scholarly journals Development of a predictive model for benthic macroinvertebrates by using environmental variables for the biological assessment of Korean streams

2021 ◽  
Vol 36 (1) ◽  
pp. 189-216
Author(s):  
Jeong-ki Min ◽  
Dong-soo Kong
Keyword(s):  
Predictive Model ◽  
Benthic Macroinvertebrates ◽  
Environmental Variables ◽  
Biological Assessment

Spatio-temporal variations of benthic macroinvertebrates and the driving environmental variables in a shallow lake

2020 ◽  
Vol 110 ◽  
pp. 105948
Author(s):  
Yufeng Yang ◽  
Yujun Yi ◽  
Yang Zhou ◽  
Xuan Wang ◽  
Shanghong Zhang ◽  
...  
Keyword(s):  
Benthic Macroinvertebrates ◽  
Shallow Lake ◽  
Environmental Variables ◽  
Temporal Variations ◽  
Spatio Temporal

scholarly journals Spatial and temporal variation of benthic macroinvertebrate communities along an urban river in Greater Manchester, UK

2020 ◽  
Vol 192 (2) ◽  
Author(s):  
Cecilia Medupin
Keyword(s):  
Benthic Macroinvertebrates ◽  
Environmental Variables ◽  
Catchment Area ◽  
Abiotic Factors ◽  
Urban River ◽  
Spatial And Temporal Variation ◽  
Benthic Macroinvertebrate ◽  
Urban Rivers ◽  
Macroinvertebrate Communities ◽  
Standard Requirement

AbstractUrban rivers face challenges of increased human activities which also affect river organisms. In order to enhance freshwater biodiversity in urban rivers, it is important to determine how the benthic macroinvertebrate communities are influenced by key abiotic factors. This was investigated in this paper through the study of the spatial and temporal variations of benthic macroinvertebrates and water quality variables at the urban River Medlock in Greater Manchester, UK. Samples were obtained from five sections of the catchment (S1 to S5) over a period of 14 months and the results were compared with the standard requirement of the European Union’s Water Framework Directives. Multivariate tests including SIMPER (similarity percentages), PCA (principal component analysis) and BIOENV (biological and environmental) were carried out on the data in order to determine the environmental variables which most influenced the benthic macroinvertebrates. PCA of environmental variables indicated that 34% of the overall variance was heavily weighted on nutrients and catchment area (negatively on altitude and slope), 17% represented river substrate and the 12% represented discharge. The BIOENV analysis also indicated altitude, slope, catchment area, discharge and conductivity as the variables which influenced the biological communities. SIMPER analysis showed a difference between the upper and lower sections of the river with some sensitive taxa at the upper sites and showed that more organisms are present during spring. Apart from the lowest section of the river, the EU Water Framework Directive classification showed that other sites achieved the ‘good ecological status’. While 32 taxa groups were identified, abundant Baetidae, Chironomidae and Oligochaeta were recorded at all sites and seasons. The scores for biotic indices Whalley Hawkes Paisley and Trigg (WHPT) and Biological Monitoring Working Party (BMWP) were found to be similar. By the application of surrogate variables such as percentage urban cover, catchment area and total number of organism, the influence of urbanisation could be seen in the abundance of organisms over time and space.

scholarly journals Diversity of benthic macroinvertebrates and water quality of Karasu Stream (Black Sea)

2021 ◽  
Vol 38 (4) ◽  
pp. 467-477
Author(s):  
Eylem Aydemir Çil ◽  
Murat Özbek ◽  
Öztekin Yardım ◽  
Seray Yıldız ◽  
Ayşe Taşdemir ◽  
...  
Keyword(s):  
Water Quality ◽  
Species Richness ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
Black Sea ◽  
Benthic Macroinvertebrates ◽  
Environmental Variables ◽  
Benthic Macroinvertebrate ◽  
Black Sea Region

The study was conducted in Karasu Stream (Sinop Province, Black Sea Region of Turkey). The purpose of this study is, to determine the benthic macroinvertebrate composition of the stream, together with some of its environmental characteristics (water temperature, pH and dissolved oxygen) to evaluate the trophic level of the stream. Samplings of benthic macroinvertebrates and environmental variables were performed monthly at ten stations between February 2013 and January 2014. As a result, 18260 specimens were investigated and 175 taxa were determined. Chironomidae and Oligochaeta were the higher groups in terms of species richness with 48 and 38 taxa, respectively. The BMWP and ASPT indices indicate that all the stations belong to “slightly polluted (Class II)” or “unpolluted (Class I)” water quality levels.

Assessing alpha and beta diversities of benthic macroinvertebrates and their environmental drivers between watersheds with different levels of habitat transformation in Japan

2019 ◽  
Vol 70 (4) ◽  
pp. 504 ◽  
Author(s):  
Chia-Ying Ko ◽  
Tomoya Iwata ◽  
Jun-Yi Lee ◽  
Aya Murakami ◽  
Junichi Okano ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Benthic Macroinvertebrates ◽  
Environmental Variables ◽  
Species Turnover ◽  
Alpha Diversity ◽  
Freshwater Ecosystems ◽  
Environmental Drivers ◽  
Habitat Transformation ◽  
Β Diversity ◽  
Different Levels

Little is known about differences in species diversity among ecological communities subject to different levels of human-caused habitat transformation and how this disturbance contributes to diversity through symbiotic dependencies with the environment in freshwater ecosystems. We estimated α and β diversities of benthic macroinvertebrates and relationships between diversity and environmental variables in Ado River (natural) and Yasu River (intermediately disturbed) watersheds, Japan. Alpha diversity was consistently slightly higher in the natural river watershed than in the intermediately disturbed one, but the spatial distribution was not equivalent. The opposite pattern was found for β diversity. Significant differences in environmental variables existed between the two river watersheds, with especially high chlorophyll-a concentrations detected in the intermediately disturbed watershed. Alpha diversity was not correlated with specific environmental variables, whereas water temperature and chlorophyll-a concentrations were the two most significant environmental variables influencing β diversity across sites in the two watersheds. These results suggest that diversity patterns in freshwater benthic macroinvertebrates are differentially influenced by levels of human-caused habitat transformation, especially that intermediately disturbed habitats may benefit species turnover, and further understanding how they relate to environmental variables is essential for protecting local to regional diversity and can provide useful information for conservation planning to maximise biodiversity at the watershed scale.

scholarly journals Environmental drivers of the benthic macroinvertebrates community in a hypersaline estuary (Northeastern Brazil)

2016 ◽  
Vol 28 (0) ◽  
Author(s):  
Carlinda Railly Ferreira Medeiros ◽  
Annyelle Kelly da Silva Costa ◽  
Caroline Stefani da Silva Lima ◽  
Jacicleide Macedo Oliveira ◽  
Marcos Medeiros Cavalcanti Júnior ◽  
...  
Keyword(s):  
Dissolved Oxygen ◽  
Benthic Macroinvertebrates ◽  
Environmental Variables ◽  
River Estuary ◽  
Macroinvertebrate Community ◽  
Northeastern Brazil ◽  
Environmental Drivers ◽  
Benthic Macroinvertebrate ◽  
Individual Species ◽  
Structural Aspects

Abstract Introduction The estuarine community of benthic macroinvertebrates spatially varies in response to changes in environmental variables in these ecosystems. Understanding this variability helps our understanding the mechanisms structuring these communities. Aim Assess the structural aspects of the benthic macroinvertebrate community in a hypersaline estuary, and to relate to environmental variables that influence the community structure along the estuary. Methods The study was conducted at Tubarão river estuary in May 2015. We sampled two estuarine areas (upper and lower), and in each zone were sampled six points composed of two replicas, one sampled in sandy bottom and the other in muddy bottom. Samples of benthic macroinvertebrates and estuarine environmental variables were collected. Environmental drivers of the benthic macroinvertebrate community were determined by Distance-based Linear Models analysis. The contribution of individual species to the dissimilarity between the areas and substrate types were determined by analysis of the percentage of similarity. Results The composition of benthic macroinvertebrate community differed between the upper and lower areas, although it was similar between the muddy and sandy bottoms. The variation in the benthic community between areas was mainly related to the influence of salinity in the upper area. In the lower area, the variation of the macroinvertebrates was related to salinity, associated with other variables in the sandy (temperature, turbidity and dissolved oxygen) and muddy (temperature, total dissolved solids and dissolved oxygen) substrates. Taxa which contributed most to the dissimilarity between the upper and lower areas were Nereididae (17.89%), Anomalocardia brasiliana (15%) and Cirratulidae (10.43%). Conclusions Salinity was the main driver of the structural aspects of the benthic macroinvertebrate community in the upper area of the estuary, although in the lower area a set of variables have structured benthic macroinvertebrates in the hypersaline estuary studied. In addition, the largest mangrove cover and less influence of the tide, may have favored the greater abundance of macroinvertebrates in the upper area.

scholarly journals Linking Macroinvertebrates and Physicochemical Parameters for Water Quality Assessment in the Lower Basin of the Volta River in Ghana

2021 ◽  
Author(s):  
Michael Onwona Kwakye ◽  
Feng-Jiao Peng ◽  
Jonathan N. Hogarh ◽  
Paul J. Van den Brink
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Environmental Variables ◽  
Physicochemical Parameters ◽  
Limit Of Detection ◽  
Permutation Test ◽  
Juvenile Fish ◽  
Principal Component ◽  
Water Quality Assessment ◽  
Quality Standard

AbstractThe health of the lower basin of the Volta River in Ghana was evaluated in January–February and May–June 2016 using physicochemical parameters and benthic macroinvertebrates sampled at 10 locations. Selected environmental variables were compared to accepted environmental water quality standard values where applicable. Principal component analysis (PCA) and redundancy analysis (RDA) were used to analyse the association between the benthic macroinvertebrates distribution and physicochemical variables. Pesticide concentrations were generally below the limit of detection 0.01 and 0.005 µg/L for organophosphate/synthetic pyrethroid and organochlorines respectively. Nutrient levels were also generally low; however, significant differences existed between the values of physicochemical parameters at the different sampling sites and seasons (Monte Carlo permutation test; p = 0.002), as well as between the abundance of macroinvertebrates at the different sites and seasons (p = 0.002). The environmental variables dissolved oxygen (DO), phosphate, pH, substratum (p < 0.05), turbidity, conductivity, total dissolved solids, total solids and nitrate (0.05 < p < 0.10) significantly explained the variation in macroinvertebrate composition between sampling stations in the Volta River. Polypedilum fuscipenne, was positively correlated with turbidity and DO concentrations; Physa sp., Centroptilum sp., Centroptiloides sp., Phaon iridipennis and juvenile fish were positively correlated with nitrate concentration and pH and negatively correlated with turbidity and DO. Polluted sites were dominated by the snail Lymnaea glabra. This demonstrates that physicochemical parameters and macroinvertebrates could be applied to describe the water quality and improve the biomonitoring for water resources management and the environmental protection in the Lower Volta River.

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