Comparisons among colonization of artificial substratum types and natural substratum by benthic macroinvertebrates

Hydrobiologia ◽  
1996 ◽  
Vol 341 (1) ◽  
pp. 57-64 ◽  
Author(s):  
Richard J. Casey ◽  
Sharon A. Kendall
Keyword(s):  
Benthic Macroinvertebrates ◽  
Artificial Substratum ◽  
Natural Substratum

scholarly journals Simúliofauna do Rio Marumbi, Morretes, Paraná, Brasil. II. Substratos naturais e artificiais dos imaturos e fauna associada (Diptera, Simuliidae)

1992 ◽  
Vol 21 ◽  
Author(s):  
Júlio Dellome Filho
Keyword(s):  
Organic Material ◽  
Black Flies ◽  
Artificial Substratum ◽  
Submerged Plants ◽  
Associated Fauna ◽  
Larval Stages ◽  
Natural Substratum

É estudado o substrato natural dos estágios larvais de similídeos no Rio Marumbi (Morretes, Paraná, Brasil). É formado por plantas marginais e submersas. Fios plásticos amarelos e verdes foram usados como substratos artificiais e foi mostrado que os fios amarelos são os preferidos pelas larvas. A fauna associada aos imaturos é constituída de artrápodos e peixes. Larvas de Athericidae foram encontrada em matéria em decomposição. Abstract The natural substratum of the black flies larval stages on Marurnbi River (Morreres, Paraná, Brasil) were exaniined. lt was found to be constituted by marginal and submerged plants only. Yellow and green plastic threads as artificial substratum were used and showed that immatures prefer the yellow ones. The associated fauna to immatures was found to be constituted by arthropods and fishes. Athericidae larvae were found in decomposed organic material; this is the first citation of this farnily in Brazil. Résumé Le substrat naturel des larves de quelques Simuliidae dans le fleuve Marumbi (Morretes, Paraná, Brésil) est examiné. Les plantes marginales et submergeés sont l'unique substrat. Entre fils de plastique verds et jaunes, les fils jeunes sont de préférence de les larves comme substrat artificiel. La faune associeé sont l’espéces des poisons et des artropodes.

scholarly journals Do the assemblages of benthic macroinvertebrates in nearshore waters of Western Australia vary among habitat types, zones and seasons?

2005 ◽  
Vol 85 (2) ◽  
pp. 217-232 ◽  
Author(s):  
M.D. Wildsmith ◽  
I.C. Potter ◽  
F.J. Valesini ◽  
M.E. Platell
Keyword(s):  
Species Composition ◽  
Benthic Macroinvertebrates ◽  
Habitat Type ◽  
Abundant Species ◽  
Subtidal Zone ◽  
Habitat Types ◽  
Environmental Characteristics ◽  
Deposit Feeding ◽  
Number Of Individuals

Benthic macroinvertebrates were sampled seasonally in the subtidal and upper and lower swash zones at two sites in each of six nearshore habitat types on the lower west coast of Australia. The habitat types, which differed mainly in the extent of their exposure to wave activity and whether sea grass and/or nearshore reefs were present, had been distinguished quantitatively using values for a suite of seven statistically-selected enduring environmental characteristics (Valesini et al., 2003). The core samples yielded 121 species representing eight phyla, among which the Polychaeta, Malacostraca and Bivalvia were the most speciose classes, contributing ∼38, 23 and 10%, respectively, to the total number of individuals. The total number of species and mean density of macroinvertebrates at the most protected habitat type (1), i.e. 70 and 209·2 individuals 0·1 m−2, respectively, were far greater than in any other habitat type. Habitat type influenced species composition to a greater extent than either zone or season. Furthermore, the extents of the differences among the species compositions of the six habitat types statistically matched the extents of the differences among the values for the suite of enduring environmental characteristics that distinguished each of those habitat types. Overall, the species composition at habitat type 1 was the most distinct, containing five abundant species of polychaetes that were adapted to deposit-feeding in calm waters with high levels of organic material and which were rare in all other habitat types. In contrast, the fauna at the most exposed habitat type was characterized by four crustacean species and a species of bivalve and polychaete, whose mobility and tough external surface facilitated their survival and feeding in turbulent waters. The zonal differences in faunal compositions among habitat types were greatest in the case of the subtidal zone. The faunal compositions differed among zones and seasons only at the most protected habitat type.

scholarly journals Assessment of the Impact of Small Hydropower Plants on the Ecological Status Indicators of Water Bodies: A Case Study in Lithuania

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 433
Author(s):  
Laima Česonienė ◽  
Midona Dapkienė ◽  
Petras Punys
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Suspended Solids ◽  
Ecological Status ◽  
Fish Abundance ◽  
Water Bodies ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Physico Chemical ◽  
The Impact

Hydropower plants produce renewable and sustainable energy but affect the river’s physico-chemical characteristics and change the abundance and composition of the aquatic organisms. The impact of large HPPs on the ecological conditions of surface water bodies have been extensively studied, but less attention has been paid to environmental impact studies of small hydropower plants (SHPs). The impact of hydropeaking on both the river flow regime and ecosystems has been well-studied for peaking mode plants, mainly medium to large-sized ones. However, for small hydroelectric power plants, and especially for those in lowland rivers, the available information on water quality, benthic macroinvertebrates communities and fish abundance, and biomass is not sufficient. Ten small hydropower plants were selected, and the ecological status of water bodies was assessed in different parts of Lithuania. The studies were performed at the riverbed upstream from the SHPs, where the hydrological regime has not changed, and downstream from the SHPs. It was found that the small hydropower plants do not affect the physico-chemical values of the water quality indicators. This study demonstrated that the total number of benthic macroinvertebrates taxa (TS) is influenced by the concentration of nitrogen and suspended solids, the water flow, the river area, and the current speed; the number of EPT (Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies)) taxa is influenced by the concentration of nitrogen and suspended solids. The studied indicators do not have a significant impact on biomass. The SHPs affect the fish abundance and biomass. The Lithuanian fish index (LFI) is influenced by the average depth and area of the river. Some SHPs operating in lowland areas may yield somewhat significant hydrograph ramping but more detailed investigation is needed to support the significance of this impact on the biological indices.

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