气候变化领域集成服务门户(CCPortal): Elevation-dependent patterns of borer-mediated snow-gum dieback are associated with subspecies' trait differences and environmental variation

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DOI	10.1111/aec.13508
	Elevation-dependent patterns of borer-mediated snow-gum dieback are associated with subspecies' trait differences and environmental variation
	Bryant, Callum; Ball, Marilyn C.; Borevitz, Justin; Brookhouse, Matthew T.; Carle, Hannah; Cunningham, Pia; Davey, Mei; Davies, James; Eason, Ashleigh; Erskine, Joseph D.; Fuenzalida, Tomas I.; Grishin, Dmitry; Harris, Rosalie; Kriticos, Jessica; Midson, Aaron; Nicotra, Adrienne B.; Nshuti, Annabelle; Ward-Jones, Jessica; Yau, Yolanda; Young, Olivia; Bothwell, Helen
发表日期	2024
ISSN	1442-9985
EISSN	1442-9993
起始页码	49
结束页码	3
卷号	49 期号:3
英文摘要	Subalpine forests worldwide face the synergistic threats of global warming and increased biotic attack, and the collapse or transition of subalpine forests is predicted in south-eastern Australia under future climates. The recent widespread dieback of subalpine snow-gum forests due to increased activity of a native wood-boring longicorn beetle, Phoracantha mastersii, suggests this process may already be underway. We investigated how variation in tree tissue traits and environmental conditions correlated with elevation-dependent spatial patterns of forest mortality. We hypothesized that increased vulnerability of subalpine snow gums to wood-borer-mediated dieback at intermediate elevations was associated with poorly resolved differences in traits between montane (Eucalyptus pauciflora subsp. pauciflora) and subalpine (E. pauciflora subsp. niphophila) snow-gum subspecies. We first sought to characterize variation and elevation-dependent transitions in 20 structural and drought-related functional traits among 120 healthy trees distributed along a 1000 m elevation transect that spanned the subspecies transition zone. Secondly, we surveyed 774 trees across 53 sites between 1280 and 1980 m a.s.l. to explore associations between borer-damage severity, elevation, subspecies and a subset of traits that differed between subspecies. We observed evidence for both continuous trait variation in response to changing elevation (10/20 traits) and discrete shifts in mean trait values across the transition between subspecies distributions (5/20 traits). Increased borer-damage severity across the montane-to-subalpine subspecies transition was correlated with lower bark thickness, whereas reduced borer damage at the highest elevations was associated with greater precipitation and lower temperatures. Our results suggest that due to possessing distinct traits associated with increased borer susceptibility, subalpine snow-gum forests may be subject to an increased risk of severe borer-mediated forest dieback under warmer and drier future climates. Identifying traits contributing to species' distribution limits and biotic-agent vulnerability remains critical for predicting, monitoring and possibly mitigating forest and vegetation declines under future climates. We hypothesized that increased vulnerability of subalpine snow gums to wood-borer-mediated dieback at intermediate elevations may be associated with poorly-resolved differences in traits between montane and subalpine snow-gum subspecies. We found that elevation-dependent patterns of wood-borer-mediated dieback were associated with differences in bark thickness between montane and subalpine snow-gum forests, as well as with elevation-associated variation in precipitation and temperature.image
英文关键词	bark thickness; climate change; forest dieback; tree mortality; Phoracantha mastersii
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:001186175700001
来源期刊	AUSTRAL ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305814
作者单位	Australian National University; Australian National University; University System of Georgia; University of Georgia
推荐引用方式 GB/T 7714	Bryant, Callum,Ball, Marilyn C.,Borevitz, Justin,et al. Elevation-dependent patterns of borer-mediated snow-gum dieback are associated with subspecies' trait differences and environmental variation[J],2024,49(3).
APA	Bryant, Callum.,Ball, Marilyn C..,Borevitz, Justin.,Brookhouse, Matthew T..,Carle, Hannah.,...&Bothwell, Helen.(2024).Elevation-dependent patterns of borer-mediated snow-gum dieback are associated with subspecies' trait differences and environmental variation.AUSTRAL ECOLOGY,49(3).
MLA	Bryant, Callum,et al."Elevation-dependent patterns of borer-mediated snow-gum dieback are associated with subspecies' trait differences and environmental variation".AUSTRAL ECOLOGY 49.3(2024).