Abstract
Indirect climate effects on tree fecundity that come through variation in size and growth (climate-condition interactions) are not currently part of models used to predict future forests. Trends in species abundances predicted from meta-analyses and species distribution models will be misleading if they depend on the conditions of individuals. Here we find from a synthesis of tree species in North America that climate-condition interactions dominate responses through two pathways, i) effects of growth that depend on climate, and ii) effects of climate that depend on tree size. Because tree fecundity first increases and then declines with size, climate change that stimulates growth promotes a shift of small trees to more fecund sizes, but the opposite can be true for large sizes. Change the depresses growth also affects fecundity. We find a biogeographic divide, with these interactions reducing fecundity in the West and increasing it in the East. Continental-scale responses of these forests are thus driven largely by indirect effects, recommending management for climate change that considers multiple demographic rates.
Original language | English |
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Article number | 1242 |
Journal | Nature Communications |
Volume | 12 |
Issue number | 1 |
DOIs | |
State | Published - Dec 1 2021 |
Externally published | Yes |
Funding
For access to sites and logistical support, we thank the National Ecological Observatory Network (NEON). For comments on the manuscript, we thank Valentin Journe and Becky Tang. The project was funded for three decades by the National Science Foundation (most recently, DEB-1754443), and by the Belmont Forum (1854976), NASA (AIST16-0052, AIST18-0063), and the Programme d’Investisse-ment d’Avenir under project FORBIC (18-MPGA-0004). Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the US Government.
Funders | Funder number |
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National Science Foundation | DEB-1754443, 1854976 |
National Aeronautics and Space Administration | AIST16-0052, 18-MPGA-0004, AIST18-0063 |