Macroinvertebrate Community Structure And Feeding Dynamics In Three Forested Headwater Streams In Central Maine

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Macroinvertebrate Community Structure and Feeding Dynamics in Three Forested Headwater Streams in Central Maine

Author : Emily R. Arsenault
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (897 download)

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Book Synopsis Macroinvertebrate Community Structure and Feeding Dynamics in Three Forested Headwater Streams in Central Maine by : Emily R. Arsenault

Download or read book Macroinvertebrate Community Structure and Feeding Dynamics in Three Forested Headwater Streams in Central Maine written by Emily R. Arsenault and published by . This book was released on 2014 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: Headwater streams have some of the best quality water in the country (Dissmeyer 2000). Because headwaters eventually flow into other downstream water bodies like rivers and lakes, they are important places to focus research and conservation efforts. All streams in this study had good water quality based on several assessments of macroinvertebrate communities. 1. Judging from metrics of abundance, richness, EPT, and HBI, all study streams had very good water quality. Thirty-nine total families were observed among the three streams. Whittier Stream was the least healthy of the three, most likely as a result of human disturbances such as a road crossing, fishpond, and mill remnants. It is probable these habitat alterations are having an effect on downstream benthic communities. 2. The riparian zone of each stream was forested and stable, but there were some eroding banks at some points along the study reaches. The abundance of sensitive macroinvertebrates (measured using representative Orders Ephemeroptera, Plecoptera, and Trichoptera) increased with increasing percent canopy cover and decreased with high percentages of sand characterizing the streambed. 3. Macroinvertebrates can be categorized into functional feeding groups based on feeding behavior. Shredders should hypothetically be in high abundance in headwater streams due to high riparian organic matter inputs. However, observed shredders were limited. This may be due to seasonal changes in functional feeding group ratios. In addition, all study streams had a predator/prey ratio that was higher than the ratio expected for a typical stream, which suggests that there might be an abundance of prey biomass in the study stream headwaters. 4. Based on results from stable isotope analysis of carbon and nitrogen, most macroinvertebrates within the study streams seem to be omnivorous. The most complex food web was observed at Stony Brook. Food webs of Beaver Brook and Stony Brook showed similar trophic clustering, a pattern that might be indicative of streams with excellent water quality.

The Relationships Between Headwater Stream Macroinvertebrate Communities and Summer Low-flow Events in a Temperate Rain Forest

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (68 download)

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Book Synopsis The Relationships Between Headwater Stream Macroinvertebrate Communities and Summer Low-flow Events in a Temperate Rain Forest by :

Download or read book The Relationships Between Headwater Stream Macroinvertebrate Communities and Summer Low-flow Events in a Temperate Rain Forest written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a forested headwater stream system as a model, the effects of inter-annual variation in summer discharge regimes on aquatic insect communities were investigated. More specifically, the benthic invertebrate community response to the intensity, minimum discharges, frequency, duration and abruptness of summer low-flow events were examined. We hypothesized that intensification of summer low-flow events, both in duration and magnitude, have some negative impacts on benthic macroinvertebrate communities in riffles. Examples of negative impacts include reduction in their abundance and/or biodiversity. First, the abundance and functional trait data of the benthic macroinvertebrates in the three streams in the Malcolm Knapp Research Forest, British Columbia, Canada, were analyzed with respect to the low-flow events. Second, population models were built to simulate the potential responses of lotic aquatic insect communities to future climate change scenarios that differ in the rate of intensifications in extreme flow events: a low-flow event scenario within the current range versus 10% increase in intensity. The summer low-flow events were found to have a significant relationship with benthic macroinvertebrate communities through three-table ordinations of the empirical data. The community structure was correlated with a major ocean-atmosphere regime shift (Pacific Decadal Oscillation). The intensity and duration of low-flow events explained the observed shift in community structure favouring r-selected traits (e.g. short life cycle, high reproduction rate). The two low-flow severity scenarios showed the significant differential impacts on the aquatic insect community structures when individual populations were modeled according to their traits. Aquatic insects could be separated into three groups according to their sensitivities, measured by extinction rates, toward the two scenarios.

Assemblage Structure, Production, and Food Web Dynamics of Macroinvertebrates in Tropical Island Headwater Streams

Author : Keysa G. Rosas-Rodriguez
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (998 download)

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Book Synopsis Assemblage Structure, Production, and Food Web Dynamics of Macroinvertebrates in Tropical Island Headwater Streams by : Keysa G. Rosas-Rodriguez

Download or read book Assemblage Structure, Production, and Food Web Dynamics of Macroinvertebrates in Tropical Island Headwater Streams written by Keysa G. Rosas-Rodriguez and published by . This book was released on 2016 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Variation in long-term temperature and precipitation patterns will likely influence the decomposition and export of benthic organic matter and influence aquatic macroinvertebrate consumer communities. Tropical systems are relatively understudied; therefore basal information is urgently needed. As part of an ongoing long-term study, we monitored macroinvertebrates in two shrimp-dominated and fishless headwater streams within the Luquillo Experimental Forest in Puerto Rico from 2009-2010. We combined growth rates with yearly biomass data to calculate secondary production and examined gut contents to develop quantitative food webs. Macroinvertebrate assemblages were dominated by a few insect taxa, with similar biotic composition across streams and habitats, but different structure amongst habitats. Biomass and abundance were generally greater in pools, suggesting that pools may provide habitat stability and shelter. Alternatively, shrimp may provide secondary benefits by removing fine sediments given their high density of in pools. Overall, aquatic insects had low biomass; therefore, their production was relatively low as is the case in most tropical areas. However, their turnover rates were not as high as expected. Secondary production appears to rely more on amorphous detritus and allochthonous organic matter rather than algal resources. These data are an important first step towards predicting the long-term effects that expected changes in rainfall and discharge will have in tropical stream communities.

The Biology of Streams and Rivers

Author : Paul S. Giller
Publisher : Oxford University Press
ISBN 13 : 9780198549772
Total Pages : 308 pages
Book Rating : 4.5/5 (497 download)

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Book Synopsis The Biology of Streams and Rivers by : Paul S. Giller

Download or read book The Biology of Streams and Rivers written by Paul S. Giller and published by Oxford University Press. This book was released on 1998-11-26 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to provide an accessible, up-to-date introduction to stream and river biology. Beginning with the physical features that define running water habitats, the book goes on to look at these organisms and their ecology.

Ecology Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 398 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Ecology Abstracts by :

Download or read book Ecology Abstracts written by and published by . This book was released on 1996 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.

Methods to Study Litter Decomposition

Author : Felix Bärlocher
Publisher : Springer Nature
ISBN 13 : 3030305155
Total Pages : 581 pages
Book Rating : 4.0/5 (33 download)

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Book Synopsis Methods to Study Litter Decomposition by : Felix Bärlocher

Download or read book Methods to Study Litter Decomposition written by Felix Bärlocher and published by Springer Nature. This book was released on 2020-07-30 with total page 581 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this book is to provide students and laboratory instructors at universities and professional ecologists with a broad range of established methods to study plant litter decomposition. Detailed protocols for direct use in the field or laboratory are presented in an easy to follow step-by-step format. A short introduction to each protocol reviews the ecological significance and principles of the technique and points to key references.

Proceedings of The Academy of Natural Sciences (Vol. 144, 1993)

Author :
Publisher : Academy of Natural Sciences
ISBN 13 : 9781437955439
Total Pages : 356 pages
Book Rating : 4.9/5 (554 download)

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Book Synopsis Proceedings of The Academy of Natural Sciences (Vol. 144, 1993) by :

Download or read book Proceedings of The Academy of Natural Sciences (Vol. 144, 1993) written by and published by Academy of Natural Sciences. This book was released on with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Methods in Stream Ecology

Author : F. Richard Hauer
Publisher : Academic Press
ISBN 13 : 0080547435
Total Pages : 894 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Methods in Stream Ecology by : F. Richard Hauer

Download or read book Methods in Stream Ecology written by F. Richard Hauer and published by Academic Press. This book was released on 2011-04-27 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods in Stream Ecology, Second Edition, provides a complete series of field and laboratory protocols in stream ecology that are ideal for teaching or conducting research. This updated edition reflects recent advances in the technology associated with ecological assessment of streams, including remote sensing. In addition, the relationship between stream flow and alluviation has been added, and a new chapter on riparian zones is also included. The book features exercises in each chapter; detailed instructions, illustrations, formulae, and data sheets for in-field research for students; and taxanomic keys to common stream invertebrates and algae. With a student-friendly price, this book is key for all students and researchers in stream and freshwater ecology, freshwater biology, marine ecology, and river ecology. This text is also supportive as a supplementary text for courses in watershed ecology/science, hydrology, fluvial geomorphology, and landscape ecology. Exercises in each chapter Detailed instructions, illustrations, formulae, and data sheets for in-field research for students Taxanomic keys to common stream invertebrates and algae Link from Chapter 22: FISH COMMUNITY COMPOSITION to an interactive program for assessing and modeling fish numbers

Aquatic Invertebrates of the Ganga River System: Mollusca, Annelida, Crustacea (in part)

Author :
Publisher :
ISBN 13 :
Total Pages : 288 pages
Book Rating : 4.0/5 (917 download)

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Book Synopsis Aquatic Invertebrates of the Ganga River System: Mollusca, Annelida, Crustacea (in part) by :

Download or read book Aquatic Invertebrates of the Ganga River System: Mollusca, Annelida, Crustacea (in part) written by and published by . This book was released on 2007 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Comparative Analyses of Ecosystems

Author : Jonathan Cole
Publisher : Springer Science & Business Media
ISBN 13 : 1461231221
Total Pages : 381 pages
Book Rating : 4.4/5 (612 download)

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Book Synopsis Comparative Analyses of Ecosystems by : Jonathan Cole

Download or read book Comparative Analyses of Ecosystems written by Jonathan Cole and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Arising from the third Cary Conference held in 1989, Comparative Analyses of Ecosystems investigates the utility and limitations of cross-system comparisons in ecology. The contributors, all well-known in their field, support their conclusions on the use and meaning of such comparisons by presenting novel analyses of data utilizing a variety of cross-system approaches in marine, freshwater, and terrestrial systems.

Riparian Areas

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309082951
Total Pages : 449 pages
Book Rating : 4.3/5 (9 download)

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Book Synopsis Riparian Areas by : National Research Council

Download or read book Riparian Areas written by National Research Council and published by National Academies Press. This book was released on 2002-10-10 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.

Watershed Hydrology

Author : Vijay P. Singh
Publisher : Allied Publishers
ISBN 13 : 9788177645477
Total Pages : 588 pages
Book Rating : 4.6/5 (454 download)

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Book Synopsis Watershed Hydrology by : Vijay P. Singh

Download or read book Watershed Hydrology written by Vijay P. Singh and published by Allied Publishers. This book was released on 2003 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Guide to the Freshwater Aquatic Microdrile Oligochaetes of North America

Author : Ralph O. Brinkhurst
Publisher : Fisheries and Oceans, Scientific Information and Publications Branch
ISBN 13 : 9780660119243
Total Pages : 259 pages
Book Rating : 4.1/5 (192 download)

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Book Synopsis Guide to the Freshwater Aquatic Microdrile Oligochaetes of North America by : Ralph O. Brinkhurst

Download or read book Guide to the Freshwater Aquatic Microdrile Oligochaetes of North America written by Ralph O. Brinkhurst and published by Fisheries and Oceans, Scientific Information and Publications Branch. This book was released on 1986 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt:

American Doctoral Dissertations

Author :
Publisher :
ISBN 13 :
Total Pages : 896 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis American Doctoral Dissertations by :

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1995 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Nutrient Criteria Technical Guidance Manual

Author :
Publisher :
ISBN 13 :
Total Pages : 258 pages
Book Rating : 4.3/5 (121 download)

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Book Synopsis Nutrient Criteria Technical Guidance Manual by :

Download or read book Nutrient Criteria Technical Guidance Manual written by and published by . This book was released on 2000 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Riverine Ecosystem Synthesis

Author : James H. Thorp
Publisher : Elsevier
ISBN 13 : 0080888003
Total Pages : 233 pages
Book Rating : 4.0/5 (88 download)

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Book Synopsis The Riverine Ecosystem Synthesis by : James H. Thorp

Download or read book The Riverine Ecosystem Synthesis written by James H. Thorp and published by Elsevier. This book was released on 2010-07-27 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most comprehensive model yet for describing the structure and functioning of running freshwater ecosystems. Riverine Ecosystems Synthesis (RES) is a result of combining several theories published in recent decades, dealing with aquatic and terrestrial systems. New analyses are fused with a variety of new perspectives on how river network ecosystems are structured and function, and how they change along longitudinal, lateral, and temporal dimensions. Among these novel perspectives is a dramatically new view of the role of hydrogeomorphic forces in forming functional process zones from headwaters to the mouths of great rivers. Designed as a useful tool for aquatic scientists worldwide whether they work on small streams or great rivers and in forested or semi-arid regions, this book will provide a means for scientists to understand the fundamental and applied aspects of rivers in general and includes a practical guide and protocols for analyzing individual rivers. Specific examples of rivers in at least four continents (Africa, Australia, Europe and North America) serve to illustrate the power and utility of the RES concept. Develops the classic, seminal article in River Research and Applications, "A Model of Biocomplexity in River Networks Across Space and Time" which introduced the RES concept for the first time A guide to the practical analysis of individual rivers, extending its use from pristine ecosystems to modern, human-modified rivers An essential aid both to the study fundamental and applied aspects of rivers, such as rehabilitation, management, monitoring, assessment, and flow manipulation of networks

Restoration of Aquatic Ecosystems

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 9780309045346
Total Pages : 580 pages
Book Rating : 4.0/5 (453 download)

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Book Synopsis Restoration of Aquatic Ecosystems by : National Research Council

Download or read book Restoration of Aquatic Ecosystems written by National Research Council and published by National Academies Press. This book was released on 1992-01-01 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aldo Leopold, father of the "land ethic," once said, "The time has come for science to busy itself with the earth itself. The first step is to reconstruct a sample of what we had to begin with." The concept he expressedâ€"restorationâ€"is defined in this comprehensive new volume that examines the prospects for repairing the damage society has done to the nation's aquatic resources: lakes, rivers and streams, and wetlands. Restoration of Aquatic Ecosystems outlines a national strategy for aquatic restoration, with practical recommendations, and features case studies of aquatic restoration activities around the country. The committee examines: Key concepts and techniques used in restoration. Common factors in successful restoration efforts. Threats to the health of the nation's aquatic ecosystems. Approaches to evaluation before, during, and after a restoration project. The emerging specialties of restoration and landscape ecology.