Author: Richard Leonard WestphalPublisher:
ISBN:
Category :
Languages : en
Pages : 98
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
Research Reports Supported by Office of Water Resources Research Under the Water Resources Act of 1964, Received During the Period, July 1971-1977/79
Author: Water Resources Scientific Information CenterPublisher:
ISBN:
Category : Water resources development
Languages : en
Pages : 430
Book Description
Research Reports Supported by Office of Water Research and Technology Received During the Period ...
Author: Selected Water Resources Abstracts
Author: Research Reports Supported by Office of Water Resources Research Under the Water Resources Research Act of 1964
Author: Water Resources Scientific Information CenterPublisher:
ISBN:
Category : Water resources development
Languages : en
Pages : 218
Book Description
Selected Water Resources Abstracts
Author: Government Reports Announcements
Author: 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.
Analysis of Variability in New York State Benthic Macroinvertebrate Samples
Author: Alexander Johnston SmithPublisher:
ISBN:
Category : Freshwater invertebrates
Languages : en
Pages : 56
Book Description
Determining the Association Between the Structure of Stream Benthic Macroinvertebrate Communities and Agricultural Best Management Practices
Author: Roger Holmes (M.Sc.)Publisher:
ISBN:
Category :
Languages : en
Pages : 174
Book Description
Farmers have been encouraged to adopt more sustainable farming practices (BMPs) that mitigate adverse agricultural effects on the natural environment. However, the ability of BMPs to protect or restore riverine systems continues to be questioned due to limited evidence directly linking BMP use with improved ecological conditions. The exclusion of hydrological pathways in previous field studies may explain why a direct link has not yet been established. The goal of this study was to assess the association between benthic macroinvertebrate community structure and the number and location of agricultural BMPs. Macroinvertebrates and water chemistry were sampled in 30 headwater catchments in the Grand River Watershed. Catchments exhibited gradients of BMP use and location as measured by the degree of hydrologic connectedness. Stepwise ordination regressions and variance partitioning were used to determine which environmental variables (i.e., BMP metrics, water chemistry parameters, habitat characteristics, and land use variables) were associated with benthic macroinvertebrate community structure. Water chemistry parameters were negatively associated with BMP metrics suggesting BMPs were mitigating losses of nutrients and sediments. However, BMP abundance and location explained minimal variation in benthic macroinvertebrate structure within the 30 sampled catchments. The absence of a strong association between BMPs and benthic macroinvertebrates may indicate a need for greater numbers and targeted siting of BMPS to improve water quality beyond a threshold point that would allow recolonization of intolerant invertebrate taxa. Focusing of conservation goals on ecological conditions and the promotion of BMPs that enhance in-stream habitat may also be required.