نتایج جستجو برای: abundance of tolerant taxa eg chironomidae
تعداد نتایج: 21174288 فیلتر نتایج به سال:
In order to determine the structure of benthic macroinvertebrates fauna in relation with some environmental factors, a study was carried out Esoa river at Nkongsamba Littoral region Cameroon from January 2021 2022. Physico-chemical parameters were measured according APHA and Rodier recommendations, while sampling done multihabitat approach monthly frequency. The physico-chemical analyses reveal...
The effects of the management of genetically modified herbicide-tolerant (GMHT) crops on the abundances of aerial and epigeal arthropods were assessed in 66 beet, 68 maize and 67 spring oilseed rape sites as part of the Farm Scale Evaluations of GMHT crops. Most higher taxa were insensitive to differences between GMHT and conventional weed management, but significant effects were found on the a...
The macroinvertebrate inventory was carried out using samples taken at 6 stations distributed along the longitudinal profile of Soubré lake and downstream part Sassandra river. Sampling monthly from July 2019 to February 2020. A total 20581 individuals belonging 117 taxa (genera species), 60 families, 17 orders classes were recorded. macrofauna largely dominated by molluscs, which accounted for...
We used wetland mesocosms (1) to experimentally assess whether inoculating a restored wetland site with vegetation/sediment plugs from a natural wetland would alter the development of invertebrate communities relative to unaided controls and (2) to determine if stocking of a poor invertebrate colonizer could further modify community development beyond that due to simple inoculation. After filli...
Dams are a major threat to aquatic biological diversity. By altering the natural flow of rivers, dams modify fluvial habitats, making them unsuitable for the growth and reproduction of many aquatic species. The aim of this study was to evaluate the effects of a reduced flow reach (RFR) on benthic macroinvertebrate communities. Benthic macroinvertebrates were collected at six sites downstream of...
UNLABELLED Nearly thirty-five years have passed since Hackman published his "Check list of the Finnish Diptera" (1980). The number of true flies (Diptera) known from Finland has increased by more than two thousand species since then. At the same time, hundreds of erroneous records have been recognized and purged from the checklist. ZooKeys issue 441 provides a new checklist of the Diptera speci...
Dissolved oxygen (DO) concentrations in lowland streams are naturally lower than those in upland streams; however, in some regions where monitoring data are lacking, DO criteria originally established for upland streams have been applied to lowland streams. This study investigated the DO concentrations at which fish and invertebrate assemblages at 35 sites located on lowland streams in southwes...
Chironomidae is one of the most important elements of the aquatic benthos all over the world, which has its own ecological and biological importance in different aspects. The present study has been conducted to investigate the chironomid diversity in Taleghan River in two seasons, spring and summer 2016 for six sampling points (Asfaran, Varkesh, Mir, Jostan, Barikan and Gooran). The sampling pr...
In an investigation of the effects of the effluent of fish farms on the water quality of the Marbor River in Isfahan province based on biological indicators, some cases of infection of macrobenthos with horsehair worms (Nematomorpha: Gordiidae) were observed. About 76% of the observed worms were observed to leave their hosts. the horsehair worms were identified in only three families of aquatic...
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