Decoupled spatiotemporal patterns of avian taxonomic and functional diversity

Decoupled spatiotemporal patterns of avian taxonomic and functional diversity
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鸟类分类和功能多样性的解耦时空模式

DOI:
10.1016/j.cub.2023.01.066
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发表时间:
2023
期刊:
影响因子:
9.2
通讯作者:
Stagge, James H.
Stagge, James H.
中科院分区:
生物学1区
文献类型:
--
作者:
Jarzyna, Marta A.;Stagge, James H.

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每年,季节性的鸟类迁徙导致物种发生和丰度的巨大重新分配,1,2,3与普遍的,虽然不清楚,多方面的鸟类多样性的模式的后果。在这里,我们揭示了美国大陆鸟类分类多样性(TD)和功能多样性(FD)之间的时空变化的明显差异。我们发现,物种丰富度的季节性预期3遵循纬度梯度,而FD的季节性,而不是表现出明显的东西梯度。在美国东部,TD和FD的时间模式截然相反。在冬季,尽管季节性物种损失,但功能丰富度最高,剩余的最丰富的物种相对于一年中的其他时间聚集在功能空间的较少区域,这可能反映了资源可用性的下降。相比之下,TD和FD的时间特征在美国西部更为一致。在那里,物种和功能丰富度都在繁殖季节达到高峰,物种的丰度比冬季更有规律地分布在功能空间中。我们的研究结果表明,在美国西部的候鸟不成比例地有助于鸟类FD拥有更多的独特的性状特征比居民的鸟类,4,5而在美国东部的移民的主要贡献是通过增加的规律性的丰度内的功能空间相对于其余的一年。我们预计,发现的复杂性之间的时空关联的鸟类多样性的措施将是催化剂,采用明确的时间框架,多方面的生物多样性分析。
Each year, seasonal bird migration leads to an immense redistribution of species occurrence and abundances,1,2,3with pervasive, though unclear, consequences for patterns of multi-faceted avian diversity. Here, we uncover stark disparities in spatiotemporal variation between avian taxonomic diversity (TD) and functional diversity (FD) across the continental US. We show that the seasonality of species richness expectedly3follows a latitudinal gradient, whereas seasonality of FD instead manifests a distinct east-west gradient. In the eastern US, the temporal patterns of TD and FD are diametrically opposed. In winter, functional richness is highest despite seasonal species loss, and the remaining most abundant species are amassed in fewer regions of the functional space relative to the rest of the year, likely reflecting decreased resource availability. In contrast, temporal signatures for TD and FD are more congruent in the western US. There, both species and functional richness peak during the breeding season, and species' abundances are more regularly distributed and widely spread across the functional space than during winter. Our results suggest that migratory birds in the western US disproportionately contribute to avian FD by possessing more unique trait characteristics than resident birds,4,5while the primary contribution of migrants in the eastern US is through increasing the regularity of abundances within the functional space relative to the rest of the year. We anticipate that the uncovered complexity of spatiotemporal associations among measures of avian diversity will be the catalyst for adopting an explicitly temporal framework for multi-faceted biodiversity analysis.
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DOI: --
发表时间: 2015
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