Nom du corpus

Corpus Systématique Animale

Titre du document

The emergence of insects from a British River warmed by power station cooling-water

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Insectes_v2b_00306
Auteur(s)
  • T. E. Langford 1
  • J. R. Daffern
Affiliation(s)
  • 1) Central Electricity Research Laboratories, Freshwater Biology Unit, c/o Scientific Services Centre, NG11 OEE, Ratcliffe-on-Soar, Nottingham
Résumé

During a programme of research on the fauna of the River Severn around Ironbridge Power Station, the emergence patterns of resident insect species were studied upstream and downstream of the cooling-water outfalls. This paper describes the traps used to catch emerging adult insects and relates their overall performance, total catches and species selectivity, to the physical characteristics of the river. Upstream temperatures during 1970 and 1971 reached maxima of 22°C and 20.6°C respectively, while downstream maxima were 27.8°C and 23.4°C. The main cause of elevated temperatures downstream was cooling-water from Ironbridge “A” Power Station. Analysis of trap catches showed that the total numbers of Ephemoptera species and of individuals were greater in certain types of trap but that catches of Trichoptera were less related to trap type. The total emergence period varied during 1969, 1970 and 1971 irrespective of the elevated temperatures and both Ephemeroptera and Trichoptera continued to emerge during and after water temperatures as high as 26–27.8°C and as low as 11°C, in June. There was some relationship between emergence rates, river level (flow) and temperatures, but evidence suggests that river level was the most significant factor. The general conclusion from this paper is that the temperature increases in the Severn, caused by normal operations at Ironbridge “A” and by sporadic operations at Ironbridge “B”, did not have a significant effect on the total numbers and overall emergence period of Trichoptera, Ephemeroptera and Megaloptera downstream of the outfalls. Also the species-composition of trap catches was very similar both upstream and downstream of the power stations. The emergence periods of individual species are described in a second paper.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - microbiologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
Identifiant ISTEX
79872C178B89725BC20E9CF097C9EE9A0003A47F
Revue

Hydrobiologia

Année de publication
1975
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
10
Sous-corpus
  • Insectes
Type de publication
Journal
ark:/67375/1BB-9BZWFTHT-J
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