Skip to Main Content
Southern Pine Beetle Ecology: Populations within StandsAuthor(s): Matthew P. Ayres; Sharon J. Martinson; Nicholas A. Friedenberg
Source: In: Coulson, R.N.; Klepzig, K.D. 2011. Southern Pine Beetle II. Gen. Tech. Rep. SRS-140. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 75-89.
Publication Series: General Technical Report (GTR)
Station: Southern Research Station
PDF: View PDF (11.95 MB)
DescriptionPopulations of southern pine beetle (SPB) are typically substructured into local aggregations, each with tens of thousands of individual beetles. These aggregations, known as “spots” because of their appearance during aerial surveys, are the basic unit for the monitoring and management of SPB populations in forested regions. They typically have a maximum lifespan of 1 year, being born in the spring when dispersing SPB aggregate at points in the forest. Spots that survive to the following spring produce the dispersing beetles that form a new population of spots. SPB epidemics rise and fall with interannual variation in the number of spots within a region. Many spots, especially those that begin small, die an early death by midsummer. Others may grow throughout the summer and into the winter via a self-propagating progression of tree attacks that is critically structured by semiochemicals. Forces that influence the growth of populations within spots strongly influence the dynamic fluctuations in SPB impacts on regional forests. These forces include pine species composition, habitat edges, age and basal area of pine stands, tree defenses, the predator Thanasimus dubius, interactions with phoretic mites and fungi, climate, and movement of beetles into and out of spots.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationAyres, Matthew P.; Martinson, Sharon J.; Friedenberg, Nicholas A. 2011. Southern Pine Beetle Ecology: Populations within Stands. In: Coulson, R.N.; Klepzig, K.D. 2011. Southern Pine Beetle II. Gen. Tech. Rep. SRS-140. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 75-89.
Keywordsaggregation behavior, Allee effect, basal area, forest management, Ophiostoma, pheromone, population structure, SPBIS, suppression, Tarsonemus, temperature, Thanasimus, tree defense
- Population Dynamics of Southern Pine Beetle in Forest Landscapes
- Mechanical Control of Southern Pine Beetle Infestations
- Simulating the effects of the southern pine beetle on regional dynamics 60 years into the future
XML: View XML