Spatiotemporal maintenance of flora in the Himalaya biodiversity hotspot: Current knowledge and future perspectives

Wambulwa, Moses C.; Milne, Richard I.; Wu, Zeng-Yuan; Spicer, Robert A.; Provan, Jim; Luo, Ya‐Huang; Zhu, Guang‐Fu; Wang, Wanting; Wang, Hong; Gao, Lian‐Ming; D, Li; Liu, Jie

doi:10.1002/ece3.7906

Cited by 44 publications

(21 citation statements)

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“…In our study, most populations were concentrated in the vicinity of the Yulong Mountain (approximately at the intersection of latitude 27°N and longitude 100°E). The high species richness of the northern LRGR is consistent with the view that orogeny (which was more intense toward the northern LRGR) was responsible for species diversification in the Himalaya/Hengduan Mountains region ( Wambulwa et al, 2021 ). The observed congruence in species and genetic diversity patterns is a well-known phenomenon ( Vellend and Geber, 2005 ; Vellend et al, 2014 ) and has been observed in both plant and animal communities ( Fan et al, 2018 ; Hu et al, 2021 ).…”

Section: Discussionsupporting

confidence: 84%

Determinants of Genetic Structure in a Highly Heterogeneous Landscape in Southwest China

et al. 2022

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Intra-specific genetic diversity is a fundamental component of biodiversity, and is key to species adaptation and persistence. However, significant knowledge gaps still exist in our understanding of the patterns of genetic diversity and their key determinants. Most previous investigations mainly utilized single-species and/or a limited number of explanatory variables; so here we mapped the patterns of plastid genetic diversity within 15 plant species, and explored the key determinants shaping these patterns using a wide range of variables. Population-level cpDNA sequence data for 15 plant species from the Longitudinal Range Gorge Region (LRGR), southwest China, were retrieved from literature and used to estimate haplotype diversity (HD) and population pairwise genetic differentiation (FST) indices. Genetic diversity and divergence landscape surfaces were then generated based on the HD and FST, respectively, to clarify the patterns of genetic structure in the region. Subsequently, we analyzed the relationships between plastid genetic diversity and 16 explanatory variables (classified as anthropogenic, climatic, and topographic). We found that the highest genetic diversity occurred in the Yulong Mountain region, with a significant proportion (~74.81%) of the high diversity land area being located outside of protected areas. The highest genetic divergence was observed approximately along the 25°N latitudinal line, with notable peaks in the western and eastern edges of the LRGR. Genetic diversity (HD) was weakly but significantly positively correlated with both Latitude (lat) and Annual Mean Wet Day Frequency (wet), yet significantly negatively correlated with all of Longitude (long), Annual Mean Cloud Cover Percent (cld), Annual Mean Anthropogenic Flux (ahf), and Human Footprint Index (hfp). A combination of climatic, topographic, and anthropogenic factors explained a significant proportion (78%) of genetic variation, with topographic factors (lat and long) being the best predictors. Our analysis identified areas of high genetic diversity (genetic diversity “hotspots”) and divergence in the region, and these should be prioritized for conservation. This study contributes to a better understanding of the features that shape the distribution of plastid genetic diversity in the LRGR and thus would inform conservation management efforts in this species-rich, but vulnerable region.

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Section: Discussionsupporting

confidence: 84%

Determinants of Genetic Structure in a Highly Heterogeneous Landscape in Southwest China

et al. 2022

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“…As in most regions in the Hengduan Mountains, most of the cities, villages, and farms in Mount Tai were distributed at low elevations and have been for thousands of years. This long history of disturbance may have exacerbated the evolution and adaptation of biodiversity (Pan et al, 2019; Wambulwa et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Effects of spatial fragmentation on the elevational distribution of bird diversity in a mountain adjacent to urban areas

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Yu²,

Yuan

et al. 2022

Ecology and Evolution

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“…Dated phylogenies of Theaceae indicate that Tribe Theeae, Genus Camellia and Species [Camellia sinensis (L.) O. Kuntze] diverged from their ancestors ∼50 Mya (million years ago), ∼15 Mya, and ∼625 Kya, respectively (38). The two time periods generally coincide with onset of the Tibetan Plateau uplift, rise of the Himalaya/extrusion of Indochina block, and the Mid-Pleistocene glaciations [ (43)(44)(45); Figure 2], events that are thought to have influenced the distribution of plant species and driven lineage divergence in the region (46)(47)(48)(49). Furthermore, genomic analyses and Bayesian computation models indicate that CSS and CSA diverged from their last common ancestor in the middle to upper Pleistocene (25,50).…”

Section: Domestication History Of Teamentioning

confidence: 99%

From the Wild to the Cup: Tracking Footprints of the Tea Species in Time and Space

et al. 2021

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Tea is one of the world's most popular beverages, known for its cultural significance and numerous health benefits. A clear understanding of the origin and history of domestication of the tea species is a fundamental pre-requisite for effective germplasm conservation and improvement. Though there is a general consensus about the center of origin of the tea plant, the evolutionary origin and expansion history of the species remain shrouded in controversy, with studies often reporting conflicting findings. This mini review provides a concise summary of the current state of knowledge regarding the origin, domestication, and dissemination of the species around the world. We note that tea was domesticated around 3000 B.C. either from non-tea wild relatives (probably Camellia grandibracteata and/or C. leptophylla) or intra-specifically from the wild Camellia sinensis var. assamica trees, and that the genetic origins of the various tea varieties may need further inquiry. Moreover, we found that lineage divergence within the tea family was apparently largely driven by a combination of orogenic, climatic, and human-related forces, a fact that could have important implications for conservation of the contemporary tea germplasm. Finally, we demonstrate the robustness of an integrative approach involving linguistics, historical records, and genetics to identify the center of origin of the tea species, and to infer its history of expansion. Throughout the review, we identify areas of debate, and highlight potential research gaps, which lay a foundation for future explorations of the topic.

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Spatiotemporal maintenance of flora in the Himalaya biodiversity hotspot: Current knowledge and future perspectives

Abstract: This is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 44 publications

References 182 publications

Determinants of Genetic Structure in a Highly Heterogeneous Landscape in Southwest China

Determinants of Genetic Structure in a Highly Heterogeneous Landscape in Southwest China

Effects of spatial fragmentation on the elevational distribution of bird diversity in a mountain adjacent to urban areas

From the Wild to the Cup: Tracking Footprints of the Tea Species in Time and Space

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