globalchange  > 气候减缓与适应
DOI: 10.3390/f10010035
WOS记录号: WOS:000458910800035
论文题名:
Whitebark and Foxtail Pine in Yosemite, Sequoia, and Kings Canyon National Parks: Initial Assessment of Stand Structure and Condition
作者: Nesmith, Jonathan C. B.1; Wright, Micah2; Jules, Erik S.2; McKinney, Shawn T.3
通讯作者: Nesmith, Jonathan C. B.
刊名: FORESTS
ISSN: 1999-4907
出版年: 2019
卷: 10, 期:1
语种: 英语
英文关键词: Cronartium ribicola ; Dendroctonus ponderosae ; five-needle pine ; foxtail pine ; mountain pine beetle ; Pinus albicaulis ; Pinus balfouriana ; white pine blister rust ; whitebark pine
WOS关键词: TREE MORTALITY ; SIERRA-NEVADA ; BLISTER RUST ; DISTURBANCES ; BALFOURIANA ; CALIFORNIA ; DROUGHT ; BEETLE ; CONSEQUENCES ; ALBICAULIS
WOS学科分类: Forestry
WOS研究方向: Forestry
英文摘要:

The Inventory & Monitoring Division of the U.S. National Park Service conducts long-term monitoring to provide park managers information on the status and trends in biological and environmental attributes including white pines. White pines are foundational species in many subalpine ecosystems and are currently experiencing population declines. Here we present results on the status of whitebark and foxtail pine in the southern Sierra Nevada of California, an area understudied relative to other parts of their ranges. We selected random plot locations in Yosemite, Sequoia, and Kings Canyon national parks using an equal probability spatially-balanced approach. Tree- and plot-level data were collected on forest structure, composition, demography, cone production, crown mortality, and incidence of white pine blister rust and mountain pine beetle. We measured 7899 whitebark pine, 1112 foxtail pine, and 6085 other trees from 2012-2017. All factors for both species were spatially highly variable. Whitebark pine occurred in nearly-pure krummholz stands at or near treeline and as a minor component of mixed species forests. Ovulate cones were observed on 25% of whitebark pine and 69% of foxtail pine. Whitebark pine seedlings were recorded in 58% of plots, and foxtail pine seedlings in only 21% of plots. Crown mortality (8% in whitebark, 6% in foxtail) was low and significantly higher in 2017 compared to previous years. Less than 1% of whitebark and zero foxtail pine were infected with white pine blister rust and <1% of whitebark and foxtail pine displayed symptoms of mountain pine beetle attack. High elevation white pines in the southern Sierra Nevada are healthy compared to other portions of their range where population declines are significant and well documented. However, increasing white pine blister rust and mountain pine beetle occurrence, coupled with climate change projections, portend future declines for these species, underscoring the need for broad-scale collaborative monitoring.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/126845
Appears in Collections:气候减缓与适应

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作者单位: 1.Natl Pk Serv, Inventory & Monitoring Div, Sierra Nevada Network, 47050 Generals Highway, Three Rivers, CA 93271 USA
2.Humboldt State Univ, Dept Biol Sci, 1 Harpst St, Arcata, CA 95521 USA
3.Rocky Mt Res Stn, Fire Sci Lab, Missoula, MT 59808 USA

Recommended Citation:
Nesmith, Jonathan C. B.,Wright, Micah,Jules, Erik S.,et al. Whitebark and Foxtail Pine in Yosemite, Sequoia, and Kings Canyon National Parks: Initial Assessment of Stand Structure and Condition[J]. FORESTS,2019-01-01,10(1)
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