Drought timing and local climate determine the sensitivity of eastern temperate forests to drought.
| Autor: | D'Orangeville L; Department of Biology, Indiana University, Bloomington, IN, USA.; Centre d'Étude de la Forêt, Université du Québec à Montréal, Montréal, QC, Canada., Maxwell J; Department of Geography, Indiana University, Bloomington, IN, USA., Kneeshaw D; Centre d'Étude de la Forêt, Université du Québec à Montréal, Montréal, QC, Canada., Pederson N; Harvard Forest, Harvard University, Petersham, MA, USA., Duchesne L; Direction de la Recherche Forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, Québec City, QC, Canada., Logan T; Ouranos Climate Change Consortium, Montreal, QC, Canada., Houle D; Direction de la Recherche Forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, Québec City, QC, Canada.; Ouranos Climate Change Consortium, Montreal, QC, Canada., Arseneault D; Department of Biology, Chemistry and Geography, Université du Québec à Rimouski, Rimouski, QC, Canada., Beier CM; Department of Forest and Natural Resources Management, SUNY-ESF, Syracuse, NY, USA., Bishop DA; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, USA., Druckenbrod D; Geological, Environmental, and Marine Sciences, Rider University, Lawrenceville, NJ, USA., Fraver S; School of Forest Resources, University of Maine, Orono, ME, USA., Girard F; Department of Geography, Université de Montréal, Montréal, QC, Canada., Halman J; Vermont Department of Forests, Parks & Recreation, Essex Junction, VT, USA., Hansen C; Rubenstein School of the Environment and Natural Resources, University of Vermont, Burlington, VT, USA., Hart JL; Department of Geography, University of Alabama, Tuscaloosa, AL, USA., Hartmann H; Department of Biogeochemical Processes, Max Planck Institute for Biogeochemistry, Jena, Germany., Kaye M; Department of Ecosystem Science and Management, Penn State College of Agricultural Sciences, State College, PA, USA., Leblanc D; Department of Biology, Ball State University, Muncie, IN, USA., Manzoni S; Stockholm University, Stockholm, Sweden., Ouimet R; Direction de la Recherche Forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, Québec City, QC, Canada., Rayback S; Department of Geography, University of Vermont, Burlington, VT, USA., Rollinson CR; The Morton Arboretum, Lisle, IL, USA., Phillips RP; Department of Biology, Indiana University, Bloomington, IN, USA. |
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| Jazyk: | angličtina |
| Zdroj: | Global change biology [Glob Chang Biol] 2018 Jun; Vol. 24 (6), pp. 2339-2351. Date of Electronic Publication: 2018 Mar 24. |
| DOI: | 10.1111/gcb.14096 |
| Abstrakt: | Projected changes in temperature and drought regime are likely to reduce carbon (C) storage in forests, thereby amplifying rates of climate change. While such reductions are often presumed to be greatest in semi-arid forests that experience widespread tree mortality, the consequences of drought may also be important in temperate mesic forests of Eastern North America (ENA) if tree growth is significantly curtailed by drought. Investigations of the environmental conditions that determine drought sensitivity are critically needed to accurately predict ecosystem feedbacks to climate change. We matched site factors with the growth responses to drought of 10,753 trees across mesic forests of ENA, representing 24 species and 346 stands, to determine the broad-scale drivers of drought sensitivity for the dominant trees in ENA. Here we show that two factors-the timing of drought, and the atmospheric demand for water (i.e., local potential evapotranspiration; PET)-are stronger drivers of drought sensitivity than soil and stand characteristics. Drought-induced reductions in tree growth were greatest when the droughts occurred during early-season peaks in radial growth, especially for trees growing in the warmest, driest regions (i.e., highest PET). Further, mean species trait values (rooting depth and ψ (© 2018 John Wiley & Sons Ltd.) |
| Databáze: | MEDLINE |
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