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- W199492719 abstract "In spite of the high approval and the reference in many forest law and forestry service regulations, the idea of autochthony still seems to lack the definiteness and operationality that at least enables unambiguous specification of its ecological and evolutionary significance. This makes the assessment of autochthony questionable. Explication of the expectations connected with the idea reveals that, when applied to populations, it primarily addresses their adaptedness to the environmental conditions of a special site in combination with the adaptability that can be preserved at this site. Necessary prerequisites for realizing high degrees of adaptedness and adaptability are provided by regular environmental conditions together with balanced gene inflow from genetically heterogeneous and differentiated neighboring conspecific populations. Since successful adaptational processes reduce adaptational stress levels, adaptedness increases the capacity to support the genetic loads that are required for preserving adaptability to temporary as well as to lasting changes. Herewith, adaptability to temporary and lasting changes depends primarily on resident and immigrant genetic information, respectively. The latter requires metapopulation structures with balanced gene flow systems. Because of the complexity of this situation, a comprehensive assessment of autochthony is impossible. However, much of this complexity can be avoided by concentrating on the historical, geographical and genealogical characteristics of populations as separate units of adaptation. It is argued and illustrated by an example, that such an approach to the assessment of autochthony can be realized with the help of phylogeographic methods by testing the hypothesis of positive correspondence between phylogenetic relatedness and spatial distance." @default.
- W199492719 created "2016-06-24" @default.
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- W199492719 date "2001-01-01" @default.
- W199492719 modified "2023-09-26" @default.
- W199492719 title "Is autochthony an operational concept?" @default.
- W199492719 cites W2041076979 @default.
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- W199492719 doi "https://doi.org/10.1007/978-94-015-9839-2_15" @default.
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