4 results match your criteria: "Faculty of Biology A. Mickiewicz University[Affiliation]"
Large body size constrains dispersal assembly of communities even across short distances.
Sci Rep
July 2018
Université de Rennes 1/CNRS; Ecosystèmes, Biodiversité, Evolution (ECOBIO); Campus de Beaulieu, 35042, Rennes, France.
Article Synopsis
- Dispersal limitation in animals is thought to decrease with body size, but this study suggests it may actually increase for large, flightless oribatid mites on young trees due to limited aerial dispersal abilities.
- By connecting branches of young trees to those of old trees, researchers suppressed dispersal limitation and found an increase in community evenness and larger mean body size of mites on young tree branches.
- The findings indicate that larger body sizes can negatively impact colonization and survival, suggesting that even in connected habitats, larger flightless invertebrates may struggle to disperse effectively.
The unified neutral theory of biodiversity and biogeography has gained the status of a quantitative null model for explaining patterns in ecological (meta)communities. The theory assumes that individuals of trophically similar species are functionally equivalent. We empirically evaluate the relative contribution of neutral and deterministic processes in shaping fruit-feeding butterfly assemblages in three tropical forests in Africa, using both direct (confronting the neutral model with species abundance data) and indirect approaches (testing the predictions of neutral theory using data other than species abundance distributions).
View Article and Find Full Text PDFShort RNAs derived from the cleavage of tRNA molecules are observed in most organisms. Their occurrence seems to be induced by stress conditions, but still little is known about their biogenesis and functions. We find that the recovery of tRNA fragments depends on the RNA isolation method.
View Article and Find Full Text PDFAeromonas spp.-mediated cell-contact cytotoxicity is associated with the presence of type III secretion system.
Antonie Van Leeuwenhoek
February 2012
Department of Microbiology, Faculty of Biology A. Mickiewicz University, 61-614 Poznań, ul. Umultowska 89, Poznan, Poland.
In the study we examined the production of cytotonic and cytotoxic toxins and the presence of a type III secretion system (TTSS) in 64 Aeromonas spp. strains isolated from fecal specimens of patients with gastroenteritis. We observed that contact of the bacteria with host epithelial cells is a prerequisite for their cytotoxicity at 3 h incubation.
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