Within-stand spatial distribution of ponderosa pine mortality caused by the mountain pine beetle in the Colorado Front Range

2020 ◽  
Author(s):  
Jose F. Negron
Keyword(s):  
Spatial Distribution ◽  
Ponderosa Pine ◽  
Mountain Pine Beetle ◽  
Colorado Front Range ◽  
Front Range ◽  
Mountain Pine ◽  
Pine Beetle

scholarly journals Fungal Frequency and Mite Load Trends Interact with a Declining Mountain Pine Beetle Population

Forests ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 484 ◽  
Author(s):  
Javier Mercado ◽  
Beatriz Ortiz-Santana ◽  
Shannon Kay
Keyword(s):  
Mountain Pine Beetle ◽  
Population Trends ◽  
Colorado Front Range ◽  
Front Range ◽  
Beetle Population ◽  
Biologically Relevant ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Blue Stain Fungi ◽  
Blue Stain

The mite and fungal biota associated with the mountain pine beetle (MPB) (Dendroctonus ponderosae Hopk.) may not be stable throughout an irruptive event. In congeneric beetles, variations in the frequency of their associated organisms affect population trends and similar effects may occur in MPB. We studied fungi and mite trends in a declining irruptive MPB population as it attacked three different pine hosts in the Colorado Front Range. During the study, we found two new associates including one biologically relevant mite and one beneficial blue-stain fungus. Fungi hyperphoretic on mites were also documented. This included beneficial and potentially detrimental species to the MPB. The frequency of several organisms varied between some years or pine hosts but not within male or female beetles. A large increase of Trichouropoda sp. and T. ips mites trended inversely with the declining beetle population, while a decrease in the beneficial blue-stain fungi trended similarly to the declining beetle population. We discuss the interactions and potential effects of phoretic biota in relation to (1) the MPB associates’ population trends, (2) the MPB incursions into cooler areas, and (3) the redundancy of blue-stain fungi carried by the MPB holobiont. These findings increase our knowledge of the mechanisms that influence MPB populations.

scholarly journals The Mountain Pine Beetle Epidemic in the Black Hills, South Dakota: The Consequences of Long Term Fire Policy, Climate Change and the Use of Remote Sensing to Enhance Mitigation

2018 ◽  
Vol 10 (1) ◽  
pp. 69 ◽  
Author(s):  
Kyle Mullen ◽  
Fei Yuan ◽  
Martin Mitchell
Keyword(s):  
Climate Change ◽  
Remote Sensing ◽  
Ponderosa Pine ◽  
Mountain Pine Beetle ◽  
Black Hills ◽  
Fire Policy ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Ponderosa Pine Forest

The recent and intense outbreak (first decade of 2000s) of the mountain pine beetle in the Black Hills of South Dakota and Wyoming, which impacted over 33% of the 1.2 million acre (486,000 ha) Black Hills National Forest, illustrates what can occur when forest management practices intersect with natural climatic oscillations and climate change to create the “perfect storm” in a region where the physical environment sets the stage for a plethora of economic activities ranging from extractive industries to tourism. This study evaluates the potential of WorldView-2 satellite imagery for green-attacked tree detection in the ponderosa pine forest of the Black Hills, USA. It also discusses the consequences of long term fire policy and climate change, and the use of remote sensing technology to enhance mitigation. It was found that the near-infrared one (band 7) of WorldView-2 imagery had the highest influence on the green-attack classification. The Random Forest classification produced the best results when transferred to the independent dataset, whereas the Logistic Regression models consistently yielded the highest accuracies when cross-validated with the training data. Lessons learned include: (1) utilizing recent advances in remote sensing technologies, most notably the use of WorldView-2 data, to assist in more effectively implementing mitigation measures during an epidemic, and (2) implementing pre-emptive thinning strategies; both of which can be applied elsewhere in the American West to more effectively blunt or preclude the consequences of a mountain pine beetle outbreak on an existing ponderosa pine forest. 

scholarly journals Ponderosa pine mortality resulting from a mountain pine beetle outbreak

1982 ◽  
Author(s):  
William F. McCambridge ◽  
Frank G. Hawksworth ◽  
Carleton B. Edminster ◽  
John G. Laut
Keyword(s):  
Ponderosa Pine ◽  
Mountain Pine Beetle ◽  
Mountain Pine ◽  
Pine Beetle

Understory biomass in ponderosa pine following mountain pine beetle infestation

1985 ◽  
Vol 13 (1-2) ◽  
pp. 53-67 ◽  
Author(s):  
David A. Kovacic ◽  
Melvin I. Dyer ◽  
Alexander T. Cringan
Keyword(s):  
Ponderosa Pine ◽  
Mountain Pine Beetle ◽  
Mountain Pine ◽  
Pine Beetle ◽  
Understory Biomass
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