Národní úložiště šedé literatury Nalezeno 3 záznamů.  Hledání trvalo 0.00 vteřin. 
Role of habitat complexity and predation in the structuring of aquatic communities
SOUKUP, Pavel
This thesis focuses on the roles habitat complexity and predation play in the structuring of aquatic communities. Chapter one provides an overview of the way habitat complexity structures communities separately, and by altering predator prey interactions in all aquatic habitats. The following two chapters examine their combined effects using different predator-prey pairs and time scopes: short-term laboratory experiments and a medium-term mesocosm experiment.
Vliv rizika predace a komplexity prostředí na trofické interakce ve vodním prostředí
KOLÁŘ, Vojtěch
The thesis results of two laboratory experiments focusing on the impacts of predation risk, prey density and habitat complexity on predator-prey interaction strengths and predator metabolic rates, complemented by a brief review of the subject. The experimental system used in the first experiment consisted of cladoceran prey, larvae of three dragonfly species (Sympetrum sanguineum, Libellula quadrimaculata, Ischnura cf. elegans) as intermediate predators, and larvae of a large dragonfly species (Aeshna sp.) as a top predator. The second experiment of investigated how predation risk influences metabolic rates of the intermediate predators.
Vliv komplexity prostředí a rizika predace na utváření společenstev v malých stojatých vodách
SOUKUP, Pavel
The effects of habitat complexity and predation risk on community assembly in small standing waters are reviewed. Both lethal and nonlethal predator effects are discussed. Emphasis is put on the role of omnivorous predators which do not fit into the standard food chain model. The review is complemented by a manuscript intended for publication in Freshwater Biology. It reports the results of a mesocosm experiment focusing on the effects of both lethal and nonlethal predation risk, induced by the invasive crayfish species Orconectes limosus, and habitat complexity on the abundance and biomass of macroinvertebrates in a naturally assembled community.

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