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Global distribution of coral diversity: Biodiversity knowledge gradients related to spatial resolution

机译：珊瑚多样性的全球分布：与空间分辨率有关的生物多样性知识梯度

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摘要

Biodiversity knowledge shortfalls, especially incomplete information on species distributions, can lead to false conclusions about global biodiversity patterns. Diversity estimation theory statistically uses species occurrence records and sampling completeness (coverage) to predict diversity in terms of species richness, dominance and evenness. We estimated Scleractinia coral species diversity at different spatial resolutions, based on 109,296 occurrences and range data for 697 species, using an incidence-based Hill's numbers approach through a rarefaction and extrapolation technique. We found that spatial patterns of diversity estimates were dependent on a geographic scale. The latitudinal and longitudinal diversity gradients, particularly at finer spatial scales, differed from species range-based coral biodiversity hotspots of previous studies. The western Indian Ocean was predicted to have the most coral species, with greater diversities than in the Indo-Pacific Coral Triangle. We concluded that the identification of marine biodiversity hotspots is sensitive to species commission errors (from range maps) and biased sampling coverage. Moreover, estimates of the geographic distribution of species richness informed us of a set of priority areas (the northeastern coast of Australia, central Coral Triangle and coast of Madagascar) for future sampling of unknown coral species occurrence. Our findings of biogeographical survey priorities contribute to filling biodiversity shortfalls for tropical coral reefs through sampling completeness, and consequently for development of conservation planning.
机译：生物多样性知识的不足，特别是关于物种分布的信息不完整，可能导致对全球生物多样性模式的错误结论。多样性估计理论从统计学角度使用物种发生记录和采样完整性（覆盖率）来预测物种丰富度，优势度和均匀度方面的多样性。我们基于109,296次发生和697种物种的距离数据，使用基于稀疏和外推技术的基于事件的希尔数方法，估计了不同空间分辨率下的巩膜珊瑚物种多样性。我们发现多样性估计的空间模式取决于地理范围。纬度和纵向的多样性梯度，特别是在较小的空间尺度上，不同于先前研究中基于物种范围的珊瑚生物多样性热点。据预测，西印度洋的珊瑚物种最多，其多样性比印度太平洋太平洋珊瑚三角地区更大。我们得出的结论是，海洋生物多样性热点的识别对物种委托误差（来自距离图）和有偏差的采样范围很敏感。此外，对物种丰富度的地理分布的估计为我们提供了一组优先区域（澳大利亚的东北海岸，中部珊瑚三角洲和马达加斯加的海岸），以便将来对未知的珊瑚物种发生进行采样。我们对生物地理调查重点的发现有助于通过采样完整性来填补热带珊瑚礁的生物多样性短缺，从而有助于制定保护计划。

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  • 来源
    《Ecological research》 |2020年第2期|315-326|共12页
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    Royal Bot Gardens Richmond Surrey England|Univ Ryukyus Fac Sci Okinawa Japan|Okinawa Prefecture Environm Sci Ctr Okinawa Japan;

    Univ Auckland Sch Environm Auckland New Zealand;

    Univ Ryukyus Fac Sci Okinawa Japan|Univ Ryukyus Marine & Terr Field Ecol Trop Biosphere Res Ctr Okinawa Japan;

    Univ Ryukyus Fac Sci Okinawa Japan;

    Natl Taiwan Univ Inst Oceanog Taipei Taiwan;

    Univ Hong Kong Sch Biol Sci Hong Kong Peoples R China|Univ Hong Kong Swire Inst Marine Sci Hong Kong Peoples R China;

    Natl Tsing Hua Univ Inst Stat Hsinchu Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    coral reefs; Hill's number; species incidence; sampling bias; marine biodiversity hotspots;

    机译：珊瑚礁;希尔的电话号码;物种发生率采样偏差海洋生物多样性热点;

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