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Author: P.D. Armitage
Publisher: Springer Science & Business Media
ISBN: 9401107157
Category : Science
Languages : en
Pages : 579
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Book Description
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: P.D. Armitage
Publisher: Springer Science & Business Media
ISBN: 9401107157
Category : Science
Languages : en
Pages : 579
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Book Description
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: John Russell Malloch
Publisher:
ISBN:
Category : Chironomidae
Languages : en
Pages : 334
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Book Description
Author:
Publisher:
ISBN:
Category : Chironomidae
Languages : en
Pages : 56
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Book Description
Author: Bryan Robert Davies
Publisher:
ISBN:
Category : Chironomidae
Languages : en
Pages : 108
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Book Description
Author: National museum of Ireland (Dublin).
Publisher: Anchor Books
ISBN: 9780955080654
Category : Diptera
Languages : en
Pages : 968
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Book Description
Author: Farzana Khan Perveen
Publisher: BoD – Books on Demand
ISBN: 1839688823
Category : Science
Languages : en
Pages : 190
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Book Description
This book provides comprehensive and concise knowledge about Diptera, an order of insects that has both useful and harmful aspects for humans, animals, plants, and the environment. Insects of this order act as agricultural pests as well as vectors of diseases and carriers of microorganisms. Chapters cover such topics as characteristics of different types of Dipteran insects including fruit flies, mosquitos, and midges, and strategies to control insect populations to combat the spread of human and animal diseases such as dengue, trypanosomosis, and others.
Author:
Publisher:
ISBN:
Category : Hydrology
Languages : en
Pages : 390
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Book Description
Author: Henk K.M. Moller Pillot
Publisher: Hotei Publishing
ISBN: 9004278052
Category : Science
Languages : en
Pages : 314
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Book Description
Chironomidae Larvae of the Netherlands and Adjacent Lowlands Chironomids are a group of non-biting midges, the larvae of which are important in aquatic ecosystems. The subfamily Orthocladiinae is well represented in flowing water. This books contains information about their life cycle, feeding behaviour and their response to environmental factors. Chironomidae Larvae, Vol. 3: Orthocladiinae presents a wealth of information for scientific and practical purpose. The subfamily Orthocladiinae is especially well represented in flowing water. Most of the species need a good supply of oxygen and few larvae are bottom dwellers. Many species emerge early in spring and may be scarce in summer. Other species live in stagnant and even temporary water bodies. • information about the life cycle and feeding behaviour of the larvae and their response to environmental factors such as oxygen conditions, current velocity and saprobity • special attention to the interrelations between these factors • general and specific aspects of the systematics, biology and ecology the genera and species • nomenclature and identification An invaluable tool for aquatic ecologists and water quality management. Volume 1: Chironomidae Larvae - General ecology and Tanypodinae Volume 2: Chironomidae Larvae - Biology and ecology of the Chironomini Volume 3: Chironomidae Larvae - Biology and Ecology of the Aquatic Orthocladiinae
Author: Richard W. Merritt
Publisher: Kendall Hunt
ISBN: 9780787232412
Category : Nature
Languages : en
Pages : 894
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Book Description
Author: Ronald S. Wilson
Publisher:
ISBN: 9780900386732
Category : Chironomidae
Languages : en
Pages : 176
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Book Description
About 600 species of non-biting or "dancing" midges occur in Britain and Ireland, with many more on the continent of Europe. They are most noticeable when the adults perform mating flights in swarms along the shores of runningwater (lentic) and standing or still-water (lotic) habitats. The aquatic life-cycle of eggs, larvae and pupae usually lasts for a year or less. When adult midges emerge from their pupae the empty cast skins or pupal exuviae float on the water-surface and become part of the flotsam accumulating along strand-lines and in backwaters. In such places, pupal exuviae can be scooped-up easily with a long-handled pondnet, for subsequent identification under low magnification. This guide provides a series of multiple-choice keys for identifying the pupal exuviae of 145 genera and more than 100 selected species of Chironomidae that have been recorded from Britain and Ireland, including some that may become added to the list as they colonise the region from Northern Europe. The guide provides a simplified introduction to the complex taxonomy of the Family Chironomidae, and is intended for use by those who are not familiar with the group. The text is generously illustrated with line-drawings of important characters used for identification. An illustrated key is also given to separate the pupal exuviae of chironomids from the cast skins of other common aquatic insects that are similar in general appearance. All genera and species covered by the guide are allocated to one of four groups representing varying degrees of organic pollution, based on published knowledge of the ecological requirements of genera and individual species, and the authors' own extensive experience. Drs Wilson and Ruse use their Chironomid Pupal Exuvial Technique (CPET) to evaluate habitat diversity and the ecological quality of a wide variety of water-bodies, and to monitor any changes occurring in them. Their technique is comparable to others that are commonly employed in biological monitoring and assessment of water quality. CPET is summarised and briefly discussed in a special section of the text.
