The归化的外来和本地植物物种之间的关系:过去200年来来自东南太平洋海洋岛屿的见解

IF 3.8 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION
Luis Cáceres-Polgrossi, Maura Di Rico, D. Parra, H. Seebens, Stephen D. Galvin, Hans Juergen Boehmer
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引用次数: 0

摘要

目的:本地和归化外来物种之间的关系已经被广泛研究,特别是在大的地理范围内。然而,我们对它们关系的空间和时间变化的了解仍然有限,特别是对于偏远的海洋岛屿,如东南太平洋的岛屿以及跨岛屿和群岛的岛屿。在这项研究中,我们的目的是通过分析过去200年来,除了物种丰富度的时间变化外,不同空间尺度上的物种-区域关系的当前模式,来评估本地和归化外来物种之间的关系。地区:一个岛屿(拉帕努伊)和两个群岛(胡安·费尔南德斯和德斯文图拉达斯群岛),共包括11个东南太平洋海洋岛屿(OISEP)。方法:我们从目前可用的岛屿植物群清单中收集了OISEP血管植物群的最全面数据集,并根据最新出版物进行了更新。每种植物都被分类为本地或归化的外来物种。我们根据每个归化外来物种的第一个采集年份,通过估计物种丰富度、归化率和归化与本地比率来研究时间变化。然后,我们通过对比线性回归、指数回归、S型回归和威布尔回归的拟合,确定了归化外来物种丰富度随时间积累的最佳形状。最后,我们首先在群岛间尺度上通过拟合岛屿-物种-面积关系模型来分析原生物种和归化物种之间的关系,其次在岛屿尺度上通过对残差值进行区间主轴回归分析来分析原生种和归化种之间的关系。结果:OISEP植物区系数据集包含674种,其中282种为本地物种,392种为归化外来物种。本地岛屿物种-区域关系与归化外来物种相似。随着时间的推移,归化外来物种的丰富度显著增加,在1950年和2000年出现了两个明显的峰值。威布尔回归和随时间的指数形状是群岛间尺度上归化外来物种丰富度积累的最合适拟合,这进一步强调了在本文研究的时间段内归化外来物种丰度的显著增加。主要结论:归化外来物种丰富度和本地物种丰富度之间的关系与地理尺度无关。在大多数岛屿上,归化外来物种的数量明显超过了本地物种的数量,但在整个OISEP中也是如此。新发现的归化外来物种的积累没有显示出任何饱和的迹象,未来很可能会有新物种出现。需要加大监测、预防和生物安全力度,以阻止生物入侵这些独特的岛屿生态系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The relationship between naturalized alien and native plant species: insights from oceanic islands of the south-east Pacific over the last 200 years
Aim: The relationship between native and naturalized alien species has been widely studied, particularly across large geographic scales. However, our knowledge of the spatial and temporal variations of their relationships is still limited, particularly for remote oceanic islands such as those of the south-east Pacific and across islands and archipelagos. In this study, we aim to assess the relationships between native and naturalized alien species by analyzing their current patterns of species-area relationships at different spatial scales, in addition to temporal variations in species richness, over the last 200 years. Area: One island (Rapa Nui) and two archipelagos (Juan Fernandez and Desventuradas Islands) comprising a total of 11 oceanic islands of the south-east Pacific (OISEP). Methods: We assembled the most comprehensive dataset of the vascular flora of the OISEP from currently available island flora checklists and updated with recent publications. Each plant species was classified as being native or naturalized alien. We examined temporal changes by estimating species richness, naturalization rates and naturalized-to-native ratios over time based on the first collection year of each naturalized alien species. Then, we determined the best shape of naturalized alien species richness accumulation over time by contrasting the fit of lineal, exponential, sigmoidal and Weibull regressions. Finally, we analyzed the relationships between native and naturalized species firstly at the inter-archipelagic scale by fitting island species-area relationship models and secondly at the island scale by performing ranged major axis regression analysis on residual values. Results: The OISEP flora dataset contained 674 species of which 282 were native and 392 were naturalized alien. Native island species-area relationships were similar to those of the naturalized alien species. Naturalized alien species richness increased notably through time with two clear peaks in 1950 and 2000. A Weibull regression and an exponential shape over time were the most appropriate fits for naturalized alien species richness accumulations at the inter-archipelagic scale, which further emphasizes the notable increase in naturalized alien species richness experienced in the timeframe examined here. Main conclusions: The relationship between naturalized alien species richness and native species richness was found to be independent of the geographic scale. The number of naturalized alien species clearly exceeded the number of native species on most islands but also for the whole OISEP. The accumulation of newly detected naturalized alien species does not show any sign of saturation and it is likely that new species will arrive in the future. Increased efforts on monitoring, prevention and biosecurity are needed to halt biological invasions on these unique island ecosystems.
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来源期刊
Neobiota
Neobiota Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.10
自引率
7.80%
发文量
0
审稿时长
6 weeks
期刊介绍: NeoBiota is a peer-reviewed, open-access, rapid online journal launched to accelerate research on alien species and biological invasions: aquatic and terrestrial, animals, plants, fungi and micro-organisms. The journal NeoBiota is a continuation of the former NEOBIOTA publication series; for volumes 1-8 see http://www.oekosys.tu-berlin.de/menue/neobiota All articles are published immediately upon editorial approval. All published papers can be freely copied, downloaded, printed and distributed at no charge for the reader. Authors are thus encouraged to post the pdf files of published papers on their homepages or elsewhere to expedite distribution. There is no charge for color.
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