Eco-evolutionary evidence for the global diversity pattern of Cycas (Cycadaceae)

doi:10.1111/jipb.13638

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	Eco-evolutionary evidence for the global diversity pattern of Cycas (Cycadaceae)
	Liu, Jian; Lindstrom, Anders J.; Gong, Yiqing; Dong, Shanshan; Liu, Yusheng (Chris); Zhang, Shouzhou; Gong, Xun
	2024
发表期刊	JOURNAL OF INTEGRATIVE PLANT BIOLOGY
ISSN	1672-9072
卷号	66 期号:6 页码:1170-1191
摘要	The evolution of the latitudinal diversity gradient (LDG), characterized by a peak in diversity toward the tropics, has captured significant attention in evolutionary biology and ecology. However, the inverse LDG (i-LDG) mechanism, wherein species richness increases toward the poles, remains inadequately explored. Cycads are among one of the oldest lineages of extant seed plants and have undergone extensive diversification in the tropics. Intriguingly, the extant cycad abundance exhibits an i-LDG pattern, and the underlying causes for this phenomenon remain largely elusive. Here, using 1,843 nuclear genes from a nearly complete sampling, we conducted comprehensive phylogenomic analyses to establish a robust species-level phylogeny for Cycas, the largest genus within cycads. We then reconstructed the spatial-temporal dynamics and integrated global environmental data to evaluate the roles of species ages, diversification rates, contemporary environment, and conservatism to ancestral niches in shaping the i-LDG pattern. We found Cycas experienced decreased diversification rates, coupled with the cooling temperature since its origin in the Eocene from continental Asia. Different regions have distinctively contributed to the formation of i-LDG for Cycas, with the northern hemisphere acting as evolutionary museums and the southern hemisphere serving as cradles. Moreover, water-related climate variables, specifically precipitation seasonality and potential evapotranspiration, were identified as paramount factors constraining Cycas species richness in the rainforest biome near the equator. Notably, the adherence to ancestral monsoonal climates emerges as a critical factor in sustaining the diversity pattern. This study underscores the imperative of integrating both evolutionary and ecological approaches to comprehensively unravel the mechanisms underpinning global biodiversity patterns.
DOI	10.1111/jipb.13638
WOS记录号	WOS:001184376200001
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/76370
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Liu, Jian,Lindstrom, Anders J.,Gong, Yiqing,et al. Eco-evolutionary evidence for the global diversity pattern of Cycas (Cycadaceae)[J]. JOURNAL OF INTEGRATIVE PLANT BIOLOGY,2024,66(6):1170-1191.
APA	Liu, Jian.,Lindstrom, Anders J..,Gong, Yiqing.,Dong, Shanshan.,Liu, Yusheng .,...&Gong, Xun.(2024).Eco-evolutionary evidence for the global diversity pattern of Cycas (Cycadaceae).JOURNAL OF INTEGRATIVE PLANT BIOLOGY,66(6),1170-1191.
MLA	Liu, Jian,et al."Eco-evolutionary evidence for the global diversity pattern of Cycas (Cycadaceae)".JOURNAL OF INTEGRATIVE PLANT BIOLOGY 66.6(2024):1170-1191.

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