uni-leipzig-open-access/json/geb.13664

{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,1,24]],"date-time":"2024-01-24T18:00:32Z","timestamp":1706119232325},"reference-count":92,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2023,4,4]],"date-time":"2023-04-04T00:00:00Z","timestamp":1680566400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001659","name":"Deutsche Forschungsgemeinschaft","doi-asserted-by":"publisher","award":["FZT 118, 202548816"]},{"DOI":"10.13039\/501100015742","name":"Swiss Federal Institute for Forest, Snow and Landscape Research","doi-asserted-by":"publisher"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Global Ecol Biogeogr"],"published-print":{"date-parts":[[2023,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>The microbial metabolic quotient (MMQ; mg CO<jats:sub>2<\/jats:sub>\u2010C\/mg MBC\/h), defined as the amount of microbial CO<jats:sub>2<\/jats:sub> respired (MR; mg CO<jats:sub>2<\/jats:sub>\u2010C\/kg soil\/h) per unit of microbial biomass C (MBC; mg C\/kg soil), is a key parameter for understanding the microbial regulation of the carbon (C) cycle, including soil C sequestration. Here, we experimentally tested hypotheses about the individual and interactive effects of multiple nutrient addition (nitrogen + phosphorus + potassium\u2009+\u2009micronutrients) and herbivore exclusion on MR, MBC and MMQ across 23 sites (five continents). Our sites encompassed a wide range of edaphoclimatic conditions; thus, we assessed which edaphoclimatic variables affected MMQ the most and how they interacted with our treatments.<\/jats:p><\/jats:sec><jats:sec><jats:title>Location<\/jats:title><jats:p>Australia, Asia, Europe, North\/South America.<\/jats:p><\/jats:sec><jats:sec><jats:title>Time period<\/jats:title><jats:p>2015\u20132016.<\/jats:p><\/jats:sec><jats:sec><jats:title>Major taxa<\/jats:title><jats:p>Soil microbes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Soils were collected from plots with established experimental treatments. MR was assessed in a 5\u2010week laboratory incubation without glucose addition, MBC via substrate\u2010induced respiration. MMQ was calculated as MR\/MBC and corrected for soil temperatures (MMQsoil). Using linear mixed effects models (LMMs) and structural equation models (SEMs), we analysed how edaphoclimatic characteristics and treatments interactively affected MMQsoil.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>MMQsoil was higher in locations with higher mean annual temperature, lower water holding capacity and lower soil organic C concentration, but did not respond to our treatments across sites as neither MR nor MBC changed. We attributed this relative homeostasis to our treatments to the modulating influence of edaphoclimatic variables. For example, herbivore exclusion, regardless of fertilization, led to greater MMQsoil only at sites with lower soil organic C (&lt;\u20091.7%).<\/jats:p><\/jats:sec><jats:sec><jats:title>Main conclusions<\/jats:title><jats:p>Our results pinpoint the main variables related to MMQsoil across grasslands and emphasize the importance of the local edaphoclimatic conditions in controlling the response of the C cycle to anthropogenic stressors. By testing hypotheses about MMQsoil across global edaphoclimatic gradients, this work also helps to align the conflicting results of prior studies.<\/jats:p><\/jats:sec>","DOI":"10.1111\/geb.13664","type":"journal-article","created":{"date-parts":[[2023,4,4]],"date-time":"2023-04-04T10:11:02Z","timestamp":1680603062000},"page":"904-918","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Drivers of the microbial metabolic quotient across global grasslands"],"prefix":"10.1111","volume":"32","author":[{"ORCID":"http:\/\/orcid.org\/0000-0003-0531-8336","authenticated-orcid":false,"given":"A. 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C.","family":"Caldeira","sequence":"additional","affiliation":[{"name":"Centro de Estudos Florestais, Instituto Superior de Agronomia Universidade de Lisboa  Lisbon Portugal"}]},{"given":"K. F.","family":"Davies","sequence":"additional","affiliation":[{"name":"Department of Ecology and Evolutionary Biology University of Colorado  Boulder Colorado USA"}]},{"ORCID":"http:\/\/orcid.org\/0000-0002-0371-6720","authenticated-orcid":false,"given":"N.","family":"Eisenhauer","sequence":"additional","affiliation":[{"name":"German Centre for Integrative Biodiversity Research (iDiv) Halle\u2010Jena\u2010Leipzig  Leipzig Germany"},{"name":"Institute of Biology Leipzig University  Leipzig Germany"}]},{"given":"A.","family":"Eskelinen","sequence":"additional","affiliation":[{"name":"German Centre for Integrative Biodiversity Research (iDiv) Halle\u2010Jena\u2010Leipzig  Leipzig Germany"},{"name":"Ecology and Genetics Unit University of Oulu  Oulu Finland"},{"name":"Department of Physiological Diversity Helmholtz Center for Environmental Research \u2013 UFZ  Leipzig Germany"}]},{"given":"P. A.","family":"Fay","sequence":"additional","affiliation":[{"name":"USDA ARS Grassland Soil and Water Research  Temple Texas USA"}]},{"given":"F.","family":"Hagedorn","sequence":"additional","affiliation":[{"name":"Swiss Federal Institute for Forest, Snow and Landscape Research  Birmensdorf Switzerland"}]},{"given":"J. M. H.","family":"Knops","sequence":"additional","affiliation":[{"name":"Department of Health and Environmental Sciences Xi\u00e1n Jiaotong\u2010Liverpool University  Suzhou China"}]},{"given":"J. J.","family":"Lembrechts","sequence":"additional","affiliation":[{"name":"Plants and Ecosystems (PLECO) University of Antwerp  Antwerp Belgium"}]},{"given":"A. S.","family":"MacDougall","sequence":"additional","affiliation":[{"name":"Department of Integrative Biology University of Guelph  Guelph Ontario Canada"}]},{"given":"R. L.","family":"McCulley","sequence":"additional","affiliation":[{"name":"Department of Plant and Soil Sciences University of Kentucky  Lexington Kentucky USA"}]},{"given":"B. A.","family":"Melbourne","sequence":"additional","affiliation":[{"name":"Department of Ecology and Evolutionary Biology University of Colorado  Boulder Colorado USA"}]},{"given":"J. L.","family":"Moore","sequence":"additional","affiliation":[{"name":"Arthur Rylah Institute for Environmental Research  Heidelberg Victoria Australia"},{"name":"School of Biological Sciences Monash University  Clayton Victoria Australia"}]},{"given":"S. A.","family":"Power","sequence":"additional","affiliation":[{"name":"Hawkesbury Institute for the Environment Western Sydney University  Penrith New South Wales Australia"}]},{"given":"E. W.","family":"Seabloom","sequence":"additional","affiliation":[{"name":"Department of Ecology, Evolution, and Behavior University of Minnesota  St. Paul Minnesota USA"}]},{"given":"M. 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