NDLI: No Differences in Soil Carbon Stocks Across the Tree Line in the Peruvian Andes

Content Provider	Springer Nature Link
Author	Zimmermann, Michael Meir, Patrick Silman, Miles R. Fedders, Anna Gibbon, Adam Malhi, Yadvinder Urrego, Dunia H. Bush, Mark B. Feeley, Kenneth J. Garcia, Karina C. Dargie, Greta C. Farfan, Wiliam R. Goetz, Bradley P. Johnson, Wesley T. Kline, Krystle M. Modi, Andrew T. Rurau, Natividad M. Q. Staudt, Brian T. Zamora, Flor
Copyright Year	2009
Abstract	Reliable soil organic carbon (SOC) stock measurements of all major ecosystems are essential for predicting the influence of global warming on global soil carbon pools, but hardly any detailed soil survey data are available for tropical montane cloud forests (TMCF) and adjacent high elevation grasslands above (puna). TMCF are among the most threatened of ecosystems under current predicted global warming scenarios. We conducted an intensive soil sampling campaign extending 40 km along the tree line in the Peruvian Andes between 2994 and 3860 m asl to quantify SOC stocks of TMCF, puna grassland, and shrubland sites in the transition zone between the two habitats. SOC stocks from the soil surface down to the bedrock averaged (±standard error SE) 11.8 (±1.5, N = 24) kg C/m2 in TMCF, 14.7 (±1.4, N = 9) kg C/m2 in the shrublands and 11.9 (±0.8, N = 35) kg C/m2 in the grasslands and were not significantly different (P > 0.05 for all comparisons). However, soil profile analysis revealed distinct differences, with TMCF profiles showing a uniform SOC distribution with depth, shrublands a linear decrease, and puna sites an exponential decrease in SOC densities with soil depth. Organic soil layer thickness reached a maximum (~70 cm) at the upper limit of the TMCF and declined with increasing altitude toward puna sites. Within TMCF, no significant increase in SOC stocks with increasing altitude was observed, probably because of the large variations among SOC stocks at different sites, which in turn were correlated with spatial variation in soil depth.
Starting Page	62
Ending Page	74
Page Count	13
File Format	PDF
ISSN	14329840
Journal	Ecosystems
Volume Number	13
Issue Number	1
e-ISSN	14350629
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-11-14
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	soil carbon stocks tropical montane cloud forest puna tree line Nature Conservation Geoecology/Natural Processes Environmental Management Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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