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Journal articles on the topic 'Pielou´s Evenness (J')'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Gayatri, Gautam. "ASSESSMENT ON SUITABILITY OF NORMALIZING AND PROBABILITY TYPE BENTHIC INDICES FOR PREDICTION OF BEHAVIOR OF INLAND WATER BODY." International Journal of Research - GRANTHAALAYAH 3, no. 9 (Special Edition) (2017): 1–5. https://doi.org/10.5281/zenodo.852163.

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Natural variability in diversity of benthic macro invertebrate fauna or benthos has become a valuable tool in assessing, modeling and monitoring of water quality of inland water body with respect to its portability and of pollution level. However, inappropriate use of these indices may leads to false interpretation or prediction of behavior of inland water body. In this study we have employed two normalizing (i.e Shannon-Wiener Index (H’), Pielou´s Evenness (J’)) and one probability type (HurlbertPIE Index (PIE)) indices to evaluate behavior of Baikona tank water body between Jan-2008 to Dec 2

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2

Liu, Chenwei, Xu Sun, Lianghu Su, Jinbang Cai, Longjiang Zhang, and Liyun Guo. "Assessment of phytoplankton community structure and water quality in the Hongmen Reservoir." Water Quality Research Journal 56, no. 1 (2021): 19–30. http://dx.doi.org/10.2166/wqrj.2021.022.

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Abstract To find effective measures to control the water quality of the Hongmen Reservoir, it is necessary to better understand its phytoplankton composition, abundance and spatial and temporal distribution. Samples were collected at three sampling sites in January (dry season), May (wet season) and September (normal season) in 2019. Trophic level and stability status were assessed on the basis of the Shannon diversity index (H), species richness (S) and evenness (J) index. The different relationships between phytoplankton and the concentrations of several physicochemical parameters and the ma

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3

Quirino, G. Pascua. "Assessment on species diversity of fishes in Buguey Lagoon, Cagayan, Northern Philippines." Journal of Biodiversity and Environmental Sciences (JBES) 24, no. 3 (2024): 135–41. https://doi.org/10.5281/zenodo.14488275.

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The diversity of fishes along Buguey Lagoon remains underrepresented in research and conservation efforts. This study generally aimed to assess the diversity and document the species richness of fishes. Specifically, the study was conducted to determine diversity indices, IUCN status, and to generate a database for policy formulation towards the conservation of species and its management. Results of the study showed significant differences in fish diversity index in terms of Shannon–Weinner index, Simpson’s Reciprocal Index (1/D), Margalef’s diversity index (d), and Berger-Pa

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4

Nepali, Pit Bahadur, and Nanda Bahadur Singh. "Species diversity of reptiles in Palpa District, Nepal." Nepalese Journal of Zoology 6, S1 (2022): 20–25. http://dx.doi.org/10.3126/njz.v6is1.50526.

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Gastrointestinal (GI) This study was conducted in agricultural field, forests, riparian and wetland habitats, and human habitats of six sampling sites in Palpa, Nepal, from May 2016 and April 2020. The purpose of the study was to document and measure the richness, abundance, and diversity of the reptile in this district. Data was collected randomly in these habitats of this district using quadrat, visual encounter, and opportunistic survey methods. For 100 quadrates for each site seasonally, 20 quadrats were placed in each habitat along 5 transects. In total, 554 individual species belonging t

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Mousumi, Das. "A report on diversity and abundance of butterfly (Lepidoptera: Rhopalocera) fauna at the surrounding vegetation of Rabindra Sarobar, Kolkata, West Bengal, India." Journal of Biodiversity and Environmental Sciences (JBES) 24, no. 6 (2024): 30–45. https://doi.org/10.5281/zenodo.15074095.

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Butterflies are considered indicator species for conservation planning and environmental monitoring as their diversity and abundance are visibly affected by anthropogenic activities. In this study, the diversity and abundance of butterfly fauna in the surrounding vegetation of Rabindra Sarobar, Kolkata, India was assessed to provide baseline information on the size of species richness and prospective utilization in urban planning and conservation. A total of 64 butterfly species under 5 families and 44 genera were recorded over a period of ten months from June 2023 to March 2024. Family Nympha

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Adeleye, Afeez Olukunmi Moussa Soulé Hamidou Taffa Abdoul-Azize Atanda Toyeeb Abidemi Osoba Akolade Emmanuel. "Role of Urban Zoological Park in Woody Species Conservation and Carbon Sequestration: Insight from Funaab Zoo Park in Abeokuta, Nigeria." LC International Journal of STEM (ISSN: 2708-7123) 2, no. 3 (2021): 56–63. https://doi.org/10.5281/zenodo.5751753.

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This study determines the role of FUNAAB zoo park Abeokuta, Ogun State in tree biodiversity conservation and carbon sequestration of Abeokuta city in Nigeria. A systematic sampling approach was used and the tree biodiversity inventory was conducted. Accordingly, the study identified 30 plant species and 15 families with <em>Fabaceae</em> as the dominant family (6 species).  Shannon diversity index (H′) was 3.29 and Pielou's evenness (J') was 0.97 in the park. There were more native woody species (80%) than exotic (20%) in the park. Tree species were the dominant growth form

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7

Gautam, Gayatri. "ASSESSMENT ON SUITABILITY OF NORMALIZING AND PROBABILITY TYPE BENTHIC INDICES FOR PREDICTION OF BEHAVIOR OF INLAND WATER BODY." International Journal of Research -GRANTHAALAYAH 3, no. 9SE (2015): 1–5. http://dx.doi.org/10.29121/granthaalayah.v3.i9se.2015.3120.

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Natural variability in diversity of benthic macro invertebrate fauna or benthos has become a valuable tool in assessing, modeling and monitoring of water quality of inland water body with respect to its portability and of pollution level. However, inappropriate use of these indices may leads to false interpretation or prediction of behavior of inland water body. In this study we have employed two normalizing (i.e Shannon-Wiener Index (H’), Pielou´s Evenness (J’)) and one probability type (HurlbertPIE Index(PIE)) indices to evaluate behavior of Baikona tank water body between Jan-2008 to Dec 20

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8

E., Omoregie. "MACROINVERTEBRATE DIVERSITY IN A SUBTROPICAL HIGH-PRESSURE ZONE (SHPZ) MAN-MADE LAKE: GOREANGAB DAM, WINDHOEK, NAMIBIA." International Journal of Zoology and Applied Biosciences 5, no. 5 (2020): 274–82. https://doi.org/10.5281/zenodo.4305925.

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This research investigated the diversity and distribution of macro invertebrate assemblages of a sub-tropical high-pressure belt man-made lake, the Goreangab Dam, in Windhoek, Namibiain order to develop a respective index of biotic integrity as a baseline of determining and monitoring the health status of the dam. Macro invertebrates samples were collected biweekly, over a period of two months (August and September 2019) from 8 stations along the bank of the dam. Collected macroinvertebrate samples were sorted live, counted and identified to the lowest taxonomic level possible. The Shannon Wei

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9

Mohammad, Farhangi, Hosseini Seyed Abbas, Jafaryan Hojatollah, Ghorbani Rasoul, Harsij Mohammad, and Sudagar Mohammad. "The Environmental Impact of Sturgeon Pen Culture on Diversity and Spatial Distribution Patterns of the Benthic Macro Fauna Communities in Gorgan Bay." Environment and Pollution 8, no. 2 (2019): 31. http://dx.doi.org/10.5539/ep.v8n2p31.

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Community structure and biodiversity of benthic macro fauna in around pen culture of Sturgeon fish in Gorgan Bay were studied for period of one year from August 2015 to July 2016. Seasonal samplings were carried out at 5 stations in 3 transects. In addition, depth (D), water temperature (Toc), dissolved oxygen (DO); pH, total dissolved solid (TDS), biological oxygen demand (BOD5), chemical oxygen demand (COD), phosphorus (PO4-3), nitrite (NO2-) and total ammonia (NH3+) were measured in each station. Results of season variations of Physico &ndash; chemical factors of water showed that, ther

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10

Mousumi, Das. "An insight into the abundance and diversity of butterfly (Insecta: Lepidoptera) fauna in surrounding vegetation of Subhas Sarobar, Kolkata, India." Journal of Biodiversity and Environmental Sciences (JBES) 24, no. 5 (2024): 31–44. https://doi.org/10.5281/zenodo.14948555.

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Butterflies are the indicator species as their diversity and abundance represent the health of a habitat and act as a tool for monitoring the impact of urbanization in an area. The aim of the present research paper is to estimate the diversity and abundance of butterfly fauna in the surrounding vegetation of Subhas Sarobar, Kolkata, India. The present study recorded 74 butterfly species of 5 families and 56 genera, which were sampled over a period of nine months from June 2023 to February 2024. Out of 74 species, 16 species belong to family Nymphalidae, 17 species to Lycaenidae, 3 species to P

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Md., Anowarul Haque, Rashed-Un-Nabi Md, Masum Billah Md, et al. "Effect of water parameters on temporal distribution and abundance of zooplankton at Kaptai lake reservoir, Rangamati, Bangladesh." Asian Journal of Medical and Biological Research 4, no. 4 (2018): 389–99. https://doi.org/10.3329/ajmbr.v4i4.40112.

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Seasonal abundance of zooplankton in relation to different physico-chemical conditions of Kaptai lake has been studied. A total of four major groups of zooplankton were identified from study area of Kaptai lake during three seasons observation at pre-monsoon, monsoon and Post-monsoon. These four groups were categorized into rotifers, copepods, cladocerans and others (fish larvae, shrimp larvae, insects, mosquito larvae etc.). The mean abundance of group rotifers, copepods, cladoceras and others were 103, 84.67, 38.33 and 41.83 ind. L<sup>-1</sup> respectively. The highest group was rotife

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NJ., Romain. "Diversity and floristic composition of woody plants in the Mbalmayo Forest Reserve (Centre, Cameroon)." Journal of Biodiversity and Environmental Sciences (JBES) 22, no. 5 (2023): 104–17. https://doi.org/10.5281/zenodo.10499453.

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Unlike other countries in the region, Cameroon is already experiencing very significant pressure on land, not only due to demographic factors but also related to the development of economic activities. This study focuses on the characterization of ligneous species in the Mbalmayo forest reserve. Trees having ≥10cm diameter at breast height (D.B.H) were identified and measured in 33 plots (250m x 20m). Species composition, structure, and conservation status of trees were assessed. Results of the study indicated that there were 129 tree species belonging to 100 genera and 33 families. The plo

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Wu, Wenxiang, Xuesong Du, Zhiwei Qin, Qingrong Liu, and Fujing Pan. "Integrated Rice-Snail-Crayfish Farming System Shapes Soil Microbial Community by Enhancing pH and Microbial Biomass in South Subtropical China." Agriculture 14, no. 12 (2024): 2133. http://dx.doi.org/10.3390/agriculture14122133.

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Within the framework of sustainable agriculture, the integrated rice-snail-crayfish farming system has been recognized as a highly efficient agroecological approach that enhances crop production while minimizing the application of chemical fertilizers and pesticides. Nonetheless, the mechanisms by which this system influences soil microbial community composition to achieve these benefits remain unknown. In this study, we focused on traditional rice farming (TR), the integrated rice-snail-crayfish (R-S-C) farming system, and mono-rice farming (CK), and systematically examined the impacts of the

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14

Hu, Xuefan, Guangshuang Duan, Yingshan Jin, et al. "Study on the Natural Regeneration Characteristics and Influencing Factors of Typical Quercus Forests in Northern China." Forests 16, no. 2 (2025): 250. https://doi.org/10.3390/f16020250.

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This study aims to analyze the natural regeneration characteristics and the key factors of Quercus forests, providing a theoretical foundation for maintaining the ecological stability of Quercus forests in northern China. In June and July 2023, 17 square plots of five Quercus species in Beijing were surveyed, and seedling regeneration and environmental factors (site, stand and soil factors) were measured. Pearson correlation and random forest algorithms were used to identify the relevant and key environmental factors affecting seedling regeneration density (Seedling 1, Seedling 2, Seedling 3).

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15

Putra, I. Nyoman Giri, Elok Faiqoh, and I. Gusti Ngurah Made Wiratama. "Status Konservasi dan Keanekaragaman Jenis Ikan yang Diperdagangkan di Pasar Ikan Tradisional di Bali." Jurnal Kelautan Tropis 25, no. 2 (2022): 149–55. http://dx.doi.org/10.14710/jkt.v25i2.13610.

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The high demand for fish for local consumption and export has led to overfishing and increased the trade of fish that are prohibited by law and international agreements. Therefore, this study aims to calculate species diversity and determine the conservation status of fish traded in traditional fish markets in Bali. Field sampling was carried out at fish markets located in Badung, Buleleng, Karangasem, and Jembrana. Samples are identified to the lowest taxa level that can be determined, based on morphological characters. Diversity parameters such as the Shannon diversity index (H), Simpson (Si

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16

Steinfurth, RC, T. Lange, NS Oncken, E. Kristensen, CO Quintana, and MR Flindt. "Improved benthic fauna community parameters after large-scale eelgrass (Zostera marina) restoration in Horsens Fjord, Denmark." Marine Ecology Progress Series 687 (April 7, 2022): 65–77. http://dx.doi.org/10.3354/meps14007.

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Eutrophication is a key driver in the loss of marine ecosystems, and seagrass meadows are among the many ecosystems which have declined globally during the last decades. Seagrass restoration is being used worldwide in coastal areas to counteract the decline in areal extent and to promote biodiversity. This study assesses the spatial and temporal changes in benthic fauna composition after a successful large-scale eelgrass (Zostera marina) transplantation in Horsens Fjord, Denmark. Transplantation was done by anchoring individual shoots in the sediment. Subsequently, benthic fauna was compared a

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17

Marsaro Júnior, AL, DB Nascimento, B. Ronchi-Teles, and R. Adaime. "Faunistic analysis of the species of Anastrepha Schiner (Diptera: Tephritidae) in three municipalities of the state of Roraima, Brazil." Brazilian Journal of Biology 72, no. 4 (2012): 813–19. http://dx.doi.org/10.1590/s1519-69842012000500006.

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The purpose of this work was to describe the population patterns of Anastrepha in three municipalities of the state of Roraima, Brazil, via faunistic analysis. Weekly collections were performed from January through December 2008, using McPhail traps containing 5% hydrolysed protein, in domestic orchards in the municipalities of Boa Vista, Bonfim and Pacaraima. We captured 301 females of Anastrepha in Boa Vista, 212 in Bonfim, and 167 in Pacaraima. Boa Vista presented the highest species richness (S = 10) and Pacaraima the lowest (S = 4). Anastrepha striata was the predominant species in Boa Vi

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18

Arabuli, Tea, and Mariam Gogshelidze. "Soil mite (Acari: Oribatida) communities in the limestone quarry of Saskhori (Gerogia)." Caucasiana 2 (November 17, 2023): 189–97. http://dx.doi.org/10.3897/caucasiana.2.e110495.

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Abstract The present publication provides a review of the soil mite (Acari; Oribatida) community’s structure and the connection between changes in environmental factors and oribatid mite diversity in the limestone quarry of Saskhori and its adjacent areas. Overall, 52 species were recorded during the study. The most abundant oribatid mite species were Steganacarus carinatus, Aleurodamaeus setosus, Xenillus tegeocranus, Ceratoppia bipilis, Oribatula tibialis, and Punctoribates punctum. Interestingly, 23 species of oribatid mites were recorded for the first time from the limestone quarry of Sask

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Łukasz, Junkiert, and Gorczyca Jacek. "Zgrupowania piewików (Hemiptera: Fulgoromorpha et Cicadomorpha) wybranych zbiorowisk roślinnych Parku Krajobrazowego Cysterskie Kompozycje Krajobrazowe Rud Wielkich." Monographs of the Upper Silesian Museum 13 (April 17, 2020): 1–146. https://doi.org/10.5281/zenodo.3906253.

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Planthopper and leafhopper communities (Hemiptera: Fulgoromorpha et Cicadomorpha) of selected plant associations of The Landscape Park of The Cistercian Landscape Compositions of Rudy Wielkie.  The study presents the results of the faunistic research of planthoppers and leafhoppers of Rudy Landscape Park – a protected area in southern Poland, within Silesian Voivodeship. Qualitative research was conducted between 2011 and 2014 on the whole area of Rudy Landscape Park. Quantitative studies were conducted between 2012 and 2013 on 15 selected research plots wit

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Głowacka, Aleksandra, and Ewelina Flis-Olszewska. "The biodiversity of weed communities of dent maize, narrow-leaved lupin and oat in relation to cropping system and weed control." Agronomy Science 77, no. 3 (2022): 123–37. http://dx.doi.org/10.24326/as.2022.3.9.

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The aim of the experiment was to assess the effect of cropping system and as well as various methods of weed control on the biodiversity of the weed community of dent maize, narrow-leaved lupine and spring oat. The data used in the study came from a three year field experiment carried out at the Experimental Station in south-eastern Poland (50°42'N, 23°16'E). The following factors were studied: 1. Cropping system – sole cropping and strip intercropping; 2. Weed control – mechanical and chemical. Changes in the diversity of the segetal flora are analysed using the species richness index (S), th

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Arabuli, Tea, and Mariam Gogshelidze. "Soil mite (Acari: Oribatida) communities in the limestone quarry of Saskhori (Gerogia)." Caucasiana 2 (November 17, 2023): 189–97. https://doi.org/10.3897/caucasiana.2.e110495.

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Abstract The present publication provides a review of the soil mite (Acari; Oribatida) community's structure and the connection between changes in environmental factors and oribatid mite diversity in the limestone quarry of Saskhori and its adjacent areas. Overall, 52 species were recorded during the study. The most abundant oribatid mite species were <i>Steganacarus carinatus</i>, <i>Aleurodamaeus setosus</i>, <i>Xenillus tegeocranus</i>, <i>Ceratoppia bipilis</i>, <i>Oribatula tibialis</i>, and <i>Punctoribates punctum</i>. Interestingly, 23 species of oribatid mites were recorded for the fi

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22

Kowalska, Anna. "Neofityzacja łęgów jesionowo-wiązowych w dolinach polskich rzek = Neophyte-induced degradation of Poland’s riparian hardwood forests." Przegląd Geograficzny 92, no. 3 (2020): 327–40. http://dx.doi.org/10.7163/przg.2020.3.1.

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Riparian hardwood forests have become very rare in most areas across Europe, as their fertile habitats have mostly been transformed into grasslands and arable land. Furthermore, where small patches remain, these are seen to be subject to major changes in soil cover and plant composition, thanks to habitat change induced by drainage, river engineering, the construction of river embankments and forestry. A further, highly visible symptom of the degradation of riparian hardwood forest is invasion by alien species (neophytes). This article therefore draws on work to analyze Poland’s vegetation of

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23

Rana, Gita, Angsuman Chanda, and Sanjat Kumar Sahu. "The Salinity-related Spatial Distribution of Penaeid and Palaemonid Prawns in Subarnarekha Estuary, East Coast of India." UTTAR PRADESH JOURNAL OF ZOOLOGY 46, no. 11 (2025): 319–34. https://doi.org/10.56557/upjoz/2025/v46i115033.

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Subarnarekha estuary is important for edible faunal diversity (fish, crab and prawn) in East Coast of India. Prawns are collected throughout the year from January 2023 to December 2024 at two sites Kumbhirgari/Kirtania (S-I) and Dogra (S-II) of the river. Variant environment provides different prawn community resources. Commercially important adult penaeid prawns are found at S-II and both juvenile and adult penaeid as well as palaemonid prawns are found at S-I. These two different salinity gradient environments are formed mainly due to tidal activity as a result of lunar cycle. Salinity range

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Tran, Thai Thanh, Nguyen Le Que Lam, Nguyen Thi My Yen, et al. "Using free-living nematode communities as biological monitoring of environmental quality status in Ben Tre city." Science and Technology Development Journal - Natural Sciences 4, no. 4 (2020): First. http://dx.doi.org/10.32508/stdjns.v4i4.866.

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Nematode communities were used as a tool to assess the environmental quality status of sediment of the water bodies in Ben Tre city. Eight locations in the main canals and river in the city were surveyed during the rainy season (September). The study recorded 51 genera belonging to 33 families, 10 orders (Araeolaimida, Chromadorida, Desmodorida, Dorylaimida, Enoplida, Monhysterida, Mononchida, Plectida, Rhabditida, and Triplonchida), 2 classes (Chromadorea and Enoplia). The density of nematode communities at most survey locations is quite high, ranging from 29.88 +/- 38.01 to 1172.08 +/- 659.7

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MARIMON, B. S., J. M. FELFILI, and M. HARIDASAN. "STUDIES IN MONODOMINANT FORESTS IN EASTERN MATO GROSSO, BRAZIL: I. A FOREST OF BROSIMUM RUBESCENS TAUB." Edinburgh Journal of Botany 58, no. 1 (2001): 123–37. http://dx.doi.org/10.1017/s096042860100049x.

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The occurrence of a monodominant tropical forest dominated by the tree species Brosimum rubescens Taub. (Moraceae) in the transition zone between the cerrado region and the Amazonian rain forests along the Araguaia valley in the state of Mato Grosso in Brazil is reported. A 6000m2 (40×150m) area located in the central portion of a forest (14°50′47″S, 52°08′37″W) on the Eldorado Farm in Nova Xavantina was sampled to determine the structure, phytosociology and soil properties. A total of 44 tree species was found in the forest, with a Shannon diversity index (H′) of 2.37 and the Pielou evenness

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Deng, Fuying, Yunling He, and Runguo Zang. "Recovery of Functional Diversity Following Shifting Cultivation in Tropical Monsoon Forests." Forests 9, no. 9 (2018): 506. http://dx.doi.org/10.3390/f9090506.

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The relationship between biodiversity and ecosystem functioning is an important issue in ecology. Plant functional traits and their diversity are key determinants of ecosystem function in changing environments. Understanding the successional dynamics of functional features in forest ecosystems is a first step to their sustainable management. In this study, we tested the changes in functional community composition with succession in tropical monsoon forests in Xishuangbanna, China. We sampled 33 plots at three successional stages—~40-year-old secondary forests, ~60-year-old secondary forests, a

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Santos, Brainerd Gomes dos, Karolline Rosa Cutrim Silva, Wilian Vieira da Silva, Germano Sousa da Silva, Edison Fernandes da Silva, and Carlos Augusto Rocha de Moraes Rego. "Soil Fauna Diversity in Management Systems of a Yellow Argisol in the Northeastern Brazilian Cerrado." Revista de Gestão Social e Ambiental 19, no. 7 (2025): e012843. https://doi.org/10.24857/rgsa.v19n7-042.

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Objective: To characterize the edaphic fauna of a Yellow Argisol in the Cerrado biome of Eastern Maranhão under different management systems. Theoretical Framework: The research is grounded in literature concerning soil fauna, the ecosystem and environmental services it provides, and its relationship with soil management in agricultural activities. Method: Soil monoliths were collected from a Yellow Argisol under three management systems: Crop-Livestock Integration (CLI), Perennial Pasture (PP), and a reference area of Native Cerrado vegetation (NC), following the TSBF (Tropical Soil Biology a

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Cecchini, Massimo, Sirio Cividino, Rosario Turco, and Luca Salvati. "Population Age Structure, Complex Socio-Demographic Systems and Resilience Potential: A Spatio-Temporal, Evenness-Based Approach." Sustainability 11, no. 7 (2019): 2050. http://dx.doi.org/10.3390/su11072050.

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The present study illustrates an original approach grounded on entropy theory and complex system thinking with the aim to investigate changes over time and space in population structure by age in Italy, in light of socioeconomic resilience and post-crisis recovery potential. Assuming that population structure may reflect different levels of resilience to exogenous shocks, a Pielou J evenness index was calculated on census data made available every 10 years (1861–2011) with the aim to identify compositional homogeneity (or heterogeneity) in the age structure of the Italian population. Trends ov

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Bhatta, Kishor Prasad, Menaka Pant Neupane, Anisha Aryal, and Sujan Khanal. "Impact of Invasive Alien Plant Species Removal in the Forest Management: Findings from Terai and Mid-Hills of Nepal." Forest Research: Open Access 10, no. 1 (2021): 9. https://doi.org/10.5281/zenodo.11125866.

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Invasive Alien Plant Species (IAPS) are major threat to the earth’s plant biodiversity. With the rapid expansion of IAPS in Nepal, the techniques of using IAPS in form of charcoal have derived profound benefit to the forest condition. This study aims to analyse the effect of removal of IAPS on forest management in terms of plant diversity at regeneration level. In addition, the impact on the species richness, species evenness and stand density was also studied for three community forests representing different physiographic zones of Nepal. Each forest was divided into two blocks- treatme

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A. H., Nurridan. "The Fish and Prawn Diversity of Sungai Pasu,Miri Sarawak." Sarawak Museum Journal LXXXIV, no. 105 (2021): 135–46. http://dx.doi.org/10.61507/smj22-2021-bb77-09.

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Sungai Pasu is one of the adjoining rivers to Kuala Baram and plays a significant economic role in terms of fisheries. This study was carried out to investigate the fish and prawn species diversity in Sungai Pasu using local fishing boats and cast nets in wet season and dry season. The wet season in this study was in March 2019, November 2019 and March 2020, while the dry season was in April to August 2019. Fish and prawn diversity indices were calculated using Shannon-Weiner and Pielou Evenness. A total of 37 species from 24 families were recorded. The dominant fish species recorded was Kurtu

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Li, Lin, Zhifeng Wen, Shiguang Wei, Juyu Lian, and Wanhui Ye. "Functional Diversity and Its Influencing Factors in a Subtropical Forest Community in China." Forests 13, no. 7 (2022): 966. http://dx.doi.org/10.3390/f13070966.

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Functional diversity is considered a key link between ecosystem functions and biodiversity, and forms the basis for making community diversity conservation strategies. Here, we chose a subtropical forest community in China as the research object, which is unique in that other regions of the world at the same latitude have almost no vegetation cover. We measured 17 functional traits of 100 plant species and calculated seven different functional diversity indices, based on functional richness, evenness, and divergence. We found that most functional diversity and species diversity indices signifi

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Coelho, Geraldo Ceni, Marivana da Silva Rigo, Juliana Boniatti Libardoni, Rosemeri de Oliveira, and Glaci Benvenuti-Ferreira. "Understory structure in two successional stages of a Semi-deciduous Seasonal Forest remnant of Southern Brazil." Biota Neotropica 11, no. 3 (2011): 63–74. http://dx.doi.org/10.1590/s1676-06032011000300004.

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The knowledge of structure and composition of forest strata contributes to understanding the conservation status and dynamics of plant communities. The study of forest understory is important to the knowledge of the succession process. The Seasonal Subtropical Forest remnant named Mato do Silva (27º 55'26" S and 53º 53'15" W) was studied aiming to describe the structure of understory in the late successional forest (LF) and in the young secondary forest (SF), an 11 years old post-agricultural site with canopy dominance of Ateleia glazioveana Baill. The phytosociological survey was carried out

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Sanindhar, Shreedhar Gaikwad, and Anandrao Kamble Nitin. "POPULATION DYNAMICS OF MALACO FAUNAL ASSEMBLAGE." Biolife 2, no. 3 (2022): 825–33. https://doi.org/10.5281/zenodo.7220411.

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<strong>ABSTRACT</strong> Malaco fauna is the second largest and richest fauna after insect. It is globally distributed and acquired every possible niche of the planet earth except aerial one. It has numerous economic characteristics, amongst which bioindication is remarkdly important. Numbers of molluscan species were utilized world widely as biomonitoring agents, because of its sedentary and sessile nature. The present investigation aimed to describe the population dynamics of the molluscan fauna along with contamination level of the region. In order to describe the ecological conditions and

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Fera Rahmawati, Yunita, Rizka Apriani Putri, Tatag Bagus Putra Prakarsa, Milade Annisa Muflihaini, and Yoga Putra Aliyani. "Diversity and Distribution of Molluscs in the Intertidal Zone of Nglambor Beach, Gunung Kidul, Yogyakarta." BIO Web of Conferences 33 (2021): 01002. http://dx.doi.org/10.1051/bioconf/20213301002.

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The intertidal zone is the area between the highest and lowest tides, which represents the transition from ocean conditions to land conditions. This study aimed to determine the diversity and distribution of mollusks that exist along the intertidal zone of Nglambor Beach, between August and November 2020. Observations of all molluscs were carried out at two random stations using 10 plots measuring 1 x 1 m 2 with 5 meters. A total of two classes of Mollusca (Gastropod and Bivalvia) belonging to twelve families and 19 species were found from upper to lower an intertidal zone. The upper intertida

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Zhang, Ziqi, Lei Yang, Dongxu Han, and Hongyan Shen. "Phytoplankton Community Investigation and Water Quality Assessment of M River in winter in Shijiazhuang City." E3S Web of Conferences 267 (2021): 01035. http://dx.doi.org/10.1051/e3sconf/202126701035.

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An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species of phytoplankton belonging to 6 phyla and 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted for 34.21%, followed by Cyanophyta with 26.32% and Chlorophyta with 28.95%. The density of phytoplankton was 63.0*106 inds/L which indicated as eutrophic water body. The highest density was Bacillariophyta, accounting for 51.03%. The Shannon-Wiener diversity index (H’) varied from 1.34 to 2.24, the Margalef Species diversi

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Nazma, Khatun and Debnath Palit. "Assessment of Phytoplankton Diversity and its Role in Biomonitoring Water Quality of Pitlakes in the Raniganj Coalfield, India." Environmental Science Archives 4, no. 1 (2025): 247–56. https://doi.org/10.5281/zenodo.15269536.

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This work presents the detailed study of the composition and diversity of phytoplankton and its dynamics through different seasons in the pitlake ecosystem. Several pitlakes of Raniganj coalfield were selected for that purpose. A total of 66 species of phytoplankton belonging to 7 phyla and 10 classes of phytoplankton were recorded. Bacillariophyceae was the most prevalent class of phytoplankton, whereas Heterokontophyta was the most prevalent phylum. Several diversity indices such as Menhenik, Margalef, Dominance, Simpson, Shannon, Berger-Parker, Brillouin, and Pielou’s Evenness index w

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Rohman, S. N., A. Mardiastuti, and Y. A. Mulyani. "Bird diversity in several land use types in Boyolali, Central Java." IOP Conference Series: Earth and Environmental Science 1220, no. 1 (2023): 012009. http://dx.doi.org/10.1088/1755-1315/1220/1/012009.

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Abstract Land use changes were thought to affect the diversity and feeding guilds of bird species. This research aims to determine the effect of five land use types (rice fields, settlements, cropland, tree plantation, and secondary forest) on species diversity and feeding guilds of bird species in Boyolali Regency. Methods used were the standard point count and the MacKinnon species list. Bird data were analyzed using the Margalef richness index, Shannon-Wiener diversity index, Pielou evenness index, and Sorensen community similarity. The total species recorded was 46 species from 26 families

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Lucheta, Fabiane, Gabriel Nicolini, Gerson Luiz Ely Junior, et al. "Phytosociological study of a riverine forest remnant from Taquari river, State of Rio Grande do Sul, Brazil." Hoehnea 45, no. 1 (2018): 149–58. http://dx.doi.org/10.1590/2236-8906-79/2017.

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ABSTRACT Aiming to characterize the structure of the arboreal community in a riverine forest remnant of the Taquari river, State of Rio Grande do Sul, 42 sampling units of 100 m2 (10 × 10 m) were located. Phytosociological parameters were also assessed and the indexes of Shannon diversity (H') and Pielou evenness (J) were evaluated. A total of 39 species, 21 families, 2.83 nats ind-1 for H' and 0.77 for J were recorded. Among the species found, the endemic Callisthene inundata O.L. Bueno, A.D. Nilson & R.G. Magalh. and Picrasma crenata (Vell.) Engl. are included in the list of endangered s

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Chandra, Anup, Harsh Naithani, and Praveen Verma. "Forest Phyto-Diversity Assessment of West Champaran District of Bihar, Eastern India." American Journal of Agriculture and Forestry 13, no. 2 (2025): 103–17. https://doi.org/10.11648/j.ajaf.20251302.13.

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Regular biodiversity assessment is the key to judicial utilization and conservation of forest plant resources. Forest phyto-diversity in West Chaparan, Bihar, has been investigated in the current research. Assessment was conducted at 10 random forest locations. We estimated Important Value Index (IVI), Shannon and Wiener index, Simpson Index, and Pielou&apos;s evenness index. A total of 193 species were reported from the study area. Habit-wise number of species of trees, shrubs, herbs, climbers, grasses, sedges, and bamboo are 87, 27, 38, 16, 22, 02, and 01, respectively. Research revealed

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Soesatrijo, Jojon. "Role of Predation and Abundance of Biological Control Agents (Ordo Hemiptera, Family Reduviidae) at Subang Palm Oil Plantation Experimen." Jurnal Syntax Transformation 4, no. 1 (2023): 1–14. http://dx.doi.org/10.46799/jst.v4i1.675.

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The Hemiptere Order of the Family Reduviidae has an important role in an ecosystem, namely as a natural enemy (predator) of insects, the hemiptera group itself and other arthropods. This study aims to determine the role of predation and the abundance of natural enemies in the order Hemiptera family reduviidae on oil palm plantations. This study and research was carried out in the area of a productive oil palm plantation in the village of Karapyak, Cintamekar Serangpanjang, Subang, Jawa Barat. This research is an exploratory research conducted from September 2022 to mid-December 2022. Sampling

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Kengne Fotsing, Joséphine, Samuel Foto Menbohan, Albin Meyer, Alain Leprêtre, and Philippe Usseglio-Polatera. "Relationships between Physico-Chemical Parameters and Taxonomic Structure of Benthic Macroinvertebrate Assemblages in Streams of West Cameroon." Water 14, no. 9 (2022): 1490. http://dx.doi.org/10.3390/w14091490.

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Tropical rivers are strongly influenced by stormwaters, pollutants and agro-pastoral activities. These systems are no longer able to maintain their native biota. Therefore, it seems important to understand how biological assemblages are driven by environmental gradients at different spatial scales. However, information on the relationships between the distribution of aquatic macroinvertebrates and environmental variables remains scarce in Cameroon. To improve our knowledge on the drivers of such distributions, a study was carried out at 11 contrasted sites from three catchments located in West

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MATIUS, PAULUS, SANTOSO JAYA MUDITA TJWA, MIRA RAHARJA, SAPRUDDIN SAPRUDDIN, SILVIANA NOOR, and YOSEP RUSLIM. "Plant diversity in traditional fruit gardens (munaans) of Benuaq and Tunjung Dayaks tribes of West Kutai, East Kalimantan, Indonesia." Biodiversitas Journal of Biological Diversity 19, no. 4 (2018): 1280–88. http://dx.doi.org/10.13057/biodiv/d190414.

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Matius P, Tjwa SJM, Raharja M, Sapruddin, Noor S, Ruslim Y. 2018. Plant diversity in traditional fruit gardens (munaans) ofBenuaq and Tunjung Dayaks tribes of West Kutai, East Kalimantan, Indonesia. Biodiversitas 19: 1280-1288. Munaans are traditionalfruit gardens of the Benuaq and Tunjung Dayaks tribes of West Kutai, East Kalimantan, Indonesia. This research was conducted inMencimai, a Benuaq Dayak’s village and Sekolaq Darat, a Tunjung Dayak’ village. A 1.0 ha plot of old munaan lou (lembo lamin) inMencimai Village was used as representative study site for Benuaq ethnic traditional fruit gar

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Ikhsan, Zahlul, and Aulia Oktavia. "Diversity and Composition of Hymenoptera Around Tidal Swamp Rice In Indragiri Hilir District, Indonesia." Andalasian International Journal of Agricultural and Natural Sciences (AIJANS) 2, no. 02 (2021): 13–20. http://dx.doi.org/10.25077/aijans.v2.i02.13-20.2021.

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Pest attacks on rice plants can cause a detrimental decrease in production. Hymenoptera has many important roles in ecosystems, including as parasitoids and predators of pests. The purpose of this study was to determine the presence of Hymenoptera around tidal swamp rice in Indragiri Hilir Regency, Indonesia. Sampling used four traps, namely: 1) swing net; 2) yellow pan trap; 3) malaise trap; and 4) pitfall traps. The analysis was carried out by calculating the Shannon-Wiener diversity index (H'), the Margalef species richness index (D), the Pielou species evenness index (J). Hymenoptera found

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Nurhafizah-Azwa, S., and A. K. Ahmad. "Biodiversity of benthic macroinvertebrates in Sungai Kisap, Langkawi, Kedah, Malaysia." Journal of Tropical Resources and Sustainable Science (JTRSS) 6, no. 1 (2021): 36–40. http://dx.doi.org/10.47253/jtrss.v6i1.725.

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A study on macroinvertebrate diversity was conducted in Sungai Kisap, Langkawi, Kedah. Five stations were selected with a distance of approximately 500 metres apart with three replications of benthos and two replications of water sample. The results classified Sungai Kisap in Class I, which indicates very good water quality based on WQI recommended by the Department of Environment. A total of 2 phyla, 3 classes, 8 orders, 29 families, and 3564 individuals were successfully sampled and recorded. The presence of Hydropsychidae, Baetidae, and Chironomidae with a high abundance of the families sho

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Hing, Andrea Au, and Jaime A. Salas. "Diversidad y abundancia de la quiropterofauna en la Estación Cientifica Pedro Franco Dávila, durante los meses mayo-Agosto 20215." Rev. Cient. Cien. Nat. Ambien. 10, no. 2 (2016): 52–60. https://doi.org/10.5281/zenodo.13486655.

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(Uploaded by Plazi for the Bat Literature Project) The present study was carried out in Pedro Franco Dávila Scientific Station (Palenque parish, province of Los Ríos). The aim was to evaluate the status of conservation of chiropterofauna in the remaining semideciduous forest. At night, mist nets were displayed at soil and subcanopy levels, sampling 1533 h/web, from May to August 2015; meanwhile during the day, bat refugia were searched. Abundance-range and species accumulation curves were elaborated, Shannon-Wiener and Pielou evenness diversity index were calculated; additionally, the threaten

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Hing, Andrea Au, and Jaime A. Salas. "Diversidad y abundancia de la quiropterofauna en la Estación Cientifica Pedro Franco Dávila, durante los meses mayo-Agosto 20215." Rev. Cient. Cien. Nat. Ambien. 10, no. 2 (2016): 52–60. https://doi.org/10.5281/zenodo.13486655.

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(Uploaded by Plazi for the Bat Literature Project) The present study was carried out in Pedro Franco Dávila Scientific Station (Palenque parish, province of Los Ríos). The aim was to evaluate the status of conservation of chiropterofauna in the remaining semideciduous forest. At night, mist nets were displayed at soil and subcanopy levels, sampling 1533 h/web, from May to August 2015; meanwhile during the day, bat refugia were searched. Abundance-range and species accumulation curves were elaborated, Shannon-Wiener and Pielou evenness diversity index were calculated; additionally, the threaten

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Hing, Andrea Au, and Jaime A. Salas. "Diversidad y abundancia de la quiropterofauna en la Estación Cientifica Pedro Franco Dávila, durante los meses mayo-Agosto 20215." Rev. Cient. Cien. Nat. Ambien. 10, no. 2 (2016): 52–60. https://doi.org/10.5281/zenodo.13486655.

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(Uploaded by Plazi for the Bat Literature Project) The present study was carried out in Pedro Franco Dávila Scientific Station (Palenque parish, province of Los Ríos). The aim was to evaluate the status of conservation of chiropterofauna in the remaining semideciduous forest. At night, mist nets were displayed at soil and subcanopy levels, sampling 1533 h/web, from May to August 2015; meanwhile during the day, bat refugia were searched. Abundance-range and species accumulation curves were elaborated, Shannon-Wiener and Pielou evenness diversity index were calculated; additionally, the threaten

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Hing, Andrea Au, and Jaime A. Salas. "Diversidad y abundancia de la quiropterofauna en la Estación Cientifica Pedro Franco Dávila, durante los meses mayo-Agosto 20215." Rev. Cient. Cien. Nat. Ambien. 10, no. 2 (2016): 52–60. https://doi.org/10.5281/zenodo.13486655.

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(Uploaded by Plazi for the Bat Literature Project) The present study was carried out in Pedro Franco Dávila Scientific Station (Palenque parish, province of Los Ríos). The aim was to evaluate the status of conservation of chiropterofauna in the remaining semideciduous forest. At night, mist nets were displayed at soil and subcanopy levels, sampling 1533 h/web, from May to August 2015; meanwhile during the day, bat refugia were searched. Abundance-range and species accumulation curves were elaborated, Shannon-Wiener and Pielou evenness diversity index were calculated; additionally, the threaten

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PÉREZ-VELÁZQUEZ, DANIELA, GABRIELA CASTAÑO-MENESES, ALICIA CALLEJAS-CHAVERO, and JOSÉ G. PALACIOS-VARGAS. "Mesostigmatid mite (Acari: Mesostigmata) diversity and abundance in two sites in Pedregal de San Ángel Ecological Reserve, Distrito Federal, México*." Zoosymposia 6, no. 1 (2011): 255–59. http://dx.doi.org/10.11646/zoosymposia.6.1.34.

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The Pedregal de San Ángel Ecological Reserve (REPSA) is located in the central campus of the Universidad Nacional Autónoma de México (UNAM), in México City. Diversity and abundance of edaphic mites of the order Mesostigmata were estimated in two sites of REPSA. One site had scanty vegetation, due to human alterations, and was designated as “open site” (O), whereas the other had less altered, denser vegetation, being designated as “closed site” (C). Samples of soil and litter collected during the rainy and dry seasons of 2008 were processed for the extraction of mites of that group, which were

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Luong, Nguyen Thi, Nguyen Van Quy, and Nguyen Van Hop. "Woody plants diversity and its relationship with carbon stock in the tropical moist evergreen closed forest, Dong Nai Cultural Nature Reserve." Journal of Forestry Science and Technology 8, no. 2 (2023): 128–37. http://dx.doi.org/10.55250/jo.vnuf.8.2.2023.128-137.

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This study was conducted to test the hypothesis of a statistically meaningful existence between woody plant diversity and aboveground carbon stock in the tropical moist evergreen closed forests at Dong Nai Cultural Nature Reserve. The result showed that, in total, 49 plant species of 30 families were recorded. Twenty-one threatened species were listed in Decree 84/2021/ND-CP of the Government, Vietnam Red Data Book (2007), and IUCN Red List (2022). The indicators reflecting the level of diversity were identified: Species richness (S) 15.44±2.69 species; Abundance (A) 51.68±3.42 trees; Margalef

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