TY  - JOUR
A1  - Weithoff, Guntram
A1  - Walz, Norbert
A1  - Gaedke, Ursula
T1  - The intermediate disturbance hypothesis : species diversity or functional diversity
N2  - Phytoplankton dynamics in a shallow eutrophic lake were investigated over a 3-year period with respect to environmental forces which drive species composition and diversity. Diversity was calculated on the basis of species as well as on the basis of their functional properties (the C-R-S-concept). Stratification and water column mixing had a strong impact on phytoplankton composition. Application of a similarity-diversity model revealed that a high diversity was a transient non-stable state, whereas drastic changes or long-lasting stable environmental conditions are characterized by low diversity. This effect was more pronounced when the diversity was calculated on the basis of the phytoplankton species functional properties. Thus, this functional approach supports the intermediate disturbance hypothesis from field data.
Y1  - 2001
ER  - 
TY  - JOUR
A1  - Hairston, Nelson G.
A1  - Holtmeier, C. L.
A1  - Lampert, W.
A1  - Weider, L. J.
A1  - Post, D. M.
A1  - Fischer, J. M.
A1  - Caceres, C. E.
A1  - Fox, J. A.
A1  - Gaedke, Ursula
T1  - Natural selection for grazer resistance to toxic cyanobacteria: Evolution of phenotypic plasticity?
Y1  - 2001
ER  -