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Study on Spatial Connection and Fractal Characteristics of Prop Roots of Natural Rhizophora Stylosa

  • Received Date: 2012-11-05
  • Four types of community (Rhizophora stylosa pure forest, R. stylosa+Bruguiera gymnorrhiza mixed forest, R. stylosa+Avicennia marina mixed forest, and R. stylosa+B. gymnorrhiza+A. marina mixed forest) in Techengdao Mangrove Nature Reserve, Zhanjiang of Guangdong Province, were used to analyze the spatial connection and distribution pattern of R. stylosa prop roots by nearest neighbor index and connectivity index. The fractal characteristics of prop roots and the correlation coefficients among fractal dimension, rooting characteristics and topological index were discussed by means of fractal dimension and topological indices. The results are as follows. The spatial connection among the same grade R. stylosa prop roots in different community types is not strong, and the same grade R. stylosa prop roots follows a randomized distribution pattern. The R. stylosa prop root in different communities has good fractal characteristics, the fractal dimension is between 1.468 5-1.554 5, revealing strong ability to occupy and utilize the ecological space of R. stylosa roots. The topological structure of R. stylosaa roots is complicated, the topological index is between 0.366 4-0.448 5, and the root branching is dichotomous-shaped, which is beneficial to the root volume of space explored. There is a significant correlation between the fractal dimension and topological parameters, and it also shows a significant relationship between fractal abundance and total root number and average link length respectively.
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Study on Spatial Connection and Fractal Characteristics of Prop Roots of Natural Rhizophora Stylosa

  • 1. Faculty of Agricultural Science, Guangdong Ocean University, Zhanjiang 524088, Guangdong, China

Abstract: Four types of community (Rhizophora stylosa pure forest, R. stylosa+Bruguiera gymnorrhiza mixed forest, R. stylosa+Avicennia marina mixed forest, and R. stylosa+B. gymnorrhiza+A. marina mixed forest) in Techengdao Mangrove Nature Reserve, Zhanjiang of Guangdong Province, were used to analyze the spatial connection and distribution pattern of R. stylosa prop roots by nearest neighbor index and connectivity index. The fractal characteristics of prop roots and the correlation coefficients among fractal dimension, rooting characteristics and topological index were discussed by means of fractal dimension and topological indices. The results are as follows. The spatial connection among the same grade R. stylosa prop roots in different community types is not strong, and the same grade R. stylosa prop roots follows a randomized distribution pattern. The R. stylosa prop root in different communities has good fractal characteristics, the fractal dimension is between 1.468 5-1.554 5, revealing strong ability to occupy and utilize the ecological space of R. stylosa roots. The topological structure of R. stylosaa roots is complicated, the topological index is between 0.366 4-0.448 5, and the root branching is dichotomous-shaped, which is beneficial to the root volume of space explored. There is a significant correlation between the fractal dimension and topological parameters, and it also shows a significant relationship between fractal abundance and total root number and average link length respectively.

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