Abstract
Large herbivores are a major agent in ecosystems, influencing vegetation structure, and carbon and nutrient flows. During the last glacial period, a mammoth steppe ecosystem prevailed in the unglaciated northern lands, supporting a high diversity and density of megafaunal herbivores. The apparent discrepancy between abundant megafauna and the expected low vegetation productivity under a generally harsher climate with a lower CO2 concentration, termed the productivity paradox, requires large-scale quantitative analysis using process-based ecosystem models. However, most of the current global dynamic vegetation models (DGVMs) lack explicit representation of large herbivores. Here we incorporated a grazing module in a DGVM based on physiological and demographic equations for wild large grazers, taking into account feedbacks of large grazers on vegetation. The model was applied globally for present-day and the Last Glacial Maximum (LGM). The present-day results of potential grazer biomass, combined with an empirical land-use map, infer a reduction in wild grazer biomass by 79-93% owing to anthropogenic land replacement of natural grasslands. For the LGM, we find that the larger mean body size of mammalian herbivores than today is t...Continue Reading
References
May 23, 1998·Science·J Alroy
Jan 6, 2001·Science·E MonninJ M Barnola
Oct 2, 2004·Science·Anthony D BarnoskyAlan B Shabel
May 29, 2007·Conservation Biology : the Journal of the Society for Conservation Biology·A R E SinclairSimon Thirgood
Jul 24, 2007·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Marcus ClaussJürgen Hummel
Oct 10, 2007·Ecology Letters·James J ElserJennifer E Smith
Mar 5, 2009·Proceedings of the National Academy of Sciences of the United States of America·Gregory P AsnerRoberta E Martin
Aug 8, 2009·Science·Peter U ClarkA Marshall McCabe
Nov 17, 2009·The Journal of Sexual Medicine·Anne A Lawrence
Dec 8, 2009·Science·Jacquelyn L GillGuy S Robinson
Sep 16, 2010·The New Phytologist·Laci M Gerhart, Joy K Ward
Nov 27, 2010·Science·Felisa A SmithMark D Uhen
Nov 4, 2011·Nature·Eline D LorenzenEske Willerslev
Mar 24, 2012·Science·Susan RuleChristopher N Johnson
Jun 5, 2013·Proceedings of the National Academy of Sciences of the United States of America·Fridolin KrausmannTimothy D Searchinger
Feb 7, 2014·Nature·Eske WillerslevPierre Taberlet
Mar 22, 2014·The New Phytologist·Jacquelyn L Gill
Jun 6, 2014·Proceedings. Biological Sciences·Christopher SandomJens-Christian Svenning
Apr 8, 2015·Proceedings of the National Academy of Sciences of the United States of America·Joanna BakerChris Venditti
Jun 3, 2015·Proceedings of the National Academy of Sciences of the United States of America·Tyler R KartzinelRobert M Pringle
Sep 5, 2015·Science·Ian A HattonMichel Loreau
Nov 26, 2015·Science Advances·William J RippleBlaire Van Valkenburgh
Nov 28, 2015·Science·Gareth P HempsonWilliam J Bond
Apr 1, 2000·Oecologia·D A FrankB F Tracy
Jun 1, 1990·Oecologia·H H T Prins, I Douglas-Hamilton
Mar 1, 1992·Oecologia·A W Illius, I J Gordon
Nov 1, 1993·Oecologia·Douglas A Frank, Samuel J McNaughton
Citations
Oct 24, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Christopher N JohnsonDavid M J S Bowman
Nov 29, 2020·Nature Communications·E T BorerE W Seabloom
Jan 22, 2021·Scientific Data·Erick J LundgrenJens-Christian Svenning
Jul 10, 2021·Nature Communications·Manuel WillAndrea Manica
Aug 26, 2021·Nature Communications·Robert M BeyerAndrea Manica
Sep 11, 2021·Nature Ecology & Evolution·Dan ZhuPhilippe Ciais
Oct 8, 2021·Scientific Reports·Julia V TejadaBrian N Popp