Diversity of Nearctic Dragonflies and Damselflies (Odonata)
Diversity of Nearctic Dragonflies and Damselflies (Odonata)
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DOI：
10.3390/d14070575
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发表时间：
2022-07-01
期刊：
影响因子：
2.4
通讯作者：
Belitz, Michael W.
中科院分区：
文献类型：
--
作者：
Abbott, John C.;Bota-Sierra, Cornelio A.;Belitz, Michael W.
很少有研究评估蜻蜓的多样性，包括加拿大，美国和墨西哥整个新北地区。首次，我们探讨了蜻蜓物种多样性在这一地区根据自然群落组合的定义，并产生物种分布模型（SDM）。物种发生的数据进行了汇编，通过审查数据库的标本保存的重要蜻蜓资源库，并通过广泛的文献参考。物种被分为森林依赖或非森林依赖，作为lentic或lotic依赖，并根据保护状况。所有物种的预测分布在其整个范围内堆叠，包括新北区以外的地区。然后计算每个网格单元的物种丰富度和校正加权特有性（CWE）。我们发现了一种模式，更大的物种丰富度在东部的新北，这可以解释为较高的水生栖息地的多样性在微观和宏观尺度的落基山脉以东，促进生态位分区和专业化。在新北地区，美国东南部拥有最多的蜻蜓和豆娘的特有物种;这种程度的特有性可能是由于冰川避难所为丰富而独特的生物群的进化提供了基础。
Rarely have studies assessed Odonata diversity for the entire Nearctic realm by including Canada, the United States, and Mexico. For the first time, we explored Odonata diversity in this region according to a definition of natural community assemblages and generated species distribution models (SDMs). Species occurrence data were assembled by reviewing databases of specimens held by significant Odonata repositories and through an extensive search of literature references. Species were categorized as forest-dependent or non-forest-dependent, as lentic or lotic-dependent, and according to conservation status. Predicted distributions were stacked for all species across their entire ranges, including areas outside of the Nearctic. Species richness and corrected weighted endemism (CWE) were then calculated for each grid cell. We found a pattern of greater species richness in the eastern portion of the Nearctic, which can be explained by the higher aquatic habitat diversity at micro and macroscales east of the Rocky Mountains, promoting niche partitioning and specialization. In the Nearctic region, the southeastern US has the highest number of endemic species of dragonflies and damselflies; this degree of endemism is likely due to glacial refuges providing a foundation for the evolution of a rich and unique biota.