Amaral P. G. C., Giannini P. C. F., Sylvestre Florence, Pessenda L. C. R. (2012). Paleoenvironmental reconstruction of a Late Quaternary lagoon system in southern Brazil (Jaguaruna region, Santa Catarina state) based on multi-proxy analysis. Journal of Quaternary Science, 27 (2), p. 181-191. ISSN 0267-8179.
Titre du document
Paleoenvironmental reconstruction of a Late Quaternary lagoon system in southern Brazil (Jaguaruna region, Santa Catarina state) based on multi-proxy analysis
Amaral P. G. C., Giannini P. C. F., Sylvestre Florence, Pessenda L. C. R.
Source
Journal of Quaternary Science, 2012,
27 (2), p. 181-191 ISSN 0267-8179
This paper provides a paleoenvironmental reconstruction of a Late Quaternary lagoon system in the Jaguaruna region of Santa Catarina state, southern Brazil. Integrated results of bulk sedimentary organic matter characterization (delta C-13, delta N-15 and C/N), microfossil (pollen and diatom) and grain-size analysis from three shallow cores (similar to 2.5m depth) allowed us to propose an evolving paleogeographic scenario in this coastal region for the last ca. 5500 cal a BP. The lagoonal system in this area was more extensive during the mid-Holocene than today, with a gradual and continuous lagoon-sea disconnection until the present. We add to the debate regarding relative sea-level (RSL) variations for the Brazilian coast during the Holocene and discuss the importance of sedimentary dynamics for interpreting changes in coastal ecosystems. The multi-proxy analysis suggests that changes in coastal ecosystems could be directly related to local sedimentary processes, which are not necessarily linked to RSL fluctuations and/or to climatic variations.
Plan de classement
Ecologie, systèmes aquatiques [036]
;
Géologie et formations superficielles [064]
