Abstract：Pescadores is considered one of the most difficult areas to establish coastal windbreaks in Taiwan area because of the critical weather condition. The main impact factors, including salty mist, typhoon, and human activities, result in the fragment of existing mature windbreaks. Twenty one sampling plots were established to examine the relationship between vegetation community structure and the disturbance of neighborhood. The improvement of forestation techniques and the ecological progress of windbreaks were also evaluated. Species richness of vegetation, the important value index of trees, and the cover-abundance of groundcovers were analyzed to evaluate the vegetation variation among stands. A total 39 families and 80 plant species were recorded. The main species of plantation was Casuarina equisetifolia and Leucaena leucocephala invaded into most plantations to form as a mixture forest. A quantified similarity coefficient, Motaya coefficient, was used to analyze the species composition among sampling plots. The results showed that the species composition in most windbreaks were quite different. The Motaya coefficients among the plots ranged from 0 to 87, which means the vegetation in some plots were totally different to others and in some plots near 90% of vegetation were the same. It is considered that species diversity of groundcovers among the plots was due to the variant landuse types of neighborhoods.
2005, Vol. 3 
