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Jose Negron

Jose Negron
Research Entomologist
Forest and Woodland Ecosystems
240 West Prospect
Fort Collins, CO 80525
United States
Current Research
Jose’s current research includes reconstructing historical mountain pine beetle outbreaks in the Colorado Front Range. He is also developing field-based developmental models for mountain pine beetle and the Douglas-fir beetle. These will be used to develop predictive models and examining changes in population dynamics under climate change scenarios. Other studies include biological aspects of mountain pine beetle in Colorado, which has been very little studied, such as the role of parent adults in population biology, flight under different stand conditions, phloem consumption, and quantification of brood production from trees growing under different densities. His studies also address the ecology of endemic populations.
Past Research

There is abundant literature on many aspects of the biology and ecology of the major bark beetles, such as mountain pine beetle and Douglas-fir beetle in the Intermountain West. Very little known about these insects in the Colorado Front Range. Past research has focused on the development of simple models to estimate the probability of infestation and extent of mortality caused by bark beetles. Target species include mountain pine beetle, Douglas-fir beetle, pinyon ips beetles, and the roundheaded pine beetle in Colorado, New Mexico, Arizona, and the Black Hills. Other work addressed little know aspects on the biology of the western balsam bark beetle, and the flight periodicity and sampling of populations of Douglas-fir beetle. Fire and insect interactions are also part of Jose’s research portfolio.

Research Interest

Future direction of Jose’s work is the biology, ecology, and management of western bark beetles under climate change, how past disturbances shape our forests, and how to incorporate research findings into forest management strategies.

Why This Research Is Important

Bark beetles are integral components of the ecology of western forests. Insect-caused mortality often comes in conflict with land manager objectives and impact other ecosystem services. Bark beetles, particularly the mountain pine beetle, have been the subject of research for decades. Still large gaps exist in our knowledge on how these insects operate and shape our forests and how to use the information in forest management. Climate change is challenging knowledge from the past as insects are responding to climate change by expanding distributions, exhibiting different overwintering ecology, and influencing developmental patterns to name a few. In order to better manage disturbances as climate change continues to manifest, our knowledge has to be updated to offer proper management responses.

  • University of Puerto Rico, B.S., Biology, 1982
  • Louisiana State University, Baton Rouge, M.S., Entomology, 1985
  • Louisiana State University, Baton Rouge, Ph.D., Entomology, 1988
Professional Experience
  • Research Entomologist,  USDA Forest Service, Rocky Mountain Research Station,  1993 - Current
  • Entomologist,  USDA Forest Service, Forest Health Protection,  1988 - 1993
  • Professor in Entomology,  University of Puerto Rico,  1990 - 1991
  • Graduate student and research assistant,  Louisiana State University,  1983 - 1988
Featured Publications
Other Publications
Research Highlights

Insects Associated with Fire-injured Ponderosa Pine

Year: 2016
Forest Service scientists examined various aspects of the interaction between fire injury and subsequent insect infestations. Different types of fire injury and tree characteristics, such as the extent of bark damage, crown injury, and tree size, were correlated to infestations by different bark bee...

New forest health monitoring methods tested and found effective

Year: 2017
Disturbance processes such as insect outbreaks are natural disturbance agents in forests. The frequency and intensity of disturbances is expected to increase as the climate changes. Tools are needed to assist managers in determining how disturbances affect the sustainability of forests. To help wi...

Synthesis Paper on the Mountain Pine Beetle Biology and Management Now Available

Year: 2014
A series of 10 papers prepared by experts on mountain pine present a synthesis of the state of the knowledge on selected aspects on the beetle biology, ecology, and management of the insect. The synthesis involved mountain pine beetle literature dating back to the late 1890s. It was prepared primari...