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| Ecological Niche Characteristics of Dominant Species of Forest Communities in the Coastal Zone of Dapeng Peninsula, Shenzhen |
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| DOI：10.16768/j.issn.1004-874X.2023.03.006 |
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| Abstract: |
| 【Objective】By investigating the ecological niche characteristics of the dominant species of the forest communities in the coastal zone of Dapeng Peninsula, Shenzhen, the ability and similarity of the species to use environmental resources are understood, providing a scientific basis for forest management in this area. 【Method】On the basis of the field survey, by using the calculation methods of Levins niche breadth, Shannon-Wiener niche breadth, Pianka niche overlap and niche similarity, dominant species from tree layer and shrub layer in the Egong Village sample site and Luowutian Reservoir sample site in the coastal zone were selected for niche quantitative research.【Result】In the communities of the Egong Village sample site and the Luowutian Reservoir sample site, (1) the species with the larger niche breadth in the tree layer were Litsea rotundifolia var. oblongifolia and Aporosa dioica, with Levins indices of 16.40 and 22.70, and Shannon-Wiener indices of 2.89 and 3.16, respectively; the species with the larger niche breadth in the shrub layer were Diplospora dubia and Syzygium rehderianum, with Levins indices of 19.10 and 23.97 and Shannon indices of 3.07 and 3.20, respectively. (2) The overall mean values of niche overlap in the tree layer were 0.434 and 0.641, respectively, and the species with the larger niche overlap were Ilex pubescens and Rhodomyrtus tomentosa (0.997), Psydrax dicocca and Garcinia oblongifolia (0.923); the overall mean values of niche overlap in the shrub layer were 0.441 and 0.468, respectively, and species with the larger niche overlap were Pavetta hongkongensis and Sterculia lanceolata (0.910), Aporosa dioica and Psychotria asiatica (0.959). (3) The tree species with larger niche similarity were Pavetta hongkongensis and Mallotus paniculatus (0.820), Psydrax dicocca and Garcinia oblongifolia (0.817), Rhaphiolepis indica and Diplospora dubia (0.751), Syzygium rehderianum and Psychotria asiatica (0.878).【Conclusion】In coastal zone forest communities, Litsea rotundifolia var. Oblongifolia, Diplospora duia, Syzygium rehderianum have larger ecological niche breadth. The community structure and species composition in the Egong Village sample site are in a relatively stable state, and most species in the Egong Village sample site have widely varying needs for environmental resources. Interspecific competition is more intense in the tree layer than that in the shrub layer in the Luowutian Reservoir sample site, the forest communities in this site are still in the successional stage as a whole, and the ecological niche differentiation has not yet been stabilized. |
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