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 A Benthic Habitat Template for Pacific Canada s Continental Shelf written by E. J Gregr and published by . This book was released on 2016 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Classifications of the marine environment are essential to inform marine spatial planning strategies such as protected area designation, and can support assessments of the cumulative impacts of human activities and the development of species-habitat associations. The benthic habitat template developed here for the shelf waters (30 - 500 m) of Canada's Pacific coast is one such classification. The template differs from more common correlation-based approaches in that it uses hypotheses grounded in functional ecology to integrate physical data into a functional description of the benthic environment. We adapted methods originally used on Canada's Atlantic coast to the available data and unique characteristics of Canada's Pacific coast. We found the habitat template correlated better with benthic diversity than linear geographic distance, corroborating earlier findings from Atlantic Canada. The habitat template, particularly the Disturbance axis, was negatively correlated with the Shannon-Weiner biodiversity index, showing that high disturbance habitats are less diverse. These results demonstrate that the template, by considering the influence of physical drivers on functional adaptation in the classification process, represents an ecologically relevant classification of the marine environment. As such, it has the potential to contribute to Canada's Marine Protected Area strategy by identifying areas of rarity, high diversity, and representativity, important determinants of Ecologically or Biologically Significant Areas (EBSAs). Also, the ability to correlate species diversity with distance provides a way to quantitatively identify ecologically significant regional boundaries, something that is critical to understanding the ecology on the coast, and a potentially important refinement to questions of representativity. We expect both the habitat template and the associated sediment grain size model to serve key roles for marine spatial planning on Canada's Pacific Coast."--Abstract.
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 A Benthic Habitat Template for Pacific Canada s Continental Shelf written by Canada. Department of Fisheries and Oceans and published by . This book was released on 2016 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Classification of Regional Patterns of Environmental Drivers and Benthic Habitats in Pacific Northwest Estuaries written by Henry Lee and published by . This book was released on 2009 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Relating Benthic Macroinvertebrate Community Composition and Habitat Complexity written by Scott C. Fetherston and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Trophic Relations of Benthic Macroinvertebrate Communities of Brannian Creek Whatcom County written by Brian Donald Liming and published by . This book was released on 1978 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Baseline Assessment of Fish Communities Benthic Macroinvertebrate Communities and Stream Habitat and Land Use Big Thicket National Preserve Texas 1999 2001 written by James Bruce Moring and published by . This book was released on 2003 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Macroinvertebrates of the Pacific Northwest written by Jeff Adams and published by . This book was released on 2003 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Benthic Invertebrate Macrofauna of the Eastern Continental Shelf of the Bering and Chukchi Seas written by Sam W. Stoker and published by . This book was released on 1978 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall view presented by this study is of closely interrelated Bering/Chukchi benthic community system that extends unbroken over the entire continental shelf, with the Chukchi Sea benthos probably relying heavily on the Bering Sea for both food supply and possibly recruitment. Indications are that this is a highly productive and relatively stable benthic system comprised of at least eight major faunal zones of considerable complexity. The environmental factor correlating most strongly with the distribution of these faunal zones and with distribution of individual major species appears to be sediment type, though summer bottom temperature may also be critical. The distribution of standing stock biomass in relation to diversity suggests predation pressure on the southern and northern extremes of the study area, presumably the result of benthic-feeding marine mammal populations and possibly, in the case of the southern region, demersal fish. In general terms it appears to be a strongly detrital-based trophic system, with an elevated standing stock biomass observed in the Bering Strait and southern Chukchi Sea region, probably the combined result of high near-surface primary productivity distributions and current structure. The benthic fauna over this region appears to be dominated by boreal Pacific forms, probably also a result of the current structure, with high Arctic forms frequent only in the northern waters.
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 Influence of Environmental Variations on Species Diversity in Benthic Communities of the Continental Shelf and Slope written by John Frederick Grassle and published by . This book was released on 1974 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Benthic Indices Across Nested Ecoregions of the Pacific Northwest written by Elaina R. Holburn and published by . This book was released on 2005 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Environmental Variation on Species Diversity in Benthic Communities of the Continental Shelf and Slope written by John Frederick Grassle and published by . This book was released on 1967 with total page 388 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 The Response of Benthic Macroinvertebrate Communities to Organic Pollution in Blockhouse Creek Lycoming Tioga Cos PA written by Rebecca F. Surdick and published by . This book was released on 1972 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
