Author: David H. BennettPublisher:
ISBN:
Category :
Languages : en
Pages : 28
Book Description
Comparison and Dynamics of the Benthic Macroinvertebrate Community of Lower Granite, Little Goose and Lower Monumental Reservoirs
Author: David H. BennettMcNary Reservoir and Lower Snake River Reservoirs, Dredged Material Management Plan
Author: Impact of Environmental Dewatering of Lower Granite and Little Goose Reservoirs on Benthic Invertebrates and Macrophytes
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 31
Book Description
An investigation into the effects of dewatering on the benthic fauna in Lower Granite and Little Goose reservoirs was undertaken. Benthos in both the soft bottom regions of the reservoirs as well as those inhabiting the rock rip-rap along the shoreline were studied. These organisms provide an important food resource for both migrating salmonids and resident fish species; thus, impacts of contemplated dewatering schemes require evaluation. The results of these studies indicate that there were no significant, long-term impacts to the soft bottom benthos as a result of dewatering in Little Goose Reservoir. In fact, higher numbers of some taxa indicate that there may have been a washout of these organisms from Lower Granite Reservoir with subsequent deposition in the upper reaches of Little Goose Reservoir. This should be accompanied by a coincident decrease in these organisms in Lower Granite Reservoir. However, we did not have pre-dewatering samples from Lower Granite Reservoir with which we could compare post-filling samples to determine if the dewatering resulted in lower benthic populations.
Annual Report
Author: University of Idaho. Forest, Wildlife, and Range Experiment StationPublisher:
ISBN:
Category : Forests and forestry
Languages : en
Pages : 40
Book Description
Impact of Experimental Dewatering of Lower Granite and Little Goose Reservoirs on Benthic Invertebrates and Macrophytes
Author: Colbert E. CushingA Historical Comparison and Habitat Associations of Benthic Macroinvertebrate Communities in Southern Green Bay, Lake Michigan
Author: Cadie OlsonPublisher:
ISBN:
Category : Benthic ecology
Languages : en
Pages : 146
Book Description
Southern Green Bay, Lake Michigan is one of the most productive ecosystems in the Great Lakes and has historically been subjected to a wide range of stressors, yet little is known about the current macroinvertebrate community structure. The most recent comprehensive assessment of benthic fauna was by Markert (1982) in 1978. The objectives of this project were to describe the current macroinvertebrate community, examine changes since 1978, and identify major environmental drivers of benthic community compositions. In total, 258 stations were surveyed, including 97 that were also sampled in 1978, 100 that were added to increase spatial resolution, and 61 that were subjected to periodic hypoxia. I collected 95 macroinvertebrate taxa in southern Green Bay with the community dominated by the eurytopic midge Chironomus and immature tubificid worms. Nonmetric multidimensional scaling (NMDS) ordination and indicator analyses distinguished contemporary and historical communities and revealed shifts in benthic macroinvertebrate structure; although oligochaete worms and chironomids remained dominant over time, Chironomus abundance increased and characterized the contemporary community, whereas the benthos were historically more diverse. The magnitude of temporal change varied regionally with larger differences concentrated in southern middle bay and the inner bay remaining comparable to 1978. Contemporary assemblages are driven primarily by productivity, substrate type, and hypoxia, according to NMDS ordinations. Regular benthic monitoring should continue to evaluate biological responses to environmental stressors and assess management actions.
A Comparison of the Benthic Macroinvertebrate Communities of Two Ponds in Hawke's Bay, Northern Peninsula
Author: Sabir Bin MuzaffarPublisher:
ISBN:
Category : Benthic animals
Languages : en
Pages : 100
Book Description
A Comparison of Benthic Macroinvertebrate Community Diversity from Five Substrate Types in the Clear Fork, Mohican River
Author: David R. BartonPublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 148
Book Description
A Comparison of the Benthic Macroinvertebrate Communities of Tyler East Reservoir and Tyler West Reservoir, Texas
Author: Jan Jordan JenningsPublisher:
ISBN:
Category : Lake ecology
Languages : en
Pages : 252
Book Description
A Physicochemical Analysis and Comparison of the Benthic Macroinvertebrate Communities of Ward Branch and Six Mile Creek, Texas
Author: Joseph Paul FordPublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 282
Book Description