Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomes

Cornelissen Johannes, H.C.; van Bodegom, P.M.; Aerts, R.; Callaghan, T.V.; van Logtestijn Richard, S.P.; Alatalo, J.; Stuart, C.F.; Gerdol, R.; Gudmundsson, J.; Gwynn-Jones, D.; Hartley, A.E.; Hik, D.S.; Hofgaard, A.; Jonsdottir, I.S.; Karlsson, S.; Klein, J.A.; Laundre, J.; Magnusson, B.; Michelsen, A.; Molau, U.; Onipchenko, V.G.; Quested, H.M.; Sandvik, S.M.; Schmidt, I.K.; Shaver, G.R.; Solheim, B.; Soudzilovskaia, N.A.; Stenstrom, A.; Tolvanen, A.; Totland, O.; Wada, N.; Welker, J.M.; Zhao, X.

Авторы: Cornelissen Johannes H.C., van Bodegom Peter M., Aerts Rien, Callaghan Terry V., van Logtestijn Richard S.P., Alatalo Juha, Stuart Chapin F., Gerdol Renato, Gudmundsson Jon, Gwynn-Jones Dylan, Hartley Anne E., Hik David S., Hofgaard Annika, Jonsdottir Ingibjorg S., Karlsson Staffan, Klein Julia A., Laundre Jim, Magnusson Borgthor, Michelsen Anders, Molau Ulf, Onipchenko Vladimir G., Quested Helen M., Sandvik Sylvi M., Schmidt Inger K., Shaver Gus R., Solheim Bjorn, Soudzilovskaia Nadejda A., Stenstrom Anna, Tolvanen Anne, Totland Orjan, Wada Naoya, Welker Jeffrey M., Zhao Xinquan
Журнал: Ecology Letters
Том: 10
Номер: 7
Год издания: 2007
Издательство: Blackwell Publishing Inc.
Местоположение издательства: United Kingdom
Первая страница: 619
Последняя страница: 627
DOI: 10.1111/j.1461-0248.2007.01051.x
Аннотация: Whether climate change will turn cold biomes from large long-term carbon sinks into sources is hotly debated because of the great potential for ecosystem-mediated feedbacks to global climate. Critical are the direction, magnitude and generality of climate responses of plant litter decomposition. Here, we present the first quantitative analysis of the major climate-change-related drivers of litter decomposition rates in cold northern biomes worldwide. Leaf litters collected from the predominant species in 33 global change manipulation experiments in circum-arctic-alpine ecosystems were incubated simultaneously in two contrasting arctic life zones. We demonstrate that longer-term, large-scale changes to leaf litter decomposition will be driven primarily by both direct warming effects and concomitant shifts in plant growth form composition, with a much smaller role for changes in litter quality within species. Specifically, the ongoing warming-induced expansion of shrubs with recalcitrant leaf litter across cold biomes would constitute a negative feedback to global warming. Depending on the strength of other (previously reported) positive feedbacks of shrub expansion on soil carbon turnover, this may partly counteract direct warming enhancement of litter decomposition.
Добавил в систему: Онипченко Владимир Гертрудович

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Global negative vegetation feedback to climate warming responses of leaf litter decomposition rates in cold biomesстатья