Documento
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effects_of_nutrient_addition_on_polyphenol_and_nutrient_concentrations_in_leaves_of_woody_species_of_a_savanna_woodland_in_central_brazilBaixar
Metadados
Título
Effects of nutrient addition on polyphenol and nutrient concentrations in leaves of woody species of a savanna woodland in Central Brazil
Descrição
We investigated whether changes in nutrient availability affected N, P, S and polyphenol concentrations in different leaf-development stages of three brevideciduous and three evergreen
dominant woody species in a nutrient-limited savanna woodland in Central Brazil.
Treatments included eight years of annual fertilization with 100 kg ha−1 of N, P, N plus P
and control, each replicated in four randomized 15 × 15-m plots. All species increased
S concentrations (minimum 28%) in young and mature leaves in fertilized plots. Dalbergia
miscolobium decreased total phenol concentrations with P (−34.3%, −23.7%) and NP fertilization (−28.2%, −17.1%). Blepharocalyx salicifolius increased total phenol (27.6%, 18.8%) and
tannin (46.3%; 43.5%) in P fertilized and increased total phenol (33.9%) and tannin (27.8%,
43.5%) in NP fertilized plots. Total phenol concentration decreased with leaf age in Ouratea
hexasperma, Styrax ferrugineus and Blepharocalyx salicifolius, which also decreased tannin
concentration with leaf age. For all treatments, brevideciduous species had higher N, P,
total phenols and tannin concentrations and lower S concentration than evergreens. These
differences between phenological groups suggest that tropical ecosystems responses to
environmental changes are more complex than anticipated by global vegetation models, with
consequences for predictions in ecosystem functions and resilience.
Tipo de documento
Artigo
Autor(es)
Tamiel Khan Baiocchi Jacobson | Mercedes Maria da Cunha Bustamante
Universidade
Cambridge University Press
Assunto
Biogeochemistry | Brazilian savanna | Eutrophication | Fertilization | Leaf age
Natureza do suporte
Versão eletrônica
Eixo temático
Taxonomia
Nome do periódico
Journal of Tropical Ecology
Ano
2018
Edição
6
Volume
35
Número de páginas
10
Idioma
Inglês
Acesso ao documento
Referência
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