Now showing items 1-20 of 87

    • Analysis of Abrupt Transitions in Ecological Systems 

      Bestelmeyer, Brandon T.; Ellison, Aaron M.; Fraser, William R.; Gorman, Kristen B.; Holbrook, Sally J.; Laney, Christine M.; Ohman, Mark D.; Peters, Debra P. C.; Pillsbury, Finn C.; Rassweiler, Andrew; Schmitt, Russell J.; Sharma, Sapna (Ecological Society of America, 2011)
      The occurrence and causes of abrupt transitions, thresholds, or regime shifts between ecosystem states are of great concern and the likelihood of such transitions is increasing for many ecological systems. General understanding ...
    • Analytic Webs Support the Synthesis of Ecological Data Sets 

      Ellison, Aaron M.; Osterweil, Leon; Hadley, Julian L.; Wise, Alexander; Boose, Emery Robert; Clarke, Lori; Foster, David Russell; Hanson, Allen; Jensen, David Michael; Kuzeja, Paul; Riseman, Edward; Schultz, Howard (Ecological Society of America, 2006)
      A wide variety of data sets produced by individual investigators are now synthesized to address ecological questions that span a range of spatial and temporal scales. It is important to facilitate such syntheses so that ...
    • The Ants of Nantucket: Unexpectedly High Biodiversity in an Anthropogenic Landscape 

      Ellison, Aaron M. (Eagle Hill Publications, 2012)
      This first comprehensive assessment of the ant fauna of Nantucket Island, Massachusetts revealed that 43% of New England ant species and 70% of New England ant genera occur on an island occupying only 0.07% of New England’s ...
    • Assessing the impacts of the decline of Tsuga canadensisstands on two amphibian species in a New England forest 

      Siddig, Ahmed Ali; Ellison, Aaron M.; Mathewson, Brooks (Wiley-Blackwell, 2016)
      Disturbances such as outbreaks of herbivorous insects and pathogens can devastate unique habitats and directly reduce biodiversity. The foundation tree species Tsuga canadensis (eastern hemlock) is declining due to infestation ...
    • Atmospheric deposition exposes Qinling pandas to toxic pollutants 

      Chen, Yi-ping; Zheng, Ying-juan; Liu, Qiang; Song, Yi; An, Zhi-sheng; Ma, Qing-yi; Ellison, Aaron M. (Wiley-Blackwell, 2017)
      The giant panda (Ailuropoda melanoleuca) is one of the most endangered animals in the world, and it is recognized worldwide as a symbol for conservation. A previous study showed that wild and captive pandas were exposed ...
    • Canopy and Litter Ant Assemblages Share Similar Climate-Species Density Relations 

      Weiser, Michael; Sanders, Nathan J.; Agosti, Donat; Anderson, Alan N.; Ellison, Aaron M.; Fisher, Brian L.; Gibb, Heloise; Gotelli, Nicholas; Gove, Aaron; Gross, Kevin; Janda, Milan; Kaspari, Michael; Lessard, Jean-Phillippe; Longino, John T.; Majer, Jonathan; Menke, Sean; Terrence, McGlynn; Parr, Catherine; Philpott, Stacy; Retana, Javier; Suarez, Andrew; Vasconcelos, Heraldo; Yanoviak, Stephen; Dunn, Robert; Guénard, Benoit (Royal Society, 2010)
      Tropical forest canopies house most of the globe’s diversity, yet little is known about global patterns and drivers of canopy diversity. Here we present models of ant species density, using climate, abundance and habitat ...
    • Climatic Drivers of Hemispheric Asymmetry in Global Patterns of Ant Species Richness 

      Arnan, Xavier; McGlynn, Terrence P.; Bruhl, Carsten A.; Agosti, Donat; Lessard, Jean-Philippe; Anderson, Alan N.; Vascibcekis, Heraldo L.; Laurent, Edward J.; Kaspari, Michael E.; Guenard, Benoit; Janda, Milan; Fitzpatrick, Matthew; Pfeiffer, Martin; Weiser, Michael D.; Philpott, Stacy M.; Gove, Aaron D.; Retana, Javier; Suarez, Andrew V.; Dunn, Robert R.; Ellison, Aaron; Cerda, Xim; Parr, Catherine L.; Longino, John T.; Majer, Jonathan D.; Fisher, Brian L.; Manke, Sean B.; Sanders, Nathan J.; Gotelli, Nicholas J.; Gib, Heloise (Blackwell Science, 2009)
      Although many taxa show a latitudinal gradient in richness, the relationship between latitude and species richness is often asymmetrical between the northern and southern hemispheres. Here we examine the latitudinal pattern ...
    • Climatic warming destabilizes forest ant communities 

      Diamond, S. E.; Nichols, L. M.; Pelini, S. L.; Penick, C. A.; Barber, G. W.; Cahan, S. H.; Dunn, R. R.; Ellison, Aaron M.; Sanders, N. J.; Gotelli, N. J. (American Association for the Advancement of Science (AAAS), 2016)
      How will ecological communities change in response to climate warming? Direct effects of temperature and indirect cascading effects of species interactions are already altering the structure of local communities, but the ...
    • Commentary: All species are important, but some species are more important than others 

      Ellison, Aaron M.; Degrassi, Allyson L. (Wiley-Blackwell, 2008)
      Foundation species control biodiversity and ecosystem processes, but are difficult to identify. In this issue of Journal of Vegetation Science, Elumeeva et al. show that Festuca varia and Nardus stricta act as foundation ...
    • Common Garden Experiments Reveal Uncommon Responses across Temperatures, Locations, and Species of Ants 

      Pelini, Shannon Lynn; Diamond, Sarah E.; MacLean, Heidi; Ellison, Aaron M.; Gotelli, Nicholas J.; Sanders, Nathan J.; Dunn, Robert R. (Wiley Open Access, 2012-10-12)
      Population changes and shifts in geographic range boundaries induced by climate change have been documented for many insect species. On the basis of such studies, ecological forecasting models predict that, in the absence ...
    • Construction Costs, Payback Times, and the Leaf Economics of Carnivorous Plants 

      Karagatzides, Jim D.; Ellison, Aaron (Botanical Society of America, 2009)
      Understanding how different and functional types "invest" carbon and nutrients is a major goal of plant ecologists. Two measures of such investments are "construction costs" (carbon needed to produce each gram of tissue) ...
    • Convergence in Multispecies Interactions 

      Bittleston, Leonora Sophia; Pierce, Naomi E.; Ellison, Aaron M.; Pringle, Anne (Elsevier BV, 2016)
      The concepts of convergent evolution and community convergence highlight how selective pressures can shape unrelated organisms or communities in similar ways. We propose a related concept, convergent interactions, to ...
    • Counting Ants (Hymenoptera: Formicidae): Biodiversity Sampling and Statistical Analysis for Myrmecologists 

      Gotelli, Nicholas J.; Ellison, Aaron M.; Dunn, Robert R.; Sanders, Nathan J. (Austrian Society of Entomofaunistics, 2011)
      Biodiversity sampling is labor intensive and is especially challenging for myrmecologists, because the sampling units (individual workers) do not correspond in a simple way to the natural units of diversity (individual ...
    • Critical minimum temperature limits xylogenesis and maintains treelines on the southeastern Tibetan Plateau 

      Li, Xiaoxiang; Liang, Eryuan; Gri?ar, Jozica; Rossi, Sergio; Cufar, Katarina; Ellison, Aaron M. (Elsevier BV, 2017)
      Physiological and ecological mechanisms that define treelines are still debated. It has been suggested that the absence of trees above the treeline is caused by low temperatures that limit growth. Thus, we hypothesized ...
    • Detecting Ecological Patterns Along Environmental Gradients: Alpine Treeline Ecotones 

      Buckley, Hannah; Case, Bradley; Vallejos, Ronny; Camarero, J. Julio; Gutiérrez, Emilia; Liang, Eryuan; Wang, Yafeng; Ellison, Aaron M. (Informa UK Limited, 2016)
    • Detecting Temporal Trends in Species Assemblages with Bootstrapping Procedures and Hierarchical Models 

      Gotelli, Nicholas; Dorazio, Robert; Ellison, Aaron M. (Royal Society, 2010)
      Quantifying patterns of temporal trends in species assemblages is an important analytical challenge in community ecology. We describe methods of analysis that can be applied to a matrix of counts of individuals that is ...
    • Detection probabilities for sessile organisms 

      Berberich, Gabriele M.; Dormann, Carsten F.; Klimetzek, Dietrich; Berberich, Martin B.; Sanders, Nathan J.; Ellison, Aaron M. (Wiley-Blackwell, 2016)
      Estimation of population sizes and species ranges are central to population and conservation biology. It is widely appreciated that imperfect detection of mobile animals must be accounted for when estimating population ...
    • Early Warning Signals of Ecological Transitions: Methods for Spatial Patterns 

      Kéfi, Sonia; Guttal, Vishwesha; Brock, William A.; Carpenter, Stephen R.; Ellison, Aaron M.; Livina, Valerie N.; Seekell, David A.; Scheffer, Marten; van Nes, Egbert H.; Dakos, Vasilis (Public Library of Science, 2014)
      A number of ecosystems can exhibit abrupt shifts between alternative stable states. Because of their important ecological and economic consequences, recent research has focused on devising early warning signals for ...
    • Ecological Boundary Detection Using Bayesian Areal Wombling 

      Fitzpatrick, Matthew C.; Preisser, Evan L.; Porter, Adam; Elkinton, Joseph; Waller, Lance A.; Carlin, Bradley P.; Ellison, Aaron M. (Ecological Society of America, 2010)
      The study of ecological boundaries and their dynamics is of fundamental importance to much of ecology, biogeography, and evolution. Over the past two decades, boundary analysis (of which wombling is a subfield) has received ...
    • Ecological network metrics: opportunities for synthesis 

      Lau, Matthew; Borrett, Stuart R.; Baiser, Benjamin; Gotelli, Nicholas J.; Ellison, Aaron M. (Wiley-Blackwell, 2017)
      Network ecology provides a systems basis for approaching ecological questions, such as factors that influence biological diversity, the role of particular species or particular traits in structuring ecosystems, and long-term ...