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Does genome size explain rarity in beetles? The case from Coccinelidae and Chrysomelidae families

Zalewski M., Ciurzycki W.

Polish Journal of Ecology

2010

Vol. 58, nr 3

585-591

Accumulation of selfish DNA in cells has fundamental consequences for organism metabolism. Detrimental effects of large genome size have been demonstrated for several aspects of performance in plant and animal species. Here we check if a large genome affects occupancy among Coccinelidae and Chrysomelidae occurring in Poland. It was possible to match literature data on distribution and genome-size data for 19 species of chrysomelids and 10 species of coccinelids of different rarity (occurrence expressed as % of Poland area) and body size. There was a marginally significant (P = 0.04) and expected excess of species with large genomes among rare species (<0.73% of area), as well as an excess of species with small genomes among common species (>0.89% of area) However overall correlation was not significant (P = 0.13). Body size was not related to rarity in these species. The detection of this weak signal provides a clue to the important idea that large-scale patterns may stem from differences observed at the cellular level.

Pine ecosystem response to warming along North-South climatic transect in Europe : presentation of research project

Breymeyer A.

Polish Journal of Ecology

2003

Vol. 51, nr 4

403-411

An attempt was made to evaluate the response of the ecosystem to changes of climate in ten pine forest stands. It was assumed that the ecosystem response to environmental change can be evalued by examining differences in ecosystem structures and would be measured through the change in the rates of ecosystem processes. The changes of structures and rates are registered along the longest, N-S transect available on the European Continent above 50 stopni N. This transect in within the belt crossing Northern Scandinavia (Norvay and Finland up to 70 stopni N), the Baltic States (Estonia, Latvia, Lithuania) and Eastern Poland (from 50 stopni N). The transect covers 20 degrees oflatitude and is more than 2000 km long. The difference in average annual temperature (long-term measurements) between the two extreme sites exceeds 9 stopni C, and there is a regular soutward increase of average site temperature. Precipitation does not show any regular pattern of change along the transect. Average site elevation is 86 m a.s.l., and the average forest age 110 years. All sites are dominated by an overstory of Scots pine, and in the Braun-Blanquet classification they all belong to Vaccinio-Piceetea class of forests, which are common in Europe. During four years of study (1997, 1998, 1999 and 2000) four expeditions to the transect were organized. The Following studies were conducted on each site: the origin and structure as well as physical and chemical features of soils; tree stand age, height, basal area, biomass and carbon content; vertical and horizontal structure of ground vegetation, its diversity, biomass and carbon; litter fall, its decomposition and accumulation; and radial growth of trees.