01506nas a2200481 4500008004100000245010400041210006900145300001200214490000800226100002700234700002700261700002700288700001700315700002200332700001700354700002400371700001900395700002100414700002500435700002300460700002500483700002900508700002000537700001900557700002200576700002000598700002000618700001800638700001800656700002600674700002700700700002600727700002000753700002300773700002600796700002200822700001600844700002100860700002300881700002000904700002400924856007600948 2023 eng d00aNutrient addition drives declines in grassland species richness primarily via enhanced species loss0 aNutrient addition drives declines in grassland species richness a552-5630 v1111 aMuehleisen, Andrew, J.1 aWatkins, Carmen, R. E.1 aAltmire, Gabriella, R.1 aShaw, Ashley1 aCase, Madelon, F.1 aAoyama, Lina1 aBrambila, Alejandro1 aReed, Paul, B.1 aLaForgia, Marina1 aBorer, Elizabeth, T.1 aSeabloom, Eric, W.1 aBakker, Jonathan, D.1 aAmillas, Carlos, Alberto1 aBiederman, Lori1 aChen, Qingqing1 aCleland, Elsa, E.1 aFay, Philip, A.1 aHagenah, Nicole1 aHarpole, Stan1 aHautier, Yann1 aHenning, Jeremiah, A.1 aKnops, Johannes, M. H.1 aKomatsu, Kimberly, J.1 aLadouceur, Emma1 aMacDougall, Andrew1 aMcCulley, Rebecca, L.1 aMoore, Joslin, L.1 aOhlert, Tim1 aPower, Sally, A.1 aStevens, Carly, J.1 aWilfahrt, Peter1 aHallett, Lauren, M. uhttps://besjournals.onlinelibrary.wiley.com/doi/10.1111/1365-2745.1403803564nas a2200601 4500008004100000245012300041210006900164300001600233490000700249520175600256653002402012653001802036653001302054653002102067653002302088653002102111100002202132700001902154700002602173700002502199700002802224700001402252700002502266700002302291700002202314700001602336700001902352700002002371700002302391700002002414700002102434700001802455700002202473700002702495700001902522700002002541700002602561700002802587700002302615700002602638700002502664700002202689700002402711700002102735700002102756700002002777700001902797700002102816700001902837700001602856700002302872856006702895 2019 eng d00aBelowground biomass response to nutrient enrichment depends on light limitation across globally distributed grasslands0 aBelowground biomass response to nutrient enrichment depends on l a1466–14770 v223 a
Anthropogenic activities are increasing nutrient inputs to ecosystems worldwide, with consequences for global carbon and nutrient cycles. Recent meta-analyses show that aboveground primary production is often co-limited by multiple nutrients; however, little is known about how root production responds to changes in nutrient availability. At twenty-nine grassland sites on four continents, we quantified shallow root biomass responses to nitrogen (N), phosphorus (P) and potassium plus micronutrient enrichment and compared below- and aboveground responses. We hypothesized that optimal allocation theory would predict context dependence in root biomass responses to nutrient enrichment, given variation among sites in the resources limiting to plant growth (specifically light versus nutrients). Consistent with the predictions of optimal allocation theory, the proportion of total biomass belowground declined with N or P addition, due to increased biomass aboveground (for N and P) and decreased biomass belowground (N, particularly in sites with low canopy light penetration). Absolute root biomass increased with N addition where light was abundant at the soil surface, but declined in sites where the grassland canopy intercepted a large proportion of incoming light. These results demonstrate that belowground responses to changes in resource supply can differ strongly from aboveground responses, which could significantly modify predictions of future rates of nutrient cycling and carbon sequestration. Our results also highlight how optimal allocation theory developed for individual plants may help predict belowground biomass responses to nutrient enrichment at the ecosystem scale across wide climatic and environmental gradients.
10abelowground biomass10aFertilization10anitrogen10aNutrient Network10aoptimal allocation10aphosphorus roots1 aCleland, Elsa, E.1 aLind, Eric, M.1 aDeCrappeo, Nicole, M.1 aDeLorenze, Elizabeth1 aWilkins, Rachel, Abbott1 aAdler, P.1 aBakker, Jonathan, D.1 aBrown, Cynthia, S.1 aDavies, Kendi, F.1 aEsch, Ellen1 aFirn, Jennifer1 aGressard, Scott1 aGruner, Daniel, S.1 aHagenah, Nicole1 aHarpole, Stanley1 aHautier, Yann1 aHobbie, Sarah, E.1 aHofmockel, Kirsten, S.1 aKirkman, Kevin1 aKnops, Johannes1 aKopp, Christopher, W.1 aLa Pierre, Kimberly, J.1 aMacDougall, Andrew1 aMcCulley, Rebecca, L.1 aMelbourne, Brett, A.1 aMoore, Joslin, L.1 aProber, Suzanne, M.1 aRiggs, Charlotte1 aRisch, Anita, C.1 aSchuetz, Martin1 aStevens, Carly1 aWragg, Peter, D.1 aWright, Justin1 aBorer, E.T.1 aSeabloom, Eric, W. uhttps://link.springer.com/article/10.1007%2Fs10021-019-00350-402638nas a2200493 4500008004100000245011700041210006900158300001500227490000700242520117100249100002101420700001601441700002101457700001901478700002301497700001401520700001601534700002501550700001701575700002001592700001801612700002201630700002401652700002001676700001901696700002001715700001801735700002001753700002701773700002601800700002301826700002201849700001701871700002101888700002801909700002101937700002001958700001601978700002301994700001902017700002302036700002302059856006202082 2018 eng d00aSpatial heterogeneity in species composition constrains plant community responses to herbivory and fertilisation0 aSpatial heterogeneity in species composition constrains plant co a1364 -13710 v213 aEnvironmental change can result in substantial shifts in community composition. The associated immigration and extinction events are likely constrained by the spatial distribution of species. Still, studies on environmental change typically quantify biotic responses at single spatial (time series within a single plot) or temporal (spatial beta diversity at single time points) scales, ignoring their potential interdependence. Here, we use data from a global network of grassland experiments to determine how turnover responses to two major forms of environmental change – fertilisation and herbivore loss – are affected by species pool size and spatial compositional heterogeneity. Fertilisation led to higher rates of local extinction, whereas turnover in herbivore exclusion plots was driven by species replacement. Overall, sites with more spatially heterogeneous composition showed significantly higher rates of annual turnover, independent of species pool size and treatment. Taking into account spatial biodiversity aspects will therefore improve our understanding of consequences of global and anthropogenic change on community dynamics.
1 aHodapp, Dorothee1 aBorer, E.T.1 aHarpole, Stanley1 aLind, Eric, M.1 aSeabloom, Eric, W.1 aAdler, P.1 aAlberti, J.1 aArnillas, Carlos, A.1 aBakker, J.D.1 aBiederman, L.A.1 aCadotte, Marc1 aCleland, Elsa, E.1 aCollins, Scott., L.1 aFay, Philip, A.1 aFirn, Jennifer1 aHagenah, Nicole1 aHautier, Yann1 aIribarne, Oscar1 aKnops, Johannes, M. H.1 aMcCulley, Rebecca, L.1 aMacDougall, Andrew1 aMoore, Joslin, L.1 aMorgan, J.W.1 aMortensen, Brent1 aLa Pierre, Kimberly, J.1 aRisch, Anita, C.1 aSchütz, Martin1 aPeri, Pablo1 aStevens, Carly, J.1 aWright, Justin1 aHillebrand, Helmut1 aGurevitch, Jessica uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111/ele.13102