Author: Sanhita DattaPublisher:
ISBN:
Category : Invertebrates
Languages : en
Pages : 122
Book Description
An Evaluation of Benthic Macroinvertebrate Community Structure and Sediment Toxicity in Lake Taylorville
Author: Sanhita DattaPublisher:
ISBN:
Category : Invertebrates
Languages : en
Pages : 122
Book Description
The Benthic Macroinvertebrate Community Structure of Lake Houston, Texas
Author: James Glen HowardPublisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 206
Book Description
Analysis of the Benthic Macroinvertebrate Community Structure for Assessment of Water Quality of the Des Moines River
Author: Richard Leonard WestphalPublisher:
ISBN:
Category :
Languages : en
Pages : 98
Book Description
Examination of Littoral Benthic Macroinvertebrate Community Composition in Response to Calcium Decline in Northern Ontario Lakes
Author: Publisher:
ISBN:
Category : Freshwater invertebrate populations
Languages : en
Pages : 0
Book Description
There is a growing concern on the potential ecological effects of what appears to be recent declines in aqueous calcium (Ca) concentrations in softwater lakes in the Canadian Shield. The relative importance of calcium concentration on littoral macroinvertebrate community structure was investigated in six lakes within the Nipissing and Muskoka districts in Ontario, Canada. Benthic macroinvertebrates and water chemistry were sampled in the fall and sorted using the standard Ontario Benthos Biomonitoring Network protocols (OBBN) for lakes. Differences in community structure and density amongst the lakes were quantified using principle component analysis, canonical correspondence analysis and a series of one-way ANOVAs. The results indicated that habitat preferences of certain macroinvertebrates play a big role in the community structure of invertebrates within a lake. However, it was found even in preferential habitat (macrophyte, rock, silt, sand and detritus), the presence of gastropods in lakes were insignificant and often absent from sites and lake with low Ca concentrations. Amphipods displayed similar densities and composition in lakes sites with the similar Ca concentration and habitat (macrophytes, cobble and roots). Consequently, changes in Ca concentrations greatly reduced amphipods density, regardless of similar habitat. Bivalves were shown to be greatly associated with both habitat (buried in substrate) and the availability of environmental Ca in the lakes. In general, it was observed that lakes with higher Ca concentrations, generally above 2 mg/L were shown to have greater macroinvertebrate densities, in comparison to lakes with Ca concentrations below 2 mg/L. Plastic Lake (Ca= 0.96 mg/L) had the lowest abundance of crustaceans and molluscs between lakes. This result suggests that crustaceans and mollusc abundance in lakes can be greatly reduced when Ca concentrations drop below 1.00 mg/L altering community structure. Calcium sensitive groups, such as gastropods and amphipods within the crustaceans and molluscs family, were found to have higher abundance numbers in higher calcium lakes.
Benthic Macroinvertebrate Community Structure in a Backwater Lake of Pool 2, Upper Mississippi River
Author: The Effect of the Physical Environment on the Community Structure of Benthic Macroinvertebrates in the Cleveland Area of Lake Erie
Author: Carol Q. WelshPublisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 198
Book Description
A Comparison of Benthic Macroinvertebrate Community Structure from Four Littoral Zone Habitats of Hodgson Lake
Author: Robert Bruce GillespiePublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 164
Book Description
An Assessment of the Utility of Benthic Macroinvertebrate and Fish Community Structure in Biomonitoring, Peace, Athabasca and Slave River Basins
Author: Kevin Joseph CashPublisher:
ISBN:
Category : Nature
Languages : en
Pages : 232
Book Description
Data on benthic macroinvertebrate and fish community structure are widely recognised as being very useful in cumulative assessment and issues of ecosystem health and integrity. Measurements of aquatic community structure have been made periodically within the northern Alberta river basins over the past 30 years, but these data have not been standardised or co-ordinated, nor analysed to determine their appropriateness or to assess the general state of the aquatic ecosystem. This report describes efforts to assess the nature and quality of long-term data sets measuring benthic invertebrate and fish community structure and effluent loading within the Peace, Athabasca, and Slave river drainages. Information was collated and standardised to assess the utility of applying current biomonitoring techniques to these data, and recommendations were made on the most appropriate approaches to use in a long-term cumulative effects monitoring plan.
A Comparison of the Benthic Macroinvertebrate Community Structure of Two Oxbow Lakes in the Red River Basin in Northwest Louisiana
Author: Clarence Wayne ReedPublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 240
Book Description
Benthic Macroinvertebrate Community Structure in Relation to Water Quality and Habitat in the Upper Pecos River, Texas
Author: Greg L. LarsonPublisher:
ISBN:
Category : Aquatic animals
Languages : en
Pages : 44
Book Description