Das Nischenkonzept und seine Bedeutung für die Erklärung regionaler Verbreitungsmuster am Beispiel dreier Glossosomatidenarten (Trichoptera, Insecta)
Loading...
Files
Date
Authors
Publisher
Philipps-Universität Marburg
Abstract
The role of Hutchinson?s (1957) niche concept in
explaining regional patterns of distribution is analysed using
the example of three closely related glossosomatid species
(Insecta, Trichoptera, Glossosomatidae). The study focuses on
the species Agapetus fuscipes CURTIS, 1834, Synagapetus
iridipennis MCLACHLAN, 1879 and Synagapetus moselyi (ULMER,
1938). The first part of the thesis describes the species?
regional distribution throughout the study area situated in the
north-western part of Hesse, Germany. In total 67 spring brooks
are characterised taking into account a multitude of abiotic
parameters. The relationship between colonisation events and
the quality of these parameters is analysed. The ecological
requirements of the species are described based on correlation
analyses and multivariate statistics. The second part of the
study focuses on the small-scale description of colonised
microhabitats. For this purpose, a characteristic watercourse
was chosen for each species. A description of habitat
preferences is given for every aquatic stage of development and
used for further characterisation of the species. Finally, the
third part concentrates on the organism itself. The importance
of the parameters flow velocity, water temperature, drought
during pupal or embryonic stage, food intake and competition is
analysed in field as well as laboratory experiments. The
results of these three research parts are aggregated to a
synoptic description of the ecological niche of each species.
The characterisation of the three species obtained that way is
suitable to explain their regional distribution.
Review
Metadata
License
This item has been published with the following license: In Copyright