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Global woodland structure from local interactions:new nearest-neighbour functions for understanding the ontogenesis of global forest structure

引用

Forest Ecosystems 2020年第2期7卷 290-300页

作者： Arne Pommerening Hongxiang Wang Zhonghua Zhao Faculty of Forest Sciences Department of Forest Ecology and ManagementSwedish University of Agricultural Sciences SLUSkogsmarksgränd 17SE-90183 UmeåSweden College of Forestry Guangxi UniversityNanning 530004China Key Laboratory of Tree Breeding and Cultivation of National Forestry and Grassland Administration Research Institute of ForestryChinese Academy of ForestryBox 1958Beijing 100091China.

Background:A number of hypotheses and theories,such as the Janzen-Connell hypothesis,have been proposed to explain the natural maintenance of biodiversity in tropical and temperate forest ***,to date the details of the processes behind this natural maintenance are still *** two new nearest-neighbour characteristics were proposed and in this paper we demonstrate how they can contribute to a better understanding of the ontogenesis of global forest structure from localised ***:We applied the new species and size segregation functions together with appropriate test procedures to four example woodland data sets from China at Daqingshan,Jiaohe,Jiulongshan and Xiaolongshan forest *** addition we quantified the morphology of the new characteristics and modelled a neighbourhood allometric coefficient linking the two ***:The results revealed quite different species segregation patterns with both conspecific and heterospecific *** found these to be generally matched by equivalent size segregation patterns of attraction of similar and different *** was straightforward to model the size segregation function from the knowledge of the species segregation function by estimating a neighbourhood allometric ***:The new characteristics have helped to quantify the extent and rate of decline of neighbourhood interactions in terms of spatial species and size *** the allometric neighbourhood coefficient the analysis highlighted once more how closely related species and size segregation are,thus supporting the minglingsize *** both a traditional and a restricted random-labelling test has provided a valuable tool for understanding the exact nature of species-mingling and size-inequality relationships.

关键词： Species segregation function Size segregation function Mingling-size hypothesis neighbourhood allometric coefficient random labelling

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