de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Stability and changes of biomass of emerging insects and their possible causes

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons57026

Zwick,  Peter
Limnological River Station Schlitz, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Zwick, P. (1984). Stability and changes of biomass of emerging insects and their possible causes. Verhandlungen der Inrternationalen Vereinigung für Limnologie, 22(3), 2037-2041.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-CB2A-B
Abstract
In Breitenbach, Federal Republic of Germany there is a downstream increase of daily as well as annual temperature amplitudes on the 2 km stretch between a large spring entering the stream and its mouth into the Fulda River. The importance of this thermal gradient for longitudinal zonation of Ephemeroptera , Plecoptera and Trichoptera is reevaluated. Less species than previously suggested are actually affected. A regular upstream increase of abundance is observed only in 3 species, but these include 2 of the most important secondary producers of the stream community, which is dominated by oligo-stenothermal species. More species exhibit a downstream increase of abundance , but none of these more polyeurythermal ones is among the numerically important species in the stream. Distribution and abundance of most species in the stream are irregular and apparently determined by other factors such as substrate composition at the stream bottom. (Baker-IVI)