Response of Two Species of Midge (family Chironomidae) to Cadmium and PH
Author : Doyle Holbird
Publisher :
Page : 134 pages
File Size : 12,52 MB
Release : 1995
Category :
ISBN :
Author : Doyle Holbird
Publisher :
Page : 134 pages
File Size : 12,52 MB
Release : 1995
Category :
ISBN :
Author : P.D. Armitage
Publisher : Springer Science & Business Media
Page : 579 pages
File Size : 33,60 MB
Release : 2012-12-06
Category : Science
ISBN : 9401107157
The dipteran family Chironomidae is the most widely distributed and frequently the most abundant group of insects in freshwater, with rep resentatives in both terrestrial and marine environments. A very wide range of gradients of temperature, pH, oxygen concentration, salinity, current velocity, depth, productivity, altitude and latitude have been exploited, by at least some chironomid species, and in grossly polluted environments chironomids may be the only insects present. The ability to exist in such a wide range of conditions has been achieved largely by behavioural and physiological adaptations with relatively slight morphological changes. It has been estimated that the number of species world-wide may be as high as 15000. This high species diversity has been attributed to the antiquity of the family, relatively low vagility leading to isolation, and evolutionary plasticity. In many aquatic ecosystems the number of chironomid species present may account for at least 50% of the total macroinvertebrate species recorded. This species richness, wide distribution and tolerance to adverse conditions has meant that the group is frequently recorded in ecological studies but taxonomic difficulties have in the past prevented non-specialist identification beyond family or subfamily level. Recent works, including genetic studies, have meant that the family is receiving much more attention globally.
Author : Mount Desert Island Biological Laboratory
Publisher :
Page : 198 pages
File Size : 26,22 MB
Release : 2009
Category : Biology
ISBN :
Author :
Publisher :
Page : 882 pages
File Size : 34,52 MB
Release : 1993
Category : Environmental health
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Author :
Publisher :
Page : 828 pages
File Size : 22,9 MB
Release : 1999
Category : Agriculture
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Author :
Publisher :
Page : 220 pages
File Size : 24,5 MB
Release : 2000
Category : Bioaccumulation
ISBN :
Author : Paul R. Adamus
Publisher :
Page : 224 pages
File Size : 33,2 MB
Release : 1996
Category : Biodiversity conservation
ISBN :
Author :
Publisher :
Page : 126 pages
File Size : 46,58 MB
Release : 2002
Category : Benthos
ISBN :
Author : United States. Environmental Protection Agency. Sediment Oversight Technical Committee
Publisher :
Page : 234 pages
File Size : 38,43 MB
Release : 1992
Category : Environmental protection
ISBN :
This document is a compendium of scientifically valid and accepted methods that can be used to assess sediment quality and predict ecological impacts...the intent here is to provide the most useful overall measures or predictors of ecological impacts currently in use rather than procedures that may have limited application outside of a particular regulatory framework... parag The information provided in the compendium on the relative strengths and weaknesses of the different assessment methods can provide assistance in selecting the appropriate methods.
Author : Deborah V Chapman
Publisher : CRC Press
Page : 658 pages
File Size : 39,63 MB
Release : 1996-08-22
Category : Science
ISBN : 0419215905
This guidebook, now thoroughly updated and revised in its second edition, gives comprehensive advice on the designing and setting up of monitoring programmes for the purpose of providing valid data for water quality assessments in all types of freshwater bodies. It is clearly and concisely written in order to provide the essential information for all agencies and individuals responsible for the water quality.