Now showing items 24-43 of 130

    • Chromosome synapsis and recombination in male hybrids between two chromosome races of the common shrew (Sorex araneus L., Soricidae, Eulipotyphla) 

      Belonogova, N.M.; Polyakov, A.V.; Karamysheva, T.V.; Torgasheva, A.A.; Searle, J. B.; Borodin, P.M. (Multidisciplinary Digital Publishing Insitute (MDPI), 2017-10-20)
      Hybrid zones between chromosome races of the common shrew (Sorex araneus) provide exceptional models to study the potential role of chromosome rearrangements in the initial steps of speciation. The Novosibirsk and Tomsk ...
    • Coastal marine eutrophication: Control of both nitrogen and phosphorus is necessary 

      Howarth, R. W.; Paerl, H. (PNAS, 2008-12-09)
      Human activities have clearly caused dramatic alterations of the terrestrial nitrogen cycle, and analyses of the extent and effects of such changes are now common in the scientific literature. However, any attempt to ...
    • Coexistance of three specialist aphids on common milkweed, Asclepias syriaca 

      Smith, R.A.; Mooney, Kailen A.; Agrawal, Anurag A. (Ecological Society of America, 2008-08-01)
      Coexistence of host?specific herbivores on plants is believed to be governed by interspecific interactions, but few empirical studies have systematically unraveled these dynamics. We investigated the role of several factors ...
    • Colonization, mouse-style 

      Gabriel, Sofia I; Jóhannesdóttir, Fríða; Jones, Eleanor P; Searle, Jeremy B. (BioMed Central, 2010-10-26)
      Several recent papers, including one in BMC Evolutionary Biology, examine the colonization history of house mice. As well as background for the analysis of mouse adaptation, such studies offer a perspective on the history ...
    • Community heterogeneity and the evolution of interactions between plants and insect herbivores 

      Agrawal, Anurag A.; Lau, Jennifer A.; Hamback, Peter A. (University of Chicago Press, 2006-12)
      Plant communities vary tremendously in terms of productivity, species diversity, and genetic diversity within species. This vegetation heterogeneity can impact both the likelihood and strength of interactions between plants ...
    • Community-wide convergent evolution in insect adaptation to toxic cardenolides by substitutions in the NA,K-ATPase 

      Dobler, Susanne; Dalla, Safaa; Wagschal, Vera; Agrawal, Anurag A. (University of Chicago Press, 2012-06-19)
      The extent of convergent molecular evolution is largely unknown, yet is critical to understanding the genetics of adaptation. Target site insensitivity to cardenolides is a prime candidate for studying molecular convergence ...
    • Community-wide impacts of herbivore-induced plant responses in milkweed (Asclepias syriaca) 

      Van Sandt, Peter A.; Agrawal, Anurag A. (Ecological Society of America, 2004-09-01)
      The effects of early?season herbivory and subsequent induced plant responses have the potential to affect the diversity of herbivorous insect communities. We investigated the seasonal development of the herbivore fauna on ...
    • Consequences of toxic secondary compounds in nectar for mutualist bees and antagonist butterflies 

      Jones, Patricia L.; Agrawal, Anurag A. (Ecological Society of America, 2016-06-06)
      Attraction of mutualists and defense against antagonists are critical challenges for most organisms and can be especially acute for plants with pollinating and non?pollinating flower visitors. Secondary compounds in flowers ...
    • Coupled biogeochemical cycles: eutrophication and hypoxia in temperate estuaries and coastal marine ecosystems 

      Howarth, R. W.; Chan, F.; Conley, D. J.; Garnier, J.; Doney, S. C.; Marino, R. M.; Billen, G. (Wiley, 2011-02-01)
      Nutrient fluxes to coastal areas have risen in recent decades, leading to widespread hypoxia and other ecological damage, particularly from nitrogen (N). Several factors make N more limiting in estuaries and coastal waters ...
    • Cryptic population dynamics: rapid evolution masks trophic interactions 

      Yoshida, Takehito; Ellner, Stephen P; Jones, Laura E; Bohannan, Brendan J. M; Lenski, Richard E; Hairston, Nelson G., Jr. (Public Library of Science (PLOS), 2007-09)
      Trophic relationships, such as those between predator and prey or between pathogen and host, are key interactions linking species in ecological food webs. The structure of these links and their strengths have major ...
    • Cyanobacteria facilitate parasite epidemics in Daphnia 

      Tellenbach, C.; Tardent, N.; Pomati, F.; Keller, B.; Hairston, Nelson G., Jr.; Wolinska, J.; Spaak, P. (Ecological Society of America, 2016-12)
      The seasonal dominance of cyanobacteria in the phytoplankton community of lake ecosystems can have severe implications for higher trophic levels. For herbivorous zooplankton such as Daphnia, cyanobacteria have poor nutritional ...
    • Data from: Consumer-resource dynamics is an eco-evolutionary process in a natural plankton community 

      Schaffner, Lindsay; Govaert, Lynn; De Meester, Luc; Ellner, Stephen; Fairchild, Eliza; Miner, Brooks; Rudstam, Lars; Spaak, Piet; Hairston, Nelson (2019)
      For an important consumer-resource interaction in a natural lake (Oneida Lake, New York State) in 2015, the ecological process of grazer population growth rate was a function of both evolutionary changing mean resistance ...
    • Data from: Developmental temperature predicts the adult response to stressors in a free-living passerine 

      Uehling, Jennifer J; Taff, Conor C; Winkler, David W; Vitousek, Maren N (2019)
      Early life conditions can have substantial effects on the ways animals respond to stressors as adults. In particular, thermal conditions during development affect juveniles’ responses to stressors, and there is evidence ...
    • Deer Browsing Delays Succession by Altering Aboveground Vegetation and Belowground Seed Banks 

      DiTommaso, Antonio; Morris, Scott H.; Parker, John D.; Cone, Caitlin L.; Agrawal, Anurag A. (PLOS, 2014-03-07)
      Soil seed bank composition is important to the recovery of natural and semi-natural areas from disturbance and serves as a safeguard against environmental catastrophe. White-tailed deer (Odocoileus virginianus) populations ...
    • Defense mutualisms enhance plant diversification 

      Weber, Marjorie G.; Agrawal, Anurag A. (National Academy of Sciences, 2014-09-22)
      The ability of plants to form mutualistic relationships with animal defenders has long been suspected to influence their evolutionary success, both by decreasing extinction risk and by increasing opportunity for speciation ...
    • Direct and interactive effects of enemies and mutualists on plant performance: A meta-analysis 

      Morris, William F.; Hufbauer, Ruth A.; Agrawal, Anurag A.; Bever, James D.; Borowicz, Victoria A.; Gilbert, Gregory S.; Maron, John L.; Mitchell, Charles E.; Parker, Ingrid M.; Power, Alison G.; Torchin, Mark E.; Vazquez, Diego P. (Ecological Society of America, 2007-04-01)
      Plants engage in multiple, simultaneous interactions with other species; some (enemies) reduce and others (mutualists) enhance plant performance. Moreover, effects of different species may not be independent of one another; ...
    • Divergent evolutionary processes associated with colonization of offshore islands 

      Martínková, Natália; Barnett, Ross; Cucchi, Thomas; Struchen, Rahel; Pascal, Marine; Pascal, Michel; Fischer, Martin C.; Higham, Thomas; Brace, Selina; Ho, Simon Y. W.; Quéré, Jean-Pierre; O'Higgins, Paul; Excoffier, Laurent; Heckel, Gerald; Hoelzel, A. Rus; Dobney, Keith M.; Searle, J.B. (Wiley, 2013-10-10)
      Oceanic islands have been a test ground for evolutionary theory, but here, we focus on the possibilities for evolutionary study created by offshore islands. These can be colonized through various means and by a wide range ...
    • Do plant defenses predict damage by an invasive herbivore? A comparative study of the viburnum leaf beetle 

      Desurmont, Gaylord A.; Agrawal, Anurag A. (Ecological Society of America, 2014-06-01)
      The impact of plant defenses on insect herbivores is widely accepted, but their relative effects on oviposition choice, survival, and larval growth in preventing pest damage, especially for invasive insects, is not fully ...
    • Does food web complexity eliminate trophic-level dynamics? 

      Hairston, Nelson G., Jr.; Hairston, Nelson G., Sr. (University of Chicago, 1997-05)
    • Dual mechanism of chromatin remodeling in the common shrew sex trivalent (XY1Y2) 

      Matveevsky, S.N.; Pavlova, S.V.; Atsaeva, M.M.; Searle, J.B.; Kolomiets, O.L. (Pensoft Publishers, 2017-11-03)
      Here we focus on the XY1Y2 condition in male common shrew Sorex araneus Linnaeus, 1758, applying electron microscopy and immunocytochemistry for a comprehensive analysis of structure, synapsis and behaviour of the sex ...