Ecography
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Evolution of dispersal strategies and dispersal syndromes in fragmented landscapes
Ecography - Tập 40 Số 1 - Trang 56-73 - 2017
Habitat fragmentation, an important element of current global change, has
profound repercussions on population and species extinction. Landscape
fragmentation reduces individual movements between patches (i.e. dispersal)
while such movements connecting patches enhance the persistence of
metapopulations and metacommunities. Through the recognition of non‐random
movements, dispersal has recently bee...
Assembly rules of ectoparasite communities across scales: combining patterns of abiotic factors, host composition, geographic space, phylogeny and traits
Ecography - Tập 38 Số 2 - Trang 184-197 - 2015
We investigated the role of environmental filtering as an underlying mechanism
of assembly of compound communities of fleas parasitic on Palearctic small
mammals at two spatial scales; a continental scale (encompassing regions across
the entire Palearctic) and a regional scale (across sampling localities within
Slovakia). We used the three‐table ordination (the RLQ analysis) and its
extended versi...
Hierarchical effects of environmental filters on the functional structure of plant communities: a case study in the French Alps
Ecography - Tập 36 Số 3 - Trang 393-402 - 2013
Understanding the influence of the environment on the functional structure of
ecological communities is essential to predict the response of biodiversity to
global change drivers. Ecological theory suggests that multiple environmental
factors shape local species assemblages by progressively filtering species from
the regional species pool to local communities. These successive filters should
influ...
Do stream fish track climate change? Assessing distribution shifts in recent decades
Ecography - Tập 36 Số 11 - Trang 1236-1246 - 2013
Understanding the ability of species to shift their distribution ranges in
response to climate change is crucial for conservation biologists and resources
managers. Although freshwater ecosystems include some of the most imperilled
fauna worldwide, such range shifts have been poorly documented in streams and
rivers and have never been compared to the current velocity of climate change.
Based on na...
Collinearity: a review of methods to deal with it and a simulation study evaluating their performance
Ecography - Tập 36 Số 1 - Trang 27-46 - 2013
Collinearity refers to the non independence of predictor variables, usually in a
regression‐type analysis. It is a common feature of any descriptive ecological
data set and can be a problem for parameter estimation because it inflates the
variance of regression parameters and hence potentially leads to the wrong
identification of relevant predictors in a statistical model. Collinearity is a
severe...
Food‐web structure varies along environmental gradients in a high‐latitude marine ecosystem
Ecography - Tập 42 Số 2 - Trang 295-308 - 2019
Large‐scale patterns in species diversity and community composition are
associated with environmental gradients, but the implications of these patterns
for food‐web structure are still unclear. Here, we investigated how spatial
patterns in food‐web structure are associated with environmental gradients in
the Barents Sea, a highly productive shelf sea of the Arctic Ocean. We compared
food webs from...
Modeling of species distributions with Maxent: new extensions and a comprehensive evaluation
Ecography - Tập 31 Số 2 - Trang 161-175 - 2008
Accurate modeling of geographic distributions of species is crucial to various
applications in ecology and conservation. The best performing techniques often
require some parameter tuning, which may be prohibitively time‐consuming to do
separately for each species, or unreliable for small or biased datasets.
Additionally, even with the abundance of good quality data, users interested in
the applic...
spThin: an R package for spatial thinning of species occurrence records for use in ecological niche models
Ecography - Tập 38 Số 5 - Trang 541-545 - 2015
Spatial thinning of species occurrence records can help address problems
associated with spatial sampling biases. Ideally, thinning removes the fewest
records necessary to substantially reduce the effects of sampling bias, while
simultaneously retaining the greatest amount of useful information. Spatial
thinning can be done manually; however, this is prohibitively time consuming for
large datasets...
Minimum required number of specimen records to develop accurate species distribution models
Ecography - Tập 39 Số 6 - Trang 542-552 - 2016
Species distribution models (SDMs) are widely used to predict the occurrence of
species. Because SDMs generally use presence‐only data, validation of the
predicted distribution and assessing model accuracy is challenging. Model
performance depends on both sample size and species’ prevalence, being the
fraction of the study area occupied by the species. Here, we present a novel
method using simulat...
Using trait and phylogenetic diversity to evaluate the generality of the stress‐dominance hypothesis in eastern North American tree communities
Ecography - Tập 37 Số 9 - Trang 814-826 - 2014
The stress‐dominance hypothesis (SDH) is a model of community assembly
predicting that the relative importance of environmental filtering increases and
competition decreases along a gradient of increasing environmental stress. Tests
of the SDH at limited spatial scales have thus far demonstrated equivocal
support and no prior study has assessed the generality of the SDH at continental
scales. We e...
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