Woody expansion facilitates liana expansion and affects physical structure in temperate coastal communities
Woody expansion facilitates liana expansion and affects physical structure in temperate coastal communities
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木质扩张促进藤本植物扩张并影响温带沿海群落的物理结构
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发表时间：
2016
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通讯作者：
D. Young
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作者：
Spencer N. Bissett;J. Zinnert;D. Young
一般而言，沿海生态系统，特别是屏障岛屿，为在空间和时间压缩的环境中观察生态模式和过程提供了独特的机会。严酷的非生物条件和频繁的干扰限制了常驻物种的数量，高度动态的地貌可能会导致一个空间为时间的替代年轻的海滨社区让位给更发达的后期演替的内部社区。我们调查了藤本植物和木本植物之间的关系，在弗吉尼亚州（猪岛）和北卡罗来纳州（鸭FRF）的屏障岛网站，评估是否藤本植物的增殖加速或延迟继承的优势木本社区，莫雷拉灌木丛，历史的高潮社区，海洋森林。利用航空影像，激光雷达数据，社区调查，土壤采样，我们发现了非生物环境变量和木本群落结构之间的相关关系，以及木本群落分布和藤本植物的成功。环境变量表现出很小的预测能力藤本植物的分布，但有证据表明，藤本植物和突出的木本物种在猪岛之间的关联，虽然斑块的社会和非生物的同质性阻止这些协会建立在鸭联邦储备委员会。我们认为，木本植物扩张的趋势，目前和预测的全球变化对藤本植物的生长和成功的影响，可能有助于延迟或防止进一步的演替发展，在这些和其他温带沿海地区。
Coastal ecosystems in general, and barrier islands in particular, offer unique opportunities to observe ecological patterns and processes in spatially and temporally compressed settings. Harsh abiotic conditions and frequent disturbances limit the number of resident species, and highly dynamic geomorphology may result in a space-for-time substitution as young shoreward communities give way to more developed later-successional interior communities. We investigated relationships between lianas and woody plants at barrier island sites in Virginia (Hog Island) and North Carolina (Duck FRF), to evaluate whether liana proliferation accelerates or delays succession from the dominant woody community, Morella shrub thicket, to the historic climax community, maritime forest. Using aerial imagery, Lidar data, community surveys, and edaphic sampling, we found a correlative relationship between abiotic environmental variables and woody community structure, and also between woody community distribution and liana success. Environmental variables demonstrated little predictive ability for liana distribution, but there was evidence of an association between lianas and the prominent woody species at Hog Island, though patchiness of the community and abiotic homogeneity prevented these associations from establishing at Duck FRF. We suggest that trends of woody plant expansion, compounded with current and predicted global change effects on growth and success of lianas, may contribute to a delay or prevention of further successional development at these and other temperate coastal sites.