Academic Journal
Forest ecosystems, disturbance, and climatic change in Washington State
| العنوان: | Forest ecosystems, disturbance, and climatic change in Washington State |
|---|---|
| المؤلفون: | Jeremy S Littell, Elaine E Oneil, Donald Mckenzie, Jeffrey A Hicke, James A Lutz, Robert A Norheim, Marketa M Elsner |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://cses.washington.edu/cig/files/waccia/ch7forests.pdf. |
| سنة النشر: | 2009 |
| المجموعة: | CiteSeerX |
| الوصف: | Climatic change is likely to affect Pacific Northwest (PNW) forests in several important ways. In this paper, we address the role of climate in four forest ecosystem processes and project the effects of future climatic change on these processes. First, we analyze how climate affects Douglas-fir growth across the region to understand potential changes in future growth. In areas where Douglas-fir is not water-limited, future growth will continue to vary with interannual climate variability, but in places where Douglas-fir is water-limited, growth is likely to decline due to projected increase in summer potential evapotranspiration. Second, we use existing analyses of climatic controls on future potential tree species ranges to highlight areas where species turnover may be greatest. By the mid 21 st century, some areas of the interior Columbia Basin and eastern Cascades are likely to have climates poorly suited to pine species that are susceptible to mountain pine beetle, and if these pines are climatically stressed, they may be more vulnerable to pine beetle attack. Climatic suitability for Douglas-fir is also likely to change, with substantial decreases in climatically suitable area in the Puget Trough and the Okanogan Highlands. Third, using regression approaches, we examine the relationships between climate and the area burned by fire in the PNW and in eight Washington ecosystems and project future area burned in response to changing climate. Area burned is significantly related to both temperature and precipitation in summer, but more physiologically relevant variables, such as water balance deficit, perform as well or better in models. Regional area burned is likely to to vapor pressure deficit (VPD), and future projections support the hypothesis that summer VPD will increase over a significant portion of the range of host tree species. Due to the increased host vulnerability, MPB populations are expected to become more viable at higher elevations leading to increased incidence of MPB outbreaks The ... |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1068.7039; http://cses.washington.edu/cig/files/waccia/ch7forests.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1068.7039 http://cses.washington.edu/cig/files/waccia/ch7forests.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.CCFE646 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |