Author: Amy Bruenderman HillPublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 122
Book Description
Seasonal Changes in a Benthic Macroinvertebrate Community of a North Cascades Mountain Stream
Author: Amy Bruenderman HillPublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 122
Book Description
Benthic Macroinvertebrate Community Composition and Distribution Related to Seasonal and Geochemical Changes in a Chronically Acidified Stream
Author: Darlene Marie MadarishPublisher:
ISBN:
Category : Acid pollution of rivers, lakes, etc
Languages : en
Pages : 470
Book Description
Seasonal Changes of Benthic Macroinvertebrate Communities in Southwestern British Columbia
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
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).
Selected Water Resources Abstracts
Author: Detecting Changes in the Benthic Invertebrate Community Structure of Minimally Impacted Streams in the North Cascades of Washington State
Author: Ashley K. RawhouserPublisher:
ISBN:
Category : Benthos
Languages : en
Pages : 144
Book Description
Ecology and Classification of North American Freshwater Invertebrates
Author: James H. ThorpPublisher: Elsevier
ISBN: 0080530672
Category : Science
Languages : en
Pages : 1073
Book Description
The First Edition of Ecology and Classification of North American Freshwater Invertebrates has been immensely popular with students and researchers interested in freshwater biology and ecology, limnology, environmental science, invertebrate zoology, and related fields. The First Edition has been widely used as a textbook and this Second Edition should continue to serve students in advanced classes. The Second Edition features expanded and updated chapters, especially with respect to the cited references and the classification of North American freshwater invertebrates. New chapters or substantially revised chapters include those on freshwater ecosystems, snails, aquatic spiders, aquatic insects, and crustaceans. - Most up-to-date and informative text of its kind - Written by experts in the ecology of various invertebrate groups, coverage emphasizes ecological information within a current taxonomic framework - Each chapter contains both morphological and taxonomic information, including keys to North American taxa (usually to the generic level) as well as bibliographic information and a list of further readings - The text is geared toward researchers and advanced undergraduate and graduate students
Biomonitoring Under Changing Climate Conditions
Author: Vanessa A. BournePublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The vast "Ring of Fire" region, at the interface of the Boreal Shield and Hudson Plains ecozones in the far north of Ontario, Canada, is considered to be one of the most promising mineral exploration areas in Ontario in almost a century. The region is undeveloped and remote, accessible only by air, water or winter road. Multiple stresses to the natural ecosystems are anticipated with mining development, in a time of climate change which is predicted to significantly impact hydrological and temperature regimes (intensified spring freshet, more high discharge events, warmer temperatures for longer). Preserving and protecting the aquatic ecosystems in this pristine region will require effective baseline environmental monitoring in advance of development. Quantifying seasonal variation of habitat characteristics and benthic macroinvertebrate (BMI) communities, and assessing the seasonal difference between ecozones are considered key challenges in designing effective monitoring programs. In this study, I examined seasonal variability in habitat characteristics and BMI communities by sampling 43 stream sites distributed across the two ecozones. In 2015 each site was sampled three times during the open water season: post-freshet, mid-summer and fall. BMI communities varied among sampling seasons, but less variation was observed between the post-freshet and summer sampling periods than either of these compared to the fall. Ordination analyses of BMI communities identified to the family level indicated that sites from the same sampling season were more likely to group together. Water temperature, stream velocity and canopy coverage were the key factors associated with seasonal differences in benthic macroinvertebrates. Differences in location of the sampling sites across the two ecozones did not significantly impact seasonal variability, but differences may have been constrained by the common habitat features used because of the sampling protocol. Conducting sampling during the post-freshet or summer seasons is recommended for future stream bioassessments to reduce the influence of seasonal variability and thus ensure comparability over time.
Stream Ecology
Author: James R. BarnesPublisher: Springer Science & Business Media
ISBN: 1461337755
Category : Science
Languages : en
Pages : 396
Book Description
Most of the papers included here were part of the Plenary Sym posium on The Testing of General Ecological Theory in Lotic Ecosys tems held in conjunction with the 29th Annual Meeting of the North American Benthological Society in Provo, Utah, April 28, 1981. Sev eral additional papers were solicited, from recognized leaders in certain areas of specialization, in order to round out the coverage. All of the articles have been critiqued by at least two or three re viewers and an effort was made to rely on authorities in stream and theoretical ecology. In all cases this has helped to insure accur acyand to improve the overall quality of the papers. However, as one of our purposes has been to encourage thought-provoking and even controversial coverage of the topics, material has been retained even though it may upset certain critical readers. It is our hope that these presentations will stimulate further research, encourage the fuller development of a theoretical perspective among lotic ecologists, and lead to the testing of general ecological theories in the stream environment.
Macroinvertebrate Community Structure and Function in Seasonal, Low-land, Tropical Streams Across a Pristine-rural-Urban Land-use Gradient
Author: Julie Elizabeth HelsonProceedings
Author: Ecological Society of AustraliaPublisher:
ISBN:
Category :
Languages : en
Pages : 964
Book Description