6 Works

Cross-ecosystem bottlenecks alter reciprocal subsidies within meta-ecosystems

Amanda Klemmer, Mark Galatowitsch & Angus McIntosh
Reciprocal subsidies link ecosystems into meta-ecosystems, but energy transfer to organisms that do not cross boundaries may create sinks, reducing reciprocal subsidy transfer. We investigated how the type of subsidy and top predator presence influenced reciprocal flows of energy, by manipulating the addition of terrestrial leaf and terrestrial insect subsidies to experimental freshwater pond mesocosms with and without predatory fish. Over 18 months, fortnightly addition of subsidies (terrestrial beetle larvae) to top-predators was crossed with...

Data from: Associations between testosterone and immune activity in alligators depend on bacteria species and temperature

Ashley A. LaVere, Heather J. Hamlin, Russell H. Lowers, Benjamin B. Parrott & Vanessa O. Ezenwa
Males often use elaborate sexual traits to enhance reproduction, but can experience trade-offs between investment in these traits and other physiological needs. The immunocompetence handicap hypothesis (ICHH) postulates that testosterone supports development of sexual traits while also suppressing immunity. While the ICHH implicates testosterone-mediated immunosuppression as a key mechanism of honest signaling in males, conflicting patterns across studies suggest that testosterone-immunity interactions are complex. In this study, we test the ICHH in free-ranging alligators and...

Habitat openness and edge avoidance predict saltmarsh sparrow abundance better than habitat area

Hallie Marshall, Erik Blomberg, Valerie Watson, Meaghan Conway, Jonathan Cohen, Maureen Correll, Chris Elphick, Thomas Hodgman, Alison Kocek, Adrienne Kovach, W. Gregory Shriver, Whitney Wiest & Brian Olsen
The Saltmarsh Sparrow (Ammospiza caudacuta) is a tidal marsh bird facing rapid population decline throughout its range, largely caused by degradation and loss of breeding habitat. Thus there is a need to preserve tidal marshes in the northeastern United States, but to do so requires an understanding of the habitat features that support robust populations. Previous studies have shown Saltmarsh Sparrow abundance increases with marsh size, but in similar bird species, area sensitivity is more...

The effectiveness of flower strips and hedgerows on pest control, pollination services and crop yield: a quantitative synthesis

Matthias Albrecht, David Kleijn, Neal Williams, Matthias Tschumi, Brett Blaauw, Riccardo Bommarco, Alistair Campbell, Matteo Dainese, Frank Drummond, Martin Entling, Dominik Ganser, Arjen De Groot, David Goulson, Heather Grab, Hannah Hamilton, Felix Herzog, Rufus Isaacs, Katja Jacot, Philippe Jeanneret, Mattias Jonsson, Eva Knop, Claire Kremen, Doug Landis, Greg Loeb, Lorenzo Marini … & Louis Sutter
Floral plantings are promoted to foster ecological intensification of agriculture through provisioning of ecosystem services. However, a comprehensive assessment of the effectiveness of different floral plantings, their characteristics and consequences for crop yield is lacking. Here we quantified the impacts of flower strips and hedgerows on pest control (18 studies) and pollination services (17 studies) in adjacent crops in North America, Europe and New Zealand. Flower strips, but not hedgerows, enhanced pest control services in...

Environmental conditions and call-broadcast influence detection of eastern forest owls during standardized surveys

Kyle Lima, Erynn M. Call, Thomas P. Hodgman, David S. Potter & Susan Gallo
Owls provide ecosystem services and play crucial roles in the environment making them important to monitor and study. However, standardized methods for most species do not exist, and we lack understanding of the effects of many environmental variables and call-broadcast on detection probability of owls. We performed a multispecies occupancy analysis of owl monitoring data collected from 2004 – 2013 across the state of Maine to examine the effects of environmental variables, conspecific and heterospecific...

Coupling between tree water use and calcium accumulation

Yongjiang Zhang & Xiaoming Zou
Although it is well-known that transpiration is the major driving force for plant nutrient uptake/transport, the coupling between these two processes has not been well-established. Calcium (Ca) is a good candidate to evaluate the coupling between transpiration (water use) and nutrient accumulation as Ca uptake is a passive process without relocation once incorporated, thus avoiding the confounding effects of active regulation and translocation. Here we developed a novel theoretical equation to use soil-to-plant calcium ratio...

Registration Year

  • 2020
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Resource Types

  • Dataset
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Affiliations

  • University of Maine
    6
  • University of Georgia
    2
  • University of Sussex
    1
  • SUNY College of Environmental Science and Forestry
    1
  • Estonian University of Life Sciences
    1
  • University of Worcester
    1
  • Centre College
    1
  • Lund University
    1
  • University of California, Berkeley
    1
  • University of Koblenz and Landau
    1