   (Followers: 18)
Biology Bulletin     Hybrid Journal   (Followers: 1)
Biology Bulletin Reviews     Hybrid Journal  
Biology Direct     Open Access   (Followers: 9)
Biology Letters     Full-text available via subscription   (Followers: 44)
Biology Methods and Protocols     Open Access  
Biology of Sex Differences     Open Access   (Followers: 1)
Biology of the Cell     Full-text available via subscription   (Followers: 9)
Biology Open     Open Access  
Biology, Medicine, & Natural Product Chemistry     Open Access   (Followers: 2)
Bioma : Jurnal Ilmiah Biologi     Open Access  
Biomacromolecules     Hybrid Journal   (Followers: 23)
Biomarker Insights     Open Access   (Followers: 2)
Biomarkers     Hybrid Journal   (Followers: 4)
Biomass and Bioenergy     Partially Free   (Followers: 8)
Biomaterials     Hybrid Journal   (Followers: 55)
Biomaterials Advances     Full-text available via subscription   (Followers: 19)
Biomath     Open Access  
Biomatter     Open Access  
Biomechanics and Modeling in Mechanobiology     Hybrid Journal   (Followers: 8)
Biomedical Chromatography     Hybrid Journal   (Followers: 6)
Biomedical Engineering     Hybrid Journal   (Followers: 11)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 11)
BioMedical Engineering OnLine     Open Access   (Followers: 4)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 4)
Biomedical Journal     Open Access   (Followers: 5)
Biomedical Science and Engineering     Open Access   (Followers: 5)
Biomedical Signal Processing and Control     Hybrid Journal   (Followers: 9)
BioMetals     Hybrid Journal   (Followers: 1)
Biometrical Letters     Open Access  
Biometrics     Hybrid Journal   (Followers: 51)
Biometrika     Hybrid Journal   (Followers: 21)
Biomimetic Intelligence and Robotics     Open Access  
Biomolecular NMR Assignments     Hybrid Journal   (Followers: 3)
Biomolecules     Open Access   (Followers: 1)
BioNanoScience     Partially Free   (Followers: 3)
Bionature     Open Access   (Followers: 1)
Biopreservation and Biobanking     Hybrid Journal   (Followers: 2)
Bioprocess and Biosystems Engineering     Hybrid Journal   (Followers: 9)
Bioresource Technology     Partially Free   (Followers: 9)
BioRisk     Open Access   (Followers: 2)
Biosaintifika : Journal of Biology & Biology Education     Open Access  
BioScience     Hybrid Journal   (Followers: 27)
Biosecurity and Bioterrorism: Biodefense Strategy, Practice, and Science     Hybrid Journal   (Followers: 3)
Biosemiotics     Hybrid Journal   (Followers: 1)
Biosensors     Open Access   (Followers: 3)
Biosensors and Bioelectronics     Hybrid Journal   (Followers: 27)
Biosensors and Bioelectronics : X     Open Access   (Followers: 2)
Bioseparation     Hybrid Journal   (Followers: 1)
Biosfer : Jurnal Biologi dan Pendidikan Biologi     Open Access  
Biosfer : Jurnal Tadris Biologi     Open Access  
BioSocieties     Hybrid Journal   (Followers: 3)
Biospecies     Open Access  
BIOspektrum     Hybrid Journal   (Followers: 5)
Biostatistics     Hybrid Journal   (Followers: 18)
Biosystematics and Ecology     Open Access   (Followers: 3)
Biosystems     Hybrid Journal   (Followers: 3)
Biosystems Diversity     Open Access  
Biota Amazônia     Open Access  
Biota Neotropica     Open Access  
Biotechnology Advances     Hybrid Journal   (Followers: 34)
Biotropia : The Southeast Asian Journal of Tropical Biology     Open Access  
Biotropica     Hybrid Journal   (Followers: 19)
Birth Defects Research     Hybrid Journal  
BJHM Open Research     Full-text available via subscription   (Followers: 1)
BMC Bioinformatics     Open Access   (Followers: 111)
BMC Biology     Open Access   (Followers: 50)
BMC Developmental Biology     Open Access   (Followers: 13)
BMC Evolutionary Biology     Open Access   (Followers: 58)
BMC Genomics     Open Access   (Followers: 69)
BMC Molecular and Cell Biology     Open Access   (Followers: 40)
BMC Proceedings     Full-text available via subscription   (Followers: 2)
BMC Research Notes     Open Access   (Followers: 3)
BMC Structural Biology     Open Access   (Followers: 8)
BMC Systems Biology     Open Access   (Followers: 16)
Boletín Científico : Centro de Museos. Museo de Historia Natural     Open Access  
Boletín del Centro de Investigaciones Biológicas     Open Access  
Boletín Micológico     Open Access  
Bone Reports     Open Access  
Bonorowo Wetlands     Open Access  
Borneo Journal of Resource Science and Technology     Open Access  
Bothalia : African Biodiversity & Conservation     Open Access  
Brain Science Advances     Open Access  
Brazilian Journal of Biological Sciences     Open Access  
Breastfeeding Medicine     Hybrid Journal   (Followers: 20)
Briefings in Bioinformatics     Hybrid Journal   (Followers: 43)
Briefings in Functional Genomics     Hybrid Journal   (Followers: 3)
British Poultry Abstracts     Hybrid Journal   (Followers: 3)
Brittonia     Hybrid Journal  
Bulletin de la Société Royale des Sciences de Liège     Open Access  
Bulletin of Experimental Biology and Medicine     Hybrid Journal  
Bulletin of Mathematical Biology     Hybrid Journal   (Followers: 9)
Bulletin of the Ecological Society of America     Open Access   (Followers: 4)
Bulletin of the Lebedev Physics Institute     Hybrid Journal  
Butlletí de la Institució Catalana d'Història Natural     Open Access  
CABI Agriculture and Bioscience     Open Access   (Followers: 1)
Caldasia     Open Access  
Cameroon Journal of Experimental Biology     Open Access  
Canadian Journal of Bioethics     Open Access  
Canadian Journal of Plant Pathology     Hybrid Journal   (Followers: 3)
Çanakkale Onsekiz Mart University Journal of Marine Sciences and Fisheries     Open Access  
Cancer Biology & Therapy     Open Access   (Followers: 11)
Cancer Cell International     Open Access   (Followers: 7)
Carbon Capture Science & Technology     Open Access  
Carbon Management     Hybrid Journal   (Followers: 5)
Carbon Resources Conversion     Open Access   (Followers: 2)
Caryologia : International Journal of Cytology, Cytosystematics and Cytogenetics     Partially Free  
Caucasiana     Open Access  
Cell     Full-text available via subscription   (Followers: 1143)
Cell Adhesion & Migration     Open Access   (Followers: 9)
Cell and Tissue Banking     Hybrid Journal   (Followers: 1)
Cell and Tissue Biology     Hybrid Journal   (Followers: 4)
Cell and Tissue Research     Hybrid Journal   (Followers: 5)
Cell Biochemistry and Function     Hybrid Journal   (Followers: 8)
Cell Biology and Development     Open Access   (Followers: 2)
Cell Biology and Toxicology     Hybrid Journal   (Followers: 10)
Cell Biology Education     Free   (Followers: 4)
Cell Biology International     Hybrid Journal   (Followers: 4)
Cell Biology International Reports     Hybrid Journal   (Followers: 2)
Cell Calcium     Hybrid Journal   (Followers: 2)
Cell Communication & Adhesion     Hybrid Journal   (Followers: 2)
Cell Cycle     Full-text available via subscription   (Followers: 5)
Cell Death and Differentiation     Hybrid Journal   (Followers: 7)
Cell Discovery     Open Access   (Followers: 2)
Cell Division     Open Access   (Followers: 1)
Cell Genomics     Full-text available via subscription   (Followers: 2)
Cell Metabolism     Full-text available via subscription   (Followers: 58)
Cell Proliferation     Open Access  
Cell Reports     Open Access   (Followers: 61)
Cell Reports Medicine     Open Access   (Followers: 3)
Cell Reports Methods     Open Access   (Followers: 1)
Cell Research     Hybrid Journal   (Followers: 11)
Cell Stress and Chaperones     Hybrid Journal   (Followers: 1)
Cell Surface     Open Access  
Cell Systems     Hybrid Journal   (Followers: 7)
Cells     Open Access   (Followers: 2)
Cells & Development     Hybrid Journal   (Followers: 3)
Cells Tissues Organs     Full-text available via subscription   (Followers: 1)
Cellular Immunology     Hybrid Journal   (Followers: 29)
Cellular Logistics     Full-text available via subscription  
Cellular Microbiology     Hybrid Journal   (Followers: 12)
Cellular Oncology     Hybrid Journal   (Followers: 3)
Cellular Reprogramming     Hybrid Journal  
Cellular Signalling     Hybrid Journal   (Followers: 10)
Ceylon Journal of Science     Open Access  
Channels     Open Access   (Followers: 1)
Check List : The Journal of Biodiversity Data     Open Access   (Followers: 2)
Chem     Hybrid Journal  
ChemBioEng Reviews     Full-text available via subscription   (Followers: 3)
Chemosensory Perception     Hybrid Journal  
Chirality     Hybrid Journal  
Chromosoma     Hybrid Journal  
Chromosome Research     Hybrid Journal   (Followers: 2)
Ciencia     Open Access  
Ciencia Amazónica (Iquitos)     Open Access  
Ciência ET Praxis     Open Access  
CienciaUAT     Open Access  
Cladistics     Hybrid Journal   (Followers: 7)
Climate Change Ecology     Open Access   (Followers: 15)
Clinical Dysmorphology     Hybrid Journal  
Clinical Phytoscience     Open Access  
Clinical Proteomics     Open Access   (Followers: 3)
Clinical Spectroscopy     Open Access  
Coevolution     Open Access  
Cogent Biology     Open Access  
Cognitive Neurodynamics     Hybrid Journal   (Followers: 2)
Cold Spring Harbor Perspectives in Biology     Full-text available via subscription   (Followers: 3)
Cold Spring Harbor Protocols     Full-text available via subscription   (Followers: 4)
Communication in Biomathematical Sciences     Open Access   (Followers: 2)
Communications Biology     Open Access  
Communications in Applied Sciences     Open Access  
Communications Materials     Open Access  
Communicative & Integrative Biology     Open Access  
Community Ecology     Full-text available via subscription   (Followers: 27)
Comparative Medicine     Full-text available via subscription   (Followers: 5)
Composite Interfaces     Hybrid Journal   (Followers: 6)
Comptes Rendus : Chimie     Open Access  
Comptes Rendus Biologies     Open Access   (Followers: 1)
Computational Biology Journal     Open Access   (Followers: 6)
Computational Mathematics and Mathematical Physics     Hybrid Journal   (Followers: 5)
Computer Methods in Biomechanics and Biomedical Engineering     Hybrid Journal   (Followers: 10)
Computer Methods in Biomechanics and Biomedical Engineering : Imaging & Visualization     Hybrid Journal  
Computers in Biology and Medicine     Hybrid Journal   (Followers: 11)
Connective Tissue Research     Hybrid Journal  
Contact (CTC)     Open Access  
Contributions to Plasma Physics     Hybrid Journal   (Followers: 3)
CRISPR Journal     Hybrid Journal  
Critical Reviews in Clinical Laboratory Sciences     Hybrid Journal   (Followers: 19)
Crustaceana     Hybrid Journal   (Followers: 6)
Cryobiology     Hybrid Journal   (Followers: 3)

  First | 1 2 3 4 5 6 7 8 | Last

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Biotropia : The Southeast Asian Journal of Tropical Biology
Journal Prestige (SJR): 0.128
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 0215-6334 - ISSN (Online) 1907-770X
Published by SEAMEO BIOTROP Homepage  [1 journal]
  • BIOLOGICAL CHARACTERISTIC OF INDONESIAN GAYO HORSE

    • Authors: Juli Melia, Amrozi Amrozi, Muhammad Agil, Iman Supriatna
      Abstract: This study aims to find out the characteristic of gayo horse and to identify the population of gayo horse. Data collection was conducted through selection process over 100 local horse distributed in Central Aceh Sub-districts, Gayo Lues and Bener Meriah. The result was 30 gayo horses with varying age distribution. Detail observation was performed on six gayo horses of male (n=3) and female (n=3). The observation consisted of morphological observation and morphometry. Data collection of gayo horse population was based on annual report from local Animal Husbandry and Fishery Official over the last 5 years. Result showed that gayo horse has straight cranial shape similar to thoroughbred with smaller size, thick and stiff mane, and ears akin to donkey. Gayo horse body height ranges between 113-120 with body weight ranging around 215-280 kg. Gayo horse is agile despite living in mountain and able to carry heavy weight. There has been drastic decline of population in year 2010-2014. In conclusion, gayo horse is included as large pony category, and without any rescue effort, gayo horse is predicted to be extinct in 2037.
      PubDate: 2022-04-28
      DOI: 10.11598/btb.2022.29.1.834
      Issue No: Vol. 29, No. 1 (2022)
       
  • Heavy Metals Contamination and Water Quality Parameter Conditions in
           Jatiluhur Reservoir, West Java, Indonesia

    • Authors: Gatot Prayoga, Bagus Amalrullah Utomo, Hefni Effendi
      Abstract: Waste pollution into the Citarum River (main water source of Jatiluhur Reservoir) was dominated by the manufacturing industry sector (textile, chemical, metal, pharmaceutical). Industrial was the most common contributor to heavy metal waste. Heavy metal contamination into waters will cause any problems, one of which was the emergence of various diseases both short and long term. Based on the issues, the study of heavy metal contamination and also water quality parameter conditions in the Jatiluhur Reservoir was necessary. The heavy metals (Cu, Zn, Hg, Pb, Cd) contents were determined using the X-Ray Fluorescence (XRF) Spectrometry method (for sediment) and Atomic Absorption Spectrometry (AAS) method (for water). The other water quality parameters were analyzed using the methods from the Indonesian National Standard (SNI). Furthermore, the data were compared to the Canadian Sediment Quality Guidelines (for heavy metal in sediment) and water quality standards from Government Regulation of the Republic of Indonesia Number 82 of 2001 (Class 3) (for water quality parameters). Concerning the discussion, Jatiluhur Reservoir was divided into three zones i.e. the inlet area, main inundation area, and outlet area. Conditions in the sedimentary layer, mercury (Hg) have accumulated throughout the Jatiluhur Reservoir area with conditions exceeding the maximum limit, while Cu metal tends to accumulate in the inlet area with conditions exceeding the minimum limit. For other heavy metals, exceed the minimum limit at some locations, but more results were below that. Although all heavy metals have not been detected in water, this was a warning that the presence of heavy metals in sediments can potentially dissolve into the water, the most extreme thing that can happen was upwelling. If this happens, the heavy metals can be contained excessively in water, harmful to and possibly consumed by aquatic biota and human. Considering these conditions, the biota that was most likely to be exposed was benthic organisms. In general, the water quality parameters in Jatiluhur Reservoir meet the quality standards. Only ammonia that does not meet the quality standards for sensitive fish life, regarding the massively of aquaculture activity in this reservoir.
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1443
      Issue No: Vol. 29, No. 1 (2022)
       
  • INHIBITORY EFFECT OF ULIN WOOD LIQUID SMOKE AND GOGO RICE ENDOPHYTIC FUNGI
           AGAINST PATHOGEN Pyricularia oryzae

    • Authors: Witiyasti Imaningsih, Mariana, Ahmad Budi Junaidi, Della Adventaria
      Abstract: Diseases in rice plants (paddy) caused by microorganisms such as Pyricularia oryzae lead to a decrease in rice production. Therefore, it is essential to find out biological agents for protecting paddy and plants in general, against plant diseases. Liquid smoke and endophytic fungi have been known as biological agents to enhance the protection of plants against disease. The purpose of this study was to determine the ability of liquid smoke, endophytic fungi and the concentrations combinations to suppress the growth of P. oryzae. The results showed that liquid smoke concentrations of 0.17% to 1.75% and endophytic fungi filtrate of 2% to 10% showed significant ability against pathogen P. oryzae. However, the combination of liquid smoke and endophytic fungi filtrate at selected concentrations (0.17% liquid smoke combined with 2% endophytic fungi filtrate and 0.34% liquid smoke combined with 2% endophytic fungi filtrate) showed no significant inhibition percentage against P. oryzae compared to control. In conclusion, this study showed that the respective applications of liquid smoke and endophytic fungi filtrate inhibit the growth of P. oryzae. Keywords: endophytic fungi, inhibition ability, liquid smoke, P. oryzae
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1568
      Issue No: Vol. 29, No. 1 (2022)
       
  • CHARACTERIZATION AND POLYPHASIC IDENTIFICATION OF NOVEL RHIZOBACTERIA
           STRAIN HAVING PLANT GROWTH PROMOTING PROPERTIES FROM COASTAL SAND DUNE
           ECOSYSTEM

    • Authors: Endah Retnaningrum
      Abstract: Coastal sand dune ecosystem at the Parangtritis coast of Yogyakarta, Indoesia has a unique characters such as low moisture of sandy soil, high salinity and low nutrient content. Fimbristylis cymosa is one of plant which survive at that unique ecosystem. Rhizobacteria present in that rhizospheric F. cymosa probably promote plant growth of its plant. In the present research, rhizobacteria from rhizospheric F. cymosa were isolated and their properties as phosphate solubilizing and antipathogen activity against Fusarium oxysporum which caused Fusarium wilt disease were investigated. Phosphate solubilizing rhizobacteria (PSR) isolates with the most potential characters were then polyphasic identified based on phenotypic and genotypic characters based on 16S rDNA sequencing. The results obtained were four PSR isolates (I8, I11, I12 and I24) with high phosphate dissolution indexes in isolates I11 and I12 of 3.08 and 3.44, respectively. Analysis of the dual plate experiments of the both PSR isolates against the growth of F. oxysporum also showed high inhibitory activity; isolate I11 was 42.40%, while isolate I12 was 42.08%. The two isolates were polyphasic identified as Burkholdera dolosa. This research clearly showed that PSR 11 and PSR 12 isolates are very potential and prospective as marginal land inoculants as providers of phosphorus and F. oxysoporum biocontrol for plants.
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1584
      Issue No: Vol. 29, No. 1 (2022)
       
  • MOLD DIVERSITY OF WREATHED HORNBILL (Rhyticeros undulatus) NEST IN MOUNT
           UNGARAN

    • Authors: Margareta Rahayuningsih
      Abstract: Wreathed Hornbill (Rhyticeros undulates) is known to build nests in three cavities where they managed to live and breed. This edifice is predicted to contain various molds needed to maintain micro-environmental steadiness. This study was aimed to identify molds diversity in the Wreathed Hornbill’s nest, using samples collected from empty structure with no bird activity. The samples were obtained from the Kalisidi and Nglimut observation stations on two occasions, i.e., in 2016 and 2017. Furthermore, the samples comprised cover soil, wood and inner material, which were collected aseptically and placed in sterile Ziplock plastic bags. These samples were then diluted in sterilized distilled water to attain 10-3 mg/ mL, and subsequently inoculated on Potato Dextrose Agar (PDA), Malt Extract Agar (MEA) and Czapek Dox Agar (CDA). The inoculants were incubated at 37 °C, followed by the observation of mold colony after the 11th day. The results identified seven and nine species of molds in the Kalisidi and Nglimut observation stations, respectively. The most abundant species was Penicillium sp. which was found in composted nest materials for the whole observation periods. Keywords: mold diversity, Mount Ungaran, nest, Rhyticeros undulates, Wreathed Hornbill
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1615
      Issue No: Vol. 29, No. 1 (2022)
       
  • GENETIC VARIABILITY OF ARROWROOT (MARANTA ARUNDINACEA L.) IN YOGYAKARTA
           PROVINCE, INDONESIA BASED ON ISSR ANALYSIS

    • Authors: Bernardinus Pratama, Purnomo -, Budi Setiadi Daryono
      Abstract: The cultivation of arrowroot (Maranta arundinacea L.) in Indonesia, particularly in Yogyakarta Province has a great potential to be developed. This study aims to determine the genetic variability and analyze the intraspecific relation of arrowroot using Inter Simple Sequence Repeats (ISSR) markers as basic informations for considerations in the character selection of arrowroot cultivation in Yogyakarta. Exploratory survey method was occured in Gunungkidul, Kulon Progo, Sleman, and Bantul Districts to collect cultivar accessions. Accessions were replanted in Sawitsari Research Station. DNA isolation from the leaves of 7 moths old accessions was done using CTAB buffer solution. The DNA fingerprinting analysis was carried out using the result of DNA amplification with 4 ISSR markers. The polymorphism data then used for phenetic analysis using UPGMA algorithm and Baroni-Urbani Busser similarity coefficient to form dendrogram. Total of 5 local cultivars were found, identified as ‘Sili’, ‘Sembowo’,’ Sugo’, ‘Kebo’, and ‘Teropng’, each showed distinct rhizome morphological characters. The ISSR-PCR analysis resulted high polymorphism with 68,17% polymorphism mean and mean of polymorphic band was 6,75. Dendrogram resulted 4 clusters in 80% similarity index. Cluster A, B.I., and B.II.b consisted of ‘Sili’, ‘Teropong’, and ‘Kebo’ cultivars, respectively, while the cluster B.II.a gathered ‘Sugo’and ‘Sembowo’ cultivars.  
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1623
      Issue No: Vol. 29, No. 1 (2022)
       
  • The Incorporation of Sodium Hyaluronate and Nyamplung (Calophylum
           inophyllum) Cake Extract to Improve Characteristic of Bioplastic

    • Authors: Rini Umiyati
      Abstract: Cross-linking agent plays important role on bio-plastic mechanical properties. In this research, sodium hyaluronate (SoHA) and nyamplung cake extract (NCE) were used as cross-linking and anti-microbia agents, respectively, in bio-plastic preparation by thermo compression method. The novelty of the study was thiocyanate (SCN) formation in zone 3 (2161.66-2162.02 cm-1) and cyanate (C-N=O) in zone 6 (1411.57 – 1412.61 cm-1) of SoHA (1, 2 and 3%) bio-plastic and cyanate formation in zone 6 and 7 (1411.37 - 1558.59 cm-1) of SoHA (1, 2 and 3%) – NCE 20% combined bio-plastic that originating from acetanilide group in SoHA and amide group in NCE. The formation of SCN and C-N=O in 2 and 3% SoHA bio-plastic improved its sensitivity against gram positive bacteria (S. aureus) indicated by 0.6 mm and 0.45 mm inhibition zone, respectively. C-N=O formed in SoHA (1, 2 and 3%) – NCE (20%) combined bio-plastic had 3.25 mm average inhibition zone against gram positive bacteria (S. aureus), 2.75 mm against gram negative bacteria (E. coli), and 0.71 mm against fungi (A. nigger). Mechanical properties analysis showed that addition of 3% SoHA was able to increase tensile strength and modulus of elasticity while reduced elongation, water solubility, and water vapor permeability. Addition of SoHA (1, 2 and 3%) – NCE 20% resulted reverse effect.
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1626
      Issue No: Vol. 29, No. 1 (2022)
       
  • LITTERFALL, LITTER DECOMPOSITION AND NUTRIENT RETURN OF REHABILITATED
           MINING AREAS AND NATURAL FOREST IN PHANGNGA FORESTRY RESEARCH STATION,
           SOUTHERN THAILAND

    • Authors: Jetsada Wongprom, Roongreang Poolsiri, Sapit Diloksumpun, Chatchai Ngernsaengsaruay, Samita Tansakul, Wasan Chandaeng
      Abstract: Litterfall and litter decomposition play important roles in maintenance of nutrient cycling and rehabilitation of degraded lands. Litterfall, litter decomposition, and nutrient return were investigated in a 27-year-old Acacia mangium plantation on sandy and clay sites, and in a mixed plantation at the Phangnga Forestry Research Station, Phangnga province, Thailand. Additionally, secondary and primary forests were investigated and compared with the values obtained from the plantations. The results indicated that litter production in A. mangium plantation on sandy and clay sites, and in mixed plantation (15.47, 11.68 and 7.89 t ha-1 yr-1, respectively) was higher than in secondary and primary forests (6.34 and 6.92 t ha-1 yr-1, respectively). The rate of litter decomposition was greatest in the secondary forest (3.01 yr-1) and lowest in the primary forest (1.15 yr-1). The decomposition rate of the mixed leaf litter between native trees and A. mangium in plantations was higher than that of only A mangium leaf, except in the mixed plantation. A high initial concentration of nitrogen in A. mangium could accelerate litter decomposition and improve the litter quality in mixed litter. In addition, the nutrient return in plantations was higher than in the secondary and primary forests, especially for N. Increased litter production, a high decomposition rate, and nutrient return from A. mangium plantation had important roles in nutrient cycling, suggesting that a mixed plantation consisting of A. mangium and native trees should be considered for the reclamation of mining land.
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1627
      Issue No: Vol. 29, No. 1 (2022)
       
  • DIVERSITY AND DENSITY NEUSTON AS BIOINDICATOR WATER QUALITY IN LAKE AND
           WATERFALL SITU GUNUNG, SUKABUMI

    • Authors: Imam Safir Alwan Nurza
      Abstract: Lakes and waterfalls are freshwater ecosystems that are considered important in their ecological, tourism, and economic roles in the surrounding environment. Lakes and waterfalls can serve for some living things, like neuston. Neuston lives on the surface and below the surface of the water. These organisms can be used as bioindicators of quality waters. Because these organisms have a high level of sensitivity to pollutants. Thus, it’s easy to observe indirect observation. The purpose of this research was to determine environmental factors on the density and diversity of neustons as bioindicator water quality in the lake and waterfall Situ Gunung, Sukabumi. The research method used was survey and observation. The research was carried out by determining purposive sampling at two locations, namely lakes and waterfalls. The sampling point with an area ​​of 1x1 m2 and the samples obtained were put into bottles containing 70% alcohol as specimens to be identified in the laboratory. Environmental parameters were measured, namely air and water temperature, water pH, water depth, turbidity, flow velocity, dissolved oxygen, substrate, and weather conditions. The results obtained that lakes and waterfalls had high density and diversity of neustons in Gerris lacustris and Dineutus assimilis. While the lowest were Metrobates hesperius, Gerris comatus, Aquarius remiges, and Trepobates pictus. Parameters of environmental factors can still support the survival of neustons in lakes and waterfalls Situ Gunung.
      PubDate: 2022-04-27
      DOI: 10.11598/btb.2022.29.1.1662
      Issue No: Vol. 29, No. 1 (2022)
       
  • THE RANGE EXPANSION OF Parachromis managuensis (GÜNTHER, 1867)
           (PERCIFORMES, 4 CICHLIDAE) IN JAVA, INDONESIA

    • Authors: Veryl Hasan, Abdul Rahem Faqih, Maftuch Maftuch
      Abstract: The Jaguar cichlid, Parachromis managuensis (Günther, 1867), is native to Central America, with introduc­tions reported from West Java and Central Java Provinces of Indonesia. On 7-8 January 2019, sixteen specimens of P. managuensis were collected from Karangkates, the largest hydropower reservoir in East Java Province of Indonesia. A description of the morphological characters of specimens is provided.
      PubDate: 2020-05-06
      DOI: 10.11598/btb.2022.29.1.1278
      Issue No: Vol. 29, No. 1 (2020)
       
 
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