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Showing 1 to 20 of 91 for “"benthic macroinvertebrates"”.
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Ecology of benthic macroinvertebrates in experimental ponds
… mg DW/sampler/yr for Odonata. Comparison of the benthic macroinvertebrate community at the end of year 1 to the benthic macroinvertebrate community at the end of year 2 showed no significant differences for community summary measures (total density, taxa richness, diversity, Bray-Curtis …
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Biomonitoring an Impacted Stream Using Benthic Macroinvertebrates and Bioassays
This study used a combination of benthic macroinvertebrate biomonitoring and single-species bioassays to monitor water quality in Wilson's Creek, Springfield, MO, for the 2-year period January 1993-December 1994. Wilson's Creek was potentially impacted by increased urbanization, agricultural …
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Species Diversity of Benthic Macroinvertebrates in the Des Moines River, Iowa
… Moines River. Iowa by sampling and analyzing the benthic macroinvertebrate community. Procedure. Artificial substrates at four stations were used to collect benthic macroinvertebrates. Community structure was analyzed with species divorsity indices. Species diversity (D) and redundancy (R) values …
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Effects of sediment upon benthic macroinvertebrates in forested northern Appalachian streams
… investigated the influence of fine sediment upon benthic macroinvertebrates. The first part encompassed two experiments in sediment manipulation in 1999 and 2000. The experiments tested benthic macroinvertebrate metric sensitivity to a range of fine sediment treatments. The second part involved …
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Ecologically relevant low flows for riverine benthic macroinvertebrates: characterization and application
… various degrees of physical disturbance to benthic macroinvertebrate assemblages of perennial rivers.
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The Impact of Urbanization on Benthic Macroinvertebrates in Southern Appalachian Streams
… in the study watersheds. Quantitative benthic macroinvertebrate samples were taken, and a variety of physicochemical characteristics were measured. Increasing urbanization resulted in a decline in diversity and abundance of intolerant organisms. Streams in industrial areas had greater …
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Contemporary Assessment of Benthic Macroinvertebrates and Fish Interaction in the Truckee River, NV
… water quality and investigated the response of benthic macroinvertebrates to these changes. In addition, the interactions among native and non-native fishes were investigated. In chapter 1, the longitudinal trends of water quality and benthic macroinvertebrates were examined. A linear mixed …
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Ecological Studies on Benthic Macroinvertebrates in Lowland Rivers in Relation to Water Quality
The effectiveness of using macro-invertebrate communities as indicators of water quality and pollution in deep lowland rivers was investigated, and the effects of natural environmental changes on their ability to monitor pollution was assessed. Various sampling and data processing techniques were …
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Ecological studies of benthic macroinvertebrates for determining sedimentation impacts in Chattahoochee National Forest streams
Understanding sedimentation impacts to benthic macroinvertebrates in headwater, mountain streams is a top priority of watershed management programs in the Chattahoochee National Forest. Five studies involving the analysis of historical, biological survey data and current data were conducted to …
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Relations between large woody debris, physical habitat, and benthic macroinvertebrates in Appalachian mountain streams
… reach and around individual logs, to determine benthic macroinvertebrate relations to physical habitat, and to determine the potential effects of LWD created stream channel alterations on benthic macroinvertebrates. Pool frequency and total surface area increased substantially at the expense of …
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How do fine sediments and Hangman Creek discharge affect benthic macroinvertebrates in the Spokane River?
… source of fine sediment to the Spokane River. Benthic macroinvertebrates play a crucial function in food webs as an important source of food for many stream predators, including fish. Also, benthic invertebrates are effective indicators of the ecological condition of rivers, including those …
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Production of benthic macroinvertebrates in a river used for commercial navigation: Kanawha River, West Virginia
… this study was to analyze the production of the benthic macroinvertebrates in a commercially navigated river in order to assess the environmental impacts of increasing levels of traffic. Production was estimated for 16 taxa at two sites in the Winfield navigational pool (Upper Winfield - UW; …
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A Biological Assessment of the Fish and Benthic Macroinvertebrates From Two Urban Streams in Springfield, Missouri
… Creeks in Springfield, Missouri. Fish and benthic macroinvertabrate samples were collected from each stream using the U.S. Environmental Protection Agency’s Rapid Bioassesment Protocols for Use in Wadeable Streams and Rivers. Samples were collected in September 2004 and February 2005, and …
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Evaluating the Potential Impacts of Municipal Wastewater Effluent on Benthic Macroinvertebrates in the Upper Bow River
… and Calgary) through characterizations of the benthic macroinvertebrate assemblages in the mainstem and experimental stream systems associated with Calgary’s Pine Creek wastewater treatment plant. Changes to benthic macroinvertebrate assemblages on a longitudinal gradient and cumulative …
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Effects of land-use change on benthic macroinvertebrates in the upper reaches of the Apies-Pienaar catchment
… these impacts on freshwater ecosystems. Benthic macroinvertebrates are extensively used as indicators of ecosystem health and have been an instrumental tool in ecosystem monitoring and management. The effects of changing land use on macroinvertebrates at a fine scale however, have not …
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The Short Term Responses of Benthic Macroinvertebrates to the Removal of Riparian Rhododendron in Southern Appalachian Streams
… by hemlock. This study measured the consequences macroinvertebrates faced due to riparian Rhododendron removal from 300 m reaches of two low order streams. Two additional low order streams served as reference sites for the experiment. The stream macroinvertebrate communities were assessed using a …
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Studies of Benthic Macroinvertebrates in Western Virginia Streams as Related to the Implementation of Rapid Bioassessment Techniques
… there was little or no correspondence of benthic macroinvertebrate distribution with the ecoregions or subregions of western Virginia. I found that it was more accurate to rearrange the subregions into three larger regions called bioregions: the forested hills and mountains (subregion …
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Distributions of physical habitats and benthic macroinvertebrates in Western Cape headwater streams at multiple spatial and temporal scales
… in this thesis examines the links between benthic macroinverebrate (invertebrate) distributions and aspects of the physical habitat at different spatial and temporal scales in mountain and foothill zones of rivers in the Western Cape, South Africa. A geomorphological hierarchy was used as …
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Combined effects of water chemistry, canopy cover, and stream size on benthic macroinvertebrates along a Central Appalachian stream continuum
I sampled benthic macroinvertebrates along a 25.2 km stream continuum in the Central Appalachian Mountains of West Virginia from May---October 2000. Six components of macroinvertebrate community structure and function were measured: density, biomass, richness, community taxa similarity, feeding …
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Analyses of Two Aspects of Study Design for Bioassessment With Benthic Macroinvertebrates: Single Versus Multiple Habitat Sampling and Taxonomic Identification Level
… living organisms. Conducting bioassessment with benthic macroinvertebrates is still evolving and continues to be refined. There are strongly divided opinions about study design, sampling methods, laboratory analyses, and data analysis. Two issues that are currently being debated about study …
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