title: Foliar nutrient dynamics and foliar resorption in Quercus brantii lindley along an elevational gradient.
abstract: Foliar mass per area (mg dm(-2)) -based nitrogen and phosphorus concentrations, specific leaf mass (mg dm(-2)) and absolute and proportional resorption in Quercus brantii was investigated along a topographic gradient from 450 to 850 m altitude. Foliar N and P concentrations in Q. brantii exhibited significant differences with respect to topographic position and sampling dates in all of the studied parameters. A sharp decrease was observed from April to September in terms of Specific Leaf Mass (SLM) values. However, mass per area-based absolute and proportional N resorption was lowest at 450 m, while absolute and proportional P resorption was lowest at 850 m. Significant correlations were found between mass per area-based leaf nutrient concentration and foliar resorption except for the correlations between absolute P resorption and foliar P concentrations at 450, 650 and 750 m during full-leaf expansion and 850 m during senescence, respectively.
authors.affiliation: Department of Biology, Faculty of Arts and Sciences, University of Ondokuz Mayis, 55139, Kurupelit-Samsun, Turkey.
authors.forename: Ertuğrul
authors.initials: E
authors.lastname: Aksekili
authors.forename: Dudu Duygu
authors.initials: DD
authors.lastname: Kilic
authors.forename: Hamdi Güray
authors.initials: HG
authors.lastname: Kutbay
mesh_terms: D000042:Absorption; D000383:Agriculture / Q000379:methods; D000531:Altitude; D017753:Ecosystem; D008954:Models, Biological; D009584:Nitrogen / Q000737:chemistry*; D009586:Nitrogen Fixation; D010758:Phosphorus / Q000032:analysis* / Q000737:chemistry*; D018515:Plant Leaves / Q000378:metabolism*; D018521:Plant Physiological Phenomena; D029963:Quercus / Q000378:metabolism* / Q000502:physiology*
chemical_list: D010758:Phosphorus; D009584:Nitrogen