scholarly journals Climate Risk Modelling of Balsam Woolly Adelgid Damage Severity in Subalpine Fir Stands of Western North America

PLoS ONE ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. e0165094 ◽  
Author(s):  
Kathryn H. Hrinkevich ◽  
Robert A. Progar ◽  
David C. Shaw
Keyword(s):  
North America ◽  
Climate Risk ◽  
Western North America ◽  
Risk Modelling ◽  
Subalpine Fir ◽  
Balsam Woolly Adelgid

scholarly journals Distribution of the Balsam Woolly Adelgid in Idaho

2000 ◽  
Vol 15 (4) ◽  
pp. 227-231 ◽  
Author(s):  
R.L. Livingston ◽  
J.E. Dewey ◽  
D.P. Beckman ◽  
L.E. Stipe
Keyword(s):  
North America ◽  
High Elevation ◽  
The State ◽  
Abies Lasiocarpa ◽  
Subalpine Fir ◽  
Northeastern North America ◽  
Aerial Surveys ◽  
Host Type ◽  
Ecological Values ◽  
Balsam Woolly Adelgid

Abstract The balsam woolly adelgid (Adelges piceae) was introduced from Europe to northeastern North America in about 1900. In 1983, it was discovered infesting fir trees in Idaho. Since then, aerial and ground surveys have documented its spread in Idaho over an area of approximately 14,000 mi2 (8,960,000 ac). It now covers most of the central one-third of the state. Aerial surveys in 1997 and 1998 identified about 125,000 ac of host type with dead or damaged trees. Subalpine fir (Abies lasiocarpa) is a critical species in many high elevation areas. The effects of the balsam wooly adelgid on aesthetics, hydrology, and other ecological values can be very important. The adelgid is likely to continue its spread throughout subalpine fir forests of Idaho and neighboring states. West. J. Appl. For. 15(4):227-231,

scholarly journals Stable or seral? Fire-driven alternative states in aspen forests of western North America

2019 ◽  
Vol 15 (6) ◽  
pp. 20190011 ◽  
Author(s):  
Jesse L. Morris ◽  
R. Justin DeRose ◽  
Thomas Brussel ◽  
Simon Brewer ◽  
Andrea Brunelle ◽  
...  
Keyword(s):  
North America ◽  
Fire History ◽  
Biological Diversity ◽  
Disturbance Ecology ◽  
Western North America ◽  
Alternative States ◽  
Sediment Record ◽  
Subalpine Fir ◽  
Critical Transitions

As important centres for biological diversity, aspen forests are essential to the function and aesthetics of montane ecosystems in western North America. Aspen stands are maintained by a nuanced relationship with wildfire, although in recent decades aspen mortality has increased. The need to understand the baseline environmental conditions that favour aspen is clear; however, long-term fire history reconstructions are rare due to the scarcity of natural archives in dry montane settings. Here, we analyse a high-resolution lake sediment record from southwestern, Utah, USA to quantify the compositional and burning conditions that promote stable (or seral) aspen forests. Our results show that aspen presence is negatively correlated with subalpine fir and that severe fires tend to promote persistent and diverse aspen ecosystems over centennial timescales. This information improves our understanding of aspen disturbance ecology and identifies the circumstances where critical transitions in montane forests may occur.

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