Relative influence of stand and site factors on aboveground live-tree carbon sequestration and mortality in managed and unmanaged forests

FOREST ECOLOGY AND MANAGEMENT

卷:493

Article

Kern, Christel C.¹  Kenefic, Laura S.²  Kuehne, Christian^3,4  Weiskittel, Aaron R.³  Kaschmitter, Sarah J.⁵  D'Amato, Anthony W.⁶  Dey, Daniel C.⁷  Kabrick, John M.⁷  Palik, Brian J.⁸  Schuler, Thomas M.⁹ 

[1] US Forest Serv, USDA, Northern Res Stn, 5985 Highway K, Rhinelander, WI 54501 USA

[2] US Forest Serv, USDA, Northern Res Stn, 54 Govt Rd, Bradley, ME 04411 USA

[3] Univ Maine, Ctr Res Sustainable Forests, 5755 Nutting Hall, Orono, ME 04469 USA

[4] Norwegian Inst Bioecon Res, Div Forestry & Forest Resources, POB 115, NO-1431 As, Norway

[5] US Forest Serv, USDA, Ochoco Natl Forest, 3160 NE 3rd St, Prineville, OR 97754 USA

[6] Univ Vermont, Rubenstein Sch Environm & Nat Resources, Burlington, VT 05405 USA

[7] Univ Missouri, US Forest Serv, USDA, Northern Res Stn, 202 ABNR Bldg, Columbia, MO 65211 USA

[8] US Forest Serv, USDA, Northern Res Stn, 1861 Highway 169 East, Grand Rapids, MN 55744 USA

[9] US Forest Serv, USDA, Res & Dev, 201 14th St, Washington, DC 20250 USA

关键词: Research networks;    Experimental forests;    Climate factors;    Silviculture;    Aboveground carbon sequestration;    Carbon loss;   

DOI  :  10.1016/j.foreco.2021.119266

来源: Elsevier

【 摘 要 】

We compiled data from several independent, long-term silvicultural studies on USDA Forest Service experimental forests across a latitudinal gradient in the northeastern and north-central U.S.A. to evaluate factors influencing aboveground live-tree carbon sequestration and mortality. Data represent five sites with more than 70,000 repeated tree records spanning eight decades, five ecoregions, and a range of stand conditions. We used these data to test the relative influence of factors such as climate, treatment history (uneven-aged or no management), species composition, and stand structural conditions on aboveground live-tree carbon sequestration and mortality in repeatedly measured trees. Relative to no management, we found that uneven-aged management tended to have a positive effect on carbon sequestration at low stocking levels and in areas of favorable climate (expressed as a combination of growing season precipitation and annual growing degree days > 5 degrees C). In addition, losses of carbon from the aboveground live-tree pool due to tree mortality were lower in managed than unmanaged stands. These findings suggest that there may be conditions at which rate of sequestration in living trees is higher in stands managed with uneven-aged silviculture than in unmanaged stands, and that this benefit is greatest where climate is favorable.

【 授权许可】

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