Do forest health threats affect upland oak regeneration and recruitment?Advance reproduction is a key co-morbidity  

作　　者：Lance A.Vickers Benjamin O.Knapp Daniel C.Dey Lauren S.Pile Knapp 

机构地区：[1]School of Natural Resources,University of Missouri,203 Anheuser-Busch Natural Resources Building,Columbia,MO,65211,USA [2]USDA Forest Service Northern Research Station,202 Anheuser-Busch Natural Resources Building,Columbia,MO,65211,USA

出　　处：《Forest Ecosystems》2023年第6期743-751,共9页森林生态系统（英文版）

基　　金：This project falls under Task Agreement 18-JV-11242311-084 with the USDA Forest Service;Northern Research Station,within master joint venture agreement 18-JV-11242311-093 under the Great Rivers Cooperative Ecosystems Studies Unit.

摘　　要：We analyzed national forest inventory data collected from circa 2000–2018 across 37 states in the eastern United States to better understand the influence of forest health related canopy disturbances on the regeneration and recruitment dynamics of upland oaks(Quercus).We found low levels of oak recruitment across all disturbance types examined but limited evidence of any direct effects from the type of disturbance on the population of regenerating oaks.The general lack of differences in oak regeneration response between forest health disturbances and disturbances caused by harvested or non-disturbed plots does not indicate that the effects of forest health disturbances were benign,however.Instead,low level of oak recruitment across all disturbance types highlights the pervasiveness of the trend of shifting composition in once oak-dominated forests where oak is absent or sparse in the regeneration layer.Our results show that oak recruitment was higher when oak was present as advance reproduction prior to disturbance from any cause examined.Collectively,these results lead us to conclude that the widespread inadequacy of oak advance reproduction in mature oak-dominated forests is the prevailing threat to oak forest health and sustainability.We suggest the status of advance reproduction be treated as a co-morbidity when weighing the risk and potential outcomes from other threats to upland oak forests in the eastern United States.

关 键 词：Temperate deciduous forest Regeneration ecology Forest inventory and analysis Oak/hickory Forest pests INSECT Disease Harvesting 

分 类 号：S718.5[农业科学—林学]