Download or read book A Comparison of the Benthic Macroinvertebrate Communities of Two Ponds in Hawke s Bay Northern Peninsula written by Sabir Bin Muzaffar and published by . This book was released on 1998 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Benthic Macroinvertebrate Community Diversity from Five Substrate Types in the Clear Fork Mohican River written by David R. Barton and published by . This book was released on 1973 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Historical Comparison and Habitat Associations of Benthic Macroinvertebrate Communities in Southern Green Bay Lake Michigan written by Cadie Olson and published by . This book was released on 2021 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Feasibility of Combining Two Aquatic Benthic Macroinvertebrate Community Databases for Water quality Assessment written by Bernard N. Lenz and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Benthic Macroinvertebrate Community Structure from Four Littoral Zone Habitats of Hodgson Lake written by Robert Bruce Gillespie and published by . This book was released on 1982 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Water Quality and Benthic Macroinvertebrate Communities in Upper Charlotte Harbor and Adjacent Residential Canals written by Richard Cantrell and published by . This book was released on 1977* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Physicochemical Analysis and Comparison of the Benthic Macroinvertebrate Communities of Ward Branch and Six Mile Creek Texas written by Joseph Paul Ford and published by . This book was released on 1998 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Benthic Macroinvertebrate Bioassessment of Looney Creek Harlan County Kentucky written by Cynthia S. Glenn and published by . This book was released on 2010 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this study was to investigate the benthic macroinvertebrate communities of Looney Creek, a headwater tributary of the Poor Fork of the Cumberland River which originates on Black Mountain in Harlan County, Kentucky. Background research indicates that impacts to Looney Creek have included mining, logging, and improper management of wastewater, flow alteration and to some degree, urban runoff. These impacts have been documented since around 1917. The objectives of this project were to (a) determine the overall biological integrity of Looney Creek, (b) assess the effects of water conditions on benthic macroinvertebrates that are sensitive to nonpoint source pollution (NPS), (c) identify the sites most impacted by NPS pollution, (d) compare the biological metrics of the monitoring stations over one year, and (e) to compare the biological metrics of the upper two sites and the lower sites to the reference Macroinvertebrate Biotic Index (MBI) as defined by Kentucky Division of Water, Standard Operating Procedures (KDOW 2008). Biological investigations included two upstream and two downstream macroinvertebrate sites which were sampled three times (spring, summer, and fall of 2008), and followed the semi-quantitative and qualitative sampling methodology decribed in the (KDOW 2008). A habitat assessment and a MBI were determined for each study site. Scores indicated seasonal differences in MBI metrics which could be influenced by life history strategies of individual species. The overall average MBI results upstream sites indicate an excellent-good water quality designation and poor-fair for the downstream sites. Site 1 appeared to be the most impacted by NPS with the lowest biotic metrics. Overall, Looney Creek Site 4 appeared to be the least impacted by human activities. This is demonstrated through the low numbers of pollution tolerant individuals, the lowest mHBI (Modified Hilsenhoff Biotic Index), diverse functional feeding groups, and the highest habitat assessment scores.
Download or read book Benthic Macroinvertebrate Community Structure in a Backwater Lake of Pool 2 Upper Mississippi River written by and published by . This book was released on 1989 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Patterns of Benthic Macroinvertebrate Communities and Habitat Associations in Temperate Continental Shelf Waters of the Pacific Northwest written by Timothy Seung-chul Lee and published by . This book was released on 2012 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Macroinvertebrates constitute the backbone of megafaunal communities in benthic ecosystems around the globe. Many macroinvertebrates have vital roles in benthic ecosystems, ranging from enhancing habitat complexity to providing staple food sources for other organisms. Regardless of how familiar macroinvertebrates are to the general public, very few studies have attempted to describe benthic macroinvertebrate assemblages across large spatial scale in the continental shelf waters of the Pacific Northwest. This study describes different subtidal macroinvertebrate assemblages off Washington and Oregon based on species-substrata associations and the key species that distinguish one assemblage from another. Two data sets were used for this study: underwater footage collected by the submersible Delta during 1993-1995 geological surveys, and footage collected by the remotely operated vehicle (ROV) Hammerhead during macroinvertebrate surveys in late summer 2011. Footages from these surveys were used to document species-substrata associations and distinguish different assemblages based on species composition similarities and dissimilarities. In addition, I determined if a specific group of invertebrates, Asteroids (Echinodermata), were useful in explaining different assemblage patterns, after all other environmental parameters were taken into account. Findings of this study can be used not only to shed light on the structure of macroinvertebrate communities in the Pacific Northwest, but also as baseline data for future research on the direct and indirect effects of potential offshore installations on macroinvertebrate communities across the continental shelf waters.
Download or read book Benthic Macroinvertebrate Communities of the Penobscot River Maine with Special Reference to Their Role as Water Quality Indicators written by Charles F. Rabeni and published by . This book was released on 2002 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book November 2000 Baseline Characterization of Benthic Macroinvertebrate Communities at Two Candidate Dredged Material Disposal Sites in Buzzards Bay written by Raymond M. Valente and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Benthic Invertebrate Response to Habitat Complexity in South Bay Salt Ponds written by Jessica L. Murphey and published by . This book was released on 2013 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wetlands are unique ecosystems that support specific flora, fauna, hydrology, and geology. These ecosystems increase groundwater availability, improve water quality, decrease flood water impacts, and help decrease shoreline erosion. In the South San Francisco Bay, the South Bay Salt Pond Restoration Project is restoring over 6,000 hectares of former salt ponds to tidal marshes and managed pond habitats. These habitats will support endangered species as well as migratory birds, diving ducks, invertebrates, and algal species. Benthic invertebrates are a vital piece of the South Bay food web as they provide the sustenance for other invertebrates, fish, shorebirds, and waterfowl. Improving the health of benthic communities in existing ponds is expected to attract more birds to those ponds and improve the overall health of the South Bay. This study assessed the relationship between invertebrate diversity, species richness, and density at two types of structures--bird islands and wood posts--in two managed ponds in the South Bay. Neither structure significantly affected these benthic parameters, although there was a trend toward more organisms and diversity at structure versus non-structure sites. Differences were significant between ponds and seasons. The results of this work can be used by resource managers to maintain or improve current levels of avian foraging in existing ponds through appropriate pond management in the South Bay salt ponds.
Download or read book Numerical Growth and Secondary Production Responses of the Benthic Macroinvertebrate Community to Whole lake Enrichment in Insular Newfoundland written by Keith Clarke and published by . This book was released on 1995 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Benthic Macroinvertebrate Communities as Indicators of Pollution in the Elizabeth River Hampton Roads Virginia written by Michael Donald Richardson and published by . This book was released on 1971 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Community Structure and Production of Benthic Macroinvertebrates in 0 04 ha Ponds with and Without Organic Loading written by William George Deutsch and published by . This book was released on 1988 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Benthic Macroinvertebrate Communities as Indicators of Reconstructed Freshwater Tidal Wetlands in the Anacostia River Washington written by Kevin D. Brittingham and published by . This book was released on 2011 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considerable work has been conducted on the benthic communities of inland aquatic systems and brackish water estuarine wetlands, but there remains a scarcity of effort on freshwater tidal wetlands. This study characterized the benthic macroinvertebrate communities of recently reconstructed urban freshwater tidal wetlands along the Anacostia River in Washington, D.C. The focus of the study was Kingman Marsh, which was reconstructed by the U.S. Army Corps of Engineers in 2000 using Anacostia dredge material. Populations from this "new" marsh were compared to those of the similar, but earlier reconstructed Kenilworth Marsh (1993) just one half mile upstream, the relic reference Dueling Creek Marsh in the upper Anacostia estuary and the outside reference Patuxent freshwater tidal marsh in an adjacent watershed. Benthic macroinvertebrate organisms were collected using a range of techniques including the Ekman bottom grab sampler, D-net and Hester-Dendy sampler. Samples were collected at least seasonally from tidal channels, tidal mudflats, three vegetation/sediment zones (low, middle and high marsh), and pools over a 3-year period (late 2001-2004). The macroinvertebrate communities present at the marsh sites reflected levels of disturbance, stress, and pollution, all of which are effects of urbanization in the watershed. There were also similarities between older reconstructed wetlands and remnant wetlands indicating an age factor in comparisons of macroinvertebrate communities. Macroinvertebrate density was significantly greater at Kingman Marsh than Kenilworth Marsh due to more numerous chironomids and oligochaetes. This may reflect an increase in unvegetated sediments at Kingman (even at elevations above natural mudflat) due to grazing pressure from over-abundant resident Canada geese. Unvegetated sediments yielded greater macroinvertebrate abundance but lower richness than vegetated marsh sites. Data collected from this study provides information on the extent to which benthic macroinvertebrate communities can serve as indicators of a functional reconstructed freshwater tidal marsh.
