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Diversity Dimensions of Freshwater Fish Species around the World

Journal of Geographic Information System 2021年第1期13卷 1-18页

作者： Carlos Granado-Lorencio Cástor Guisande Patricia Pelayo-Villamil Ana Manjarrés-Hernández Emilio García-Roselló juergen heine Elisa Pérez-Costas Luis González-Vilas Jacinto González-Dacosta Jorge M. Lobo Departamento de Biología Vegetal y Ecología Facultad de Biología Universidad de Sevilla Seville Spain Facultad de Ciencias del Mar Universidad de Vigo Campus Lagoas-Marcosende Vigo Spain Grupo de Ictiología Universidad de Antioquia Medellín Colombia Instituto Amazónico de Investigaciones (IMANI) Universidad Nacional de Colombia Leticia Colombia Department of Computer Science Universidad de Vigo Campus Lagoas-Marcosende Vigo Spain Departamento de Biogeografía y Cambio Global Museo Nacional de Ciencias Naturales (CSIC) Madrid Spain

The quality and coverage of the available taxonomical and geographical information and the recognition that diversity is multi-faceted are two main factors that hinder to understand the spatial and temporal variations of biodiversity. In this study, we aim to quantify the global distribution of five diversity components used to assess freshwater fish diversity in river basins around the world. The multidimensional character of these diversity components was estimated and the so obtained diversity dimensions mapped. This was done taking into account those well-surveyed basins discriminated by considering collector’s curves, and additionally by controlling for the effect of survey effort on all considered diversity components. A total of 1,472,109 occurrence records were analysed, corresponding to 17,292 species of freshwater fishes. Five diversity components were considered: functional richness, species richness, taxonomic diversity, and two rarity measures. Well-surveyed river basins were discriminated using accumulation curves. The effects of survey biases and knowledge gaps were minimized by determining the relationship of each component with the completeness values calculated for each river basin. The geographical pattern derived from raw data is skewed by the unequal knowledge available, and all diversity components were positively correlated with completeness values. The first dimension described the association between species richness and functional diversity. The second dimension represented rarity and taxonomic diversity. The congruence between species richness and functional diversity suggests that ecosystem functions increase with the number of fish species present in river basins and that a decrease in species richness may involve a loss of functionality. The levels of rarity and taxonomic diversity of many species-poor basins found in arid and cold regions suggest that the distinctiveness of their freshwater fishes is primarily a consequence of how isolated these basins are.

关键词： Diversity Components Functional Diversity Species Richness Rarity Taxonomic Diversity

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引用

美国医学会眼科杂志（中文版） 2006年第4期18卷 248-249页

作者： Burkhard Dasch Andrea Fuhs Thomas Behrens Astrid Meister juergen Wellmann Manfred Fobker Daniel Pauleikhoff Hans-Werner heine 刘亮（译）

目的：评价纤维蛋白原的血浆浓度和高灵敏度C反应蛋白与年龄相关性黄斑病变的关联。方法：从Muenster衰老和视网膜研究的基线检查中．选取一组人群共1060个人．年龄59到82岁。其中，873人（82％）有双眼眼底照、纤维蛋白原和CRP的完整... 详细信息

目的：评价纤维蛋白原的血浆浓度和高灵敏度C反应蛋白与年龄相关性黄斑病变的关联。方法：从Muenster衰老和视网膜研究的基线检查中．选取一组人群共1060个人．年龄59到82岁。其中，873人（82％）有双眼眼底照、纤维蛋白原和CRP的完整数据。潜在的疑似者也包括在横断面分析中。主要结果通过多元线性回归分析测量纤维蛋白原、CRP和年龄相关性黄斑病变的相关性。

关键词：年龄相关性黄斑病变视网膜免疫标志物横断面调查多元线性回归分析纤维蛋白原 C反应蛋白

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