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Latitudinal patterns in stabilizing density dependence of forest communities
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Document Title
Latitudinal patterns in stabilizing density dependence of forest communities
Author
H?lsmann L., Chisholm R.A., Comita L., Visser M.D., de Souza Leite M., Aguilar S., Anderson-Teixeira K.J., Bourg N.A., Brockelman W.Y., Bunyavejchewin S., Casta?o N., Chang-Yang C.-H., Chuyong G.B., Clay K., Davies S.J., Duque A., Ediriweera S., Ewango C., Gilbert G.S., Hol?k J., Howe R.W., Hubbell S.P., Itoh A., Johnson D.J., Kenfack D., Kr?l K., Larson A.J., Lutz J.A., Makana J.-R., Malhi Y., McMahon S.M., McShea W.J., Mohamad M., Nasardin M., Nathalang A., Norden N., Oliveira A.A., Parmigiani R., Perez R., Phillips R.P., Pongpattananurak N., Sun I.-F., Swanson M.E., Tan S., Thomas D., Thompson J., Uriarte M., Wolf A.T., Yao T.L., Zimmerman J.K., Zuleta D., Hartig F.
Affiliations
CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, 666303, China; National Center for Genetic Engineering and Biotechnology (BIOTEC), 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani12120, Thailand
Type
Article
Source Title
Plant Diversity
ISSN
20962703
Year
2024
Volume
46
Issue
2
Page
181-193
Open Access
All Open Access, Gold
Publisher
KeAi Publishing Communications Ltd.
DOI
10.1016/j.pld.2023.08.003
Abstract
Hybridization plays a significant role in biological evolution. However, it is not clear whether ecological contingency differentially influences likelihood of hybridization, particularly at ecological margins where parental species may exhibit reduced fitnesses. Moreover, it is unknown whether future ecosystem change will increase the prevalence of hybridization. Ficus heterostyla and F. squamosa are closely related species co-distributed from southern Thailand to southwest China where hybridization, yielding viable seeds, has been documented. As a robust test of ecological factors driving hybridization, we investigated spatial hybridization signatures based on nuclear microsatellites from extensive population sampling across a widespread contact range. Both species showed high population differentiation and strong patterns of isolation by distance. Admixture estimates exposed asymmetric interspecific gene flow. Signatures of hybridization increase significantly towards higher latitude zones, peaking at the northern climatic margins. Geographic variation in reproductive phenology combined with ecologically challenging marginal habitats may promote this phenomenon. Our work is a first systematic evaluation of such patterns in a comprehensive, latitudinally-based clinal context, and indicates that tendency to hybridize appears strongly influenced by environmental conditions. Moreover, that future climate change scenarios will likely alter and possibly augment cases of hybridization at ecosystem scales. ? 2023 Kunming Institute of Botany, Chinese Academy of Sciences
License
CC BY-NC-ND
Rights
Kunming Institute of Botany, Chinese Academy of Sciences
Publication Source
WoS