scholarly journals Species Richness and Longitudinal Distribution of Macrobenthos at River Pelus in Banyumas

2020 ◽  
Vol 593 ◽  
pp. 012021
Author(s):  
MH Sastranegara ◽  
AE Pulungsari ◽  
ET Winarni ◽  
Kusbiyanto ◽  
Febry Ramdani ◽  
...  
Keyword(s):  
Species Richness ◽  
Longitudinal Distribution

scholarly journals DISTRIBUSI LONGITUDINAL DAN STRUKTUR POPULASI Rasbora spp. DI SUNGAI BANJARAN KABUPATEN BANYUMAS

2014 ◽  
Vol 1 (2) ◽  
pp. 167
Author(s):  
Titis Amelia ◽  
Windiariani Lestari ◽  
Agus Nuryanto
Keyword(s):  
Body Weight ◽  
Population Structure ◽  
Species Richness ◽  
The Body ◽  
Longitudinal Distribution ◽  
Running Water ◽  
Total Length ◽  
Physical Chemical ◽  
Chemical Factors ◽  
Species Richness And Abundance

Rasbora is a genus of freshwater fish of the family Cyprinidae. Three species belonging to this genus were found in Java Island; R. aprotaenia, R. lateristriata, and R. argyrotaenia. Rasbora inhabits clear running water with sandy and gravel bottom. This study aimed to determine the longitudinal distribution of Rasbora spp. based on their species richness and abundance at Banjaran River; to determine the population structure of Rasbora spp based on their body weight, standard and total length; and to identify interactions between physical-chemical factors with species richness and abundance of Rasbora spp. This research was a survey, with purposive random sampling technique applied to collect samples. The research divided the study sites into five stations based on their altitude and topography. The Cluster Analysis was calculated based on species richness and relative abundance of Rasbora spp., while the longitudinal distribution and the population structure were presented descriptively. The interaction between the physical-chemical factors and the species richness and abundance of Rasbora were analyzed using Principal Component Analysis (PCA). Thi study found two species of Rasbora, namely Rasbora argyrotaenia and Rasbora lateristriata with 80 and 2 individuals respectively. R. argyrotaenia was distributed longitudinally along Banjaran River. Meanwhile, R. latestriata was only found at the upstream. Based on the body weight, the population of R. argyrotaenia at the station three were found highest by the average body weight of 1–6 gr of a total 31 individuals. The maximum measurements of the standard length were observed at the station 3 with a range of diameter 4.0–5.9 cm of 30 individuals. The total length were also found at the station 3 with a range of measuremtnt 5.0–7.9 cm of 33 individuals. R. latestriata was found only two individual with body weights measured were 9 gr and 10 gr, the standard lengths were 7.6 and 8.5 cm, and the total lengths were 9.5 and 10.5 cm. The distribution of R. argyrotaenia was influenced mostly by pH, the speed of the water, and DO. The presence of R. lateristriata was influenced primarily by BOD and depth.

scholarly journals Species richness and longitudinal distribution of crustaceans in the Logawa River, Banyumas, Indonesia

2020 ◽  
Vol 21 (11) ◽  
Author(s):  
Moh. Husein Sastranegara ◽  
KUSBIYANTO KUSBIYANTO ◽  
ANASTASIA ENDANG PULUNGSARI
Keyword(s):  
Species Richness ◽  
Research Method ◽  
Oxygen Demand ◽  
Sampling Technique ◽  
Longitudinal Distribution ◽  
High Chemical ◽  
Cosmopolitan Species ◽  
High Ammonia ◽  
Varuna Litterata ◽  
High Chemical Oxygen Demand

Abstract. Sastranegara MH, Kusbiyanto, Pulungsari AE. 2020. Species richness and longitudinal distribution of crustaceans in the Logawa River, Banyumas, Indonesia. Biodiversitas 21: 5322-5330. The Logawa River originates in a forest on Slamet Mountain and empties into the Serayu River. In this river, crustaceans play an important role as river macrobenthos. This research aimed to evaluate the species richness and longitudinal distribution of crustaceans. The research method was a stratified random sampling technique at eight stations with five replicates. Crustacean samples were collected using a Surber net, and water samples were taken with a water sampler. The results showed that there were six species of Decapoda in the river. Of these six species, three were shrimps and three were crabs. In longitudinal distribution, the shrimp Macrobrachium idae could be categorized as a cosmopolitan species that inhabited all stations, although there were several river branches before Stations IV (Cangkring Stream), V (Mengaji Stream), and VI (Banjaran Stream), bedrock substrate at Station I, high ammonia at all stations and high chemical oxygen demand (COD) between Stations IV and VIII. The crab Varuna litterata was found only at Station VI. In general, the species richness decreased after Station IV due to COD from the riverside. This was caused by human activities such as stone and sand excavation and overfishing in the habitat. The upstream habitat with its bedrock substrate was not suitable for decapods, except for cosmopolitan species.  

Fish communities of a perturbed stream in Southern Nigeria

1988 ◽  
Vol 4 (1) ◽  
pp. 49-59 ◽  
Author(s):  
Reginald Victor ◽  
Jacob Odenkey Tetteh
Keyword(s):  
Species Richness ◽  
Fourth Order ◽  
Fish Community ◽  
Fish Communities ◽  
Longitudinal Distribution ◽  
Order Stream ◽  
Cichlid Species ◽  
Habitat Alterations ◽  
Southern Nigeria ◽  
Community Changes

ABSTRACTFish communities of a fourth order stream impounded by a weir were studied in Southern Nigeria. Fifty-eight species were recorded of which 90% occurred upstream while reservoir and downstream accounted for 48% and 43% respectively. The distribution of some fish families indicated the effects of habitat alterations caused by reservoir and downstream conditions. The fauna upstream was different from that of reservoir and downstream. Relative abundance of non-cichlids common to reservoir and downstream showed 42% similarity. The longitudinal distribution of three non-cichlid populations was different in reservoir and downstream. Non-cichlid species richness was almost similar in reservoir and downstream, but its general diversity and evenness were higher in reservoir than its downstream. Fish community changes in this stream are discussed.

Dominance determines fish community biomass in a temperate seagrass ecosystem

2019 ◽  
Author(s):  
Aaron Matthius Eger ◽  
Rebecca J. Best ◽  
Julia Kathleen Baum
Keyword(s):  
Species Richness ◽  
Ecosystem Function ◽  
Fish Community ◽  
Prey Capture ◽  
Fish Communities ◽  
Functional Trait ◽  
Ecosystem Functions ◽  
Community Biomass ◽  
Ecosystem Valuation ◽  
Species Abundances

Biodiversity and ecosystem function are often correlated, but there are multiple hypotheses about the mechanisms underlying this relationship. Ecosystem functions such as primary or secondary production may be maximized by species richness, evenness in species abundances, or the presence or dominance of species with certain traits. Here, we combined surveys of natural fish communities (conducted in July and August, 2016) with morphological trait data to examine relationships between diversity and ecosystem function (quantified as fish community biomass) across 14 subtidal eelgrass meadows in the Northeast Pacific (54° N 130° W). We employed both taxonomic and functional trait measures of diversity to investigate if ecosystem function is driven by species diversity (complementarity hypothesis) or by the presence or dominance of species with particular trait values (selection or dominance hypotheses). After controlling for environmental variation, we found that fish community biomass is maximized when taxonomic richness and functional evenness is low, and in communities dominated by species with particular trait values – those associated with benthic habitats and prey capture. While previous work on fish communities has found that species richness is positively correlated with ecosystem function, our results instead highlight the capacity for regionally prevalent and locally dominant species to drive ecosystem function in moderately diverse communities. We discuss these alternate links between community composition and ecosystem function and consider their divergent implications for ecosystem valuation and conservation prioritization.

Functional evenness of bird communities varies along the elevational gradient in Europe: Conservation implications

2019 ◽  
Author(s):  
Federico Morelli ◽  
Yanina
Keyword(s):  
Species Richness ◽  
Elevation Gradient ◽  
Bird Species ◽  
Elevational Gradient ◽  
Negative Association ◽  
Bird Communities ◽  
Breeding Bird ◽  
Bird Species Richness ◽  
Large Spatial Scale ◽  
Functional Evenness

ContextThe negative association between elevation and species richness is a well-recognized pattern in macro-ecology. ObjectivesThe aim of this study was to investigate changes in functional evenness of breeding bird communities along an elevation gradient in Europe. MethodsUsing the bird data from the EBCC Atlas of European Breeding Birds we estimated an index of functional evenness which can be assumed as a measure of the potential resilience of communities.ResultsOur findings confirm the existence of a negative association between elevation and bird species richness in all European eco regions. However, we also explored a novel aspect of this relationship, important for conservation: Our findings provide evidence at large spatial scale of a negative association between the functional evenness (potential community resilience) and elevation, independent of the eco region. We also found that the Natura2000 protected areas covers the territory most in need of protection, those characterized by bird communities with low potential resilience, in hilly and mountainous areas.ConclusionsThese results draw attention to European areas occupied by bird communities characterized by a potential lower capacity to respond to strong ecological changes, and, therefore, potentially more exposed to risks for conservation.

Longitudinal distribution of total ozone content in edge region of antarctic stratospheric vortex

2005 ◽  
Vol 11 (5-6) ◽  
pp. 5-11
Author(s):  
A.V. Grytsai ◽  
◽  
O.M. Evtushevsky ◽  
G.P. Milinevsky ◽  
Z.I. Grytsai ◽  
...  
Keyword(s):  
Total Ozone ◽  
Ozone Content ◽  
Longitudinal Distribution ◽  
Total Ozone Content ◽  
Edge Region

Plant diversity and species richness of Ljubljana marsh grasslands under the influence of different cutting and fertilizing regimes

2009 ◽  
Vol 57 (2) ◽  
pp. 197-203 ◽  
Author(s):  
T. Sinkovč
Keyword(s):  
Species Richness ◽  
Plant Diversity ◽  
Grassland Management ◽  
Botanical Composition ◽  
Significant Negative Effect ◽  
Negative Effect ◽  
Cutting Regimes ◽  
N Rates ◽  
Exploitation Intensity ◽  
Plot Design

The botanical composition of grasslands determines the agronomic and natural values of swards. Good grassland management usually improves herbage value, but on the other hand it frequently decreases the plant diversity and species richness in the swards. In 1999 a field trial in a split-plot design with four replicates was therefore established on the Arrhenatherion type of vegetation in Ljubljana marsh meadows in order to investigate this relationship. Cutting regimes (2 cuts — with normal and delayed first cut, 3 cuts and 4 cuts per year) were allocated to the main plots and fertiliser treatments (zero fertiliser — control, PK and NPK with 2 or 3 N rates) were allocated to the sub-plots. The results at the 1 st cutting in the 5 th trial year were as follows: Fertilising either with PK or NPK had no significant negative effect on plant diversity in any of the cutting regimes. In most treatments the plant number even increased slightly compared to the control. On average, 20 species were listed on both unfertilised and fertilised swards. At this low to moderate level of exploitation intensity, the increased number of cuts had no significant negative effect on plant diversity either (19 species at 2 cuts vs. 20 species at 3 or 4 cuts). PK fertilisation increased the proportion of legumes in the herbage in the case of 2 or 3 cuts. The proportion of grasses in the herbage increased in all the fertilisation treatments with an increased numbers of cuts. Fertiliser treatment considerably reduced the proportion of marsh horsetail ( Equisetum palustre ) in the herbage of the meadows. This effect was even more pronounced at higher cut numbers. The proportion of Equisetum palustre in the herbage was the highest in the unfertilised sward with 2 cuts (26.4 %) and the lowest in the NPK-fertilised sward with 4 cuts (1.4%).

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