Monitoring The Dynamics Of Coastal Vegetation In Southwestern Taiwan |
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Authors: | Tsai-Ming Lee |
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Institution: | (1) Department of Natural Resources, Chinese Culture University, Yangming Shan, Taipei, Taiwan, Republic of China |
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Abstract: | This study analyzes the results of the first 5 years of long-term environmental monitoring of the dynamics of coastal vegetation
communities in southwestern Taiwan. Seven permanent plots were established in major vegetation communities, including grassland,
windbreak forest, and secondary succession forest. Results showed that species richness decreased yearly in grasslands but
fluctuated moderately in the forest plots. A Jaccard similarity coefficient was used to evaluate the similarities of species
composition between different monitoring years. Species composition changed rapidly in grassland sites, with the similarity
coefficient dropping from 82 to 29% in 5 years. The similarity coefficient of vegetation in the compositehardwood forest dropped
from 80 to 50%, indicating that at least half the species were the same as those in the beginning and that the composition
of forest communities was more stable than that of grassland communities. Dominant species in the forest community changed
gradually during the monitoring period. The original planting of Casuarina equisetifolia in windbreak forests decreased year by year in most of the plots, while Cerbera manghas and Ficus microcarpa became the dominant species. The trend of replacement of dominant species indicates that most of the vegetation communities
are still in successional stages. |
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Keywords: | dominant species environmental monitoring secondary succession vegetation long-term dynamics |
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