Titlebook: Succession in Abandoned Fields; Studies in Central B Jana Osbornová,Marcela Ková?ová,Karel Prach Book 1990 Kluwer Academic Publishers 1990

信徒

Introduction,losely related to the general trends in ecology. These trends were thoroughly reviewed recently (O’Neil et al. 1986, Austin 1986, Noy Meir and van der Maarel 1987, Keddy 1987, Tilman 1988). It was clearly shown that (1) ecosystems should be considered as complex hierarchical systems, (2) each hierar

捏造

General characteristics of the region,wer Palaeozoic (Silurian and Devonian) sedimentation basin known worldwide in geological literature under the name Barrandien (after a French paleontologist Joachim Barrande who studied this region from 1830–1870). Not only from the geological point of view, but also for its remarkable landscape, fl

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慎重

Dynamics of populations and communities,basic successional seres, i.e., xeric and mesic, viewed through differences in vegetation. However, it is necessary to bear in mind that there are continuous transitions between those seres which were only sporadically analysed in detail; other fields also existed that were drier and wetter than tho

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Reaction to perturbations,ommunity stability. It may be shown . that some structural features are correlated with aspects of stability, but so far, we have no theoretical reason to consider any structural feature to be an . sign of stability (see e.g. Goodman 1975). Similarly, the perturbation experiments seem to be the best

加花粗鄙人

Synthesis,e relation to investigations of succession itself, stability, productivity, and nutrient balance of ecosystems were often studied. Thus, we can try to compare our conclusions with former and newly emerged theories focusing on common trends in succession.

傾聽

Summary,ca. fifty years of succession in both studied seres. Some conclusions are simplified, since they were often inferred from a simple comparison of young (X1, X2, and M1, M2) and old (X3 and M3) fields. Many characteristics have not changed unidirectionally during the whole period under consideration.

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GULLY

Reaction to perturbations, way (if not the only one) to recognize the functional relationships within the community. In order to evaluate the stability and to get better insight into functional relationships within the community, we conducted a set of perturbation experiments.

LUT

Dynamics of populations and communities,tinuous transitions between those seres which were only sporadically analysed in detail; other fields also existed that were drier and wetter than those selected for intensive study in the xeric and mesic seres, respectively. This must be considered in all other interpretations and generalizations.