Now showing items 96-115 of 130

    • Plant chemical defense indirectly mediates aphid performance via interactions with tending ants 

      Zust, Tobias; Agrawal, Anurag A. (Ecological Society of America, 2017-01-06)
      The benefits of mutualistic interactions are often highly context dependent. We studied the interaction between the milkweed aphid Aphis asclepiadis and a tending ant, Formica podzolica. Although this interaction is generally ...
    • Plant genotype and environment interact to shape a diverse arthropod community on evening primrose (Oenothera biennis) 

      Johnson, Mark T.; Agrawal, Anurag A. (Ecological Society of America, 2005-04-01)
      Both an individual's genotype and environment govern its phenotype, and this phenotype may have extended consequences for species interactions and communities. We examined the importance of plant genotype and environmental ...
    • Plant Genotype Shapes Ant-Aphid Interactions: Implications for Community Structure and Indirect Plant Defense 

      Mooney, Kailen A.; Agrawal, Anurag A. (University of Chicago Press, 2008-04-15)
      Little is known about the mechanisms by which plant genotype shapes arthropod community structure. In a field experiment, we measured the effects of milkweed (Asclepias syriaca) genotype and ants on milkweed arthropods. ...
    • Playing Hide-and-Seek in Beta-Globin Genes: Gene Conversion Transferring a Beneficial Mutation between Differentially Expressed Gene Duplicates 

      Strážnická, Michaela; Marková, Silvia; Searle, J. B.; Kotlík, Petr (Multidisciplinary Digital Publishing Institute (MDPI), 2018-10-12)
      Increasing evidence suggests that adaptation to diverse environments often involves selection on existing variation rather than new mutations. A previous study identified a nonsynonymous single nucleotide polymorphism (SNP) ...
    • Prey evolution on the time scale of predator-prey dynamics revealed by allele-specific quantitative PCR 

      Meyer, J. R.; Ellner, S. P.; Hairston, Nelson G., Jr.; Jones, L. E.; Yoshida, T. (National Academy of Sciences, 2006-07-11)
      Using rotifer-algal microcosms, we tracked rapid evolution resulting from temporally changing natural selection in ecological predator-prey dynamics. We previously demonstrated that predator-prey oscillations in rotifer-algal ...
    • R2d2 Drives Selfish Sweeps in the House Mouse 

      Didion, John P.; Morgan, Andrew P.; Yadgary, Liran; Bell, Timothy A.; McMullan, Rachel C.; Ortiz de Solorzano, Lydia; Britton-Davidian, Janice; Bult, Carol J.; Campbell, Karl J.; Castiglia, Riccardo; Ching, Yung-Hao; Chunco, Amanda J.; Crowley, James J.; Chesler, Elissa J.; Förster, Daniel W.; French, John E.; Gabriel, Sofia I.; Gatti, Daniel M.; Garland, Theodore; Giagia-Athanasopoulou, Eva B.; Giménez, Mabel D.; Grize, Sofia A.; Gündüz, ?slam; Holmes, Andrew; Hauffe, Heidi C.; Herman, Jeremy S.; Holt, James M.; Hua, Kunjie; Jolley, Wesley J.; Lindholm, Anna K.; López-Fuster, María J.; Mitsainas, George; da Luz Mathias, Maria; McMillan, Leonard; da Graça Morgado Ramalhinho, Maria; Rehermann, Barbara; Rosshart, Stephan P.; Searle, J. B.; Shiao, Meng-Shin; Solano, Emanuela; Svenson, Karen L.; Thomas-Laemont, Patricia; Threadgill, David W.; Ventura, Jacint; Weinstock, George M.; Pomp, Daniel; Churchill, Gary A.; Pardo-Manuel de Villena, Fernando (Oxford University Press on behalf of the Society for Molecular Biology and Evolution, 2016-02-15)
      A selective sweep is the result of strong positive selection driving newly occurring or standing genetic variants to fixation, and can dramatically alter the pattern and distribution of allelic diversity in a population. ...
    • Rapid evolution of a life-history trait 

      Hairston, Nelson G., Jr.; Walton, W. E. (National Academy of Sciences, 1986-07)
      The copepod Diaptomus sanguineus begins diapause in permanent ponds in late March as an adaptation to avoid summer fish predation. During a study of copepod populations in two Rhode Island ponds, a severe drought dried one ...
    • Reconstructing Asian faunal introductions to eastern Africa from multi-proxy biomolecular and archaeological datasets 

      Prendergast, M.E.; Buckley, M.; Crowther, A.; Eager, H.; Frantz, L.; Lebrasseur, O.; Hutterer, R.; Hulme-Beaman, A.; Van Neer, W.; Douka, K.; Veall, M.-A.; Quintana Morales, E.M.; Schuenemann, V.J.; Reiter, E.; Allen, R.; Helm, R.; Shipton, C.; Mwebi, O.; Denys, C.; Horton, M.; Wynne-Jones, S.; Fleisher, J.; Radimilahy, C.; Wright, H.; Searle, J.B.; Krause, J.; Larson, G.; Boivin, N.L. (Public Library of Science, 2017-08)
      Human-mediated biological exchange has had global social and ecological impacts. In sub-Saharan Africa, several domestic and commensal animals were introduced from Asia in the pre-modern period; however, the timing and ...
    • Relatedness predicts phenotypic plasticity in plants better than weediness 

      Cook-Patton, Susan C.; Agrawal, Anurag A. (Evolutionary Ecology, 2011)
      Background: Weedy non-native species have long been predicted to be more phenotypically plastic than native species. Question: Are weedy non-native species more plastic than natives? Organisms: Fourteen perennial plant ...
    • Relative Selectivity of Plant Cardenolides for Na+/K+-ATPases From the Monarch Butterfly and Non-resistant Insects 

      Petschenka, G.; Fei, C. S.; Araya, J. J.; Schröder, S.; Timmermann, B. N.; Agrawal, Anurag A. (Frontiers Media, 2018-09-28)
      A major prediction of coevolutionary theory is that plants may target particular herbivores with secondary compounds that are selectively defensive. The highly specialized monarch butterfly (Danaus plexippus) copes well ...
    • Resistance and susceptibility of milkweed: competition, root herbivory, and plant genetic variation 

      Agrawal, Anurag A. (Ecological Society of America, 2004-08-01)
      Beetles in the genus Tetraopes share a long evolutionary history with milkweeds (Asclepias spp.), feeding on roots as larvae and leaves as adults. Despite their extreme specialization on milkweed, Tetraopes require drying ...
    • Riverine nitrogen export from the continents to the coasts 

      Boyer, E. W.; Howarth, R. W.; Galloway, J.; Dentener, F. J.; Green, P. A.; Vorosmarty, C. A. (Wiley, 2006-03-02)
      We present an overview of riverine nitrogen flux calculations that were prepared for the International Nitrogen Initiative's current global assessment of nitrogen cycles: past, present, and future (Galloway et al., 2004). ...
    • Role of overlapping generations in maintaining genetic variation in a fluctuating environment 

      Ellner, Stephen; Hairston, Nelson G., Jr. (University of Chicago, 1994-03)
      Population genetics theory suggests that temporally fluctuating selection on pheno- types can act to maintain genetic variance only under very restrictive conditions. However, this conclusion is based on models with discrete ...
    • Salicylate-mediated interactions between pathogens and herbivores 

      Thaler, Jennifer S.; Agrawal, Anurag A.; Halitschke, Rayko (Ecological Society of America, 2010-01-01)
      Plants employ hormone?mediated signaling pathways to defend against pathogens and insects. We tested predictions about the relative effect of jasmonate and salicylate pathways and how they mediate interactions between ...
    • Shifts in plant–microbe interactions over community succession and their effects on plant resistance to herbivores 

      Howard, Mia; Kao-Kniffin, Jenny; Kessler, Andre (New Phytologist, 2020)
      Soil microorganisms can influence the development of complex plant phenotypes, including resistance to herbivores. This microbiome-mediated plasticity may be particularly important for plant species that persist in ...
    • Species-specific Daphnia phenotypes: a history of industrial pollution and pelagic ecosystem response 

      Hairston, Nelson G., Jr.; Kearns, Colleen M.; Perry Demma, Linda; Effler, Steven W. (Ecological Society of America, 2005-07)
      Phenotypic differences among species, even closely related species, may translate into distinct effects on ecosystem dynamics. In lakes, the generalist grazer genus Daphnia often has marked effects on the abundance of ...
    • Spillover of a biological control agent (Chrysolina quadrigemina) onto native St. Johnswort (Hypericum punctatum) 

      Tingle, Jessica L.; Cook-Patton, Susan C.; Agrawal, Anurag A. (PeerJ, 2016-03-31)
      Biological control agents may have unintended effects on native biota, particularly species that are closely related to the target invader. Here, we explored how Chrysolina quadrigemina, a beetle introduced to control the ...
    • Staggered chromosomal hybrid zones in the house mouse: relevance to reticulate evolution and speciation 

      Gündüz, ?.; Pollock, C.L.; Giménez, M.D.; Förster, D.W.; White, T.A.; Sans-Fuentes, M.A.; Hauffe, H.C.; Ventura, J.; López-Fuster, M.J.; Searle, J.B. (Multidisciplinary Digital Publishing Insitute (MDPI), 2010-09)
      In the house mouse there are numerous chromosomal races distinguished by different combinations of metacentric chromosomes. These may come into contact with each other and with the ancestral all-acrocentric race, and form ...
    • Sulfur and carbon isotopes as tracers of salt-marsh organic matter flow 

      Peterson, B.J.; Howarth, R. W.; Garritt, R.H. (Wiley, 1986-08-01)
      Stable isotopes of sulfur and carbon were used to trace the dominant flows of organic matter from producers to macroconsumers in Great Sippewissett Salt Marsh on Cape Cod. Spartina alterniflora and sulfur-oxidizing bacteria ...
    • Synchronous diversification of Sulawesi’s iconic artiodactyls driven by recent geological events 

      Frantz, Laurent A. F.; Rudzinski, Anna; Nugraha, Abang Mansyursyah Surya; Evin, Allowen; Burton, James; Hulme-Beaman, Ardern; Linderholm, Anna; Barnett, Ross; Vega, Rodrigo; Irving-Pease, Evan K.; Haile, James; Allen, Richard; Leus, Kristin; Shephard, Jill; Hillyer, Mia; Gillemot, Sarah; van den Hurk, Jeroen; Ogle, Sharron; Atofanei, Cristina; Thomas, Mark G.; Johansson, Friederike; Mustari, Abdul Haris; Williams, John; Mohamad, Kusdiantoro; Damayanti, Chandramaya Siska; Wiryadi, Ita Djuwita; Obbles, Dagmar; Mona, Stephano; Day, Hally; Yasin, Muhammad; Meker, Stefan; McGuire, Jimmy A.; Evans, Ben J.; von Rintelen, Thomas; Ho, Simon Y. W.; Searle, J. B.; Kitchener, Andrew C.; Macdonald, Alastair A.; Shaw, Darren J.; Hall, Robert; Galbusera, Peter; Larson, Greger (The Royal Society, 2018-04-11)
      The high degree of endemism on Sulawesi has previously been suggested to have vicariant origins, dating back to 40 Ma. Recent studies, however, suggest that much of Sulawesi's fauna assembled over the last 15 Myr. Here, ...