NDLI: Unraveling the ecosystem functions in the Amazonia–Cerrado transition: evidence of hyperdynamic nutrient cycling

Content Provider	Springer Nature Link
Author	Oliveira, Bianca Marimon Junior, Ben Hur Mews, Henrique A. Valadão, Marco Bru X. Marimon, Beatriz S.
Copyright Year	2016
Abstract	The contact between savanna and forest in the Amazonia–Cerrado transition zone is characterized by the hyperdynamics of the vegetation (recruitment vs. mortality). However, the related nutrient dynamics under these conditions are not well understood. We determined for the first time the biogeochemical cycles of the vegetation in the zone of transition estimating the litterfall, nutrient input, decomposition rates, and nutrient release in cerradão and cerrado plots. We examine the hypothesis that nutrient cycling is strongly associated with the vegetation dynamics. The litterfall was sampled in 30 traps placed within 1-ha vegetation plots for 2 years. The release of nutrients from the litterfall back to the soil was also estimated using decomposition bags in the two areas. The decomposition rates did not vary between areas, although in the cerradão the input of total biomass (9.27 Mg ha$^{−1}$ year$^{−1}$) and total nutrients (219.17 kg ha$^{−1}$ year$^{−1}$), the decomposition of the total biomass, and the cycling of most nutrients through litterfall and decomposition were at least twice higher than in the cerrado. These results confirmed the hypothesis concerning the differences between vegetation types in nutrient cycling, suggesting for the first time that the hyperdynamics observed in both vegetations were also reflected in the biogeochemical cycle, particularly in the cerradão. Thus, it is likely that the rapid and effective cycling of nutrients observed in the cerradão might be a key condition guaranteeing the ability of the cerradão to colonize new areas previously occupied by the typical cerrado.
Starting Page	225
Ending Page	239
Page Count	15
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	218
Issue Number	2
e-ISSN	15735052
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-11-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nutrient cycling Leaf litter Cerrado Ecosystem functions Hyperdynamic Ecology Plant Ecology Community & Population Ecology Terrestial Ecology Applied Ecology Biodiversity
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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