Triterpenols in mangrove sediments as a proxy for organic matter derived from the red mangrove (Rhizophora mangle)
Boris P. Koch
Pedro W.M. Souza Filho
Hermann Behling
Marcelo C.L. Cohen
Gerhard Kattner
Jürgen Rullkötter
Barbara Scholz-Böttcher
Rubén J. Lara
Abstract
Mangroves are the dominant type of vegetation along many tropical coasts. Organic matter (OM) derived from mangrove leaf litter and root material is stored in sediments and is a major contributor to the amount and chemical composition of sedimentary OM. A set of organic biomarkers in sediments was applied as a palaeo-indicator for the Holocene dynamics of a mangrove Estuary (Rio Caeté, Pará, Brazil). Six sediment cores were collected perpendicular to the present coast line and analysed for triterpenols and sitosterol. The influence of microbial biomarker degradation was implemented from a previous study. Biomarker profiles were validated with pollen data and multivariate statistics to test whether these compounds were suitable indicators for the palaeo-vegetation. Sediments deposited up to 2 Ma BP showed biomarker assemblages similar to those of recent surface sediment. In two cores, the biomarker composition revealed a transition from marsh to mangrove vegetation. Taraxerol, germanicol and β-amyrin provided the most significant chemotaxonomical information and, especially in combination, served as reliable proxies for OM from Rhizophora mangle in northern Brazil. The maximum age of the mangrove system ranged between 1000 and 5100 yr depending on the topographic elevation of the drilling location.
Koch B.P., Souza Filho P.W.M., Behling H., Cohen M.C.L., Kattner G., Rullkötter J., Scholz-Böttcher B. and Lara R.J. (2011) Triterpenols in mangrove sediments as a proxy for organic matter derived from the red mangrove (Rhizophora mangle). 42(1): 62-73. 10.1016/j.orggeochem.2010.10.007
@article{Koch2011,
Title = {Triterpenols in mangrove sediments as a proxy for organic matter derived from the red mangrove (Rhizophora mangle)},
Author = {Koch, Boris P. and Souza Filho, Pedro W.M. and Behling, Hermann and Cohen, Marcelo C.L. and Kattner, Gerhard and Rullkötter, Jürgen and Scholz-Böttcher, Barbara and Lara, Rubén J.},
Editor = {},
Year = {2011},
Pages = {62-73},
Volume = {42},
Doi = {10.1016/j.orggeochem.2010.10.007},
Abstract = {Mangroves are the dominant type of vegetation along many tropical coasts. Organic matter (OM) derived from mangrove leaf litter and root material is stored in sediments and is a major contributor to the amount and chemical composition of sedimentary OM. A set of organic biomarkers in sediments was applied as a palaeo-indicator for the Holocene dynamics of a mangrove Estuary (Rio Caeté, Pará, Brazil). Six sediment cores were collected perpendicular to the present coast line and analysed for triterpenols and sitosterol. The influence of microbial biomarker degradation was implemented from a previous study. Biomarker profiles were validated with pollen data and multivariate statistics to test whether these compounds were suitable indicators for the palaeo-vegetation. Sediments deposited up to 2 Ma BP showed biomarker assemblages similar to those of recent surface sediment. In two cores, the biomarker composition revealed a transition from marsh to mangrove vegetation. Taraxerol, germanicol and β-amyrin provided the most significant chemotaxonomical information and, especially in combination, served as reliable proxies for OM from Rhizophora mangle in northern Brazil. The maximum age of the mangrove system ranged between 1000 and 5100 yr depending on the topographic elevation of the drilling location.},
}
TY - JOUR
AU - Koch, Boris P.
AU - Souza Filho, Pedro W.M.
AU - Behling, Hermann
AU - Cohen, Marcelo C.L.
AU - Kattner, Gerhard
AU - Rullkötter, Jürgen
AU - Scholz-Böttcher, Barbara
AU - Lara, Rubén J.
TI - Triterpenols in mangrove sediments as a proxy for organic matter derived from the red mangrove (Rhizophora mangle)
PY - 2011
SP - 62-73
VL - 42
DO - 10.1016/j.orggeochem.2010.10.007
AB - Mangroves are the dominant type of vegetation along many tropical coasts. Organic matter (OM) derived from mangrove leaf litter and root material is stored in sediments and is a major contributor to the amount and chemical composition of sedimentary OM. A set of organic biomarkers in sediments was applied as a palaeo-indicator for the Holocene dynamics of a mangrove Estuary (Rio Caeté, Pará, Brazil). Six sediment cores were collected perpendicular to the present coast line and analysed for triterpenols and sitosterol. The influence of microbial biomarker degradation was implemented from a previous study. Biomarker profiles were validated with pollen data and multivariate statistics to test whether these compounds were suitable indicators for the palaeo-vegetation. Sediments deposited up to 2 Ma BP showed biomarker assemblages similar to those of recent surface sediment. In two cores, the biomarker composition revealed a transition from marsh to mangrove vegetation. Taraxerol, germanicol and β-amyrin provided the most significant chemotaxonomical information and, especially in combination, served as reliable proxies for OM from Rhizophora mangle in northern Brazil. The maximum age of the mangrove system ranged between 1000 and 5100 yr depending on the topographic elevation of the drilling location.
ER -
