scholarly journals Assessing spider community structure in a beech forest: Effects of sampling method

2000 ◽  
Vol 97 (3) ◽  
pp. 369-375 ◽  
Author(s):  
Klaus HOVEMEYER ◽  
Gabriele STIPPICH
Keyword(s):  
Community Structure ◽  
Sampling Method ◽  
Beech Forest ◽  
Spider Community

scholarly journals Struktur Komunitas Fitoplankton di Kolam Bekas Pertambangan Batubara Desa Kampung Baru Kecamatan Cempaka

BIOSCIENTIAE ◽  
2021 ◽  
Vol 17 (2) ◽  
pp. 37
Author(s):  
Sukoco Sukoco ◽  
Gunawan Gunawan ◽  
Muhamat Muhamat
Keyword(s):  
Community Structure ◽  
Coal Mining ◽  
Sampling Method ◽  
Diversity Index ◽  
Pool Analysis ◽  
Fertility Rate ◽  
The State ◽  
Purposive Sampling ◽  
Phytoplankton Communities ◽  
Average Abundance

This study aims to determine the structure of phytoplankton communities in the pool are former coal mining Desa Kampung Baru Kecamatan Cempaka which include abundance, diversity, uniformity and dominance. Phytoplankton samples taken in two pools with a purposive sampling method with a three-point shooting at each pond. Sampling was performed three times. Phylum of phytoplankton were identified in both pools as much as 2 phylum (Chloropyta and Chrysopita) with 17 genera. Average abundance of phytoplankton in the first pool of 7174 ind / liter and 6873 ind / liter in the second pool. The average diversity index of phytoplankton in the first pool of 1.540 and 1.621 in the second pool. Average uniformity index of phytoplankton in the first pool of 0622 and 0.623 in the second pool. The average index of phytoplankton dominance in the first pool of 0271 and 0250 in the second pool. Analysis of community structure (abundance, diversity, uniformity and dominance) shows the condition of the two ponds in the state is quite stable and capable of supporting life inside the phytoplankton. Where the pool in the fertility rate is the level of contamination is, the conditions included in the category of individuals spread more evenly and there are no species that dominate other species in the extreme.

Spruce monoculture establishment affects functional traits of soil microarthropod communities

Biologia ◽  
2013 ◽  
Vol 68 (3) ◽  
Author(s):  
Jitka Farská ◽  
Kristýna Prejzková ◽  
Josef Rusek
Keyword(s):  
Community Structure ◽  
Functional Traits ◽  
Trophic Structure ◽  
Soil Fauna ◽  
Beech Forest ◽  
Functional Approach ◽  
Beech Stand ◽  
Response To Environmental Change ◽  
Soil Microarthropod ◽  
South Bohemia

AbstractStructure and density of soil microarthropod communities (Oribatida and Collembola) were studied in one natural beech forest and one spruce monoculture planted on a former beech stand in South Bohemia (Czech Republic). The spruce monoculture establishment increased microarthropod densities (93,000 ind. m−2 in the natural beech forest vs. 400,540 ind. m−2 in the spruce monoculture for Oribatida; 66,360 ind. m−2 in the natural beech forest vs. 136,360 ind. m−2 in the spruce monoculture for Collembola); additionally, it changed greatly the community structure in terms of species composition and functional traits. In the spruce monoculture, groups susceptible to disturbance were suppressed. The oribatid trophic structure changed as well with opportunistic herbifungivorous species increasing in the monoculture at the expense of fungivorous species. Similarly, hemiedaphic collembolans increased in the monoculture at the expense of euedaphic species. We conclude that the “functional approach” seems to be fruitful in revealing soil fauna response to environmental change.

scholarly journals Uncoupling of microbial community structure and function in decomposing litter across beech forest ecosystems in Central Europe

2014 ◽  
Vol 4 (1) ◽  
Author(s):  
Witoon Purahong ◽  
Michael Schloter ◽  
Marek J. Pecyna ◽  
Danuta Kapturska ◽  
Veronika Däumlich ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Central Europe ◽  
Microbial Community Structure ◽  
Forest Ecosystems ◽  
Beech Forest ◽  
Structure And Function ◽  
And Function

Molluscs Diversity in Coastal Ecosystem of South Biak, Papua

2017 ◽  
Vol 2 (1) ◽  
pp. 25 ◽  
Author(s):  
Ludi Parwadani Aji ◽  
Andriani Widyastuti
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Sampling Method ◽  
Diversity Index ◽  
Similarity Index ◽  
Coastal Areas ◽  
Seagrass Beds ◽  
Simpson Index ◽  
Transect Line ◽  
Evenness Index

Coastal areas of Biak Island consist of three major ecosystems: the mangrove, seagrass beds, and coral reefs where a variety of molluscs live. Mollusc diversity in South Biak waters was investigated in September 2011. The observation was conducted at 4 locations, i.e. Paray, Ambroben, Yenures, and Sorido with 2 stations at each location. The study aimed to obtain information on the diversity and community structure of the benthic molluscs (gastropods and bivalves) on the coastal areas of South Biak waters. Sampling method applied was quadrate-transect line in intertidal areas from inshore to offshore. The molluscs (epifauna and infauna) found inside the quadrate-transect were counted and identified. The result showed high benthic mollusc diversity with a total of 94 species, consisting of 75 species of gastropods and 19 species of bivalves. The most widespread gastropod found in all stations was Nassarius sp., while for bivalves was Tellina sp. The highest value of diversity index (H) was 2.96 found in Paray 1 and the lowest was 0.58 in Yenures 1. The Evenness index (E) and Simpson index (D) ranged from 0.27 to 0.96 and from 0.06 to 0.72 respectively. Species richness (d) ranged from 2.89 to 6.84 and similarity index from 3.90 to 42.40.  

scholarly journals Short Communication: Silba adipata (Diptera: Lonchaeidae) parasitoids on cayenne pepper (Capsicum frutescens) in Bali, Indonesia

2021 ◽  
Vol 22 (9) ◽  
Author(s):  
Ketut Ayu Yuliadhi ◽  
I WAYAN SUPARTHA ◽  
NI NENGAH DARMIATI ◽  
ALPREDO BANGUN ◽  
I KADEK WISMA YUDHA ◽  
...  
Keyword(s):  
Community Structure ◽  
Sampling Method ◽  
Short Communication ◽  
Diversity Index ◽  
Capsicum Frutescens ◽  
Parasitoid Species ◽  
Parasitization Rate ◽  
Diachasmimorpha Longicaudata ◽  
Low Diversity ◽  
Location Point

Abstract. Yuliadhi KA, Supartha IW, Darmiati NN, Bangun A, Yudha IKW, Utama IWEK, Wiradana PA. 2021. Silba adipata (Diptera: Lonchaeidae) parasitoids on cayenne pepper (Capsicum frutescens) in Bali, Indonesia. Biodiversitas 22: 3929-3935. The black fig fly (Silba adipata) is newly emerging pests that attack cayenne pepper (Capsicum frutescens L.) plants in Bali Province, Indonesia. This study aimed to determine the parasitoid type, community structure, distribution, and parasitization rate of the parasitoids of S. adipata on cayenne pepper in Bali. The sampling method employed in this study involves purposive sampling techniques on 100-150 pieces of cayenne pepper infested with S. adipata at each location point, with the emerging parasitoids identified morphologically. Three types of parasitoid species were associated with S. adipata, which include Asobara japonica Belokobylskij, Fopius arisanus (Sonan), and Diachasmimorpha longicaudata (Ashmead). The parasitoid community structure associated with S. adipata had a low abundance index, low diversity index, and a moderate dominance index. Based on the distribution of the three parasitoids, D. longicaudata is distributed evenly in Bali, whereas F. arisanus was not found in Jembrana . Conversely, A. japonica was only found in Badung, Bangli, Gianyar, and Klungkung. As summary, D. laungicaudata had the highest parasitization rate compared to the F. arisanus and A. japonica. D. longicaudata is a potential parasitoid, which can be studied for the future biological control of S. adipata.

scholarly journals Struktur Komunitas Landak Laut di Padang Lamun Pulau Kodingareng, Kepulauan Spermonde

2021 ◽  
Vol 24 (1) ◽  
pp. 63-70
Author(s):  
Wilma Moka ◽  
Dwi Fajriyati Inaku ◽  
Muhammad Rais
Keyword(s):  
Community Structure ◽  
Species Composition ◽  
Sampling Method ◽  
Marine Organism ◽  
Sea Urchins ◽  
Diversity Index ◽  
Seagrass Beds ◽  
Ecological Value ◽  
Tripneustes Gratilla ◽  
Diadema Setosum

Sea urchins is marine organism from Phylum Echinoderms which have high economic and ecological value. Therefore, we need data on the current condition of sea urchins, especially those in the Spermonde Islands. Through this research, it is hoped that the community structure and distribution of sea urchins in Kodingareng Lompo Island, Spermonde Islands can be known. The sampling method used was quadrant transects measuring 5x5 meters on 4 plots in the seagrass area on Kodingareng Lompo Island. The data analysis used was species composition, density, relative density, diversity index, and uniformity index. The results obtained show that there are three species of sea urchins, namely Diadema setosum, Mespilia globulus, and Tripneustes gratilla, basen on morphology identification. Diadema setosum is species with the highest species composition value, namely 92%. The density value (0.017 individuals / m2) and the diversity of sea urchins (H '<1) in the seagrass beds at Kodingareng Island are classified as low. It is hoped that the data obtained from this research can become a reference for the management of biological resources in the Spermonde Islands in the future. Landak laut merupakan salah satu kelas dari Filum Echinodermata yang memiliki nilai ekonomis dan ekologis yang cukup tinggi. Gonad landak laut telah sejak lama dikonsumsi di berbagai negara dunia, dan bahkan sekarang cangkangnya banyak dijadikan souvenir. Karena itu diperlukan data kondisi terkini landak laut, khususnya yang ada di Kepulauan Spermonde. Melalui penelitian ini diharapkan dapat diketahui struktur komunitas maupun sebaran landak laut yang ada di Padang Lamun Pulau Kodingareng Lompo, Kepulauan Spermonde. Metode sampling yang digunakan adalah transek kuadran ukuran 5x5 meter pada 4 plot pada daerah padang lamun di Pulau Kodingareng Lompo. Analisis data yang digunakan adalah komposisi jenis, kepadatan, kepadatan relatif, indeks keanekaragaman, dan indeks keseragaman. Hasil yang didapatkan memperlihatkan bahwa terdapat tiga genus landak laut, yaitu Diadema, Mespilia, dan Tripneustes. Diadema sp. merupakan genus dengan nilai komposisi jenis tertinggi yaitu 92%. Nilai kepadatan (0,017 individu/m2) dan keanekaragaman landak laut (H’<1) di padang lamun Pulau Kodingareng tergolong rendah. Data yang didapatkan dari penelitian ini diharapkan dapat menjadi bahan acuan untuk pengelolaan sumberdaya hayati di Kepulauan Spermonde ke depannya.

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