Changes and interactions in the pelagic community in acidified lakes in Sweden

The pelagial communities of lakes undergo dramatic changes during the course of acidification and all major groups of organisms; algae, rotifers and crustaceans showing a reduction in number of species. Calanoid copepods, Eudiaptomus gracilis in particular, increase in relative importance, cladocera...

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Bibliographic Details
Published in:Ambio 1993-08, Vol.22 (5), p.277-282
Main Authors: Stenson, J.A.E, Svensson, J.E. (Goeteborg Univ. (Sweden). Zoologiska Inst.), Cronberg, G
Format: Article
Language:English
Subjects:
ACIDIFICACION
ACIDIFICATION
Aluminum
AMBIENTE PELAGICO
AQUATIC ORGANISMS
Crustaceans
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
ENVIRONMENTAL IMPACT
Exact sciences and technology
Freshwater
Freshwater fishes
IMPACT SUR L'ENVIRONNEMENT
IMPACTO AMBIENTAL
Invertebrates
LAC
LAGOS
LAKES
Lentic systems
Liming
MILIEU PELAGIQUE
ORGANISME AQUATIQUE
ORGANISMOS ACUATICOS
PELAGIC ENVIRONMENT
Phosphorus
POLLUTION DE L'EAU
Pollution, environment geology
POLUCION DEL AGUA
SUECIA
SUEDE
SWEDEN
WATER POLLUTION
Zooplankton
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Summary:The pelagial communities of lakes undergo dramatic changes during the course of acidification and all major groups of organisms; algae, rotifers and crustaceans showing a reduction in number of species. Calanoid copepods, Eudiaptomus gracilis in particular, increase in relative importance, cladocerans become less important, and daphnids are lost. The decrease in diversity in the plankton community is more apparent in clear-water lakes than in humic lakes. Invertebrate zooplanktivores, especially, increase in importance after the loss of fish species. The increase in concentration of hydrogen ion and metals have had a direct impact on reproduction and survival of both algae and invertebrates. Indirect effects contributing to reduced diversity are altered species structure via predatory and competitive changes, and impact on pathways and rates for nutrient cycling.
ISSN:0044-7447
1654-7209