Ecosphere
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Estimating trophic position in marine and estuarine food webs
Ecosphere - Tập 3 Số 3 - Trang 1-20 - 2012
Structural or binary approaches, based on presence‐absence of feeding links, are
the most common method of assembling food webs and form the basis of the most
well explored food web models. Binary approaches to assembling feeding links are
often criticized as being less powerful and accurate than flow‐based methods. To
test this assumption we compared binary estimates of trophic position with
esti...
How a new fire‐suppression policy can abruptly reshape the fire‐weather relationship
Ecosphere - Tập 6 Số 10 - Trang 1-19 - 2015
Understanding how the interactions between anthropogenic and biophysical factors
control fire regimes is increasingly becoming a major concern in a context of
climate, economic and social changes. On a short time scale, fire activity is
mainly driven by the variations in weather conditions. But while the assessment
of this fire‐weather relationship is an essential step towards fire hazard
estimati...
The fire frequency‐severity relationship and the legacy of fire suppression in California forests
Ecosphere - Tập 6 Số 1 - Trang 1-23 - 2015
Fire is one of the most important natural disturbance processes in the western
United States and ecosystems differ markedly with respect to their ecological
and evolutionary relationships with fire. Reference fire regimes in forested
ecosystems can be categorized along a gradient ranging from “fuel‐limited” to
“climate‐limited” where the former types are often characterized by frequent,
lower‐seve...
Assignment of nesting loggerhead turtles to their foraging areas in the Northwest Atlantic using stable isotopes
Ecosphere - Tập 3 Số 10 - Trang 1-18 - 2012
Differential foraging area use can affect population demographics of highly
migratory fauna because of differential environmental changes and anthropogenic
threats among those areas. Thus, identification of foraging areas is vital for
the development of effective management strategies for endangered migratory
species. In this study, we assigned 375 loggerhead turtles (Caretta caretta)
nesting at s...
Ecohydrology with unmanned aerial vehicles
Ecosphere - Tập 5 Số 10 - Trang 1-14 - 2014
High‐resolution characterizations and predictions are a grand challenge for
ecohydrology. Recent advances in flight control, robotics and miniaturized
sensors using unmanned aerial vehicles (UAVs) provide an unprecedented
opportunity for characterizing, monitoring and modeling ecohydrologic systems at
high‐resolution (<1 m) over a range of scales. How can the ecologic and
hydrologic communities mo...
Grasslands—more important for ecosystem services than you might think
Ecosphere - Tập 10 Số 2 - 2019
AbstractExtensively managed grasslands are recognized globally for their high
biodiversity and their social and cultural values. However, their capacity to
deliver multiple ecosystem services (ES) as parts of agricultural systems is
surprisingly understudied compared to other production systems. We undertook a
comprehensive overview of ES provided by natural and semi‐natural grasslands,
using sout...
Indirect effects of invasive species affecting the population structure of an ecosystem engineer
Ecosphere - Tập 6 Số 7 - Trang 1-12 - 2015
Species invasion is of increasing concern as non‐native species often have
negative impacts on ecosystems that they were introduced to. Invaders negatively
affect the abundance of native species due to direct interactions like predation
and competition. Additionally, invaders may benefit native biota by imposing
indirect effects on resident species interactions. Invaders indirectly affect
resident...
Modeling the costs and benefits of seed scatterhoarding to plants
Ecosphere - Tập 6 Số 4 - Trang 1-8 - 2015
Many plants interact with scatterhoarding animals as mutualists (seed
dispersers) and antagonists (seed predators) simultaneously, but the net effects
of scatterhoarding animals are rarely measured. In seed‐dispersal mutualisms,
plant benefits (recruitment) received from dispersal agents should outweigh the
costs, resulting in a relative fitness gain. Otherwise, plant populations cannot
be sustain...
Disturbance, complexity, and succession of net ecosystem production in North America's temperate deciduous forests
Ecosphere - Tập 7 Số 6 - 2016
AbstractCentury‐old forests in the U.S. upper Midwest and Northeast power much
of North America's terrestrial carbon (C) sink, but these forests' production
and C sequestration capacity are expected to soon decline as fast‐growing early
successional species die and are replaced by slower growing late successional
species. But will this really happen? Here we marshal empirical data and
ecological t...
Suitability of Laurentian Great Lakes for invasive species based on global species distribution models and local habitat
Ecosphere - Tập 8 Số 7 - 2017
AbstractEfficient management and prevention of species invasions requires
accurate prediction of where species of concern can arrive and persist. Species
distribution models provide one way to identify potentially suitable habitat by
developing the relationship between climate variables and species occurrence
data. However, these models when applied to freshwater invasions are complicated
by two f...
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