ASSOCIATION BETWEEN FERAL PIG DISTURBANCE AND THE COMPOSITION OF SOME ALIEN PLANT ASSEMBLAGES IN HAWAII-VOLCANOS-NATIONAL-PARK
ASSOCIATION BETWEEN FERAL PIG DISTURBANCE AND THE COMPOSITION OF SOME ALIEN PLANT ASSEMBLAGES IN HAWAII-VOLCANOS-NATIONAL-PARK
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DOI：
10.1007/bf00124953
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发表时间：
1991-08-01
期刊：
影响因子：
--
通讯作者：
STONE, CP
中科院分区：
文献类型：
--
作者：
APLET, GH;ANDERSON, SJ;STONE, CP
应用关联度分析方法对美国夏威夷火山国家公园25种重要外来植物之间的关系及其与野猪生根的关联性进行了分析，并对关联度分析的结果进行了简单的排序，得到3个主观的物种组合。其中一个类群的特征是与终点物种Ehrharta stipodes有关联。第二组由与另一个终点物种--维吉尼亚雄鼠相关的物种组成。第三组由14种不同物种组成，排列顺序与每个物种与猪引起的土壤干扰的关联度进行比较，结果表明，Ehrharta组的成员与猪的活动密切相关，而andropogon组的成员一般与猪的活动呈负相关。第三类与猪引起的土壤干扰没有关联。这些结果表明，野猪的活动与植物群落中外来部分的组成有很强的关系。对植物和猪的生态环境的分析表明，一些物种可能既鼓励猪的活动，又从中受益。同样，其他外来植物似乎既不需要也不受益于猪引起的土壤干扰。虽然猪似乎在这些社区的组织中发挥了重要作用，但它们的清除可能对该地区许多常见杂草的成功影响微乎其微。
Association analysis was used to assess relationships among 25 important alien plant species and their association with feral pig rooting in Hawaii Volcanoes National Park, Hawaii, U.S.A. Results of the association analysis were summarized by means of a simplified, rank-based, polar ordination which yielded three subjective species assemblages. One group was characterized by an association with the endpoint species, Ehrharta stipoides. A second group consisted of species associated with the other endpoint species, Andropogon virginicus. The third group comprised a diverse assemblage of 14 species in the middle of the ordination.Comparison of ordination scores with each species's association with pig-induced soil disturbance revealed that members of the Ehrharta group were strongly positively associated with pig activity, whereas members of the Andropogon group were generally negatively associated. The third group showed no association with pig-induced soil disturbance.These results suggest a strong relationship between feral pig activity and the composition of the alien portion of the plant community. Analysis of the ecologies of both plants and pigs suggests that some species may both encourage pig activity and benefit from it. Likewise, other alien plants appear to neither require nor benefit from pig-induced soil disturbance. While pigs appear to play an important role in the organization of these communities, their removal may have a negligible impact on the success of many of the common weeds in the area.