Overlapping outbreaks of multiple bark beetle species are rarely more severe than single‐species outbreaks
Overlapping outbreaks of multiple bark beetle species are rarely more severe than single‐species outbreaks
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多种树皮甲虫物种的重叠爆发很少比单一物种的爆发更严重
DOI：
10.1002/ecs2.4478
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发表时间：
2023
期刊：
影响因子：
2.7
通讯作者：
Hart, Sarah J.
中科院分区：
文献类型：
--
作者：
Tutland, Niko J.;Rodman, Kyle C.;Andrus, Robert A.;Hart, Sarah J.
空间和时间上重叠的生物干扰可能会导致森林结构和组成发生重大变化，从而对许多生态系统服务产生潜在影响。从 20 世纪 90 年代末开始，多种树皮甲虫物种的爆发导致了大约 3 种同时存在的针叶树物种的广泛死亡。美国落基山脉南部 40,000 平方公里的亚高山地区 (SRM)。为了更好地了解此类爆发的影响，我们的目标是确定多个树皮甲虫物种的重叠爆发是否比具有多个易感宿主树种的单物种爆发导致更高的树木死亡率。我们通过在随机森林建模框架中结合航空调查数据和森林组成变量，绘制了云杉甲虫（SB，Dendroctonus rufipennis）、山松甲虫（MPB，Dendroctonus ponderosae）和西部香脂树皮甲虫（WBBB，Dryocoetes confusus）爆发的易感性图。然后，我们使用现有的树皮甲虫累积森林死亡率地图来调查 1999 年至 2019 年重叠爆发的范围和严重性。我们发现，在所研究的三种寄主物种——英格曼云杉 (Picea engelmannii)、黑松 (Pinus contortavar.latifolia) 或亚高山冷杉 (Abies lasiocarpa) 中，有 46% 的林分中存在两种或两种以上，容易受到树皮甲虫的影响。重叠爆发（占所有采样林分的 25%）。在这些林分中，31% 的林分经历了两种或两种以上甲虫物种的爆发。受 MPB 和 SB 爆发影响的林分的树木死亡率高于仅受一种物种影响的林分，但同时受 MPB 和 SB 影响的林分并不常见（<4% 的采样林分）。没有其他甲虫爆发组合使树木死亡率高于单一物种爆发造成的水平。因此，与预期相反，SRM 中重叠爆发很少比单一物种爆发更严重。这表明，即使在温暖、干燥的条件下，不同的森林群落也可以缓冲树皮甲虫爆发的最严重影响。
Biotic disturbances that overlap in space and time may result in important shifts in forest structure and composition, with potential effects on many ecosystem services. Starting in the late 1990s, outbreaks of multiple bark beetle species caused widespread mortality of three co‐occurring conifer species in the ca. 40,000‐km2subalpine zone of the southern Rocky Mountains (SRM), USA. To better understand the implications of such outbreaks, our goal was to determine if overlapping outbreaks of multiple bark beetle species caused greater tree mortality than single‐species outbreaks in stands with multiple susceptible host tree species. We mapped stand susceptibility to outbreaks of spruce beetle (SB,Dendroctonus rufipennis), mountain pine beetle (MPB,Dendroctonus ponderosae), and western balsam bark beetle (WBBB,Dryocoetes confusus) by combining aerial survey data and forest composition variables in a random forest modeling framework. Then, we used existing maps of cumulative forest mortality from bark beetles to investigate the extent and severity of overlapping outbreaks from 1999 to 2019. We found that 46% of stands with two or more of the three studied hosts species—Engelmann spruce (Picea engelmannii), lodgepole pine (Pinus contortavar.latifolia), or subalpine fir (Abies lasiocarpa)—were susceptible to overlapping outbreaks (25% of all sampled stands). Of those stands, 31% experienced outbreaks of two or more beetle species. Stands affected by outbreaks of both MPB and SB had higher tree mortality than stands affected by one species alone, though stands susceptible to both MPB and SB were uncommon (<4% of all sampled stands). No other combinations of beetle outbreaks increased tree mortality above levels caused by single‐species outbreaks. Thus, contrary to expectations, overlapping outbreaks were rarely more severe than single‐species outbreaks in the SRM. This suggests that diverse forest communities may buffer against the most severe effects of bark beetle outbreaks, even during warm, dry conditions.
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影响因子：
16.6
作者：
Sommerfeld A;Senf C;Buma B;D'Amato AW;Després T;Díaz-Hormazábal I;Fraver S;Frelich LE;Gutiérrez ÁG;Hart SJ;Harvey BJ;He HS;Hlásny T;Holz A;Kitzberger T;Kulakowski D;Lindenmayer D;Mori AS;Müller J;Paritsis J;Perry GLW;Stephens SL;Svoboda M;Turner MG;Veblen TT;Seidl R
通讯作者：
Seidl R
哺乳动物对落基山脉南部树皮甲虫爆发导致的森林条件变化的反应
影响因子：
2.7
作者：
Jacob S. Ivan;A. Seglund;Richard L. Truex;Eric S. Newkirk
通讯作者：
Eric S. Newkirk
影响因子：
3.7
作者：
Coleman, Tom W.;Graves, Andrew D.;Ryerson, Daniel
通讯作者：
Ryerson, Daniel
对西部香脂树皮甲虫活动的景观预测表明，不列颠哥伦比亚省大范围的洪水泛滥导致气温升高、生长季节延长和干旱
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
J. Mcmillin;K. Allen;Daniel F. Long;Jeri Lyn Harris;J. Negrón
通讯作者：
J. Negrón