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Patterns Of Variation In The Benthic Macroinvertebrate Community Of The Upper Columbia River
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Book Synopsis Patterns of Variation in the Benthic Macroinvertebrate Community of the Upper Columbia River by : Sarah J. Hindle
Download or read book Patterns of Variation in the Benthic Macroinvertebrate Community of the Upper Columbia River written by Sarah J. Hindle and published by . This book was released on 2018 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 2. "In the summers of 2007-2010, the Spokane Tribe of Indians collected benthic macroinvertebrates (BMIs) from the Upper Columbia River using three techniques: benthic sled, benthic drift, and artificial substrates. An analysis of the samples collected by these methods revealed significant discrepancies in the types of organisms caught. Benthic sled and drift methods collected mainly planktonic taxa, primarily small crustaceans. This varies significantly from the community structure of the artificial substrate samples (p
Book Synopsis Spatial Variation in Macroinvertebrates in Groundwater-dominated Rivers by : Kirby Lynn McCready Wright
Download or read book Spatial Variation in Macroinvertebrates in Groundwater-dominated Rivers written by Kirby Lynn McCready Wright and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic macroinvertebrate communities in riverine ecosystems are shaped by both local and large-scale influences. Most models of riverine community structure are grouped into either discrete or continuum conceptual models. However, there is much uncertainty in how these two classes of conceptual models apply to macroinvertebrate communities in the physicochemically consistent headwaters of spring-influenced rivers. This thesis examined benthic macroinvertebrate community composition and biomass among local discrete geomorphic mesohabitats (riffles, runs, and pools) and along an upstream to downstream gradient in two spring-fed rivers in central Texas (San Marcos River and Comal River, Hays County). The goal of my thesis was to examine the relative importance of downstream distance from springhead versus smaller-scale habitat conditions (i.e., mesohabitat units) in explaining the variation in macroinvertebrate community structure in these two spring-based subtropical riverine systems. I hypothesized that, because I sample in the upper physicochemically consistent reaches of both rivers that local mesohabitat conditions would explain more variation in community composition than downstream distance from springhead. I expected this change in community composition would be driven by replacement of taxa rather than differences in taxonomic richness. I also predicted that non-native benthic species would be more evenly distributed throughout the study reaches due to the consistency of physicochemical conditions. Finally, I predicted that the distribution of taxa specific biomass contributions will follow patterns seen in community composition change and will reflect taxonomic density estimates. To test these hypotheses, I sampled macroinvertebrates and local habitat parameters from mesohabitat types along three reaches in the first ~4 km of each river. I also determined biomass of each taxon and community-wide patterns of biomass distribution of benthic macroinvertebrates. I found that variation in taxonomic composition in both rivers was driven to a greater or equal amount by upstream to downstream distance from spring-influence, and by mesohabitat type. Taxonomic diversity did not vary with distance from springhead but was consistently lower in pool mesohabitats when compared to runs and riffles in both rivers. Compositional changes and patterns in b-diversity within mesohabitat types among study reaches indicated that replacement (as opposed to richness differences) was the main mechanism leading to patterns of b-diversity. I found that a non-native snail (Tarebia granifera) and an endemic spring snail (Elimia comalensis) appear to be spatially partitioning habitat in an upstream- to downstream manner. Finally, I found that Tarebia granifera constituted the largest proportion of benthic macroinvertebrate biomass in several study reaches downstream from springheads.
Book Synopsis Seasonal Changes of Benthic Macroinvertebrate Communities in Southwestern British Columbia by :
Download or read book Seasonal Changes of Benthic Macroinvertebrate Communities in Southwestern British Columbia written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abundance patterns in the small coastal and interior streams were related to the timing of invertebrate life cycles whereas abundance was related to life cycles and the spring freshet in the large rivers. [...] Coefficients of variation were determined for the ordinations of the genus/species, family, and functional data and for the ordination of the environmental variables, that change seasonally. [...] The discharge level achieved and the duration depends on the depth of the snow pack and the speed of melting. [...] The extreme temperatures in the interior increase the rate of weathering of the sedimentary rocks and result in hardwater streams with high alkalinity, high conductivity, and a slightly basic pH (Table 2.1). [...] The Fraser and the Thompson have an intermediate alkalinity, and a conductivity and pH similar to the interior streams (Table 2.1).
Book Synopsis Macroinvertebrate Functional Organization, Diversity, and Life History Variation Along a Sierra Nevada River Continuum, California by : Richard Lee Bottorff
Download or read book Macroinvertebrate Functional Organization, Diversity, and Life History Variation Along a Sierra Nevada River Continuum, California written by Richard Lee Bottorff and published by . This book was released on 1990 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Patterns of Benthic Macroinvertebrate Communities and Habitat Associations in Temperate Continental Shelf Waters of the Pacific Northwest by : Timothy Seung-chul Lee
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.
Book Synopsis Benthic Macroinvertebrate Community Structure in Relation to Water Quality and Habitat in the Upper Pecos River, Texas by : Greg L. Larson
Download or read book Benthic Macroinvertebrate Community Structure in Relation to Water Quality and Habitat in the Upper Pecos River, Texas written by Greg L. Larson and published by . This book was released on 1996 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatial Variation of Benthic Macroinvertebrate Communities in Low-order Streams by : Alysia Helena Perry
Download or read book Spatial Variation of Benthic Macroinvertebrate Communities in Low-order Streams written by Alysia Helena Perry and published by . This book was released on 2000 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Benthic Macroinvertebrate Metacommunity Structure of the Guadalupe River Basin, TX by : Rebecca A. Zawalski
Download or read book Benthic Macroinvertebrate Metacommunity Structure of the Guadalupe River Basin, TX written by Rebecca A. Zawalski and published by . This book was released on 2017 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Benthic macroinvertebrates (BMI) are widely used as bio-indicators for local in-stream quality. However, local community structure can be affected by smaller scale (local) environmental conditions and larger scale processes. I assessed the abundance and diversity of BMI and their relationship with local in-stream conditions, regional patterns of land-use/land cover (LULC), and large scale physiographic gradients across the Guadalupe River System, a large basin (3,256 km2) in Central Texas. Macroinvertebrates, water quality, and habitat conditions across 28 sites in the Guadalupe River and its main tributaries were sampled. Highest species diversity occurred near the headwaters, and decreased downstream. Pollution tolerance levels increased downstream and followed an increasing agriculture gradient. Landscape factors explained a large proportion of variation in macroinvertebrate community structure (38%), but 16% of it was spatially structured (shared with spatial factors latitude and longitude) and 4% was explained by spatial factors alone. Local environmental factors were strongly correlated with landscape factors and explained similar amount of variation as landscape factors. My study highlights the importance of incorporating physiographic gradients when examining local and regional diversity and composition of BMI communities, especially in large complex watersheds. My results will help develop more effective monitoring programs for larger river systems.
Book Synopsis Biodiversity and Genetic Structure of Benthic Macroinvertebrates Along an Altitudinal Gradient by : Lauren Pulliam
Download or read book Biodiversity and Genetic Structure of Benthic Macroinvertebrates Along an Altitudinal Gradient written by Lauren Pulliam and published by . This book was released on 2016 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Altitudinal gradients in Sub-Antarctic freshwater systems present unique opportunities to study the effect of distinct environmental gradients on benthic macroinvertebrate community composition and dispersal. This study investigates patterns in biodiversity, dispersal and population genetic structure of benthic macroinvertebrate fauna across an altitudinal gradient between two watersheds on Navarino Island in southern Chile. Patterns in diversity, density, evenness and functional feeding groups were not significantly different across the altitudinal gradient in both the Windhond and Róbalo Rivers. Taxa richness in both rivers generally increased from the headwaters of the river to the mouth, and functional feeding group patterns were consistent with the predictions of the River Continuum Concept. Population genetic structure and gene flow was investigated by sampling the mitochondrial cytochrome oxidase I gene in two invertebrate species with different dispersal strategies. Hyalella simplex (Amphipoda) is an obligate aquatic species, and Meridialaris chiloeense (Ephemeroptera) is an aquatic larvae and a terrestrial winged adult. Contrasting patterns of population genetic structure were observed. Results for Hyalella simplex indicate significant differentiation in genetic structure in the Amphipod populations between watersheds and lower genetic diversity in the Róbalo River samples, which may be a result of instream dispersal barriers. Meridialaris chiloeense exhibited weak population structure but higher genetic diversity, which suggests this species is able to disperse widely as a winged adult.
Book Synopsis Influence of Sampling Methodologies on Descriptors and Ecological Indicators of Aquatic Benthic Macroinvertebrates by : Maurizio Pinna
Download or read book Influence of Sampling Methodologies on Descriptors and Ecological Indicators of Aquatic Benthic Macroinvertebrates written by Maurizio Pinna and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Benthic Macroinvertebrate Community Structure in a Backwater Lake of Pool 2, Upper Mississippi River by :
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:
Book Synopsis Benthic Macroinvertebrate Variations Due to Different Stream Impacts in the York River Watershed by : Rebecca Jo Thomas
Download or read book Benthic Macroinvertebrate Variations Due to Different Stream Impacts in the York River Watershed written by Rebecca Jo Thomas and published by . This book was released on 2002 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Benthic Macroinvertebrate Community in the Clear Fork of the Blackwater River by : Charles G. Pierce
Download or read book The Benthic Macroinvertebrate Community in the Clear Fork of the Blackwater River written by Charles G. Pierce and published by . This book was released on 1983 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Conservation Planning for Climate Change by : Seth White
Download or read book Conservation Planning for Climate Change written by Seth White and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temporal Patterns of Aquatic Macroinvertebrate Communities and Organic Matter Standing Stock Availability in a Coastal Floodplain (Altamaha River, Georgia) by : Erica L. Johnson
Download or read book Temporal Patterns of Aquatic Macroinvertebrate Communities and Organic Matter Standing Stock Availability in a Coastal Floodplain (Altamaha River, Georgia) written by Erica L. Johnson and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's Abstract: River floodplain habitats of the Southeastern United States are sites of high biological productivity that rely on a predictable flooding event as a keystone process. This study took place in a river-floodplain area of the Altamaha River, an unimpounded large-order river in the Coastal Plains region of the US. This study aims to investigate how aquatic macroinvertebrate communities changed over the course of the annual flood pulse. I predicted that the communities would be different and that the differences would be driven by hydrology at the main stem and organic matter standing stock availability. I took quantitative samples of benthic macroinvertebrates monthly from December 2011-April 2012 and from December 2012- April 2014. Invertebrate abundance was assessed and biomass was obtained using published length-mass regressions. Year 1 (2011-2012) was characterized by severe drought. And Year 2 was characterized by a large flooding event. There was a significant difference between the communities. In year 1 the community was influenced by hydrology and high FBOM standing stocks. In year 2 the community was influenced by hydrology and low CBOM standing stocks. This study shows the importance of a flooding event in river floodplain systems and supports the idea that floodplains act as a source of organic matter to the main stem and are sites of high biological productivity especially from aquatic macroinvertebrates. As unimpounded rivers are becoming increasingly rare, it is important to understand how these systems function in both normal and abnormal (i.e., drought vs. flood) conditions.
Book Synopsis Benthic Macroinvertebrate Community Structure and Physico-chemical Conditions in the Cranberry River, Nicholas County, West Virginia by : James A. Meadows
Download or read book Benthic Macroinvertebrate Community Structure and Physico-chemical Conditions in the Cranberry River, Nicholas County, West Virginia written by James A. Meadows and published by . This book was released on 1986 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rivers of North America by : Michael D. Delong
Download or read book Rivers of North America written by Michael D. Delong and published by Academic Press. This book was released on 2023-04-20 with total page 1109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rivers of North America, Second Edition features new updates on rivers included in the first edition, as well as brand new information on additional rivers. This new edition expands the knowledge base, providing readers with a broader comparative approach to understand both the common and distinct attributes of river networks. The first edition addressed the three primary disciplines of river science: hydrology, geomorphology, and ecology. This new edition expands upon the interactive nature of these disciplines, showing how they define the organization of a riverine landscape and its processes. An essential resource for river scientists working in ecology, hydrology, and geomorphology. Provides a single source of information on North America’s major rivers Features authoritative information on more than 200 rivers from regional specialists Includes full-color photographs and topographical maps to illustrate the beauty, major features, and uniqueness of each river system Offers one-page summaries help readers quickly find key statistics and make comparisons among rivers
