Empirical support for the biogeochemical niche hypothesis in forest trees

Jordi Sardans, Helena Vallicrosa, Paolo Zuccarini, Gerard Farré-Armengol, Marcos Fernández-Martínez, Guille Peguero, Albert Gargallo-Garriga, Philippe Ciais, Ivan A. Janssens, Michael Obersteiner, Andreas Richter, Josep Peñuelas

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Resum

The possibility of using the elemental compositions of species as a tool to identify species/genotype niche remains to be tested at a global scale. We investigated relationships between the foliar elemental compositions (elementomes) of trees at a global scale with phylogeny, climate, N deposition and soil traits. We analysed foliar N, P, K, Ca, Mg and S concentrations in 23,962 trees of 227 species. Shared ancestry explained 60–94% of the total variance in foliar nutrient concentrations and ratios whereas current climate, atmospheric N deposition and soil type together explained 1–7%, consistent with the biogeochemical niche hypothesis which predicts that each species will have a specific need for and use of each bio-element. The remaining variance was explained by the avoidance of nutritional competition with other species and natural variability within species. The biogeochemical niche hypothesis is thus able to quantify species-specific tree niches and their shifts in response to environmental changes.

Idioma originalEnglish
Pàgines (de-a)184-194
Nombre de pàgines11
RevistaNature ecology & evolution
Volum5
Número2
DOIs
Estat de la publicacióPublicada - 4 de febr. 2021

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