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Increasing radial growth in old-growth high-elevation conifers in Southern California, USA, during the exceptional "hot drought" of 2000-2020.
Knapp, Paul A; Soulé, Peter T; Mitchell, Tyler J; Catherwood, Avery A; Lewis, Hunter S.
Afiliación
  • Knapp PA; Carolina Tree-Ring Science Laboratory, Department of Geography, Environment and Sustainability, University of North Carolina Greensboro, Greensboro, NC, USA. paknapp@uncg.edu.
  • Soulé PT; Appalachian Tree Ring Lab, Department of Geography and Planning, Appalachian State University, Boone, NC, USA.
  • Mitchell TJ; Carolina Tree-Ring Science Laboratory, Department of Geography, Environment and Sustainability, University of North Carolina Greensboro, Greensboro, NC, USA.
  • Catherwood AA; Carolina Tree-Ring Science Laboratory, Department of Geography, Environment and Sustainability, University of North Carolina Greensboro, Greensboro, NC, USA.
  • Lewis HS; Carolina Tree-Ring Science Laboratory, Department of Geography, Environment and Sustainability, University of North Carolina Greensboro, Greensboro, NC, USA.
Int J Biometeorol ; 68(4): 743-748, 2024 Apr.
Article en En | MEDLINE | ID: mdl-38214750
ABSTRACT
Hot droughts, droughts attributed to below-average precipitation and exceptional warmth, are increasingly common in the twenty-first century, yet little is known about their effect on coniferous tree growth because of their historical rarity. In much of the American West, including California, radial tree growth is principally driven by precipitation, and narrow ring widths are typically associated with either drier or drought conditions. However, for species growing at high elevations (e.g., Larix lyalli, Pinus albicaulis), growth can be closely aligned with above-average temperatures with maximum growth coinciding with meteorological drought, suggesting that the growth effects of drought span from adverse to beneficial depending on location. Here, we compare radial growth responses of three high-elevation old-growth pines (Pinus jeffreyi, P. lambertiana, and P. contorta) growing in the San Jacinto Mountains, California, during a twenty-first-century hot drought (2000-2020) largely caused by exceptional warmth and a twentieth-century drought (1959-1966) principally driven by precipitation deficits. Mean radial growth during the hot drought was 12% above average while 18% below average during the mid-century drought illustrating that the consequences of environmental stress exhibit spatiotemporal variability. We conclude that the effects of hot droughts on tree growth in high-elevation forests may produce responses different than what is commonly associated with extended dry periods for much of western North America's forested lands at lower elevational ranges and likely applies to other mountainous regions (e.g., Mediterranean Europe) defined by summer-dry conditions. Thus, the climatological/biological interactions discovered in Southern California may offer clues to the unique nature of high-elevation forested ecosystems globally.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ecosistema / Pinus País/Región como asunto: America do norte Idioma: En Revista: Int J Biometeorol Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ecosistema / Pinus País/Región como asunto: America do norte Idioma: En Revista: Int J Biometeorol Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos