Global patterns of plant diversity and floristic knowledge
Global patterns of plant diversity and floristic knowledge
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DOI：
10.1111/j.1365-2699.2005.01272.x
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发表时间：
2005-07-01
影响因子：
3.9
通讯作者：
Barthlott, W
中科院分区：
文献类型：
--
作者：
Kier, G;Mutke, J;Barthlott, W
目的我们提出了第一个全球地图的维管植物物种丰富度的生态区，并比较这些结果与已发表的文献的全球优先植物保护。在这样做的过程中，我们评估了植物区系，清单和其他已发表的文件中所描述的生态区系知识的状态，并查明了我们对全球维管植物植物群的理解的地理差距。最后，我们探讨了生态区的植物物种丰富度和我们对植物群的了解之间的关系，以及植物丰富度和人类足迹之间的关系-人类活动导致自然栖息地和生态系统的损失和退化的空间明确措施。1800个地理单位我们应用四种方法中的一种来评估丰富度，这取决于数据质量。这些措施包括整理和解释已发表的数据，使用物种面积曲线来推断丰富度，使用分类为基础的数据，并估计来自其他生态区在同一biome.Results植物物种丰富度的最高估计是在婆罗洲低地生态区（10，000种）其次是位于中美洲和南美洲的9个生态区，有>= 8000种;所有物种都在热带和亚热带潮湿阔叶林生物群落中发现。在51个生态区中，超过5000种，只有5个位于温带地区。在867个生态区中，43%的数据质量被认为是良好或中等。在生物群系中，尤其缺乏关于被水淹没的草地和被水淹没的稀树草原的充分数据。我们发现，只有少数生物群落的物种丰富度和数据质量之间的显着相关性，并在所有这些情况下，我们的研究结果表明，物种丰富的生态区比那些穷人在维管植物更好地研究。同样，只有在少数生物群落中，我们发现物种丰富度和人类footprint之间的显着相关性，所有这些都是positive.Main结论-这里提出的工作设置阶段的一致性程度的比较植物物种丰富度与植物特有性和脊椎动物物种丰富度：重要的分析，全面的全球生物多样性战略。我们建议：（1）审查目前的全球植物保护战略，以检查它们是否涵盖了世界上每个主要生物群落中最突出的地区，即使这些地区与其他生物群落相比物种贫乏;（2）在收集和汇编维管植物丰富度数据时，淹没草原和淹没稀树草原应成为全球优先事项;（3）今后的研究如果依赖物种面积的计算，就不使用统一的参数值，而是使用分区域分别得出的值。
Aims We present the first global map of vascular plant species richness by ecoregion and compare these results with the published literature on global priorities for plant conservation. In so doing, we assess the state of floristic knowledge across ecoregions as described in floras, checklists, and other published documents and pinpoint geographical gaps in our understanding of the global vascular plant flora. Finally, we explore the relationships between plant species richness by ecoregion and our knowledge of the flora, and between plant richness and the human footprint - a spatially explicit measure of the loss and degradation of natural habitats and ecosystems as a result of human activities.Location Global.Methods Richness estimates for the 867 terrestrial ecoregions of the world were derived from published richness data of c. 1800 geographical units. We applied one of four methods to assess richness, depending on data quality. These included collation and interpretation of published data, use of species-area curves to extrapolate richness, use of taxon-based data, and estimates derived from other ecoregions within the same biome.Results The highest estimate of plant species richness is in the Borneo lowlands ecoregion (10,000 species) followed by nine ecoregions located in Central and South America with >= 8000 species; all are found within the Tropical and Subtropical Moist Broadleaf Forests biome. Among the 51 ecoregions with >= 5000 species, only five are located in temperate regions. For 43% of the 867 ecoregions, data quality was considered good or moderate. Among biomes, adequate data are especially lacking for flooded grasslands and flooded savannas. We found a significant correlation between species richness and data quality for only a few biomes, and, in all of these cases, our results indicated that species-rich ecoregions are better studied than those poor in vascular plants. Similarly, only in a few biomes did we find significant correlations between species richness and the human footprint, all of which were positive.Main conclusions The work presented here sets the stage for comparisons of degree of concordance of plant species richness with plant endemism and vertebrate species richness: important analyses for a comprehensive global biodiversity strategy. We suggest: (1) that current global plant conservation strategies be reviewed to check if they cover the most outstanding examples of regions from each of the world's major biomes, even if these examples are species-poor compared with other biomes; (2) that flooded grasslands and flooded savannas should become a global priority in collecting and compiling richness data for vascular plants; and (3) that future studies which rely upon species-area calculations do not use a uniform parameter value but instead use values derived separately for subregions.