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The case of the Itata estuary (Bio-Bio Region-Chile) plant formations: anthropogenic interference or natural disturbance-induced diversity enrichment?

机译:itata extuary(生物生物区 - 智利)植物形成的情况:人为干扰或天然扰动诱导的多样性富集?

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摘要

The current study examined the relationship between native and introduced plant species, as indicators of the state of anthropogenic influence on plant formations in the area of the Itata estuary (Bío-Bío Region, Chile). A total of 186 vegetation samples were collected in different plant communities in the wetlands and adjacent areas of the Itata River during 2011 and 2012. The communities of four terrestrial plant formations were sampled within dunes, prairies, shrub lands and food crops, and within two aquatic habitats (freshwater and salt marsh). The total flora comprised of 222 species, these were dominated by introduced taxa with thirty-three species considered invasive for Chile. The high percentage contribution of these alien weeds to the total community could be interpreted as signs of a strong degree of anthropogenic interference in the natural plant formations. However, some habitats such as salt marshes are subjected to periodic natural disturbances (e.g. tsunamis), lacking human interference. Consequently, in some habitats, alien species, which are more resilient, represent the primary plant formations.
机译:目前的研究检测了本地和引入的植物物种之间的关系,作为伊特拉特河口地区植物形成的人为影响的指标(Bío-Bío地区,智利)。在2011年和2012年,在湿地和伊息河河的邻近地区的不同植物社区中收集了总植被群落。在沙丘,大草原,灌木土地和粮食作物内,在沙丘,大草原,灌木土地和粮农组织中进行了抽样的社区水生栖息地(淡水和盐沼)。这些植物总量由222种,这些植物组成,这些植物主要由三十三种物种被认为是智利的侵入性的。这些外星人杂草对全社区的高百分比贡献可以被解释为天然植物形成中强烈的人为干扰的迹象。然而,诸如盐沼等一些栖息地受到周期性的自然紊乱(例如海啸),缺乏人为干扰。因此,在一些栖息地,外来物种,更具弹性,代表原植物形成。

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