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Eastern white pine and eastern hemlock growth: possible tradeoffs in response of canopy trees to climate.
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- Author(s): Stern, Rebecca L.1 ; Schaberg, Paul G.2; Rayback, Shelly A.3; Murakami, Paula F.1,2; Hansen, Christopher F.1,2; Hawley, Gary J.1,3
- Source:
Canadian Journal of Forest Research. 2021, Vol. 51 Issue 12, p1926-1938. 13p.- Subject Terms:
- Source:
- Additional Information
- Abstract: A warming climate and extended growing season may confer competitive advantages to temperate conifers that can photosynthesize across seasons. Whether this potential translates into increased growth is unclear, as is whether pollution could constrain growth. We examined two temperate conifers — eastern white pine (Pinus strobus L.) and eastern hemlock (Tsuga canadensis (L.) Carrière) — and analyzed associations between growth (476 trees in 23 plots) and numerous factors, including climate and pollutant deposition variables. Both species exhibited increasing growth over time and eastern white pine showed greater maximum growth. Higher spring temperatures were associated with greater growth for both species, as were higher autumnal temperatures for eastern hemlock. Negative correlations were observed with previous year (eastern hemlock) and current year (eastern white pine) summer temperatures. Spring and summer moisture availability were positively correlated with growth for eastern white pine throughout its chronology, whereas for hemlock, correlations with moisture shifted from being significant with current year's growth to previous year's growth over time. The growth of these temperate conifers might benefit from higher spring (both species) and fall (eastern hemlock) temperatures, though this could be offset by reductions in growth associated with hotter, drier summers. [ABSTRACT FROM AUTHOR]
- Abstract: Un climat plus chaud et une saison de croissance plus longue pourrait conférer des avantages compétitifs aux conifères de la zone tempérée chez qui la photosynthèse peut se poursuivre en toute saison. Il n'est pas clair si cette possibilité pourrait se traduire par une croissance accrue et de même si la pollution pourrait limiter la croissance. Nous avons étudié deux conifères de la zone tempérée : le pin blanc (Pinus strobus L.) et la pruche du Canada (Tsuga canadensis (L.) Carrière), et nous avons analysé les liens entre la croissance (476 arbres dans 23 places échantillons) et plusieurs facteurs, incluant des variables liées au climat et aux retombées de polluants. Les deux espèces ont augmenté leur croissance avec le temps et le pin blanc a connu la croissance maximum la plus élevée. Les températures printanières élevées étaient associées à une plus forte croissance chez les deux espèces, ainsi que les températures automnales élevées dans le cas de la pruche du Canada. Des corrélations négatives ont été observées avec les températures estivales de l'année précédente (pruche du Canada) et de l'année en cours (pin blanc). La disponibilité d'humidité au printemps et à l'été était positivement corrélée avec la croissance du pin blanc tout au long de sa chronologie, tandis que dans le cas de la pruche du Canada les corrélations avec l'humidité allaient avec le temps de significatives avec la croissance de l'année en cours à celle de l'année précédente. La croissance de ces conifères de la zone tempérée pourrait bénéficier de températures plus chaudes au printemps (les deux espèces) et à l'automne (pruche du Canada), bien que cela puisse être compensé par des réductions de croissance associées à des étés plus chauds et plus secs. [Traduit par la Rédaction] [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Canadian Journal of Forest Research is the property of Canadian Science Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Abstract:
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