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Journal articles on the topic 'Shannon evenness'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Efendi, Siska Chiko, Yaherwandi Yaherwandi, Ade Noferta, and Aditya Muhammad. "Keanekaragaman Coccinellidae Predator Pada Beberapa Ekosistem Perkebunan di Kabupaten Dharmasraya." Biosfer: Jurnal Tadris Biologi 10, no. 2 (2019): 157–68. http://dx.doi.org/10.24042/biosfer.v10i2.5558.

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The objectives of this research were to study the species diversity and to determine the dominant species of lady bird beetle predators in high land plantation ecosystem in West Sumatera. The samples were taken by hand collection and sweep net. The data of species diversity were analyzed using Shannon-Wiener index, evenness of species were analyzed by Simpson index, and dominant species using important value index. The results showed that there were 91 individuals predator found which consisted of 7 species. The highest species diversity (1.74) and evenness (0.89) were found in Pulau Punjung.

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Fort, Hugo. "Productivity vs. Evenness in the U.S. Financial Market: A Business Ecosystem Perspective." Entropy 25, no. 7 (2023): 1029. http://dx.doi.org/10.3390/e25071029.

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This paper starts by presenting an empirical finding in the U.S. stock market: Between 2001 and 2021, high productivity was achieved when the Shannon evenness—measuring the inverse of concentration—dropped. Conversely, when the Shannon evenness soared, productivity plunged. The same inverse relationship between evenness and productivity has been observed in several ecosystems. This suggests explaining this result by adopting the business ecosystem perspective, i.e., regarding the tangle of interactions between companies as an ecological network, in which companies play the role of species. A u

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3

Bajagain, Santish, Santosh Pokhrel, Shishila Baniya, Aavas Pradhan, Surakchya Paudel, and Ishwar Datt Joshi. "Avifaunal Diversity of Institute of Forestry Complex, Hetauda Metropolis, Nepal." Forestry: Journal of Institute of Forestry, Nepal 17 (December 23, 2020): 83–101. http://dx.doi.org/10.3126/forestry.v17i0.33624.

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Avifaunal diversity is the measure of species diversity via species richness and evenness. To this aim, avifaunal survey was conducted in the Institute of Forestry Complex, Hetauda from November 2017 to June 2018. Using line transect and point count methods, 132 species of birds were recorded, representing 15 orders and 44 families. Three species of these birds are in IUCN Red List while 90, 27 and 15 species are residential, visitor and migrant respectively. Higher Shannon diversity index (4.47) and Margalef index (18.78) indicate marked diversity and richness of bird species. A high value ca

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4

Darshan R and Jayalaxmi Narayan Hegde. "Diversity of Hymenopteran Parasitoids in different Crop Ecosystems." International Journal of Environment and Climate Change 14, no. 3 (2024): 585–607. http://dx.doi.org/10.9734/ijecc/2024/v14i34067.

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Surveys were carried out in different districts viz., Shivamogga, Davangere and Chitradurga of Karnataka to collect and document hymenopteran parasitoids parasitizing insect pests attacking different crop ecosystems. A total of 42 hymenopteran parasitoids species represented by 33 genera belonged 12 families were documented from a collection of 1379 specimens from different stages viz., egg, larva, pupa and adult stage of host insects from different host plants viz., rice, maize, cabbage, cotton, coconut, brinjal, cashew, crape jasmine, tobacco, field bean, soybean, arecanut, cocoa, okra and p

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Pallabi Das and V. P. Uniyal. "Diversity of bees in two crops in an agroforestry ecosystem in Kangsabati South Forest Division, Purulia, West Bengal, India." Journal of Threatened Taxa 15, no. 3 (2023): 22889–93. http://dx.doi.org/10.11609/jott.8273.15.3.22889-22893.

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The investigation study assesses the diversity of bees in Brinjal Solanum melongena L. and Ridge Gourd Luffa acutangula L. crop field from agroforestry ecosystem in South Kangsabati Forest Division, India. The study was carried out in May 2021 to May 2022 that based on transect, focal observation and pan trap samplings. A total of 1,085 individuals were identified during the field work, belonging to three family seven genera (Apis, Tetragonula, Xylocopa, Ceratina, Amegelia, Nomia, and Megachile) and seventeen species, the non Apis bees (63.78%) were most abundant than Apis bees (36.22%). In br

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Strong, W. L. "Biased richness and evenness relationships within Shannon–Wiener index values." Ecological Indicators 67 (August 2016): 703–13. http://dx.doi.org/10.1016/j.ecolind.2016.03.043.

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7

T N, Anusha, Nischitha R, and Shivanna M B. "Diversity of Mycoflora in Root and Rhizosphere Regions of Alloteropsis Cimicina (L.) Stapf." Shanlax International Journal of Arts, Science and Humanities 8, S1-Feb (2021): 31–35. http://dx.doi.org/10.34293/sijash.v8is1-feb.3928.

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Endophytic fungi described as the internal mycota of living plants. The present study is an attempt to document mycoflora diversity of root, rhizosphere, bulk soil of grass Alloteropsis cimicina (L.) Stapf a less known species from North East India in Bhadra reserve forest region in two different seasons. Isolation, fungal community from collected samples by Moist blotter method, Potato dextrose agar (PDA) method, Malt extract agar (MEA) methodStatistical analysis were done and the mean data by Simpson Diversity Index Shannon Evenness Shannon Diversity Index(H1 ) Simpson Evenness, Colonization

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Dagaonkar, Amita, and M. M. Prakash. "Diversity indices of phytoplankton at Munj sagar talab (Dhar, Madhya pradesh, India)." Environment Conservation Journal 12, no. 3 (2011): 29–32. http://dx.doi.org/10.36953/ecj.2011.120306.

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Phytoplankton is the significant formal natural occupier of all water bodies. They play an important role in the biosynthesis of organic material. Being an index of trophic status phytoplankton reflects the overall environmental condition of the system and its potentiality. Present investigation was carried out for a period of twenty four month to study the diversity indices. Simpson’s Index of Dominance ranged from 0.0441 to 0.0952. Shannon-Wiener Diversity (H) index ranged from 2.6298 to 3.2112.273. Evenness Index ranged from 0.5593 to 0.9808 during the study period. Keywords: Diversity inde

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9

Sen, Somdipta, Aritra Biswas, and Aniruddha Banerji. "Analysis of Avian Diversity at Chintamoni Kar Bird Sanctuary: An Urban Forest Perspective." UTTAR PRADESH JOURNAL OF ZOOLOGY 44, no. 12 (2023): 7–15. http://dx.doi.org/10.56557/upjoz/2023/v44i123528.

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Chintamoni Kar Bird Sanctuary (CKBS) is an urban forest located on the southern fringes of Kolkata. The objective of our study was to document and analyze the diversity of the avian population in CKBS. The line transect method was used and avian diversity, species richness and evenness were analyzed using Shannon Diversity Index, Shannon Equitability Index, relative diversity and relative abundance. Our study recorded 37 bird species belonging to 9 orders and 23 families with most species being recorded from Order Passeriformes followed by Piciformes and Ciconiiformes. The species were well di

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NAYAK, Ananya, and Sunanda SASMAL. "Post-monsoon bird assemblages in rural and riverine environments of Northern Howrah, West Bengal, India: A spatio-temporal approach." Notulae Scientia Biologicae 14, no. 1 (2022): 11078. http://dx.doi.org/10.15835/nsb14111078.

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The primary goal of this study was to evaluate avian assemblages in four different land types (Wetland Associated Bamboo Forest, Agricultural Land, Wetland Associated Agricultural Land and Riverside Agricultural Land) located in a flood prone area of South Bengal during the post monsoon months of 2020. Surveys were conducted for 48 days in a land type and time dependent manner to explore the changes in abundance, dominance, evenness and species richness. A total of 18654 observations belonging to 16 orders, 44 families, 70 genera and 81 species were recorded. Despite having lowest total count

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Sarkar, Tapan. "Diversity and conservation status of malacofauna from the river Teesta,West Bengal, India." Asian Journal of Conservation Biology 11, no. 2 (2022): 240–46. http://dx.doi.org/10.53562/ajcb.75122.

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A survey on malacofauna in the river Teesta from March 2014 to February 2016 was done by using caste net of mesh size 0.5 mm. A total of 9 species belonging to 7 families were reported. All thesespecies are under Least Concern (LC) category. One invasive species Physellaacuta also reported from the river Teesta. Of the 9 species, 7 are edible molluscs. Diversity indices and PCA were done by PAST software. Number of taxa, dominance index, Shannon diversity index, evenness index and Margalef’s richness index were ranged from3-7, 0.123-0.50, 0.868-2.149, 0.5659-0.9531 and 0.8049-2.25respectively.

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Eva Mamahit, Juliet Merry. "Diversity and Abundance of Insects on Pineapple (Ananas comosus (L.) Merr.) Plantation at Bolaang Mongondow District." International Journal of ChemTech Research 13, no. 2 (2020): 61–68. http://dx.doi.org/10.20902//ijctr.2019.130208.

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Bolaang Mongondow District is one of the centers of pineapple production in Indonesia that reside in province North Sulawesi, Indonesia. This research was aimed to know diversity and abundance of insect in pineapple plantation, detect species evenness of insect in to type agroecosystem of pineapple with polyculture and monoculture systems. This research was carried out at pineapple plantation on Lobong village, Bolaang Mongondow District. Insect diversity was observation in pineapple plants will be done by using pith fall traps. The trapping was put in two land research locations that have dif

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Bílek, L., J. Remeš, O. Švec, and D. Zahradník. "On the way to continuous cover forest at middle elevations – the question of forest structure and specific site characteristics." Journal of Forest Science 59, No. 10 (2013): 391–97. http://dx.doi.org/10.17221/57/2013-jfs.

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The transformation process of even-aged forest stands to irregular forest stands on waterlogged sites after 20 years effort was analysed. Data from two 1-ha PRP was analysed with special focus on structural (Shannon Evenness Index, Simpson Index and Gini Index) and species (Shannon Evenness Index and Simpson Index) diversity. Different development on study plots confirmed that the highest structural diversity is not often compatible with the concept of species diversity. On PRP 1 high diameter differentiation has led to lower values of species diversity, while on PRP 2 rather moderate diameter

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14

Olaoti-Laaro, S. O., D. M. Taiwo, K. A. Adeniji, et al. "Tree Species Diversity and Distribution in the Natural Forest of Onigambari Forest Reserve, Oyo State, Nigeria." Journal of Applied Sciences and Environmental Management 25, no. 5 (2021): 829–34. http://dx.doi.org/10.4314/jasem.v25i5.22.

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Anthropogenic activities has caused depletion of majority of Nigeria forest reserves, reducing forest lands to agricultural lands and grasslands. These prompted this study to consider the diversity of species as well as their species composition in the forest in February 2021. Four sub-plots were established in a cluster with an area of 50m by 50m, with 20m distance between each plots and 10m as edge effect. Twenty five tree species belonging to fifteen families were found in the study site. Family Malvaceae was the most represented. Triplochiton scleroxylon recorded the highest relative impor

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Eliye, Yahyapour, Shayanmehr Masoumeh, Miri Behzad, and Vafaei Shoushtari Reza. "A study on the relative abundance and biodiversity indicators of Springtails (Hexapoda: Collembola) in two ecosystems in Mazandaran province (Iran)." Journal of Insect Biodiversity and Systematics 8, no. 1 (2022): 131–44. https://doi.org/10.52547/jibs.8.1.131.

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In this study the biodiversity and relative abundance of Collembola was evaluated in two different ecosystems, citrus orchard and forest in Mazandaran province, Iran. Samples were carried out during 2016 and 2017. Species richness, biodiversity and the indices of similarity were calculated. The results of T-Test showed that in two years (2016 and 2017), the values of Shannon-Wiener diversity and Simpson species diversity index were significantly different between sampling areas (Pvalue<0.05), but the values of Margalef richness and Pielou evenness index were not significantly (Pvalue˃0.05).

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Ramadhanti, Cita, Aris Subagio, and Jani Master. "Diversity and Abundance of Rhopalocera (Lepidoptera) in Batutegi Protected Forest, Sumatra, Indonesia." Berkala Ilmiah Biologi 13, no. 3 (2022): 19–24. http://dx.doi.org/10.22146/bib.v13i3.5104.

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Batutegi protected forest has the potential to be butterflies habitat due to the possibility of its richness of host and feed plants. The research was conducted to analyze butterflies diversity and abundance in three different types of vegetation which are shrubs, forest, and Way Sekampung watershed. The methods that used are Shannon-Wiener’s Diversity Index (H’), Simpson’s dominance index (D), and Pielou’s Evenness Index (E). Analysis shows the butterfly diversity up to 3.034; dominance index up to 0.079; and evenness up to 0.823. These results attributed to the highly potential of butterfly

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17

Pokharel, Neeta, Bishal Bhandari, Mahamad Sayab Miya, and Nikita Phuyal. "Avifaunal diversity inside and outside protected area: A case of Sundarijal Forest and Changunarayan Forest, Kathmandu Valley, Nepal." Nepalese Journal of Zoology 7, no. 1 (2023): 36–47. http://dx.doi.org/10.3126/njz.v7i1.56309.

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This study aimed to compare the diversity of birds between protected and non–protected areas that are similar in climatic and geographical features. The study was carried out in three different habitat types (Forest, Agricultural land and Wetland of protected Sundarijal and Non-protected Changunarayan. Field data were collected using a “Point Count Approach” in transects which were laid in different habitat types (Forest, Agricultural land & Wetland). Shannon-Wiener and Margalef Diversity Indices were used to calculate the diversity of birds and Pielou’s Evenness was used to calculate the

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18

Ibrahim, A., J. Sudarso, and Sulistiono. "Macrozoobenthic Community Structure in the Kemayungan-Linduk Waters, Banten Bay." IOP Conference Series: Earth and Environmental Science 1083, no. 1 (2022): 012050. http://dx.doi.org/10.1088/1755-1315/1083/1/012050.

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Abstract The objective of this study was to investigate the macrozoobenthic community structure in Kemayungan-Linduk waters, Banten Bay. This study was conducted for three months from February to April 2021. Van Veen grab was used to gather macrozoobenthic samples in triplicate at six sites. Environmental parameters such as depth, Secchi depth, water temperature, turbidity, pH, dissolved oxygen, and salinity were also measured. According to our findings, Gastropods, Bivalvia, Malacostraca, Polychaeta, Clitellata, Insecta, and Ophiuroidea were found in the Kemayungan-Linduk waters. Macrozoobent

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MEMBERE, O. AND NWABUEZE E. "ABUNDANCE AND DIVERSITY OF INSECTS IN BORIKIRI MANGROVE ECOSYSTEM IN NIGER DELTA, NIGERIA." AFRICAN LIFE SCIENCE JOURNAL 1, no. 1 (2019): 9–24. https://doi.org/10.5098281/zenodo.3457.

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The diversity of insects in Borikiri mangrove habitat along the Bonny River was investigated for three months (April–June, 2017). The study was carried out to establish a basic understanding of the diversity pattern of insect assemblages in the area and to understand the relationship between the surrounding mangrove ecosystem and associated insect fauna. Two mangrove plant species were investigated: Rhizophora and Avicennia species. A total of 6 insect orders, Diptera, Coleoptera, Hymenoptera, Homoptera, Orthoptera, Odonata, 24 families and 42 species were identified and recorded. This s

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Stocker, GC, GL Unwin, and PW West. "Measures of Richness, Evenness and Diversity in Tropical Rainforest." Australian Journal of Botany 33, no. 2 (1985): 131. http://dx.doi.org/10.1071/bt9850131.

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The number of species represented in vegetation (its richness) and the way in which individuals are distributed amongst the species (its evenness) are often combined into a single index to represent both these characteristics (its diversity). Many different indices to represent richness, evenness and diversity have been proposed from time to time. The present work examines empirically the suitability, for ecological studies, of a number of these measures using data from tree species of tropical rainforest of north Queensland and Barro Colorado Island, Panama. It is found that all of the richne

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Xue, Dong, Xiang Dong Huang, and Lian Xue. "Soil Microbial Community Structure in Tree Peony (Paeonia suffruticosa) Garden Based on PLFA Analysis." Applied Mechanics and Materials 675-677 (October 2014): 82–85. http://dx.doi.org/10.4028/www.scientific.net/amm.675-677.82.

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Understanding the chronological change in soil microbial community structure of tree peony garden ecosystem is important from ecological, environmental, and management perspectives. Soil samples were collected from three tree peony garden systems (5-, 12-, and 25-year-old tree peony gardens), and adjacent wasteland at Luoyang, Henan Province of China. Soil microbial community structure was analyzed by phospholipid fatty acid (PLFA) method. The bacterial and actinomycete PLFAs increased from the wasteland to 5-year-old tree peony garden and then decreased from the 5- to 25-year-old tree peony g

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Manu, Minodora, Raluca Ioana Băncilă, and Marilena Onete. "Effect of Grazing Management on Predator Soil Mite Communities (Acari: Mesotigmata) in Some Subalpine Grasslands from the Făgăraş Mountains—Romania." Insects 14, no. 7 (2023): 626. http://dx.doi.org/10.3390/insects14070626.

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For the first time in Romania, a complex study was conducted on soil mite communities from two types of managed grasslands: ungrazed and intensively grazed. The study was accomplished in August 2018, in the Făgăraş Mountains. Within the soil mite communities (Mesostigmata), 30 species were identified, from 80 soil samples. The following population parameters were investigated: species richness, numerical abundance, dominance, Shannon index of diversity, evenness and equitability. Eight environmental variables were also measured: soil and air humidity; soil and air temperature; soil pH; resista

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Shamsi, S., and M. Zafrin. "Diversity and seasonal variation of endophytic fungi associated with bark, stem and leaf of agar plant (Aquilaria malaccensis Lam.)." Journal of Biodiversity Conservation and Bioresource Management 9, no. 2 (2023): 65–74. http://dx.doi.org/10.3329/jbcbm.v9i2.70069.

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The diversity of endophytic fungi was isolated from the bark, stem and leaf of agar plant in monsoon and winter seasons at different locations of Dhaka and Habiganj districts. A total of 25 fungal isolates were found in monsoon and 22 in winter season. The highest diversity value was found in the bark of location 2 in monsoon according to Shannon diversity index and in the stem of location 1 in winter according to Simpson diversity index. The lowest value was found in the leaf and stem of location 1 and 4, respectively. The evenness of endophytic fungi was highest in the stem of location 1 and

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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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Dr Shivali Kharoliwal and Dr Surabhi Shrivastava. "A Rapid Assessment of Alpha Diversity by Use of Shannon Diversity Index-A Statistical Tool." International Journal of Scientific Research in Science and Technology 12, no. 3 (2025): 1378–84. https://doi.org/10.32628/ijsrst25123154.

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The Shannon index is an information statistic index, which means it assumes all species are represented in a sample and that they are randomly sampled. Species richness, evenness, and diversity are used to compare different populations(Magurran, A. E. 2004.). This index quantifies the diversity of a community by considering both the number of species (species richness) and the evenness of their distribution(Species richness).Biodiversity indices can help prioritize conservation efforts by identifying areas of high biodiversity importance and species in need of protection(Simpson E.H. 1949) .Th

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Paul, Adoyi Michael, and John Ubelejit Alfred. "Tree Species Diversity in Makurdi Zoological Garden, Benue State, Nigeria." UMYU Scientifica 3, no. 3 (2024): 1–7. http://dx.doi.org/10.56919/usci.2433.001.

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Study’s Excerpt/Novelty This study focuses on ecological assessment of tree species diversity in the Makurdi Zoological Garden, employing indices such as the Shannon Weigner evenness and diversity indices and the Menhinick index to evaluate species richness and distribution. The findings highlight a moderate level of species diversity (diversity index of 2.06) and an uneven distribution of tree species, with Danieli oliveri showing the highest frequency and Ceasalpiniodeae the highest relative abundance. The study's detailed analysis of species richness and abundance underscores the impact of

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Nurhandani, Pebi, Marheni, Irda Safni, and Setia Sari Girsang. "Diversity of Insects in Shallot (Allium ascalonicum L) Plantations at Various Altitudes." Jurnal Pertanian Tropik 5, no. 2 (2018): 215–22. http://dx.doi.org/10.32734/jpt.v5i2.2994.

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Recently the improvement of shallot seed quality using true shallot seed has been developed. This research was aimed to know diversity of insects and the role of insects on the cultivation of shallot seeds in various altitudes. This research was conducted in three different districts (Deli Serdang, Simalungun and Toba Samosir districts) in Plant Pests and Diseases Laboratory, Faculty of Agriculture, University of North Sumatra, Medan from July 2017 until January 2018. This research used four different insect traps (sweep net, pitfall trap, hand picking, and yellow trap), and repeated for six t

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G.N., Nwokwu, and Sanderson R. "COMPARATIVE STUDY OF ECOLOGICAL SURVEY TECHNIQUES ON INVERTEBRATE." Continental J. Agricultural Science 3 (August 7, 2009): 15–20. https://doi.org/10.5281/zenodo.839628.

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The objective of this study was to determine appropriate methodologies in different habitats in order to identify invertebrates using identification keys. The study was carried out in the Close House in the University of Newcastle Experimental Farm. The methods employed during the study were Pitfall trapping, Sweep netting, Blo-Vac and Beating trays. The skills of using the identification keys were developed in order to identify the groups of insects present in different habitats at least to the level of their order. Major invertebrate orders such as Hemiptera, Diptera, Hymenoptera and Coleopt

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Isnawati, Lisa Lisdiana, Mahanani Tri Asri, and Guntur Trimulyono. "BIODIVERSITY OF CELLULOLYTIC BACTERIA ISOLATED FROM FERMETODEGE FOR RUMINANTS." BIOTROPIA 31, no. 2 (2024): 192–201. http://dx.doi.org/10.11598/btb.2024.31.2.1904.

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ARTICLE HIGLIGHTS- Fermetodege as a source of cellulolytic bacteria that degrade cellulosic materials.- Enhances ruminant feed by improving palatability and digestibility.- Utilizes water hyacinth, reducing invasive plant spread and supporting ecosystems.- Bioprospecting reveals new bacteria for effective fermentation starter development.ABSTRACTFermetodege is a name of fermented ruminant feed produced from free heavy metals water hyacinth, rice bran, and corn cobs. Its quality, as well as the fermentation process, are affected by numerous factors, such as the diversity, evenness, and dominanc

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Mozaffari, Ehssan, Abedin Saghafipour, Kourosh Arzamani, Nahid Jesri, Majid Kababian, and Seyed Ahmad Hashemi. "Geographical Distribution, Biodiversity, and Species Richness of Medically Important Necrophagous Flies in Central Iran." Journal of Medical Entomology 57, no. 2 (2019): 377–81. http://dx.doi.org/10.1093/jme/tjz203.

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Abstract There have been some investigations carried out about necrophagous flies and their biodiversity indices in Iran. In the present study, the species composition of flies, their richness, and biodiversity were investigated in central Iran. In a cross-sectional study, specimens were collected monthly in three different climate areas of Qom Province. Species diversity, species richness, and species evenness were calculated to estimate the species biodiversity of flies. In total, 7,291 flies were collected and identified using valid identification keys that classified flies into four famili

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Rad, J. Eshaghi, A. Motallebpour, and A. Alijanpour. "Effect of physiographic factors on woody species diversity in oak forests (case study: Sardasht forest -Iran)." Journal of Bio-Science 23 (July 17, 2018): 19–27. http://dx.doi.org/10.3329/jbs.v23i0.37464.

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Research on species diversity in different gradients of altitudes, aspect and slope is attempting to understand the interactions of vegetation and the non-living environment. The aim of this study was to examine the impact of altitude, slope and aspect variation on the woody species diversity in the Oak forests of Zagros (northern of Iran). 178 samples were taken by using of transect method with a fixed length of 50 m. Altitude, slope, aspect, woody species and diameter at breast height of all trees was recorded in each transect. Margalef richness index, Shannon and Simpson diversity indices a

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Avianto, Yovi, Amir Noviyanto, Muhamad Fajar Sidiq, Hernowo Hernowo, and Ananta Bayu Pratama. "Reforestation Impact: Contrasting Carbon Stock and Biodiversity of Clove in Monoculture and Mixed Gardens Over 25 Years." Jurnal Biologi Tropis 24, no. 3 (2024): 333–40. http://dx.doi.org/10.29303/jbt.v24i3.7253.

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Tropical forests, vital for absorbing CO2 and maintaining ecosystem balance, are threatened by deforestation and unsustainable agricultural practices. Mixed garden or clove agroforestry systems, which combine clove cultivation with other crops, offer a sustainable alternative to traditional monoculture practices. This study aims to assess the biomass potential, carbon storage, and biodiversity in clove monoculture and mixed garden systems. The research was conducted in February 2024 at smallholder clove plantations and secondary forests in Pesaren, Sukorejo, Kendal, Central Java. The study inv

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Jaramillo-Jaramillo, Ana S., J. T. McClure, Henrik Stryhn, Kapil Tahlan, and Javier Sanchez. "Effects of storage conditions on the microbiota of fecal samples collected from dairy cattle." PLOS ONE 19, no. 8 (2024): e0308571. http://dx.doi.org/10.1371/journal.pone.0308571.

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Microbiota analyses are key to understanding the bacterial communities within dairy cattle, but the impact of different storage conditions on these analyses remains unclear. This study sought to examine the effects of freezing at -80°C immediately after collection, refrigeration at 4°C for three days and seven days and absolute ethanol preservation on the microbiota diversity of pooled fecal samples from dairy cattle. Examining 16S rRNA gene sequences, alpha (Shannon, Pielou evenness, observed features and Faith PD indices) and beta (Bray-Curtis, βw and Weighted UniFrac) diversity were assesse

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Siska Aprilia Kaulika and Imam Safir Alwan Nurza. "Diversity, Evenness, and Abundance of Epiphytic Ferns in The Area Around Villa Silma, Cilember Sub-District, Bogor Regency." Risenologi 6, no. 2 (2021): 43–47. http://dx.doi.org/10.47028/j.risenologi.2021.62.192.

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This research aimed to find out the diversity, evenness, and distribution abundance of epiphytic ferns scattered in the area around Villa Silma, Cilember District, Bogor Regency. This research used a purposive sampling method by taking samples as the data determined by determining the characteristics of the epiphytic ferns found. Collecting data in this research exploratively by exploring all epiphytic ferns found in the area and observations on the morphology of epiphytic ferns. Data were analyzed through the diversity index using the Shannon-Wiener index, distribution of abundance using the

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Yoo, Jae-Won, Yong-Woo Lee, Jennifer L. Ruesink, et al. "Environmental quality of Korean coasts as determined by modified Shannon–Wiener evenness proportion." Environmental Monitoring and Assessment 170, no. 1-4 (2009): 141–57. http://dx.doi.org/10.1007/s10661-009-1222-0.

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Shamsil Arafeen, Mohammad, Jarin Tasnim, M. A. Habib Siam, et al. "Fish Diversity and Socio-Economic Status of Gomti River Fishermen at Cumilla Sadar Bangladesh." Bangladesh Journal of Zoology 52, no. 2 (2024): 185–99. http://dx.doi.org/10.3329/bjz.v52i2.77274.

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The Gomti River originates in eastern Tripura, India, and flows westward into Bangladesh, supporting a variety of fish species along its course. This study focused on evaluating the fish diversity and the socio-economic status of fishermen in the Gomti River at Cumilla Sadar Upazila, Cumilla, Bangladesh. Researchers identified 37 fish species from 5 orders and 15 families, with most species belonging to the Cypriniformes and Siluriformes orders. According to the IUCN Bangladesh (2015), 9 species were classified as near threatened, 3 as endangered, and 4 as vulnerable. The data included metrics

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Jahangeer, Muhammad, Muhammad Siddique Awan, and Riaz Aziz Minhas. "Assessment of butterflies diversity, and distribution in Ghamot National Park, Western Himalaya, Neelum valley, Pakistan." World Journal of Biology and Biotechnology 9, no. 2 (2024): 21. http://dx.doi.org/10.33865/wjb.009.02.1160.

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Biodiversity measures, species richness and species evenness. Species richness means the number of species present in designated area whereas evenness stands for relative abundance of each species. Butterflies are very important economically. They feed on nectar from flowers by using proboscis. Butterflies act as excellent bio indicator of health of natural ecosystem. The fauna in the study area lacks comprehensive documentation hence there has been no previous assessment of butterfly biodiversity. The study was conducted to estimate species richness, species evenness, and species diversity th

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Campanino, Finella M., Stephanie K. Archer, Jillian C. Tupitza, Cassandra N. Glaspie, and Megan K. La Peyre. "Comparison of two benthic assemblage sampling gears for use on intertidal oyster reefs in Louisiana." PeerJ 13 (April 28, 2025): e19346. https://doi.org/10.7717/peerj.19346.

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Background Estuarine biodiversity plays a vital role in supporting ecosystem functions yet remains threatened by climate change and anthropogenic activity. Tracking and identifying estuarine biodiversity trends helps management ensure long-term provisions of human and environmental benefits by contributing to the estimation of habitat loss and the monitoring of restoration and conservation progress. However, results obtained using different sampling gears and different biodiversity metrics may lead researchers to reach different conclusions, which can lead to uncertainty in the actual state of

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Bobkova, V. V., S. N. Konovalov, and M. T. Upadyshev. "Taxonomic structure of tissue endophytic bacterial microbiome in clonal apple rootstock grown on sod-podzolic soils with variant properties." Horticulture and viticulture, no. 6 (December 30, 2021): 36–44. http://dx.doi.org/10.31676/0235-2591-2021-6-36-44.

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The taxonomic structure of tissue endophytic bacterial microbiome was comparatively studied in microplants (undifferentiated explant callus tissues, passage 25) and 5-year clonal apple rootstocks 57-490 and 54-118 cultured from corresponding tissues (passage 1) on sod-podzolic soils with variant granulometry, chemical, physical and physicochemical properties. Proteobacteria (91.6 %) predominated in vitro tissues among other endophytic bacterial phyla in rootstock 57-490, while Proteobacteria (52.5 %) and Firmicutes (47.4 %) — in rootstock 54-118. The endophytic Firmicutes ratio vs. in vitro ti

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Setyawan, Yendra Pratama, Wakhid Wakhid, and Suhadi Suhadi. "The Denser Canopy of Mangrove Drives the Structure of Insect Communities." Tropical Life Sciences Research 31, no. 3 (2020): 77–90. http://dx.doi.org/10.21315/tlsr2020.31.3.6.

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Mangrove restoration in Trenggalek, East Java has resulted an age variation of mangrove ecosystem. Diverse species of insects predominantly found in mangroves were collected using yellow pan traps, swipe nets and by direct picking from three different sites. This research was conducted from April until August 2015. There are 9,181 individual insects associated with mangroves comprised of 42 species from 31 families and eight orders. The first site or the 15 years old mangrove (66.22% canopy cover) indicated the highest Shannon diversity index at 2.54, Evenness index of 0.32 and Margalef richne

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Yuni Wulandari, Dwi, Niken TM Pratiwi, Fitri Nur Rizqi, Inna Puspa Ayu, and Aliati Iswantari. "Struktur Komunitas Plankton dan Penilaian Kualitas Air Waduk Jatigede, Sumedang, Jawa Barat." Jurnal Biologi Indonesia 19, no. 1 (2023): 35–42. http://dx.doi.org/10.47349/jbi/19012023/205.

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Jatigede Reservoir is a man-made lake from the impounding of Cimanuk River water. The research aims to analyze the water quality of Jatigede Reservoir related to the community structure of plankton. Samples were collected at seven sampling sites in February to April 2021. The Shannon-winner diversity index (H), Evenness index (E) and Simpson dominance index (C) were used to determine stability status. The pollution index was used to calculate the pollution in the waters. The research found that there were 33 species belonging to five groups, including Chlorophyceae, Euglenophyceae, Cyanophycea

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Umar Paputungan, Martina Langi, Hardiana Fujiadisti Paputungan, and Wa Nini. "Analysis of fauna diversity on the recovery area of PT JRBM-Gold Mining in East Bolaang Mongondow Regency, North Sulawesi Province of Indonesia." Open Access Research Journal of Life Sciences 9, no. 2 (2025): 001–11. https://doi.org/10.53022/oarjls.2025.9.2.0028.

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The PT JRBM-Gold Mining has ended operations and is currently in the post-mining revegetation stage according to the contract agreement with the government. The purpose of this study was to analyse the level of diversity of wild animals that thrive in and around PT JRBM-Gold Mining from the results of environmental monitoring during 2024. In collecting data, the surveyor covered five transects with a total distance of 2.5 km with an average of 0.5 km/transect. Each transect was observed twice in the morning and repeated in the afternoon by the surveyor assisted by PT JRBM employees. The fauna

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Miranda-García, María L., Andrés Muñoz-Pedreros, and Heraldo V. Norambuena. "Waterbird assemblages of inland wetlands in Chile: A meta-analysis." Nature Conservation 45 (December 15, 2021): 41–61. http://dx.doi.org/10.3897/natureconservation.45.74062.

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Chile has a large number of wetlands that offer a wide variety of refuges and food to waterbird assemblages. This research hypothesises that these assemblages differ according to the structural characteristics of each type of inland wetland. The object is to identify the structure of these assemblages, evaluating their richness, alpha α diversity and some ecological characteristics, taxonomic structures and trophic guilds. We performed a meta-analysis by submitting pre-selected articles to multivariate reliability analysis. The selected articles were used to characterise the assemblages by alp

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Reinhardt, Theresa, and Ramon G. Leon. "Extractable and Germinable Seedbank Methods Provide Different Quantifications of Weed Communities." Weed Science 66, no. 6 (2018): 715–20. http://dx.doi.org/10.1017/wsc.2018.56.

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AbstractSeedbank sampling and quantification methods vary in their ability to describe weed diversity and density, so proper method selection is critical for studying weed communities. The germinable seedbank (GSB) method is commonly preferred over extractable seedbank method (ESB), because the latter is more time-consuming. However, these two methods have only been compared using a few weed species and a relatively small number of samples. A total of 204 weed seedbank samples were used to compare both methods for weed density, richness, evenness, and Shannon-Weiner diversity using a split-sam

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Kamal, Eni, Yuspardianto, Dwieke Putri Wulandari, Fitriyani, and Amelia Sriwahyuni Lubis. "Biodiversity of Mangrove Brachyuran Crabs of Family Ocypodidae and Sesarmidae in Koto XI Tarusan District, West Sumatera, Indonesia." HAYATI Journal of Biosciences 31, no. 3 (2024): 507–16. http://dx.doi.org/10.4308/hjb.31.3.507-516.

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The Mangrove ecosystem is an ecosystem that is around the edge of the coast and many organisms live in this ecosystem, one of them is crabs. The crabs that are often found are deposit crabs from the Ocypodidae and Sesarmidae families that act as balancers in the mangrove ecosystem. This study aimed to analyze species, diversity, evenness, and dominance in the mangrove vegetation area of Koto XI Tarusan District, West Sumatera, Indonesia. The method used is the descriptive method. The biodiversity of brachyuran crabs’ families, Ocypodidae and Sesarmidae, was analyzed with the Shannon-Wiener ind

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Miranda-García, María L., Andrés Muñoz-Pedreros, and Heraldo V. Norambuena. "Waterbird assemblages of inland wetlands in Chile: A meta-analysis." Nature Conservation 45 (December 15, 2021): 41–61. https://doi.org/10.3897/natureconservation.45.74062.

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Chile has a large number of wetlands that offer a wide variety of refuges and food to waterbird assemblages. This research hypothesises that these assemblages differ according to the structural characteristics of each type of inland wetland. The object is to identify the structure of these assemblages, evaluating their richness, alpha α diversity and some ecological characteristics, taxonomic structures and trophic guilds. We performed a meta-analysis by submitting pre-selected articles to multivariate reliability analysis. The selected articles were used to characterise the assemblages by alp

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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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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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Haque, Md Mozammal, Abu Sayed Muhammad Sharif, Md Kawser Ahmed, et al. "Distribution and Diversity of Macrobenthos in Sangu River, Bangladesh." Dhaka University Journal of Earth and Environmental Sciences 9, no. 2 (2021): 27–34. http://dx.doi.org/10.3329/dujees.v9i2.55087.

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This study was conducted to understand the macrobenthos distribution and abundance in Sangu River to monitor the aquatic pollution level. Both surface and sub-surface water and benthic sediments were collected from three stations of the Sangu River. A few indices viz. Shannon-wiener, Simpson, Margalef’s and Evenness were used to estimate the macrobenthic assemblages. In this study, a total of 11 major taxa comprising total 870 macobenthic species were identified. Shannon-wiener index was maximum (1.58) at lower part (LP) which indicated moderate to heavily pollute aquatic environment of the Sa

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Murtilaksono, Aditya, Ratna Presanthi, Sri Andini Lestari, and Muh Adiwena. "Pengaruh Kehadiran Gulma pada Tanaman Sawi (Brassica juncea L.) Terhadap sebelum dan setelah Pemberian Pupuk Limbah Udang." Agriprima : Journal of Applied Agricultural Sciences 7, no. 1 (2023): 72–78. http://dx.doi.org/10.25047/agriprima.v7i1.487.

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Keberadaan gulma dipengaruhi oleh jenis pupuk yang diberikan pada tanaman budidaya. Setiap jenis pupuk memiliki kandungan yang berbeda sehingga berpengaruh terhadap spesies gulma yang tumbuh. Agar dapat mengetahui spesies gulma yang tumbuh perlu dilakukan identifikasi pada lahan budidaya. Penelitian dilakukan bulan Juni – Agustus 2021 di Kebun pertanian Kelompok Tani Sinar Harapan, Kota Tarakan Provinsi Kalimantan Utara. Metode penelitian yaitu metode sampling acak. Parameter digunakan yaitu nama gulma dan jumlah gulma. Hasil analisis vegetasi gulma di lahan sawi kemudian diolah untuk menghitu

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