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Zell, Claudia; Kim, Jung-Hyun; Abril, Gwenaël; de Lima Sobrinho, Rodrigo; Dorhout, Denise J C; Moreira-Turcq, Patricia; Sinninghe Damsté, Jaap S (2013): Seasonal changes in brGDGTs in the Amazonas river [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.884026, Supplement to: Zell, C et al. (2013): Impact of seasonal hydrological variation on the distributions of tetraether lipids along the Amazon River in the central Amazon basin: implications for the MBT/CBT paleothermometer and the BIT index. Frontiers in Microbiology, 4, https://doi.org/10.3389/fmicb.2013.00228

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Abstract:
Suspended particulate matter (SPM) was collected along the Amazon River in the central Amazon basin and in three tributaries during the risingwater (RW), high water (HW), falling water (FW) and low water (LW) season. Changes in the concentration and the distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs), i.e., the methylation index of branched tetraethers (MBT) and the cyclization of brGDGTs (CBT), were seen in the Amazon main stem. The highest concentration of core lipid (CL) brGDGTs normalized to particulate organic carbon (POC) was found during the HW season. During the HW season the MBT and CBT in the Amazon main stem was also most similar to that of lowland Amazon (terra firme) soils, indicating that the highest input of soil-derived brGDGTs occurred due to increased water runoff. During the other seasons the MBT and CBT indicated an increased influence of in situ production of brGDGTs even though soils remained the main source of brGDGTs. Our results reveal that the influence of seasonal variation is relatively small, but can be clearly detected. Crenarchaeolwasmostly produced in the river. Its concentration was lower during the HW season compared to that of the other seasons. Hence, our study shows the complexity of processes that influence the GDGT distribution during the transport from land to ocean. It emphasizes the importance of a detailed study of a river basin to interpret the MBT/CBT and BIT records for paleoreconstructions in adjacent marine setting.
Project(s):
NIOZ Royal Netherlands Institute for Sea Research, and Utrecht University (NIOZ_UU)
Coverage:
Median Latitude: -2.776299 * Median Longitude: -57.619743 * South-bound Latitude: -3.409000 * West-bound Longitude: -60.553300 * North-bound Latitude: -1.911500 * East-bound Longitude: -54.988300
Date/Time Start: 2009-06-20T00:00:00 * Date/Time End: 2011-02-05T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Zell, C; Kim, J-H; Abril, G et al. (2013): (Table 3) BIT, MBT, DC, reconstructed pH and reconstructed MAAT values of SPM samples of the Amazon basin. https://doi.org/10.1594/PANGAEA.884024
  2. Zell, C; Kim, J-H; Abril, G et al. (2013): (Table 4) Flux-weighed BIT, MBT, DC, reconstructed pH and reconstructed MAAT values of SPM samples of the Amazon basin. https://doi.org/10.1594/PANGAEA.884025
  3. Zell, C; Kim, J-H; Abril, G et al. (2013): (Table 2) GDGT concentrations in SPM samples of the Amazon basin. https://doi.org/10.1594/PANGAEA.884022
  4. Zell, C; Kim, J-H; Abril, G et al. (2013): (Table 1) Sampling stations and environmental data of the Amazon basin. https://doi.org/10.1594/PANGAEA.884021