The influence of temporal scale selection on pelagic habitat biodiversity indicators

The influence of temporal scale selection on pelagic habitat biodiversity indicators
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时间尺度选择对中上层生境生物多样性指标的影响

DOI:
10.1016/j.ecolind.2020.106311
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发表时间:
2020
影响因子:
6.9
通讯作者:
Bedford J
Bedford J
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Bedford J

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生物多样性指标的制定是根据《欧洲海洋战略框架指令》制定海洋战略的一个组成部分。制定生物多样性指标的一个关键阶段是选择一个适当的时间尺度来评估指标状态的变化。由于浮游生物动态固有的随机性,以及指标对气候驱动的变化和直接可管理的压力的敏感性,这对制定浮游生物指标以评估浮游生物栖息地的状况提出了特别的挑战。使用两种浮游生物指标,我们证明,指标评估的结果内在地受到评估指标的时间尺度的影响。例如,我们表明,与只包括政权更迭后的数据相比,纳入20世纪80年代政权更迭之前的数据往往会改变对变化的评估。我们强调指出,最终选定的适当时间尺度取决于所处理的政策问题。我们还建议,在评估中报告多个时间尺度的指标有助于提供与当代管理相关的信息,同时还保留关键的数十年趋势,如气候变化造成的趋势。
The development of biodiversity indicators is an integral component of forming marine strategies under the European Marine Strategy Framework Directive (MSFD). A key stage in the development of biodiversity indicators is the selection of an appropriate temporal scale over which to assess change in indicator state. This presents a particular challenge for the development of plankton indicators for assessing the state of pelagic habitats, due to the inherent stochasticity of plankton dynamics and the sensitivity of indicators to both climate-driven change and directly manageable pressures. Using two plankton indicator metrics, we demonstrate that the outcome of indicator assessments is inherently influenced by the temporal scale of the time-period over which the indicators are assessed. For example, we show that the inclusion of data from before a regime shift that occurred in the 1980s often alters the assessment of change compared to only including data from after the regime shift. We highlight that ultimately the appropriate temporal scale selected depends on the policy questions being addressed. We also suggest that reporting indicators over multiple temporal scales within an assessment helps provide information relevant to contemporary management, whilst also retaining crucial multi-decadal trends such as those caused by climate change.
生态系统管理的时间限制:欧洲区域海洋的定义和例子
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