scholarly journals Benthic polychaete off Tanintharyi Island, Myeik Archipelago

Bionatura ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 1692-1697
Author(s):  
Zarni Ko Ko ◽  
Hnin Pwint Htwe
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Deep Sea ◽  
Benthic Fauna ◽  
Diversity Indices ◽  
Research Vessel ◽  
Species Evenness ◽  
Ecosystem Survey ◽  
Northern Sector

The survey examined shallow to deep-sea benthic data on benthic fauna from the Myanmar coastal region's northern sector. Benthic samples were collected from 17 stations (26-1500m depth) off Taninthayi Island during the Mayanmar ecosystem survey of the R/V Dr. Fridtjof Nansen Research Vessel. Polychaete (25 taxa in total) had a higher proportion than other groups of benthic fauna. The range of species diversity and evenness were insignificantly different, but species richness differed. The highest species diversity, species evenness, and richness were showed in shallow areas (26 m depth). Keywords: Diversity indices, Polychaetes, Taninthayi Island, Myeik Archipelago.

scholarly journals Diversity of Hoverfly (Diptera: Syrphidae) Communities in Different Habitat Types in Zanjan Province, Iran

ISRN Zoology ◽  
2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Masumeh Naderloo ◽  
Shahrokh Pashaei Rad
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Rice Field ◽  
Diversity Analysis ◽  
Species Evenness ◽  
Habitat Types

The diversity of hoverfly communities was studied in four different habitat types (river side, woodland, fruit garden, and rice field) in the years of 2008 and 2009. Adult hoverflies were collected from different habitants in Zanjan province. A total of 31 species with 750 individuals of hoverflies were collected, among which Sphaerophoria scripta (Linnaeus), Eristalis arbustorum (Linnaeus) and Eristalis tenax (Linnaeus) were found to be the most abundant. Records from these four sites were used in the diversity analysis. The results indicated that river side and rice field showed the highest and lowest degree of species richness and species diversity. Also, river side and rice field showed the highest and lowest species evenness, respectively.

scholarly journals STRUKTUR KOMUNITAS IKAN TARGET DI TERUMBU KARANG PULAU HOGOW DAN PUTUS-PUTUS SULAWESI UTARA

2011 ◽  
Vol 7 (2) ◽  
pp. 60 ◽  
Author(s):  
Unstain NWJ Rembet ◽  
Mennofatria Boer ◽  
Dietriech G Bengen ◽  
Achmad Fahrudin
Keyword(s):  
Multivariate Analysis ◽  
Species Richness ◽  
Coral Reef ◽  
Species Diversity ◽  
Species Abundance ◽  
Controlling Factors ◽  
Ecological Groups ◽  
Species Evenness ◽  
Target Fish ◽  
Abundance And Diversity

ABSTRACTCommunity structure of target fishes was analyzed to understand their response to different conditions of coral reefs in several places of Hugow and Putus-Putus islands. This study focused on species abundance and diversity including Shannon-Wiener’s species diversity (H’), species richness (SR), species evenness (J’) and dominance (d) indices, respectively. A multivariate analysis was used for the classification or correspondence factorial analyses. The result recorded 4,501 individuals belonging to 52 species of target fishes. Both cluster and correspondence analyses clearly recognized 3 groups of target fish with 2 major controlling factors for the development of these 3 ecological groups, i.e. coral reef conditions and geographic position to the hydrodynamic condition.ABSTRAKStruktur komunitas ikan target dianalisis untuk melihat respon ikan target terhadap perbedaan kondisi terumbu karang di beberapa lokasi Pulau Hogow dan Putus-Putus. Penelitian ini dilakukan pada bulan Oktober 2010 dengan pengambilan data di 6 stasiun. Dalam penelitian ini telah dikaji variabel komunitas seperti kelimpahan dan keanekaragaman spesies termasuk indeks keanekaragaman spesies Shannon-Wiener (H’), indeks kekayaan spesies (SR), indeks kemerataan spesies (J’) dan indeks dominasi (d). Untuk melihat assemblage ikan target dilakukan analisis multivariat baik analisis klasifikasi maupun analisis faktorial koresponden. Dalam penelitian ini diperoleh 4501 indidu yang termasuk dalam 52 spesies ikan target. Analisis multivariat baik analisis cluster maupun analisis koresponden telah memisahkan dengan jelas 3 grup ikan target, dimana terdapat dua faktor utama pengendali pembentukan 3 grup ekologis ini yakni faktor kondisi terumbu karang dan faktor posisi lokasi terhadap kondisi hidrodinamika perairan.

scholarly journals Microbial Diversity Based on Multifractal Analysis of Metagenomes

2021 ◽  
Author(s):  
Xianhua Xie ◽  
Yuanlin Ma ◽  
Zuguo Yu ◽  
Guosheng Han
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Multifractal Analysis ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Diversity Indices ◽  
Age Difference ◽  
Chaos Game Representation ◽  
As Species ◽  
Species Diversity Indices

Species diversity in microbiome is a cutting-edge concept in metagenomic research. In this study, we propose a multifractal analysis for metagenomic research. From the chaos game representation (CGR) visualization of simulated and real metagenomes, we find that there exists self-similarity in the visualization of metagenomes. Then we compute the multifractal dimensions for simulated and real metagenomes. For simulated metagenomes, we also compute their diversity indices, such as species richness indices, Shannon’s diversity indices and Simpson’s diversity indices respectively for varying value of . Fom the Pearson correlation coefficients between their multifractal dimensions and traditional species diversity indices, we find that the correlation coefficients between the multifractal dimensions and species richness indices and Shannon diversity indices reach their maximums at respectively. The correlation coefficients between the multifractal dimensions and Simpson’s diversity indices reach their maximums at nearly. So the traditional diversity indices can be unified by the frame of multifractal analysis. These results coincided with the similar results in macrobial ecology. Finally, we apply our methods to real metagenomes of 100 infants’ gut microbiomes when they are newborn, 4 months and 12 months. Our results show that multifractal dimensions of infants’ gut microbiomes can discriminate the age difference.

scholarly journals Geographical Distribution, Biodiversity, and Species Richness of Medically Important Necrophagous Flies in Central Iran

2019 ◽  
Vol 57 (2) ◽  
pp. 377-381
Author(s):  
Ehssan Mozaffari ◽  
Abedin Saghafipour ◽  
Kourosh Arzamani ◽  
Nahid Jesri ◽  
Majid Kababian ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Similarity Index ◽  
Wiener Index ◽  
Diversity Indices ◽  
Central Iran ◽  
Calliphora Vicina ◽  
Mountainous Areas ◽  
Cross Sectional ◽  
Important Species

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 families and 15 different species. The largest collection of flies was obtained in the mountainous areas comprising 36.2% of specimens. Moreover, five forensically important species of fly were collected in this region with the potential to cause human and animal myiasis: Calliphora vicina, Lucilia sericata, Musca domestica, Wohlfahrtia nuba, and Chrysomya albiceps. There were slight differences in species richness and diversity indices in the areas. In mountainous areas, the Shannon–Wiener index and richness were maximum (H’ = 1.87, S = 13). The evenness based on the Shannon evenness index in the mountainous areas was 0.728 and 0.719 in desert areas, whereas it was the highest (0.764) in the semidesert areas. Moreover, high values of the Jaccard similarity index were observed in captured necrophagous fly species in all the areas. The necrophagous fly fauna and species diversity indices were high because of an increase in the evenness. In general, some well-known forensically important species of flies were collected that proved the potential of myiasis occurrence in this area.

scholarly journals INDEKS KEANEKARAGAMAN JENIS IKAN DEMERSAL DI PERAIRAN TARAKAN

2015 ◽  
Vol 6 (1) ◽  
pp. 47 ◽  
Author(s):  
Suprapto Suprapto
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Diversity Indices ◽  
Demersal Fish ◽  
Management Policy ◽  
Fishing Ground ◽  
Trawl Fishing ◽  
Data Capacity ◽  
Species Diversity Indices ◽  
Evenness Indices

Perairan Tarakan termasuk daerah penangkapan sumber daya ikan demersal dan udang cukup potensial di KalimantanUtara. Tingginya tingkat eksploitasi ikan demersal dengan menggunakan trawlmenyebabkan keragaman jenisnya rendah. Penelitian ikan demersal dilakukan di perairan Tarakan pada bulanMei,Agustus dan Nopember 2012. Tujuan penelitian adalah untuk memperoleh indeks keanekaragaman jenis ikan demersal. Data spesies ikan demersal dikumpulkan dari hasil tangkapan jaring trawl yang dioperasikan oleh kapal motor 20GT dengan metode sapuan area. Hasil penelitian menunjukkan bahwa jumlah taksa ikan demersal sebanyak 86 spesies yang tergolong kedalam45 famili. Komposisi jenis hasil tangkapan trawl didominasi oleh famili Leiognathidae (ikan petek), Sciaenidae (ikan gulama), Harpadontidae (ikan nomei),Apogonidae (ikan serinding) danMullidae (ikan bijinangka). Status keanekaragaman jenis termasuk dalamkategori sedang dengan indeks “Shanon-Wiener” (H’)berkisar antara 1,7-2,5 sedangkan indeks kekayaan “Margalef” (R1 ) berkisar antara 7-8. Penyebaran spesies ikan demersal bersifat sedang dengan indeks kemerataan jenis (E) rata-rata sebesra 0,5.Kelimpahan ikan demersal tidak ada yang dominan, ditunjukkan oleh nilai indeks kemerataan jenis “Pielou” (E) rata-rata sebesar 0,4.Tarakan and adjacent waters is one of potentially fishing ground of demersal fish resources in north Kalimantan. High exploitation by trawler tend to decreased of biodiversity of demersal fish in this area. Research has been conducted in the waters of Tarakan duringMay, August and November 2012. The aim of this research is to get species diversity indices of demersal fish, which is expected to be useful as one of the data capacity for sustainable fisheries management policy. Data obtained by using trawl fishing gear with a sweept area method.The results showed that demersal fish species richness 86 species, belonging to 45 families. Dominant family are Leiognathidae, Sciaenidae, Harpadontidae, Apogonidae andMullidae. Result of analysis indicate that species diversity in Tarakan waters in the medium category. Status of biodiversity consist of: range value diversityindices “Shanon-Wiener” (H’) was 1.7 to 2.5; species richness indices of “Margalef” (R1 ) are between 7-8; evenness indices of “Pielou” (E 1) was 0,5 and dominant indices “Pielou” (E) an average of 0.4.

scholarly journals Abundance and diversity of aquatic insects in two water bodies of Chittagong university campus

2015 ◽  
Vol 42 (1) ◽  
pp. 19-33
Author(s):  
Munira Nasiruddin ◽  
Mohammad Ali Azadi ◽  
Md Selim Reza
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Aquatic Insects ◽  
Water Bodies ◽  
Species Evenness ◽  
University Campus ◽  
Abundance And Diversity

Abundance and diversity of aquatic insects was studied in two water bodies, (a pond and a lake) of Chittagong University campus during October 2009 to September 2010. A total of 4406 insects belonging to 32 genera, under 20 families and 6 orders were recorded. In both the water bodies, the representatives of the orders Hemiptera and Odonata were the most abundant groups. During the study period highest abundance of the total insects was recorded in November 2009 and the lowest in July 2010. Abundance of insects was comparatively higher in the pond habitat than in the lake. The Quotient of Similarity (QS) of the insects between the two water bodies was found to be the highest in October 2009 and lowest in July 2010. Species diversity, species richness and species evenness values of the lake were higher than that of the pond. Hydrophilus sp. and Sphaerodema sp. were the most dominant insects in the pond, while Chironomous sp. and Gerris sp. in the lake.Bangladesh J. Zool. 42(1): 19-33, 2014

scholarly journals Odonate abundance and diversity in four selective spots of Chittagong University campus

2018 ◽  
Vol 4 (1) ◽  
pp. 55-62
Author(s):  
M Nasiruddin ◽  
A Barua
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Seasonal Fluctuation ◽  
Species Evenness ◽  
University Campus ◽  
Ecological Conditions ◽  
The Family ◽  
Abundance And Diversity

The abundance and diversity of odonate fauna were studied in four selective spots of Chittagong University Campus, Chittagong, Bangladesh from August’2016 to July’2017. A total of 928 individuals of odonates under three families was collected during the study period from the four sampling sites. Out of 25 species identified one belonged to the family Gomphidae, 13 belonged to family Libellulidae and 11 belonged to family Coenagriidae. The abundance of odonate species was highest in July’17 (13.04%) and was lowest in December’16 (4.96%). Spot 2 was a hotspot for odonates as highest number (370) was collected from this spot. A total of 196, 188 and 174 individuals were collected from Spot 4, Spot 3 and Spot 1, respectively. The members of Libellulidae (472) were dominant followed by Coenagriidae (406) and lastly Gomphidae (50). Highest species richness (SR), species diversity (H′) and species evenness (J′) values were observed in the months of May’17 (1.56±0.08), May’17 (1.29±0.08) and December’16 (0.96±0.03), respectively. But lowest such values were observed in December’16 (0.96±0.05), November’16 (0.90±0.02) and May’17 (0.81±0.05), respectively. Amongst the spots, highest SR, H′ and J′, values were observed in Spot 4 (1.40±0.10), Spot 2 (1.22±0.05) and Spot 1 (0.93±0.02), respectively, whereas, lowest such values were observed in Spot 1 (1.02±0.08), Spot 1 (1.01±0.04) and Spot 4 (0.82±0.02), respectively. Ecological conditions and seasonal fluctuation had great impact on the abundance and diversity of odonates.J. Biodivers. Conserv. Bioresour. Manag. 2018, 4(1): 55-62

Regeneration Success and Plant Species Diversity of Allegheny Hardwood Stands After Roundup Application and Shelterwood Cutting

1994 ◽  
Vol 11 (4) ◽  
pp. 109-116 ◽  
Author(s):  
Stephen B. Horsley
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Plant Species ◽  
Negative Impact ◽  
Woody Species ◽  
Diversity Indices ◽  
Species Group ◽  
Plant Species Diversity ◽  
Herbaceous Species ◽  
Species Groups

Abstract The presence of desirable regeneration and plant species diversity was studied in five Allegheny hardwood stands before and for 7 yr after application of Roundup herbicide and shelterwood cutting to remove interfering understories of hayscented and New York fern, striped maple, and beech and to establish desirable hardwood regeneration. In each of five 20 ac stands, 10 ac were sprayed with 1 lb ai (active ingredient)/ac of Roundup in August 1979; the remaining 10 ac were unsprayed. The entire 20 ac stand received a shelterwood seed cut the following winter. On treated plots, fern was reduced from 57% stocking before treatment to 7% 1 yr after treatment; striped maple and beech stocking was reduced by 16% during the same time. By the fourth year after treatment, regeneration stocking of desirable hardwood species had doubled on treated plots but remained unchanged on untreated control plots. Species diversity was measured by species richness, three diversity indices--Berger-Parker, Margalef and Shannon, and index-free diversity ordering. Neither the herbicide treatment nor the shelterwood seed cut had a statistically significant effect on species richness of either woody species or herbaceous species groups. Nor was there a significant effect of treatments on woody species diversity as measured by the three diversity indices. Index-free diversity ordering showed. (1) a trend toward increase in less common species on Roundup-treated areas, and (2) the diversity of herbaceous species groups was higher in all 7 yr after treatment with Roundup. Values of the three diversity indices were higher for herbaceous species on Roundup-treated subplots for 2 to 7 yr after treatment. Much of this increase resulted from germination of seed bank grasses, sedges, and Rubus spp. With the qualification that long-term and current browsing by deer has impoverished the flora of the Allegheny hardwood forest, diminishing potential treatment effects, the study demonstrated that Roundup treatment aided desirable regeneration establishment, did not have a negative impact on woody species or herbaceous species group diversity, and may have increased diversity of herbaceous species. North. J. Appl. For. 11(4): 109-116.

scholarly journals Does Altitude Effect on Species Composition and Diversity on Himalayan Rangeland?

2017 ◽  
Vol 1 ◽  
pp. 26-30
Author(s):  
Dilkumar Limbu ◽  
Madan Koirala ◽  
Zhanhuan Shang
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Altitudinal Gradient ◽  
Diversity Index ◽  
Grazing Intensity ◽  
Floristic Composition ◽  
Diversity Indices ◽  
Altitude Effect ◽  
Wiener Diversity Index ◽  
The Impact

Himalayan rangelands have diverse floristic composition and important ecological services. The floristic diversity and composition play an important role in grassland ecosystem regulation. It is different in altitudinal gradient due to grazing intensity, climatic condition and topography. To reveal the vegetation composition values, this work was conducted on August and September 2011 in Tinjure-Milke mountain ridge, Guphapokhari, Nepal. In the present study we have described the impact of altitude on the species richness, species diversity and dispersion behavior of different plants (grasses) in Himalayan rangeland. The values of community indices were observed to be: RD (0.09 to 49.57), RF (3.57 to 14.71), RA (0.23 to 47.59), IVI (3.89 to 111.87), Shannan-Wiener diversity index (1.09 to 2.23) and species diversity evenness (0.12 to 0.19) at the study area, MilkeJaljale, eastern Nepal. Similarly, Species richness (R) value of 8.87 to 11.86 and Simpson dominant index value of 0.12 to 0.42 were observed. All diversity indices were reversed to altitudinal gradient higher the altitudes lower the values. Species richness of all plants showed a unimodal relationship with altitude. Similarly, negative correlation of density and species richness with altitude and slope was recorded.

scholarly journals Keanekaragaman Serangga Air di Sungai Pajowa Kabupaten Minahasa, Sulawesi Utara

Jurnal MIPA ◽  
2013 ◽  
Vol 2 (2) ◽  
pp. 73 ◽  
Author(s):  
Gladyes V. Leba ◽  
Roni Koneri ◽  
Adelfia Papu
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Food Chain ◽  
Aquatic Insects ◽  
Life Cycles ◽  
Species Evenness ◽  
North Sulawesi ◽  
Surber Sampler

Serangga air merupakan kelompok Arthropoda yang sebagian siklushidupnya berada di perairan. Serangga ini berperan penting dalam rantaimakanan pada suatu ekosistem perairan. Penelitian ini bertujuan untukmenganalisis kelimpahan, kekayaan, keanekaragaman dan kemerataaanspesies serangga air di Sungai Pajowa, Kabupaten Minahasa, SulawesiUtara. Pengambilan sampel menggunakan surber sampler dan handcollection. Jumlah serangga air yang ditemukan sebanyak 22 spesies, 14famili dan 5 ordo. Spesies yang paling banyak ditemukan adalah Gerrisremigis, sedangkan ordo yang memiliki spesies paling banyak adalahEphemeroptera. Kelimpahan dan kekayaan spesies serangga air tertinggiterdapat pada bagian tengah aliran sungai, sedangkan keanekaragamandan kemerataan spesies tertinggi di bagian hulu sungai. Kelimpahan,kekayaaan dan keanekaragaman spesies serangga air berbeda nyataantar stasiun pengamatan, sedangkan kemerataan spesies tidakmenunjukkan perbedaan yang nyata.Arthropods are a group of aquatic insects whose life cycles are partlyin the water. These insects play an important role in the food chain in anaquatic ecosystem. This research is aimed to analyze the abundance,richness, diversity and evenness of species of insects in the river waterPajowa, Minahasa regency, North Sulawesi. Surber sampler and handcollection are used in Sampling. Number of aquatic insects found as manyas 22 species, 14 families and 5 orders. The most commonly foundspecies is Gerris remigis, while orders that have the most species areEphemeroptera. Abundance and species richness of aquatic insects ishighest in the middle of the river, while the highest species diversity andevenness in the upper reaches of the river. Abundance, species richnessand diversity of aquatic insects were significantly different between thestations of observation, whereas species evenness did not showsignificant differences.

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