Genetic diversity in relation to secondary succession of forest tree communities

• Autorzy: Wehenkel C. , Corral-Rivas J. , Hernandez-Diaz J.
• Języki publikacji: EN

Abstrakty

EN

Forest succession is a fundamental ecological process, which has significant implications for the biological, biophysical, and biogeochemical processes in an ecosystem. Genetic diversity is not only a product of the number of species present in a given area, but also of successional change from colonization of gaps by pioneer species to mature climax forest. Genetic diversity should be higher in earlier successional stages than in later stages because high environmental predictability in later successional stages favours low genetic diversity. In the present study the relationship between secondary succession and genetic diversity was explored in eight stands of characteristic tree communities in the Thuringian forest area (Germany). Each of the eight stands was subdivided into six plots in a grid of 40 x 40 m to detect as much as possible tree species and genetic variants within the forest tree community and successionspecific structures. To define secondary succession, the mean Ellenberg indicator values for light and nitrogen in the herb layer, weighted for coverage, as well as the percentage of climax tree species in naturally regenerated stands were used. All species and genotype diversities based on the investigated tree species were calculated by the so-called Hill numbers. The results showed that the Gregorius's Covariation (C) of secondary succession with the transspecific genotype diversity as well as the transspecific genotype diversity per species for the enzyme systems AAT, HEK, PGI, MDH, IDH as well as the AFLP trait was statistically significant in several relationships. The transspecific genotype diversities were often significantly greater in the earlier successional stages than in the later stages. Selection effects during replacement of light and nitrogen demanding species and plant communities by more economical and competitive species such as Abies alba Mill. and Fagus sylvatica L. probably dominated in the study. Based on the results of the study, we conclude that genetic diversity may be an essential attribute of stages of secondary succession that should be further explored because of its relation to adaptability and ecological stability.

Słowa kluczowe

EN

climax tree species; covariation; diversity; permutation test; secondary succession

PL

gatunki drzew; klimaks; kowariancja; różnorodność; testy permutacyjne

• Wydawca: Museum and Institute of Zoology, Polish Academy of Sciences
• Czasopismo: Polish Journal of Ecology
• Rocznik: 2011
• Tom: Vol. 59, nr 1
• Strony: 45--54
• Opis fizyczny: Bibliogr. 48 poz.,

Twórcy

autor

Wehenkel C.

autor

Corral-Rivas J.

autor

Hernandez-Diaz J.

• Instituto de Silvicultura e Industria de la Madera, Universidad Juarez del Estado de Durango, Km 5.5 Carretera Mazatlan, 34120 Durango, Mexico,

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