globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2016.07.017
Scopus记录号: 2-s2.0-84979868430
论文题名:
Multi-scale reference conditions in an interior pine-dominated landscape in northeastern California
作者: Ritchie M.W.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2016
卷: 378
起始页码: 233
结束页码: 243
语种: 英语
英文关键词: Biomass ; Crown area ; Ponderosa pine ; Stand density
Scopus关键词: Biomass ; Surveys ; Breast height ; Crown area ; Forested area ; Ponderosa pines ; Reference condition ; Slope positions ; Species distributions ; Stand densities ; Forestry ; basal area ; biomass ; canopy architecture ; census ; coniferous tree ; forest management ; landscape ecology ; population density ; population distribution ; slope angle ; stand structure ; vigor ; California ; United States
英文摘要: A plot-based census was conducted of trees >8.9 cm in breast height diameter in a 4000 ha forest in northeastern California in 1933 and 1934, prior to any harvest activity. The trees were tallied by size class and species on contiguous plots specified to be 1.01 ha in size, although some plots had a forested area less than this specification due to natural openings in the forest. In general, variability in all metrics declined as scale increased across a range from 1 ha to 244 ha, although much of this variability was in the tails; the inner quartile range appeared to be more stable, particularly so for crown area. Although metrics were derived at a smaller scale (<1 ha) from partial plots, these may be unreliable due to the study design and possible confounding factors. The landscape distribution of tree sizes was bimodal and skew positive with a maximum tree size of 189.2 cm. However locally the distribution of tree sizes was more ragged and variable in shape. Species distribution appears to have shifted in a direction away from pine dominance in the years since the census was conducted. Historically, these stands were approximately 86 percent pine by basal area, with some variation depending on slope position. The stem density was dominated by young, thrifty-mature trees of good or moderate vigor but basal area and crown area was dominated by mature or over-mature trees with moderate or poor vigor. Crown area tended to be low with 90 percent of observations between 13 and 35 percent at the 1 ha scale. © 2016
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64752
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: US Forest Service Pacific Southwest Research Station, 3644 Avtech Parkway, Redding, CA, United States

Recommended Citation:
Ritchie M.W.. Multi-scale reference conditions in an interior pine-dominated landscape in northeastern California[J]. Forest Ecology and Management,2016-01-01,378
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Ritchie M.W.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Ritchie M.W.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Ritchie M.W.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.