10.5061/DRYAD.BG79CNP74
Burner, Ryan C.
0000-0002-7314-9506
Louisiana State University
Boyce, Andy J.
University of Montana
Styring, Alison
The Evergreen State College
Martin, Tom
University of Montana
Bernasconi, David
Louisiana State University
Sheldon, Frederick
0000-0002-0815-8780
Louisiana State University
Data from: Biotic interactions help explain variation in elevational range
limits of birds among Bornean mountains
Dryad
dataset
2020
diffuse competition
feeding guild
congener
abiotic factors
elevational gradients
interspecific competition
Massenerhebung effect
Mt. Kinabalu
Mt. Mulu
Mt. Pueh
abundance-occupancy relationship
MME
regression
FOS: Biological sciences
Malaysia
Borneo
National Science Foundation
https://ror.org/021nxhr62
DEB-1241059
National Science Foundation
https://ror.org/021nxhr62
DEB-1241041
National Science Foundation
https://ror.org/021nxhr62
DEB-1651283
National Science Foundation
https://ror.org/021nxhr62
IOS-1656120
National Geographic Society
https://ror.org/04bqh5m06
8753-10
American Indonesian Exchange Foundation
https://ror.org/02gp9c631
Fulbright Fellowship to RCB
Louisiana Board of Regents
https://ror.org/00jv89z46
Graduate fellowship to RCB
Wesley M. Dixon Memorial Fellowship
Fellowship to AJB
American Ornithological Society
https://ror.org/03wy7n216
AOU Graduate Student Research Grant to AJB
2020-11-28T00:00:00Z
2020-01-14T00:00:00Z
en
https://doi.org/10.5061/dryad.677b1c7
https://doi.org/10.1111/jbi.13784
181870 bytes
7
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Aim Physiological tolerances and biotic interactions along habitat
gradients are thought to influence species occurrence. Distributional
differences caused by such forces are particularly noticeable on tropical
mountains, where high species turnover along elevational gradients occurs
over relatively short distances and elevational distributions of
particular species can shift among mountains. Such shifts are interpreted
as evidence of the importance of spatial variation in interspecific
competition and habitat or climatic gradients. To assess the relative
importance of competition and compression of habitat and climatic zones in
setting range limits, we examined differences in elevational ranges of
forest bird species among four Bornean mountains with distinct features.
Location Bornean mountains Kinabalu, Mulu, Pueh and Topap Oso. Taxon Rain
forest bird communities along elevational gradients. Methods We surveyed
the elevational ranges of rain forest birds on four mountains in Borneo to
test which environmental variables—habitat zone compression or presence of
likely competitors—best predicted differences in elevational ranges of
species among mountains. For this purpose, we used two complementary
tests: a comparison of elevational range limits between pairs of
mountains, and linear mixed models with naïve occupancy as the response
variable. Results We found that lowland species occur higher in elevation
on two small mountains compared to Mt. Mulu. This result is inconsistent
with the expectation that distributions of habitats are elevationally
compressed on small mountains, but is consistent with the hypothesis that
a reduction in competition (likely diffuse) on short mountains, which
largely lack montane specialist species, allows lowland species to occur
higher in elevation. The relative influence of competition changes with
elevation, and the correlation between lower range limits of montane
species and the distribution of their competitors was weaker than in
lowland species. Main conclusions These findings provide support for the
importance of biotic interactions in setting elevational range limits of
tropical bird species, although abiotic gradients explain the majority of
distribution patterns. Thus, models predicting range shifts under climate
change scenarios must include not only climatic variables, as is currently
most common, but also information on potentially resulting changes in
species interactions, especially for lowland species.
These data estimate the occupancy of each bird species at each elevation
on each of four mountains in Borneo. Species detected fewer than 10 times
on a given mountain are excluded. This 'naive occupancy' value
was estimated by dividing the number of points where the species was
detected on a given mountain at a given elevation by the total number of
points at that elevation. Points were lumped into elevational bins; see
manuscript. Also includes estimates of the summed occupancy of potential
competitors of the same genus and of the same foraging guild (these
estimates are obtained as above).
README file included in the Excel file.