Organic matter composition and paleoclimatic changes in tropical mountain peatlands currently under grasslands and forest clusters

Silva, Alexandre Christófaro; Barbosa, Maurício Soares; Barral, Uidemar Morais; Silva, Bárbara Pereira Christófaro; Fernandes, José Sebastião Cunha; Viana, Abraão José Silva; Filho, Carlos Victor Mendonça; Bispo, Diêgo Faustolo Alves; Christófaro, Cristiano; Ragonezi, Carla; Guilherme, Luiz Roberto Guimarães

http://hdl.handle.net/10400.13/4041

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Autores

Silva, Alexandre Christófaro

Barbosa, Maurício Soares

Barral, Uidemar Morais

Silva, Bárbara Pereira Christófaro

Fernandes, José Sebastião Cunha

Viana, Abraão José Silva

Filho, Carlos Victor Mendonça

Bispo, Diêgo Faustolo Alves

Christófaro, Cristiano

Ragonezi, Carla

Resumo(s)

Tropical peatlands are important ecosystems for Planet Earth, as they store large amounts of carbon and water. A better understanding of the impact of vegetation type and altitude in content, composition, and rate of accu mulation of organic matter is key for assessing the current role of such environments. This study evaluated fibric and soluble fractions as well as the lignocellulosic and the isotopic compositions of the peat organic matter from four tropical mountain peatlands located at different altitudes of the Serra do Espinhaço Meridional, state of Minas Gerais, Brazil. The peatlands are currently under grasslands and forest clusters. Samples of peat under both vegetation types were collected and analyzed for organic matter fractions, cellulose, and lignin (van Soest method), as well as carbon and nitrogen isotopes. Different depths were chosen for radiocarbon dating of se lected samples. The organic matter of peatlands currently under grasslands and forest clusters presented dif ferences in soluble fractions, lignocellulosic composition, and δ13C values. Multivariate analyses allowed grouping the peatlands by altitude and vegetation type. The chronological succession of grassland and forest clusters in tropical mountain peatlands was influenced by altitude and was related to paleoclimatic changes.

Palavras-chave

Organosol Vegetation types Altitude C and N isotopes . Escola Superior de Tecnologias e Gestão

URI

http://hdl.handle.net/10400.13/4041

Citação

Silva, A. C., Barbosa, M. S., Barral, U. M., Silva, B. P. C., Fernandes, J. S. C., Viana, A. J. S., ... & Guilherme, L. R. G. (2019). Organic matter composition and paleoclimatic changes in tropical mountain peatlands currently under grasslands and forest clusters. Catena, 180, 69-82. http://dx.doi.org/10.1016/j.catena.2019.04.017

Editora

Elsevier

DOI

10.1016/j.catena.2019.04.017

Coleções

Artigos em revistas internacionais

Licença CC

cclicense-by-nc-nd

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