Forecasting range shifts of dioecious plants under climate change

• 成果类型: Article
• 署名作者: Moutouama, Jacob K.; Compagnoni, Aldo; Miller, Tom E. X.
• 署名单位: Rice University; Martin Luther University Halle Wittenberg; German Research Foundation (DFG); German Centre for Integrative Biodiversity Research (iDiv)
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-9648
• DOI: 10.1073/pnas.2422162122
• 发表日期: 2025-05-27
• 关键词: sex-ratio; population viability; EVOLUTION; responses; dispersal; niches; GROWTH

摘要

Global climate change has triggered an urgent need for predicting the reorganization of Earth's biodiversity. For dioecious species (those with separate sexes), it is unclear how commonly unique climate sensitivities of females and males could influence projections for species-level responses to climate change. We developed demographic models of range limitation, parameterized from geographically distributed common garden experiments, with females and males of a dioecious grass species (Poa arachnifera) throughout and beyond its range in the south-central U.S. We contrasted predictions of a standard female-dominant model with those of a two-sex model that accounts for feedbacks between sex ratio and vital rates. Both model versions predict that future climate change will induce a poleward shift of niche suitability beyond current northern limits. However, the magnitude of the poleward shift was underestimated by the female-dominant model because females have broader temperature tolerance than males but become mate-limited under female-biased sex ratios, which are forecasted to become more common under future climate. Our results illustrate how explicitly accounting for both sexes can enhance population viability forecasts and conservation planning for dioecious species in response to climate change.