Forest recovery following extreme drought in California, USA: natural patterns and effects of pre‐drought management

断面积 重新造林 植被(病理学) 生态学 林业 航程(航空) 死亡率 森林经营 地理 农林复合经营 生物 环境科学 人口学 病理 社会学 复合材料 医学 材料科学
作者
Derek J. N. Young,Marc D. Meyer,Becky L. Estes,Shana Gross,Amarina Wuenschel,Christina Restaino,Hugh D. Safford
出处
期刊:Ecological Applications [Wiley]
卷期号:30 (1) 被引量:58
标识
DOI:10.1002/eap.2002
摘要

Abstract Rising temperatures and more frequent and severe droughts are driving increases in tree mortality in forests around the globe. However, in many cases, the likely trajectories of forest recovery following drought‐related mortality are poorly understood. In many fire‐suppressed western U.S. forests, management is applied to reverse densification and restore natural forest structure and species composition, but it is unclear how such management affects post‐mortality recovery. We addressed these uncertainties by examining forest stands that experienced mortality during the severe drought of 2012–2016 in California, USA . We surveyed post‐drought vegetation along a gradient of overstory mortality severity in paired treated (mechanically thinned or prescribed‐burned) and untreated areas in the Sierra Nevada. Treatment substantially reduced tree density, particularly in smaller tree size classes, and these effects persisted through severe drought‐related overstory mortality. However, even in treated areas with severe mortality (>67% basal area mortality), the combined density of residual (surviving) trees (mean 44 trees/ha) and saplings (mean 189 saplings/ha) frequently (86% of plots) fell within or exceeded the natural range of variation ( NRV ) of tree density, suggesting little need for reforestation intervention to increase density. Residual tree densities in untreated high‐mortality plots were significantly higher (mean 192 trees/ha and 506 saplings/ha), and 96% of these plots met or exceeded the NRV . Treatment disproportionately removed shade‐tolerant conifer species, while mortality in the drought event was concentrated in pines ( Pinus ponderosa and P. lambertiana ); as a consequence, the residual trees, saplings, and seedlings in treated areas, particularly those that had experienced moderate or high drought‐related mortality, were more heavily dominated by broadleaf (“hardwood”) trees (particularly Quercus kelloggii and Q. chrysolepis ). In contrast, residual trees and regeneration in untreated stands were heavily dominated by shade‐tolerant conifer species ( Abies concolor and Calocedrus decurrens ), suggesting a need for future treatment. Because increased dominance of hardwoods brings benefits for plant and animal diversity and stand resilience, the ecological advantages of mechanical thinning and prescribed fire treatments may, depending on the management perspective, extend even to stands that ultimately experience high drought‐related mortality following treatment.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
无奈世立发布了新的文献求助10
刚刚
zho应助Irene采纳,获得10
1秒前
领导范儿应助荣一采纳,获得10
1秒前
3秒前
陈宛婷完成签到,获得积分10
3秒前
3秒前
尤石马完成签到,获得积分10
3秒前
6秒前
尤石马发布了新的文献求助10
7秒前
8秒前
小狐狸发布了新的文献求助30
11秒前
croissante完成签到 ,获得积分10
12秒前
某某完成签到,获得积分10
12秒前
99giddens应助木筝丹青采纳,获得10
12秒前
科研通AI2S应助wsh采纳,获得10
14秒前
ding应助wsh采纳,获得10
14秒前
英俊的铭应助WQ采纳,获得10
14秒前
wanci应助归诚采纳,获得10
16秒前
追寻宛海发布了新的文献求助20
16秒前
落后妖妖完成签到 ,获得积分10
16秒前
16秒前
LL完成签到,获得积分10
17秒前
优秀剑愁完成签到 ,获得积分10
17秒前
20秒前
LL发布了新的文献求助10
20秒前
22秒前
23秒前
23秒前
24秒前
claud完成签到 ,获得积分10
25秒前
27秒前
Jasper应助张培培采纳,获得10
28秒前
niuniu发布了新的文献求助10
29秒前
隐形问萍发布了新的文献求助10
30秒前
蜜蜂威士忌完成签到 ,获得积分10
31秒前
荣一完成签到,获得积分10
31秒前
gaoyue发布了新的文献求助10
32秒前
32秒前
粗心的阿飞完成签到,获得积分10
35秒前
勤奋的刺猬完成签到,获得积分10
36秒前
高分求助中
Evolution 10000
ISSN 2159-8274 EISSN 2159-8290 1000
Becoming: An Introduction to Jung's Concept of Individuation 600
Heteroatom-Doped Carbon Allotropes: Progress in Synthesis, Characterization, and Applications 500
A new species of Coccus (Homoptera: Coccoidea) from Malawi 500
A new species of Velataspis (Hemiptera Coccoidea Diaspididae) from tea in Assam 500
PraxisRatgeber: Mantiden: Faszinierende Lauerjäger 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3159874
求助须知:如何正确求助?哪些是违规求助? 2810842
关于积分的说明 7889629
捐赠科研通 2469910
什么是DOI,文献DOI怎么找? 1315243
科研通“疑难数据库(出版商)”最低求助积分说明 630742
版权声明 602012