Shifting N and P concentrations and stoichiometry during autumn litterfall: Implications for ecosystem monitoring

TitleShifting N and P concentrations and stoichiometry during autumn litterfall: Implications for ecosystem monitoring
Publication TypeJournal Article
Year of Publication2019
AuthorsSee, CR, Yanai, RD, Fahey, TJ
JournalEcological Indicators
Volume103
Pagination488 - 492
Date Published2019/08/01/
ISBN Number1470-160X
KeywordsLeaf stoichiometry, Litterfall nutrient flux, N:P ratio, Nutrient resorption, Uncertainty
Abstract

Leaf litterfall nutrient concentrations and their ratios are a common indicator of site nutrient status and a critical component of many ecosystem calculations. Concentrations of nitrogen (N) and phosphorus (P) in leaf litter are related to foliar concentrations, but they are reduced by nutrient resorption during senescence. Although nutrient resorption occurs gradually during the autumn in winter-deciduous species, no study to date has assessed how the timing of litter collection affects estimates of nutrient concentration. To quantify the importance of this effect we analyzed the nutrient concentrations of leaf litter collected weekly in two northern hardwood sites at the Hubbard Brook Experimental Forest for three dominant tree species: Acer saccharum, Betula alleghaniensis, and Fagus grandifolia. Both N and P concentrations declined significantly during the litterfall season in all species (p 

URLhttp://www.sciencedirect.com/science/article/pii/S1470160X19302638
Short TitleEcological Indicators