气候、景观和人为干扰对岛屿竹类植物物种丰富度分布格局的影响

[Objective]Investigating the distribution patterns and underlying mechanisms of bamboo species richness on islands not only enhances our understanding of island ecosystem dynamics but also provides essential scientific guidance for the conservation and management of bamboo resources.[Method]This study analyzed the species-area relationship of bamboo species on 30 islands in Fujian and examined the effects of 13 environmental factors across three major categories:landscape,human disturbance,and climate.[Result]The results showed that bamboo species on Fujian islands generally followed a species-area relationship where species richness increased with island size.The species-area relationship slope(z)for total species richness was 1.69,for monopodial species 0.24,for sympodiall species 1.43,and for polycyclic species 0.02.Landscape factors,particularly island area,were the most important determinants of bamboo species richness across different reproductive types.Total species richness increased with island size but decreased as the proportion of buildings and farmland(BFA)increased.Additionally,different reproductive types showed varying responses to environmental factors.In particular,the perimeter-area ratio also played a significant role in explaining the richness of sympodial species.[Conclusion]Compared to other island ecosystems,bamboo species richness and its reproductive types on Fujian islands were more dependent on island size,with landscape factors having a higher explanatory power,while the effects of climate change and human disturbance were relatively minor.These findings provide valuable scientific support for the future conservation of bamboo diversity and ecological management on islands,helping to develop more effective biodiversity conservation strategies and sustainable utilization plans for island plant resources.