![]() J Geophys Res Biogeosci 123:3178–3192Ĭraven D, Braden D, Ashton MS, Berlyn GP, Wishnie M, Dent D (2007) Between and within-site comparisons of structural and physiological characteristics and foliar nutrient content of 14 tree species at a wet, fertile site and a dry, infertile site in Panama. Ecol Lett 14:939–947Ĭobley LAE, Pataki DE, McCarthy HR, Martin SA, Ehleringer JR (2018) Housing age and affluence influence plant and soil nitrogen and carbon cycles in two semiarid cities. For Ecol Manage 259:477–486Ĭleveland CC, Townsend AR, Taylor P, Alvarez-Clare S, Bustamante MMC, Chuyong G, Dobrowski SZ, Grierson P, Harms KE, Houlton BZ, Marklein A, Parton W, Porder S, Reed SC, Sierra CA, Silver WL, Tanner EVJ, Wieder WR (2011) Relationships among net primary productivity, nutrients and climate in tropical rain forest: a pan-tropical analysis. Ecosystems 8:568–582Ĭhen FS, Fahey TJ, Yu MY, Gan L (2010) Key nitrogen cycling processes in pine plantations along a short urban-rural gradient in Nanchang, China. Biogeosciences 11:763–778Ĭarreiro MM, Tripler CE (2005) Forest remnants along urban-rural gradients: examining their potential for global change research. Environ Sci Technol 41:1331–1338Ĭaldararu S, Purves DW, Palmer PI (2014) Phenology as a strategy for carbon optimality: a global model. Plant Soil 373:553–568īukata AR, Kyser TK (2007) Carbon and nitrogen isotope variations in tree-rings as records of perturbations in regional carbon and nitrogen cycles. Environ Pollut 109:119–129īui EN, Henderson BL (2013) C:N:P stoichiometry in Australian soils with respect to vegetation and environmental factors. More work is needed on foliar C/N in trees at cities in polar regions and the Southern Hemisphere.Īlfani A, Baldantoni D, Maisto G, Bartoli G, De Santo AV (2000) Temporal and spatial variation in C, N, S and trace element contents in the leaves of Quercus ilex within the urban area of Naples. The change in foliar N concentration was globally the main force driving of the differences in foliar C/N for most tree species in urban forests. Therefore, urbanization has not caused a significant response in forest trees for foliar C/N. Myrsine guianensis (Primulaceae) and Myconia fallax (Asteraceae) had the highest foliar C/N. ![]() For variation by taxonomic classification, C 4 species Amaranthus retroflexus and Chenopodium ambrosoides (Amaranthaceae) had lower foliar C/N than did other species and families. ![]() Neither the foliar C concentration nor foliar C/N for trees of urban forests was statistically higher than those of rural forests. The foliar C/N of urban forest trees varied among different climate zones and tree taxonomic variation and tended to be higher in trees of urban forests near the equator and in eastern regions, mainly driven by lowered foliar N concentration. In this study, data on tree-leaf C and N stoichiometry were collected in papers from across 105 tree species from 82 genera and 46 families. Foliar C/N stoichiometry is an indicator of geochemical cycling in forest ecosystems, but the driving changes for its response to urbanization at the wide scale is not clear.
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