NDLI: Nutrient and Carbon Limitation on Decomposition in an Amazonian Moist Forest

Content Provider	Springer Nature Link
Author	Barantal, Sandra Schimann, Heidy Fromin, Nathalie Hättenschwiler, Stephan
Copyright Year	2012
Abstract	Tropical forests determine global biogeochemical cycles to a large extent, but control factors for key ecosystem processes such as decomposition remain poorly understood. With a full-factorial C (cellulose), N (urea), and P (phosphate) fertilization experiment, we tested the relative importance of C and nutrient limitation on litter decomposition in a mature lowland moist forest of French Guiana. Despite the previously demonstrated litter C quality control over decomposition and the very low soil P content (0.1 mg g−1 of soil) at our study site, fertilization with C or P alone did not increase the decomposition of a wide range of litter types (N:P ratios between 20 and 80). Nitrogen fertilization alone also had no effect on decomposition. However, the combined fertilization with N and P resulted in up to 33.5% more initial litter mass lost, with an increasing effect with wider litter N:P ratios. Soil fauna strongly stimulated litter mass loss and enhanced nutrient fertilization effects. Moreover, nutrient effects on decomposition increased with additional C fertilization in the presence of fauna. Our results suggest that increased N availability is required for a positive P effect on decomposition in the studied P-poor tropical forest. Further stimulation of decomposition by C amendment through priming indicates energy limitation of decomposers that is co-determined by nutrient availability. The demonstrated intricate control of the key resources C, N, and P on decomposition calls for an intensified research effort on multiple resource limitation on key processes in tropical forests and how they change under multiple human impacts.
Starting Page	1039
Ending Page	1052
Page Count	14
File Format	PDF
ISSN	14329840
Journal	Ecosystems
Volume Number	15
Issue Number	7
e-ISSN	14350629
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-06-26
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	litter quality phosphorus nitrogen labile carbon priming effect soil fauna energy limitation tropical forest Environmental Management Ecology Nature Conservation Geoecology/Natural Processes Plant Sciences Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics

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