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Diversity increases carbon storage and tree productivity in Spanish forests

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http://pubman.mpdl.mpg.de/cone/persons/resource/persons62433

Kattge,  Jens
Interdepartmental Max Planck Fellow Group Functional Biogeography, Max Planck Institute for Biogeochemistry, Max Planck Society;

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Ruiz-Benito, P., Gómez-Aparicio, L., Paquette, A., Messier, C., Kattge, J., & de Zavala, M. (2014). Diversity increases carbon storage and tree productivity in Spanish forests. Global Ecology and Biogeography, 23(3), 311-322. doi:10.1111/geb.12126.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0014-5578-7
Abstract
Aim Biodiversity loss could reduce primary productivity and carbon storage provided by forests; however the underpinning mechanisms of biodiversity effects on multiple ecosystem functions are not completely understood. Spanish forests are of particular interest because of the broad variation in environmental conditions and management history. We tested for the existence of a relationship among diversity effects and both carbon storage and tree productivity, and examined the relative importance of complementarity and selection mechanisms in a wide variety of forests, from cold deciduous Atlantic to xeric Mediterranean evergreen forests. Location Continental Spain. Methods We used c. 54,000 plots of the Spanish Forest Inventory and maximum likelihood techniques to quantify how climate, stand structure and diversity shape carbon storage and tree productivity. Diversity effects included both complementarity and selection mechanisms, measured respectively through functional diversity and functional identity measures. Results Diversity had a significant effect on both carbon storage and tree productivity, even when controlling for climatic and stand structural confounding factors. A consistent positive effect of functional diversity on carbon storage and tree productivity was observed in all seven forest types studied. This relationship was not linear, and the largest changes in carbon storage and tree productivity were observed at low functional diversity levels. However, the importance of complementarity effects was not consistent with the productivity of different forest types. Selection effects were particularly important in deciduous and Mediterranean pine forests, but had very little effect on mountain pines. Main conclusions We found a generally positive effect of diversity on carbon storage and tree productivity, supported by both complementarity and selection mechanisms. Thus, both functionally diverse forests and functionally important species should be maintained to adequately preserve and promote key ecosystem functions such as carbon storage and tree productivity. Keywords: climate, competition, community-weighted means of trait value, continental Spain, diversity, ecosystem functions and services, forest management, maximum likelihood techniques, national forest inventory.