reference : Drought-induced shift of a forest-woodland ecotone: Rapid landscape response to climate variation

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/reference/4b677077-2268-422c-be0f-e3b2ed0baee0
Bibliographic fields
reftype Journal Article
Abstract In coming decades, global climate changes are expected to produce large shifts in vegetation distributions at unprecedented rates. These shifts are expected to be most rapid and extreme at ecotones, the boundaries between ecosystems, particularly those in semiarid landscapes. However, current models do not adequately provide for such rapid effects-particularly those caused by mortality-largely because of the lack of data from field studies. Here we report the most rapid landscape-scale shift of a woody ecotone ever documented: in northern New Mexico in the 1950s, the ecotone between semiarid ponderosa pine forest and pinon-juniper woodland shifted extensively (2 km or more) and rapidly (<5 years) through mortality of ponderosa pines in response to a severe drought. This shift has persisted for 40 years. Forest patches within the shift zone became much more fragmented, and soil erosion greatly accelerated. The rapidity and the complex dynamics of the persistent shift point to the need to represent more accurately these dynamics, especially the mortality factor, in assessments of the effects of climate change.
Accession Number ISI:000077436700046
Author Allen, Craig D. Breshears, David D.
Author Address Allen, CD (reprint author), US Geol Survey, Jemenz Mt Field Stn, Midcontinent Ecol Sci Ctr, HCR 1,Box 1,15, Los Alamos, NM 87544 USA; US Geol Survey, Jemenz Mt Field Stn, Midcontinent Ecol Sci Ctr, Los Alamos, NM 87544 USA; Los Alamos Natl Lab, Environm Sci Grp, Los Alamos, NM 87545 USA
DOI 10.1073/pnas.95.25.14839
Date December 8, 1998
ISSN 0027-8424
Issue 25
Journal Proceedings of the National Academy of Sciences
Keywords climate change; vegetation; ecotone; ecoregions; shifts
Language English
Pages 14839-14842
Title Drought-induced shift of a forest-woodland ecotone: Rapid landscape response to climate variation
URL http://www.pnas.org/content/95/25/14839.full.pdf+html
Volume 95
Year 1998
Bibliographic identifiers
.reference_type 0
_chapter ["Ch. 20: Southwest FINAL","Ch. 8: Ecosystems FINAL"]
_record_number 547
_uuid 4b677077-2268-422c-be0f-e3b2ed0baee0