02398nas a2200241 4500008004100000245010400041210006900145300001500214490000700229520165400236653003801890653001801928653001701946653001301963653002401976653001602000100001402016700001702030700001502047700001302062700001802075856006302093 2013 eng d00aSpatial connectedness of plant species: potential links for apparent competition via plant diseases0 aSpatial connectedness of plant species potential links for appar a1195 -14280 v623 a
This study evaluated the reactions of seven common C4 grasses of the tallgrass prairie of the USA Great Plains to the economically important wheat pathogens Pyrenophora tritici-repentis and Gaeumannomyces graminis var. tritici (Ggt) isolated from wheat. The P. tritici-repentis isolates (race 1) were pathogenic on all grasses tested, but symptom severity was markedly low. Three of the grass species inoculated with Ggt were highly susceptible, while four species exhibited no symptoms. Because measures of connectedness can provide a proxy for population processes, connectedness was evaluated within and among the seven grass species in representative tallgrass prairie environments for all potential pathogen-sharing patterns. Andropogon gerardii was ubiquitous, so all plant species were well connected to it. Andropogon scoparius (= Schizachyrium scoparium), Sorghastrum nutans and Panicum virgatum were fairly common but specialized to particular environments. Bouteloua curtipendula was uncommon but occurred in all environments, while Buchloë dactyloides and Bouteloua gracilis were uncommon and only occurred in upland sites. Co-occurrence of plant species was generally not reciprocal in that, for many species pairs, species A rarely occurred without potential exposure to inoculum from species B, while species B commonly occurred without species A. The three grass species susceptible to Ggt may act as sources of inoculum for each other within tallgrass prairie, with the potential to influence fitness, and tallgrass prairie and commercial wheat ecosystems in the Great Plains also have the potential to share both pathogens.
10aagriculture–wildlands interface10abiofuel crops10agraph theory10anetworks10apathogen spill-over10aswitchgrass1 aCox, C.M.1 aBockus, W.W.1 aHolt, R.D.1 aFang, L.1 aGarrett, K.A. uhttps://onlinelibrary.wiley.com/doi/full/10.1111/ppa.1204500619nas a2200157 4500008004100000245010300041210006900144260003100213300001300244100001800257700001400275700001600289700001600305700001500321856012500336 2008 eng d00aApplied biodiversity science: Managing emerging diseases in agriculture and linked natural systems0 aApplied biodiversity science Managing emerging diseases in agric bPrinceton University Press a368 -3861 aGarrett, K.A.1 aCox, C.M.1 aOstfeld, R.1 aKeesing, F.1 aEviner, V. uhttp://lter.konza.ksu.edu/content/applied-biodiversity-science-managing-emerging-diseases-agriculture-and-linked-natural00543nas a2200109 4500008004100000245011600041210006900157260004300226490002100269100001400290856012900304 2004 eng d00aCytogenetic characterization and disease resistance of perennial grasses and disease response to host diversity0 aCytogenetic characterization and disease resistance of perennial aManhattan, KSbKansas State University0 vPhD Dissertation1 aCox, C.M. uhttp://lter.konza.ksu.edu/content/cytogenetic-characterization-and-disease-resistance-perennial-grasses-and-disease-response