期刊
NATURE PLANTS
卷 1, 期 3, 页码 -出版社
NATURE RESEARCH
DOI: 10.1038/NPLANTS.2015.16
关键词
-
资金
- Office of Science (BER), US Department of Energy [DE-FG02-95ER62125, DE-AC02-98CH10886]
- US Forest Service Northern Global Change Program
- North Central Research Station
- Michigan Technological University
- Natural Resources Canada - Canadian Forest Service
- Office of Science (BER), U.S. Department of Energy [DE-FG02-06ER64232]
- University of Wisconsin Hatch [WIS04898]
- USDA NIFA AFRI Fellowship [2012-67012-19900]
Stimulation of forest productivity by elevated concentrations of CO2 is expected to partially offset continued increases in anthropogenic CO2 emissions. However, multiple factors can impair the capacity of forests to act as carbon sinks; prominent among these are tropospheric O-3 and nutrient limitations(1,2). Herbivorous insects also influence carbon and nutrient dynamics in forest ecosystems, yet are often ignored in ecosystem models of forest productivity. Here we assess the effects of elevated levels of CO2 and O-3 on insect-mediated canopy damage and organic matter deposition in aspen and birch stands at the Aspen FACE facility in northern Wisconsin, United States. Canopy damage was markedly higher in the elevated CO2 stands, as was the deposition of organic substrates and nitrogen. The opposite trends were apparent in the elevated O-3 stands. Using a light-use efficiency model, we show that the negative impacts of herbivorous insects on net primary production more than doubled under elevated concentrations of CO2, but decreased under elevated concentrations of O-3. We conclude that herbivorous insects may limit the capacity of forests to function as sinks for anthropogenic carbon emissions in a high CO2 world.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据