Title
Development of lacustrine primary productivity in the Amazon Basin during the Holocene
Date Issued
01 July 2022
Access level
metadata only access
Resource Type
journal article
Author(s)
Soares J.H.F.
Moreira L.S.
Moreira-Turcq P.
Sifeddine A.
Dornellas N.
Evangelista H.
Nogueira J.
Aniceto K.
Martins G.S.
Kury M.S.
Brandini N.
Contrera J.M.
Cordeiro R.C.
Research Institute Development
Publisher(s)
SAGE Publications Ltd
Abstract
The Amazon Basin is one of the most productive regions in the world and an important carbon sink. However, lake productivity has varied throughout the Holocene, as preserved in lacustrine sedimentary records. Concentrations of chlorophyll pigmented derivatives that are mainly derived from phytoplankton and macrophyte populations can be used to infer lake production levels. Here we use the chlorophyll derivatives concentrations analyzed by spectrophotometer in sediment cores from nine lakes distributed throughout the Brazilian Amazon Basin to document the continental-scale changes in lake production during the Holocene. Chlorophyll derivatives have varied with changes in precipitation rate throughout the last 10,000 years, similar to other climate records in tropical South America, including Ti concentration from the Cariaco Basin, δ13C from Lake Titicaca, and refractory black carbon in Nevado Illimani. Increasing precipitation is responsible for increasing the nutrient supply into the lake, which stimulates primary production. Our analysis was compared to climate-related parameters, suggesting an increasing trend of lake production rates during the wetter Late and Early Holocene, while lower production rates characterized the dry phase of the Middle Holocene. Therefore, the chlorophyll derivatives concentrations generally follow precipitation changes in the Amazon Basin during the Holocene.
Start page
639
End page
649
Volume
32
Issue
7
Language
English
OCDE Knowledge area
Geoquímica, Geofísica
Investigación climática
Subjects
Scopus EID
2-s2.0-85130966268
Source
Holocene
ISSN of the container
09596836
Sponsor(s)
The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This research was supported by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brazil (CAPES) – Finance Code 001 and the ANR-15-JCLI-0003-03 BELMONT FORUM PACMEDY project. This research was also supported by the French Research Institute for Development (IRD), by the HYBAM Observatory ( https://hybam.obs-mip.fr/ ) in the frame of its cooperation agreement with the Brazilian Research Centre (CNPq).
Sources of information:
Directorio de Producción Científica
Scopus