检索结果-南通市图书馆

Tree mortality and biomass loss in drought-aff ected forests of east texas,USA

Journal of Forestry Research 2021年第1期32卷 67-80页

作者： Mukti Ram Subedi Weimin Xi Christopher B.Edgar Sandra Rideout-Hanzak Ming Yan Department of Biological and Health Sciences Texas A&M University-KingsvilleKingsvilleTX 78363USA Department of Forest Resources University of MinnesotaSt.PaulMN 55108USA Department of Rangeland and Wildlife Sciences and Caesar Kleberg Wildlife Research Institute Texas A&M University-KingsvilleKingsvilleTX 78363USA School of Life Sciences Shanxi Normal UniversityLinfen 041004People’s Republic of China

Changes in tree mortality due to severe drought can alter forest structure,composition,dynamics,ecosystem services,carbon fl uxes,and energy interactions between the atmosphere and land surfaces.We utilized long-term(2000‒2017,3 full inventory cycles)Forest Inventory and Analysis(FIA)data to examine tree mortality and biomass loss in drought-aff ected forests for east texas,USA.Plots that experienced six or more years of droughts during those censuses were selected based on 12-month moderate drought severity[Standardized Precipitation Evaporation Index(SPEI)-1.0].Plots that experienced other disturbances and inconsistent records were excluded from the analysis.In total,222 plots were retained from nearly 4000 plots.Generalized nonlinear mixed models(GNMMs)were used to examine the changes in tree mortality and recruitment rates for selected plots.The results showed that tree mortality rates and biomass loss to mortality increased overall,and across tree sizes,dominant genera,height classes,and ecoregions.An average mortality rate of 5.89%year−1 during the study period could be incited by water stress created by the regional prolonged and episodic drought events.The overall plot and species-group level recruitment rates decreased during the study period.Forest mortality showed mixed results regarding basal area and forest density using all plots together and when analyzed the plots by stand origin and ecoregion.Higher mortality rates of smaller trees were detected and were likely compounded by densitydependent factors.Comparative analysis of drought-induced tree mortality using hydro-meteorological data along with drought severity and length gradient is suggested to better understand the eff ects of drought on tree mortality and biomass loss around and beyond east texas in the southeastern United States.

关键词： Generalized nonlinear mixed model Endogenous factors Drought index Standardized precipitation evaporation index(SPEI) Above-ground biomass Competition index Biomass lost to mortality east texas

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

美国东得克萨斯(east texas)三个林型的大气养分输入

引用

热带林业科技 1985年第1期 48-52页

作者： CHARLES E.PEHL KURT F.RAY 刘有美美国佐治亚大学森林资源学院美国Clemson大学林学系

一、导言大气养分通过降水进入森林生态系统的为降雨中溶解离子和凝聚核子或灰尘中的干沉积物(Likens等,1977;Chadwick,1978;McColl和Bush,1978;Zinke,1980).同森林植被相互作用的穿透水和总降水,通过从植物表面淋洗的沉积物质和从植物... 详细信息

一、导言大气养分通过降水进入森林生态系统的为降雨中溶解离子和凝聚核子或灰尘中的干沉积物(Likens等,1977;Chadwick,1978;McColl和Bush,1978;Zinke,1980).同森林植被相互作用的穿透水和总降水,通过从植物表面淋洗的沉积物质和从植物组织淋溶的养分所富集(Switzer和Nelson,1972;Rolfe等,1978;Zinke,1980)。经过

关键词：养分输入 east texas 茎流量林型森林类型养分含量养分分析美国美利坚合众国北美洲

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：