Record Details
Host–parasite distributions under changing climate: Tsuga heterophylla and Arceuthobium tsugense in Alaska
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Host–parasite distributions under changing climate: Tsuga heterophylla and Arceuthobium tsugense in Alaska |
| Names |
Barrett, Tara M.
(creator) Latta, Greg (creator) Hennon, Paul E. (creator) Eskelson, Bianca N.I. (creator) Temesgen, Hailemariam (creator) |
| Date Issued | 2012-04 (iso8601) |
| Note | To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by NRC Research Press and can be found at: http://www.nrcresearchpress.com/ |
| Abstract | Dwarf mistletoes (Arceuthobium species) influence many processes within forested ecosystems, but few studies have examined their distribution in relation to climate. An analysis of 1549 forested plots within a 14.5 million ha region of southeast Alaska provided strong indications that climate currently limits hemlock dwarf mistletoe (Arceuthobium tsugense (Rosendahl) G.N. Jones) to a subset of the range of its primary tree host, western hemlock (Tsuga heterophylla (Raf.) Sarg.), with infection varying from a high of 20% of trees at sea level to only 5% by 200 m elevation. Three types of modeling approaches (logistic, most similar neighbors, and random forests) were tested for the ability to simultaneously predict abundance and distribution of host and pathogen as a function of climate variables. Current distribution was explained well by logistic models using growing degree-days, indirect and direct solar radiation, rainfall, snowfall, slope, and minimum temperatures, although accuracy for predicting A. tsugense presence at a particular location was only 38%. For future climate scenarios (A1B, A2, and B1), projected increases for A. tsugense habitat over a century ranged from a low of 374% to a high of 757%, with differences between modeling approaches contributing more to uncertainty than differences between climate scenarios. |
| Genre | Article |
| Topic | Dwarf mistletoe infection |
| Identifier | Barrett, T. M., Latta, G., Hennon, P. E., Eskelson, B. N. I., & Temesgen, H. (2012). Host–parasite distributions under changing climate: Tsuga heterophylla and arceuthobium tsugense in alaska. Canadian Journal of Forest Research, 42(4), 642-656. doi: 10.1139/x2012-016 |
