Jesús E. Sáenz-Ceja , José Á. Villarreal-Quintanilla , David Castillo-Quiroz
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The xeric shrubland hosted the highest species richness, endemic, micro-endemic, and threatened species. The most representative families were Asteraceae, Poaceae, and Fabaceae. Chisos, Davis, and Glass were the sky islands that hosted the most species richness, each above 770 species. Most endemic and micro-endemic species were found in Chisos, La Fragua, La Madera, La Paila, and Roque. Meanwhile, most threatened species were found in La Encantada, La Paila, La Vega, Maderas del Carmen, and San Francisco Desmontes. Moreover, human influence was low in 80% of the sky islands. Davis, Organ, and Glass experienced high land cover change, whereas 30% of the sky island surface was protected. The priority sky islands were Big Bend, Chinati, Chisos, Davis, Glass, Franklin, La Encantada, La Gavia, La Madera, La Paila, La Vega, Las Delicias, Maderas del Carmen, Organ, Roque, and San Francisco Desmontes. 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This study characterized the floristic diversity within the 54 sky islands from species occurrence records. Moreover, geographical patterns of species richness, endemism, micro-endemism, extinction risk, human influence, land cover change, and protected land were criteria to identify the priority sky islands for conservation. Within the Chihuahuan Archipelago, 135 families, 731 genera, and 2,244 species were recorded, of which 296 were endemic, 95 were micro-endemic, and 45 were threatened. The xeric shrubland hosted the highest species richness, endemic, micro-endemic, and threatened species. The most representative families were Asteraceae, Poaceae, and Fabaceae. Chisos, Davis, and Glass were the sky islands that hosted the most species richness, each above 770 species. Most endemic and micro-endemic species were found in Chisos, La Fragua, La Madera, La Paila, and Roque. 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引用次数: 0
摘要
奇瓦瓦群岛的天空岛屿是由奇瓦瓦沙漠包围的山地孤立系统。尽管它们与保护有关,但植物区系多样性模式被误解了。本文从物种发生记录中对54个天空岛的植物区系多样性进行了分析。此外,物种丰富度、特有、微特有、灭绝风险、人类影响、土地覆盖变化和受保护土地的地理格局是确定优先保护天空岛屿的标准。奇瓦瓦群岛共记录到135科731属2244种,其中特有种296种,微特有种95种,濒危45种。干性灌丛具有最高的物种丰富度、特有种、微特有种和濒危物种。最具代表性的科为菊科、豆科和豆科。奇索斯岛、戴维斯岛和格拉斯岛是物种丰富度最高的天空岛屿,每个岛屿的物种丰富度都在770以上。大多数特有种和微特有种分布在奇索斯、拉弗拉格、拉马德拉、拉帕伊拉和罗克。同时,在La Encantada、La Paila、La Vega、Maderas del Carmen和San Francisco Desmontes发现了最受威胁的物种。此外,在80%的天空岛屿上,人类的影响很低。Davis, Organ和Glass经历了高土地覆盖变化,而30%的天空岛表面受到保护。优先的天空岛屿是Big Bend、Chinati、Chisos、Davis、Glass、Franklin、La Encantada、La Gavia、La Madera、La Paila、La Vega、Las Delicias、Maderas del Carmen、Organ、Roque和San Francisco Desmontes。我们的研究结果对保护奇瓦瓦群岛植物多样性的策略至关重要。
Floristic diversity as a reference for the conservation of the sky islands of the Chihuahuan Archipelago
The sky islands of the Chihuahuan Archipelago are montane isolated systems surrounded by the Chihuahuan Desert. Despite their relevance for conservation, floristic diversity patterns are misunderstood. This study characterized the floristic diversity within the 54 sky islands from species occurrence records. Moreover, geographical patterns of species richness, endemism, micro-endemism, extinction risk, human influence, land cover change, and protected land were criteria to identify the priority sky islands for conservation. Within the Chihuahuan Archipelago, 135 families, 731 genera, and 2,244 species were recorded, of which 296 were endemic, 95 were micro-endemic, and 45 were threatened. The xeric shrubland hosted the highest species richness, endemic, micro-endemic, and threatened species. The most representative families were Asteraceae, Poaceae, and Fabaceae. Chisos, Davis, and Glass were the sky islands that hosted the most species richness, each above 770 species. Most endemic and micro-endemic species were found in Chisos, La Fragua, La Madera, La Paila, and Roque. Meanwhile, most threatened species were found in La Encantada, La Paila, La Vega, Maderas del Carmen, and San Francisco Desmontes. Moreover, human influence was low in 80% of the sky islands. Davis, Organ, and Glass experienced high land cover change, whereas 30% of the sky island surface was protected. The priority sky islands were Big Bend, Chinati, Chisos, Davis, Glass, Franklin, La Encantada, La Gavia, La Madera, La Paila, La Vega, Las Delicias, Maderas del Carmen, Organ, Roque, and San Francisco Desmontes. Our findings are crucial to inform strategies to conserve the floristic diversity in the Chihuahuan Archipelago.
期刊介绍:
The Journal for Nature Conservation addresses concepts, methods and techniques for nature conservation. This international and interdisciplinary journal encourages collaboration between scientists and practitioners, including the integration of biodiversity issues with social and economic concepts. Therefore, conceptual, technical and methodological papers, as well as reviews, research papers, and short communications are welcomed from a wide range of disciplines, including theoretical ecology, landscape ecology, restoration ecology, ecological modelling, and others, provided that there is a clear connection and immediate relevance to nature conservation.
Manuscripts without any immediate conservation context, such as inventories, distribution modelling, genetic studies, animal behaviour, plant physiology, will not be considered for this journal; though such data may be useful for conservationists and managers in the future, this is outside of the current scope of the journal.