HIPPO environmental monitoring: Impact of phytoplankton dynamics on water column chemistry and the sclerochronology of the king scallop (Pecten maximus) as a biogenic archive for past primary production reconstructions

Abstract

Abstract. As part of the HIPPO (HIgh-resolution Primary Production multi-prOxy archives) project, an environmental monitoring was carried out between March and October 2021 in the Bay of Brest. The aim of this survey was to better understand the processes which drive the incorporation of chemical elements into scallop shells and their links with phytoplankton dynamics. For this purpose, biological samples (scallops and phytoplankton) as well as water samples were collected in order to analyse various environmental parameters (element chemical properties, nutrients, chlorophyll, etc.). Here, some of the monitoring data are presented and discussed. The whole dataset is much larger and can potentially be very useful for other scientists performing sclerochronological investigations, studying biogeochemical cycles or conducting various ecological research projects.

Uptake of barium, molybdenum, and lithium and incorporation into scallop shells: Refining proxies for primary production dynamics

“…The data used and analyzed in this study are published in Siebert et al (2023) and available at the SEANOE data repository (https://www.seanoe.org/data/00808/92043/). All additional supporting materials are provided in the Supporting Information.…”

“…This study combines highly resolved time series of Ba/Ca shell , Mo/Ca shell , and Li/Ca shell measured in contemporaneous P. maximus specimens (Bay of Brest, France) with detailed environmental monitoring data (Siebert et al 2023), aiming to verify and refine proposed hypotheses about the uptake of Ba, Mo, and Li from the ambient environment into the shells. Specifically, it was tested that phytoplankton-related processes occurring within the water column affect the chemical composition of scallop shells, substantiating these shells as reliable geochemical archives to accurately record respective events.…”