scholarly journals The species composition of rotifers in three hydroelectric reservoirs of western highlands, Central Vietnam

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Duong Quang Hung ◽  
Phan Nhat Truong ◽  
Vo Van Minh ◽  
Tran Nguyen Quynh Anh ◽  
Trinh Dang Mau
Keyword(s):  
Species Composition ◽  
Similarity Index ◽  
Species Accumulation Curve ◽  
Jaccard Similarity ◽  
Hydroelectric Reservoirs ◽  
Accumulation Curve ◽  
Central Vietnam ◽  
Freshwater Bodies ◽  
High Level ◽  
Richness Estimators

The rotifer fauna in three hydroelectric reservoirs of western highlands, central Vietnam were studied. Among a total of 63 identified species and subspecies, beloging to 23 genera in 15 families, Brachionidae was the most diverse family with 15 taxa recorded (23.81%) followed by Lecanidae (14 taxa, 22.22%), and Synchaetidae (8 taxa, 12.7%). Species accumulation curve and species richness estimators suggested a relatively high level of biodiversity of rotifera assemblages in the studied area. Besides, results on species composition of rotifera community in this study were compared to those of other freshwater bodies in Vietnam using Jaccard similarity index. In particular, the highest similarity was found between reservoirs in western highlands and Phu Ninh lake, Quang Nam Province while the largest difference in species composition was observed between western highlands and Bau Thiem lake, Thua Thien Hue Province. 

scholarly journals SPECIES COMPOSITION OF FISH FAUNA IN THE COASTAL WATERS OF QUANG NGAI PROVINCE

2018 ◽  
Vol 18 (2) ◽  
pp. 166-177
Author(s):  
Le Thi Thu Thao ◽  
Vo Van Quang ◽  
Nguyen Phi Uy Vu
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Coastal Waters ◽  
Similarity Index ◽  
Fish Fauna ◽  
Sampling Location ◽  
Number Of Species ◽  
Central Vietnam ◽  
Group 2 ◽  
Group 1

Three surveys were carried out in May, August and December 2014 at 7 sampling location to determine species composition of fish fauna in the coastal waters of Quang Ngai province (the Central Vietnam). A total number of 178 species of fishes were identified belonging to 125 genera, 68 families and 13 orders. Analysis of community structure of fish fauna showed that Perciformes order was the most popular, making up 71.9%; Tetraodontiformes (8.4%); Pleuronectiformes (5.6%). Serranidae family was the most abundant with 14 species, making up 7.9% of the total number of species; Carangidae: 12 species (6.7%); Lutjanidae, Gobiidae had the same number of species with 9 species (5.1%); Scombridae: 7 species (3.9%); Soleidae: 6 species (3.4%); Haemulidae, Mullidae, Tetraodontidae: 5 species (2.8%);... Cluster analysing based on the Bray-Curtis similarity index of nine fish faunas (Thai Binh, Son Tra, Thu Bon, Quang Nam, Nha Phu-Binh Cang, Ben Tre and Tra Vinh) showed that fish composition of the coastal estuaries of Tra Vinh and Ben Tre had the highest similarity (80%), subsequently fish fauna of Quang Ngai had similarity with that of Nha Phu-Binh Cang (39%), Quang Ngai and Quang Nam (42%), Quang Nam and Nha Phu-Binh Cang (41%), Quang Nam and Son Tra (38%), Thai Binh and Ben Tre (37%), Quang Ngai and Son Tra (36%). The result was also classified into two distinct groups of 7 fish faunas: Group 1-Tra Vinh, Ben Tre and Thai Binh; group 2-Quang Ngai, Quang Nam, Nha Phu-Binh Cang and Son Tra. The species richness (Margalef’s index) of Quang Ngai (34.2) was less abundant than other areas, the highest species richness belonged to Tra Vinh (38.2), Thai Binh (38.0), Quang Nam (37.8), Nha Phu-Binh Cang (35.1), Son Tra (30.9), Ben Tre (29.4). The diversity of species composition according to the level taxa in each region showed the characteristic of each fish fauna.

scholarly journals Sphingidae (Lepidoptera) ocorrentes no Leste do Maranhão, Brasil

2018 ◽  
Vol 11 (3) ◽  
pp. 209-215
Author(s):  
Joseleide Teixeira Câmara ◽  
Juliana Raquel Bomfim da Rocha ◽  
Surama Pereira
Keyword(s):  
Secondary Forest ◽  
Light Trap ◽  
Eastern Region ◽  
Forest Fragments ◽  
Species Accumulation Curve ◽  
Accumulation Curve ◽  
Fauna Composition ◽  
Original Vegetation ◽  
Richness Estimators ◽  
High Diversity

Resumo. Os esfingídeos são considerados um grupo bioindicador, com espécies indicadoras de continuidade da vegetação original e outras indicadoras de perturbação. O objetivo do presente estudo é realizar análise faunística das comunidades de Sphingidae em dois fragmentos de mata secundária na Região Leste maranhense. Foram realizadas coletas mensais em fragmentos de mata secundária, nos municípios de Caxias e Codó, entre fevereiro/2015 e outubro/2016. Os espécimes foram obtidos por meio de armadilha luminosa. Foram calculadas a frequência relativa, abundância, constância, dominância, diversidade, estimativas de riqueza e obteve-se a curva de acúmulo de espécies. Foram obtidos 254 espécimes de 33 espécies, distribuídas em 16 gêneros. No fragmento localizado em Caxias (Povoado Chapada-PC), três espécies são predominantes e sete espécies são raras; em Codó (Fazenda Santa Rita-FSR), duas espécies são predominantes e cinco são raras. O fragmento FSR expressa maior diversidade que o PC, no entanto, os estimadores de riqueza apontam para menor possibilidade de acréscimo no número de espécies da comunidade da FSR. As comunidades estudadas possuem maior similaridade com outras comunidades mais distantes que entre si. Os dados comprovam a heterogeneidade da composição faunística existente no Maranhão denota alta diversidade, mas também alta fragilidade.Sphingidae (Lepidoptera) Occurrents in The East of Maranhão, BrazilAbstract. The hawkmoths is considered a bioindicator group with indicator species of continuity of the original vegetation and other indicators of disturbance. The objective of this study is analysis of faunal Sphingidae communities in two secondary forest fragments in the Eastern Region Maranhão. Monthly collections were carried out in fragments of secondary forest, in the municipalities of Caxias and Codó, between February/2015 and October/2016. The specimens were obtained by light trap. Relative frequency, abundance, constancy, dominance, diversity, richness estimates were calculated and the species accumulation curve was obtained. 254 specimens were obtained from 33 species, distributed in 16 genera. In the fragment located in Caxias (Pavoado Chapada-PC), three species are predominant and seven species are rare; in Codó (Fazenda Santa Rita-FSR), two species are predominant and five are rare. The FSR fragment expressed greater diversity than the PC, however, the richness estimators indicate less likely to increase in the number of species of the FSR community. The communities studied have greater similarity with other communities more distant than each other. The data prove the heterogeneity of the existing fauna composition in Maranhão, denoting high diversity but high fragility.

scholarly journals Anuran fauna of the Parque Estadual Carlos Botelho - Núcleo Sete Barras, southeastern Brazil: species composition, use of breeding sites, and seasonal patterns of breeding activity

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jaime Bertoluci ◽  
Henrique Oliveira Sawakuchi ◽  
Carolina Ortiz ◽  
Ricardo Augusto Brassaloti ◽  
José Wagner Ribeiro-Júnior ◽  
...  
Keyword(s):  
Visual Search ◽  
Species Composition ◽  
Southeastern Brazil ◽  
Seasonal Patterns ◽  
Sampling Effort ◽  
Species Accumulation Curve ◽  
Breeding Sites ◽  
Breeding Activity ◽  
Accumulation Curve ◽  
Species Accumulation

Abstract: The goal of this work was to study the species composition, the use of breeding sites, and the seasonal patterns of breeding activity of the anuran fauna from Parque Estadual Carlos Botelho - Núcleo Sete Barras, state of São Paulo, southeastern Brazil. Fieldwork was carried out from September 2005 to October 2007 through two main methods: active visual search inside a 10 ha- permanent plot and aural and visual search in seven previously selected aquatic breeding habitats. Species richness was related to the sampling effort by means of species accumulation curve and through non-parametric estimators. Thirty-three species distributed in 12 families were recorded, from which 69% are endemic to the Atlantic Forest. Trachycephalus mesophaeus represents a new record for the park. Cycloramphus lutzorum is included as Data Deficient in the IUCN list. The species accumulation curve did not stabilize, showing some tendency to rise. The use of breeding sites by 20 species was compared using cluster analysis, which revealed two major groups: the first with five species (two habitat generalists and three stream specialists) and the second composed by the other species (with different reproductive modes associated with flooded environments). The breeding period of most species was associated to the rainy season (October to February), and only Scinax hayii showed continuous breeding activity during the entire period of study.

scholarly journals Birds in nourishment of eagle-owl (Bubo bubo L.) in Ciscaucasia region

2016 ◽  
Vol 71 (1) ◽  
pp. 27-31
Author(s):  
L. Gorobets ◽  
V. Yanenko
Keyword(s):  
Species Composition ◽  
Similarity Index ◽  
Birds Of Prey ◽  
Bubo Bubo ◽  
Tawny Owl ◽  
Eagle Owl ◽  
High Level ◽  
Owl Pellets ◽  
Sørensen Index

The article deals with the results of research into species composition of birds whose remains were discovered in Eagle-owl pellets in Ciscaucasia region. The materials collected in three locations of the region have very low similarity index which doesn't exceed 0,1 (Sørensen index). This fact indicates a high level of Eagle-owl polyphagia. During the research, the birds of prey (ex. Goshawk and a Rough-legged buzzard) as well as rare Tawny owl and Long-eared owl were identified. A part of birds in the nourishment of eagle-owls increases during autumnal migrations. The poultry is extremely rare found among Eagle-owl prey.

Carabidae of Barnaul city parks: ecological characteristics and species composition

2018 ◽  
Vol 8 (2) ◽  
pp. 348-353
Author(s):  
E. A. Kuchina ◽  
N. D. Ovcharenko ◽  
L. D. Vasileva
Keyword(s):  
Species Composition ◽  
Diversity Index ◽  
Similarity Index ◽  
Life Forms ◽  
Ground Beetles ◽  
Forest Steppe ◽  
Ecological Groups ◽  
Dominant Group ◽  
Species Diversity Index ◽  
Steppe Species

<p>Anthropogenic impact on the population of ground beetles leads to a change in their numbers, structure of dominance, density, species composition, spectrum of life forms. This makes the beetles Carabidae a convenient and informative bioindicator of the ecological state of biocenoses. The material for this work was the Carabidae collections conducted in June-August 2016-2017 in the park zone of different regions of Barnaul, differing in location, area, hydrological regime, vegetation cover, purpose and anthropogenic load. When processing the material, the quantitative, species and generic composition of the carabidae was determined, calculations were made for such indicators as the Berger-Parker dominance index, the Shannon species diversity index (Hs), and the Jacquard species similarity index. The fauna (Coleoptera, Carabidae) of the park zone of Barnaul is represented by 55 species belonging to 20 genera. The dominant group is represented by species belonging to steppe, forest and polyzonal groups. Forest-steppe species of ground beetles as dominants have not been identified in any of the investigated territories. The greatest variety of ecological groups was noted on the territory of the Yubileyny рark, which is explained by the presence of zones with various microclimatic conditions, the presence of a birch grove that flows through the park with the Pivovarka River, and a wide log in the park. Registered species belong to eight groups of life forms belonging to two classes - zoophagous and myxophytophagous. On the numerical and species abundance, zoophages predominate. The spectrum of life forms corresponds to the zonal spectrum characteristic of the forest-steppe zone.</p><p> </p>

Quantitative analysis of a deep-water bryozoan collection from the Hebridean continental slope

2001 ◽  
Vol 81 (6) ◽  
pp. 987-993 ◽  
Author(s):  
David J. Hughes
Keyword(s):  
Quantitative Analysis ◽  
Continental Slope ◽  
Deep Water ◽  
The Other ◽  
Depth Range ◽  
Species Accumulation Curve ◽  
North West ◽  
Colony Density ◽  
Accumulation Curve ◽  
Total Fauna

Bryozoans were collected from nine stations between 569 and 1278 m depth on the Hebridean continental slope north-west of Lewis. The 21 species recorded from 1544 colonies included three species new to the British fauna. The bryozoan fauna, growing on pebbles, cobbles and small boulders, was dominated by species with encrusting, spot or ribbon-like colony morphologies. The few erect species were rare. Colony density on available rock substrata declined from 569 to 855 m, but was high at 1278 m, where the nodular species Turbicellepora boreale occurred on pebbles as small as 1 cm diameter. Cyclostomates made up >90% of the colonies in the shallowest sample and were present in lower numbers to 855 m. None were recorded at 1278 m. In the 569–855 m depth range, diversity and evenness were lowest at 569 m but relatively constant at the other stations. A species accumulation curve suggests that the 20 species recorded is a good estimate of the total fauna in this depth range.

scholarly journals Genetic structure and gene flow of Eugenia dysenterica natural populations

2005 ◽  
Vol 40 (10) ◽  
pp. 975-980 ◽  
Author(s):  
Maria Imaculada Zucchi ◽  
José Baldin Pinheiro ◽  
Lázaro José Chaves ◽  
Alexandre Siqueira Guedes Coelho ◽  
Mansuêmia Alves Couto ◽  
...  
Keyword(s):  
Gene Flow ◽  
Genetic Variability ◽  
Pearson Correlation ◽  
Natural Populations ◽  
Similarity Index ◽  
Genetic Distances ◽  
Strong Positive Correlation ◽  
Randomly Amplified Polymorphic Dna ◽  
Jaccard Similarity ◽  
Eugenia Dysenterica

This study was carried out to assess the genetic variability of ten "cagaita" tree (Eugenia dysenterica) populations in Southeastern Goiás. Fifty-four randomly amplified polymorphic DNA (RAPD) loci were used to characterize the population genetic variability, using the analysis of molecular variance (AMOVA). A phiST value of 0.2703 was obtained, showing that 27.03% and 72.97% of the genetic variability is present among and within populations, respectively. The Pearson correlation coefficient (r) among the genetic distances matrix (1 - Jaccard similarity index) and the geographic distances were estimated, and a strong positive correlation was detected. Results suggest that these populations are differentiating through a stochastic process, with restricted and geographic distribution dependent gene flow.

scholarly journals Species composition and growth performance of mangrove forest at the coast of Tanah Merah, East Nusa Tenggara

2020 ◽  
Vol 21 (12) ◽  
Author(s):  
Ronggo Sadono ◽  
DJOKO SOEPRIJADI ◽  
ARI SUSANTI ◽  
PANDU YUDHA ADI PUTRA WIRABUANA ◽  
Jeriels Matatula
Keyword(s):  
Species Composition ◽  
Growth Performance ◽  
Mangrove Forest ◽  
Life Stage ◽  
Average Height ◽  
Wood Biomass ◽  
Timber Volume ◽  
Mean Diameter ◽  
High Level ◽  
Important Value Index

The availability information about species composition and growth performance of mangrove forest are required to determine the best strategies for sustainable ecosystems management, particularly at the coastal area. This study aimed to quantify the number of species composition and growth performance of mangrove stand that established at the coast of Tanah Merah, East Nusa Tenggara. Forest inventory was conducted using nine permanent sampling plot which evenly distributed in every zonation of mangrove. Data were collected in each life stage of vegetation, namely seedling, sapling, pole, and tree. Several parameters were calculated to describe species composition, including important value index, richness, heterogeneity, and evenness. Four indicators were selected to assess the growth performance of mangrove stand in this location, i.e. mean diameter, average height, timber volume, and wood biomass. Results demonstrated the species composition of mangrove forest consisted of 9 different plants. The highest important value index of seedling was noted in A. marina (124.09) while the greatest important value index of sapling, pole, and tree were recorded in S. alba by approximately 86.57, 130.01, 118.58 respectively. This location had low level of richness (1.22) and heterogeneity (0.88) but having high level of evenness (0.99). The mean diameter and height of mangrove stand in this area was 15.2 cm and 8.3 m with an average timber volume and wood biomass around 90.7 m3 ha-1 and 65.1 Mg ha-1 respectively. Based on these findings, we suggested to conduct enrichment planting for improving plant biodiversity of mangrove forest at the coast of Tanah Merah.

scholarly journals Species composition and biodiversity indexes of weeds in paddy rice on two sides of dike system during three crops in an Giang Province, Vietnam

2021 ◽  
Vol 42 (3(SI)) ◽  
pp. 895-902
Author(s):  
M.D. Quan ◽  
◽  
T.T. Hang ◽  
S.T. Nam ◽  
◽  
...  
Keyword(s):  
Species Composition ◽  
Similarity Index ◽  
Paddy Rice ◽  
Occurrence Frequency ◽  
Outer Side ◽  
Weed Species ◽  
Biodiversity Indices ◽  
And Control ◽  
Two Sides ◽  
Scientific Name

Aim: This study was conducted to provide data on weed species composition and biodiversity indexes at different rice crops inside and outside of the dike system in An Giang province, Vietnam. Methodology: Weeds were collected from paddy rice of inner and outer side of dike system from six districts of An Giang province, Vietnam. From each sampling sites, two quadrats with 100 m2 (10 m × 10 m) per quadrat were selected to collect weed after 75-80 days of rice planting. Weeds were collected and identified for their scientific name, and the number of each species was defined, followed by calculation of the occurrence frequency and density of samples. Biodiversity indices viz. Shannon-Weaver (H’), Simpson (1- λ), Margalef (d), and similarity index were also studied among three crops and two sides of dike system. Results: The weed composition in the paddy rice in An Giang was diversity with 137 species. Among them, the most species belonged to families Poaceae, Cyperaceae, and Compositae. The species composition of Crop 3 was the highest one. Species occurrence frequency and weed density of groups C, D, E reached the highest value in Crop 1, followed by Crop 2 and 3. The biodiversity indices of weed species composition in the studied sites were high, reaching the highest value in Crop 3. Interpretation: The results of this study enhance the knowledge of weed species composition and biodiversity indexes to effectively manage and control weeds in rice cultivation.

Sign in / Sign up

Export Citation Format

Share Document