Body weight distributions of European Hymenoptera

Article Abstract:

The body size distributions of a large part of the European Hymenopteran fauna contained in a database comprising more than 150000 species are examined. It is shown that their weight distributions do not exhibit a general trend towards right skewed species-body weight distributions, which emphasizes the importance of ecological factors like guild membership and life history for a proper interpretation of body size distributions and phylogenetical constraints.

Economic aspects, Physiological aspects, Phylogeny, Body weight, Animal ecology, Hymenoptera

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Abundance and co-occurrence patterns of core and satellite species of ground beetles on small lake islands

Article Abstract:

Community structures and patterns of co-occurrences of ground beetle were investigated at 15 lake islands and two mainland sites of Mamry lake in Poland. Results suggest that the regional distribution of core species might be shaped by species interactions and processes of niche divisions whereas the spatial distribution of satellite species are best interpreted as stemming from random dispersal.

Goods & services distribution, Channels of Distribution, Environmental aspects, Distribution, Animal populations, Beetles, Company distribution practices

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Species co-occurrences and neutral models: Reassessing J. M. Diamond's assembly rules

Article Abstract:

A meta-analysis showed that neutral ecological drift models are able to generate patterns in line with the Diamond's assembly rules. Results show that ecological drift is able to generate non-random species co-occurrence patterns similar to ones found in natural assemblages.

Species, Species (Biology), Meta-analysis

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