气候变化领域集成服务门户(CCPortal): Quantitative and qualitative approaches to assess tree vigor and stand health in dry pine forests

CCPortal

DOI	10.1016/j.foreco.2020.118085
	Quantitative and qualitative approaches to assess tree vigor and stand health in dry pine forests
	Grulke N.; Bienz C.; Hrinkevich K.; Maxfield J.; Uyeda K.
发表日期	2020
ISSN	0378-1127
卷号	465
英文摘要	Despite a critical need to evaluate effectiveness of forest treatments in improving stand health, practitioners lack quantitative, repeatable metrics to assess tree vigor and stand health. We evaluated canopy and whole tree attributes of ponderosa pine (Pinus ponderosa Dougl. Ex Laws) related to carbon balance, water balance, and susceptibility to insects and pathogens in dry, pine-dominated forest stands during a multi-year drought, an environmental challenge to stand resilience. Metrics of trees in two unmanaged, and seven treated forested stands, in both uplands and lowlands to develop the quantitative approach. Whole tree and crown attributes including needle length and color, branchlet length and diameter, needle retention (needle ages and retention within ages), and frequency of insects, fungi, and abiotic needle damage were statistically selected to assess tree vigor. Cluster analysis of vigor attributes revealed that trees responded or persisted independently within a forest treatment; forest treatments did not necessarily yield similar tree responses within a stand. A rapid, qualitative assessment was developed to rank trees as low, average, and above-average vigor. To demonstrate an application of our approach, trees were ranked annually over six years in most stands, as well as in a stand where the prescription was adjusted due to the evaluation. The proportion of trees in the three tree vigor ranks differed, suggesting differing levels of stand health. Quantitative metrics and qualitative ranking of tree vigor could assist in selecting trees to be retained to meet specific management objectives, to evaluate treatment implementation, and to monitor post-treatment changes in stand health. © 2020
关键词	Cluster analysis Conservation Environmental regulations Health Monitoring Needles Petroleum reservoir evaluation Forest restoration Forest treatment Pine forest Ponderosa pines Stand management Tree vigor Forestry assessment method coniferous forest coniferous tree drought forest canopy forest ecosystem forest management insect pathogen qualitative analysis quantitative analysis stand structure tree Conservation Environmental Regulations Forestry Health Monitoring Needles Fungi Hexapoda Pinus ponderosa
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132841
推荐引用方式 GB/T 7714	Grulke N.,Bienz C.,Hrinkevich K.,et al. Quantitative and qualitative approaches to assess tree vigor and stand health in dry pine forests[J]. Forest Ecology and Management,2020,465.
APA	Grulke N.,Bienz C.,Hrinkevich K.,Maxfield J.,&Uyeda K..(2020).Quantitative and qualitative approaches to assess tree vigor and stand health in dry pine forests.,465.
MLA	Grulke N.,et al."Quantitative and qualitative approaches to assess tree vigor and stand health in dry pine forests".465(2020).