10.5061/DRYAD.NP44K70
Butterfield, Bradley J.
Northern Arizona University
Anderson, R. Scott
Northern Arizona University
Holmgren, Camille A.
Buffalo State College
Betancourt, Julio L.
United States Geological Survey
Data from: Extinction debt and delayed colonization have had comparable
but unique effects on plant community-climate lags since the Last Glacial
Maximum
Dryad
dataset
2019
~54kya to present
Extinction debt
Deserts
dispersal limitation
Climate niche
2019-06-10T07:08:36Z
2019-06-10T07:08:36Z
en
https://doi.org/10.1111/geb.12915
90717 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Aim: Plant communities typically exhibit lagged responses to climate
change due to poorly-understood effects of colonization and local
extinction. Here, we quantify rates of change in mean cold tolerances, and
contributions of colonization and local extinction to those rates,
recorded in plant macrofossil assemblages from North American hot deserts
over the last 30,000 years. Location: Mojave, Sonoran and Chihuahuan
Deserts Time period: 30-0 thousand years before present (kybp) Major taxa
studied: Vascular plants Methods: Colonization and local extinction dates
for 269 plant species were approximated from macrofossils in 15 packrat
(Neotoma) midden series. Cold tolerances estimated from contemporary
climate were used to quantify assemblage-mean cold tolerances through
time. Rates of colonization and local extinction, and their effects on
rates of change in assemblage-mean cold tolerances, were estimated for
30-20 kybp (Late Pleistocene, no directional warming), 20-10 kybp
(deglaciation, rapid warming), and 10-0 kybp (Holocene, no directional
warming). Results: Rates of change in all metrics were negligible during
the Late Pleistocene. Rates of change in assemblage-mean cold tolerances
(mean 1.0 ⁰C x10-4 yr-1) lagged behind warming during deglaciation, and
continued at similar rates (1.2 ⁰C x10-4 yr-1) throughout the Holocene.
Colonization and local extinction contributed equally to delayed responses
to warming, but their dynamics differed through time: Colonization by
warm-adapted species predominated during deglaciation, while the most
heat-adapted species exhibited long delays in colonization. Only the most
cold-adapted species went locally extinct during deglaciation, followed by
slow repayment of the extinction debt of cool-adapted species during the
Holocene. Conclusions: Responses to rapid warming can persist for
millennia, even after cessation of warming. Consistent patterns from
different midden series across the region support a metacommunity model in
which dispersal interacts with environmental filters and buffers against
local extinction to drive community-climate disequilibrium during and
after periods of warming.
TableS01 - Colonization and extinction dates for each species and
siteTableS01.csvTableS02 - Climatic tolerance estimates of speciesSuffix
'05' refers to species 5th percentile, '95' to the
95th percentile. NAs for species with insufficient number of occurrence
recordsTableS02.csv
North America