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

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Dictyogenus alpinum (Plecoptera) im Schreierbach, einem spezialisierten Biotop im Sinne THIENEMANNS Dictyogenus alpinum (Plecoptera) in the Schreierbach, a specialized biotope in the sense of THIENEMANN

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. (1982). Dictyogenus alpinum (Plecoptera) im Schreierbach, einem spezialisierten Biotop im Sinne THIENEMANNS Dictyogenus alpinum (Plecoptera) in the Schreierbach, a specialized biotope in the sense of THIENEMANN. Archiv für Hydrobiologie, 95(1/4), 533-548.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-CB99-F
Abstract
Schreierbach, a torrential mountain stream near Lunz, lower Austria, has a constant temp. of 6°C, which makes it a special biotope. As suggested by the 2nd biocoenotic principle of Thienemann (1920), its fauna is less diverse than that of other streams in the region. Emerging merolimnic insects are practically the only faunal component, and Dictyogenus alpinum is the most important contributor to total biomass. Its ecology was poorly known. Small larvae of Dictyogenus feed predominantly on Aufwuchs and detritus. The essentially carnivorous larger larvae also do so to some extent, at least at times. Adults do not feed, eggs are produced from biomass accumulated during the larval stage. Conditions in Schreierbach prolong egg incubation and slow larval growth thereby extending the normal 2-year cycle of D. alpinum to a 3-year period. Need of eggs to experience a number of degree days sufficient for development during the warm season is suggested as a factor controlling the spring to early summer flight periods common to all semivoltine Plecoptera of northern temperate latitudes.