Drought impact on forest regeneration in the Southeast USA
文献类型：期刊论文
| 作者 | Hu, Huifeng; Wang, G. Geoff; Bauerle, William L.; Klos, Ryan J. |
| 刊名 | ECOSPHERE
 |
| 出版日期 | 2017 |
| 卷号 | 8期号:4 |
| 关键词 | drought Forest Health and Monitoring Forest Inventory and Analysis growth mortality Palmer Drought Severity Index (PDSI) recruitment sapling |
| ISSN号 | 2150-8925 |
| DOI | 10.11646/phytotaxa.329.2.14 |
| 文献子类 | Article |
| 英文摘要 | Elevating concentrations of atmospheric greenhouse gases are now widely acknowledged as a major cause of global warming. A warmer climate could increase the frequency, duration, and/or severity of drought and, in turn, could alter the composition, structure, and biogeography of forests in many regions. To explore the regional effects of different drought severities on forest regeneration, we investigated changes in sapling growth and density across the southeastern United States under various drought and stand conditions using 1991-2005 Forest Health and Monitoring plot data from Alabama, Georgia, and Virginia. Drought effects were examined on three species groups (pine, oak + hickory, and mesophytic species) using the Palmer Drought Severity Index. Stand and site variables, including total basal area, total stand density, tree species richness, slope, and stand age, were used to account for drought effects under varying stand conditions. The oak + hickory and mesophytic species groups exhibited significant reductions in annual growth rate with increasing drought severity. However, no significant difference in annual growth rate was observed within the pine species group. Chi-square analysis showed that annual mortality rate was significantly dependent on drought severity for each species group but annual recruitment rate was only significantly dependent on drought severity for the oak + hickory group. Total basal area, tree species richness, and stand age had a negative effect on growth in one or more species groups. The observed differential dynamics of sapling growth, mortality, and recruitment among species groups may alter the trend of forest regeneration in southeastern U.S. forests because of the predicted increases in intensity and frequency of droughts in the future. The significant effects of stand conditions on drought responses observed in our study also suggest that appropriate forest management strategies may be useful to maintain structure features of understory saplings for southeastern U.S. forests. |
| 学科主题 | Plant Sciences |
| 出版地 | HOBOKEN |
| WOS关键词 | FAGUS-SYLVATICA L. ; TREE MORTALITY ; CLIMATE-CHANGE ; SCOTS PINE ; GROWTH ; RESPONSES ; SEEDLINGS ; TOLERANCE ; STAND ; LEAF |
| 语种 | 英语 |
| WOS记录号 | WOS:000416928900014 |
| 出版者 | WILEY |
| 资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31470498] ; Chinese National Basic Research ProgramNational Basic Research Program of China [2014CB954303, 2015CB954201] ; United States Department of Agriculture (USDA) Forest Service under the Forest Health Monitoring Analysis and Reporting program |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/22330]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Hu, Huifeng; Wang, G. Geoff; Klos, Ryan J.] Clemson Univ, Dept Forestry & Environm Conservat, Clemson, SC 29634 USA 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.Bauerle, William L.] Colorado State Univ, Dept Hort & Landscape Architecture, Ft Collins, CO 80523 USA |
| 推荐引用方式 GB/T 7714 | Hu, Huifeng,Wang, G. Geoff,Bauerle, William L.,et al. Drought impact on forest regeneration in the Southeast USA[J]. ECOSPHERE,2017,8(4). |
| APA | Hu, Huifeng,Wang, G. Geoff,Bauerle, William L.,&Klos, Ryan J..(2017).Drought impact on forest regeneration in the Southeast USA.ECOSPHERE,8(4). |
| MLA | Hu, Huifeng,et al."Drought impact on forest regeneration in the Southeast USA".ECOSPHERE 8.4(2017). |
入库方式： OAI收割
来源：植物研究所
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