5 documents found, page 1 of 1
Structural, physiognomic and above-ground biomass variation in savanna-forest t...
Veenendaal, Elmar M.; Torello-Raventos, Mireia; Feldpausch, Ted R.; null, Tomas; Gerard, France F.; Schrodt, Franziska; Saiz, GustavoThrough interpretations of remote-sensing data and/or theoretical propositions, the idea that forest and savanna represent "alternative stable states" is gaining increasing acceptance. Filling an observational gap, we present detailed stratified floristic and structural analyses for forest and savanna stands located mostly within zones of transition (where both vegetation types occur in close proximity) in Afri...
Basin-wide variations in foliar properties of Amazonian forest: Phylogeny, soil...
Fyllas, Nikolaos M.; Patiño, Sandra; Baker, Timothy R.; Nardoto, G. B.; Martinelli, Luiz Antônio; Quesada, Carlos Alberto; Paiva, Romilda Q.We analysed 1040 individual trees, located in 62 plots across the Amazon Basin for leaf mass per unit area (MA), foliar carbon isotopic composition (δ13C) and leaf level concentrations of C, N, P, Ca, Mg, K and Al. All trees were identified to the species level with the dataset containing 58 families, 236 genera and 508 species, distributed across a wide range of soil types and precipitation regimes. Some folia...
Variation in nitrogen use strategies and photosynthetic pathways among vascular...
Mardegan, Sílvia Fernanda; Nardoto, G. B.; Higuchi, Niro; Reinert, Fernanda; Martinelli, Luiz Antônio(Variation in nitrogen use strategies and photosynthetic pathways among vascular epiphytes in the Brazilian Central Amazon). The variation in nitrogen use strategies and photosynthetic pathways among vascular epiphyte families was addressed in a white-sand vegetation in the Brazilian Central Amazon. Foliar nitrogen and carbon concentrations and their isotopic composition (δ15N and δ13C, respectively) were measu...
Convergence of soil nitrogen isotopes across global climate gradients
Craine, Joseph Mitchell; Elmore, Andrew James; Wang, Lixin; Augusto, Laurent; Baisden, W. Troy; Brookshire, E. N.Jack; Cramer, Michael DenisQuantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems, and climate forcing. With limited direct measures of soil N cycling at the global scale, syntheses of the 15N:14N ratio of soil organic matter across climate gradients provide key insights into understanding global patterns of...
Edaphic, structural and physiological contrasts across Amazon Basin forest-sava...
Lloyd, Jon; null, Tomas; Schrodt, Franziska; Ishida, Francoise Yoko; Feldpausch, Ted R.; Saiz, Gustavo; Quesada, Carlos Alberto; Schwarz, MichaelSampling along a precipitation gradient in tropical South America extending from ca. 0.8 to 2.0 m ag-1, savanna soils had consistently lower exchangeable cation concentrations and higher C/N ratios than nearby forest plots. These soil differences were also reflected in canopy averaged leaf traits with savanna trees typically having higher leaf mass per unit area but lower mass-based nitrogen (Nm) and potassium ...