Tree regeneration and future stand development after bark beetle infestation and harvesting in Colorado lodgepole pine stands

Collins, Beverly; Rhoades, Charles C.; Hubbard, Robert M.; Battaglia, Michael A.

doi:10.1016/j.foreco.2011.03.016

Cited by 127 publications

(145 citation statements)

References 25 publications

(36 reference statements)

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“…Geographical expansion of the MPB has been limited in the past by climate (Carroll et al, 2003). Several studies have attempted to model the future impacts and timing of the expansion of the MPB based on climate change effects and changing pine stand characteristics (e.g.…”

Section: A R Berg Et Al: the Impact Of Bark Beetle Infestations Onmentioning

confidence: 99%

“…Although postdisturbance vegetation dynamics are not fully understood, Collins et al (2011) find that in remote forest in Colorado, lodgepole pine stands can be replaced with deciduous trees such as aspen, which emit mainly isoprene. However, in other areas, coniferous trees such as subalpine fir or Engelmann spruce may initially replace lodgepole pine (Collins et al, 2011). Any transformation of vegetation will cause a change in the amounts and types of VOCs emitted, as well as subsequent SOA loadings in the region.…”

Section: Uncertaintiesmentioning

confidence: 99%

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The impact of bark beetle infestations on monoterpene emissions and secondary organic aerosol formation in western North America

et al. 2013

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Over the last decade, extensive beetle outbreaks in western North America have destroyed over 100 000 km² of forest throughout British Columbia and the western United States. Beetle infestations impact monoterpene emissions through both decreased emissions as trees are killed (mortality effect) and increased emissions in trees under attack (attack effect). We use 14 yr of beetle-induced tree mortality data together with beetle-induced monoterpene emission data in the National Center for Atmospheric Research (NCAR) Community Earth System Model (CESM) to investigate the impact of beetle-induced tree mortality and attack on monoterpene emissions and secondary organic aerosol (SOA) formation in western North America.

Regionally, beetle infestations may have a significant impact on monoterpene emissions and SOA concentrations, with up to a 4-fold increase in monoterpene emissions and up to a 40% increase in SOA concentrations in some years (in a scenario where the attack effect is based on observed lodgepole pine response). Responses to beetle attack depend on the extent of previous mortality and the number of trees under attack in a given year, which can vary greatly over space and time. Simulated enhancements peak in 2004 (British Columbia) and 2008 (US). Responses to beetle attack are shown to be substantially larger (up to a 3-fold localized increase in summertime SOA concentrations) in a scenario based on bark-beetle attack in spruce trees. Placed in the context of observations from the IMPROVE network, the changes in SOA concentrations due to beetle attack are in most cases small compared to the large annual and interannual variability in total organic aerosol which is driven by wildfire activity in western North America. This indicates that most beetle-induced SOA changes are not likely detectable in current observation networks; however, these changes may impede efforts to achieve natural visibility conditions in the national parks and wilderness areas of the western United States

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Section: A R Berg Et Al: the Impact Of Bark Beetle Infestations Onmentioning

confidence: 99%

Section: Uncertaintiesmentioning

confidence: 99%

The impact of bark beetle infestations on monoterpene emissions and secondary organic aerosol formation in western North America

et al. 2013

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“…The fused product also demonstrates the progressive increase in urbanization and agricultural land use that the region has undergone in the last three decades [80][81][82][83][84]. Furthermore, SCaMF-RM depicts strong oscillations in forest coverage during the last two decades, which could be associated with disturbances, such as bark beetle infestations and fires, and with areas where vegetation re-growth has followed abrupt and gradual progressions [85][86][87][88][89][90][91]. For example, Figure 12 depicts LC changes associated with eight wildfires that occurred in the region of interest and ignited between 2000 and 2012.…”

Section: Resultsmentioning

confidence: 91%

“…These vegetation transitions are compared to an independent estimation of the burned areas from the Monitoring Trends and Burn Severity (MTBS) project [92,93]. and gradual progressions [85][86][87][88][89][90][91]. For example, Figure 12 depicts LC changes associated with eight wildfires that occurred in the region of interest and ignited between 2000 and 2012.…”

Section: Resultsmentioning

confidence: 99%

SCaMF–RM: A Fused High-Resolution Land Cover Product of the Rocky Mountains

et al. 2017

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Land cover (LC) products, derived primarily from satellite spectral imagery, are essential inputs for environmental studies because LC is a critical driver of processes involved in hydrology, ecology, and climatology, among others. However, existing LC products each have different temporal and spatial resolutions and different LC classes that rarely provide the detail required by these studies. Using multiple existing LC products, we implement our Spatiotemporal Categorical Map Fusion (SCaMF) methodology over a large region of the Rocky Mountains (RM), encompassing sections of six states, to create a new LC product, SCaMF-RM. To do this, we must adapt SCaMF to address the prediction of LC in large space-time regions that present nonstationarities, and we add more flexibility in the LC classifications of the predicted product. SCaMF-RM is produced at two high spatial resolutions, 30 and 50 m, and a yearly frequency for the 30-year period 1983-2012. When multiple products are available in time, we illustrate how SCaMF-RM captures relevant information from the different LC products and improves upon flaws observed in other products. Future work needed includes an exhaustive validation not only of SCaMF-RM but also of all input LC products.

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“…MPB is endemic to North America; however, the recent outbreaks have reached epidemic levels that have affected millions of hectares of forests [3]. The effects of MPB infestation range from altered surface fuel and wildfire hazards [4][5][6][7], changed vegetative composition [8], converted live carbon sinks to dead and slowly decaying carbon sources [9][10][11], impacted nutrient cycling and water quality [12,13], shifted evapotranspiration and albedo, modified local surface energy balance [14] and changed regional climate [15]. Those effects are predicted to increase as a consequence of the direct and indirect effects of climatic changes [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Mapping Mountain Pine Beetle Mortality through Growth Trend Analysis of Time-Series Landsat Data

Chen

Hawbaker

et al. 2014

Remote Sensing

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Disturbances are key processes in the carbon cycle of forests and other ecosystems. In recent decades, mountain pine beetle (MPB; Dendroctonus ponderosae) outbreaks have become more frequent and extensive in western North America. Remote sensing has the ability to fill the data gaps of long-term infestation monitoring, but the elimination of observational noise and attributing changes quantitatively are two main challenges in its effective application. Here, we present a forest growth trend analysis method that integrates Landsat temporal trajectories and decision tree techniques to derive annual forest disturbance maps over an 11-year period. The temporal trajectory component successfully captures the disturbance events as represented by spectral segments, whereas decision tree modeling efficiently recognizes and attributes events based upon the characteristics of the segments. Validated against a point set sampled across a gradient of MPB mortality, 86.74% to 94.00% overall accuracy was achieved with small variability in accuracy among years. In contrast, the overall accuracies of single-date classifications ranged from 37.20% to 75.20% and only become comparable with our approach when the training sample size was increased at least four-fold. This demonstrates that the advantages of this time series work flow exist in its small training sample size requirement. The easily OPEN ACCESSRemote Sens. 2014, 6 5697 understandable, interpretable and modifiable characteristics of our approach suggest that it could be applicable to other ecoregions.

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Tree regeneration and future stand development after bark beetle infestation and harvesting in Colorado lodgepole pine stands

Cited by 127 publications

References 25 publications

The impact of bark beetle infestations on monoterpene emissions and secondary organic aerosol formation in western North America

The impact of bark beetle infestations on monoterpene emissions and secondary organic aerosol formation in western North America

SCaMF–RM: A Fused High-Resolution Land Cover Product of the Rocky Mountains

Mapping Mountain Pine Beetle Mortality through Growth Trend Analysis of Time-Series Landsat Data

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