Multi-proxy analysis of sediment cores from Lake Funda (Azores archipelago, Portugal) ...

• Main Authors: Raposeiro, Pedro Miguel, Hernández, Armand, Pla-Rabes, Sergi, Bao, Roberto, Sáez, Alberto, Benavente, Mario, Richter, Nora, de Groff, Wylie, de Boer, Erik J, Ritter, Catarina, Amaral-Zettler, Linda A, Giralt, Santiago
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Azores Archipelago; deep lake; multiproxy; oceanic island; AGE; Age; Aerophilous diatoms; Diatoms, benthic; Carbon dioxide, partial pressure, blood, standard error; Diatoms, planktic; Chironomini; Orthocladiinae; Tanytarsini; Tanypodinae; Coccoliths, standard deviation; Charcoal, flux; Accumulation rate, coprophilous fungi spores; Arboreal pollen; Pollen, shrubs; Pollen, herbs; Accumulation rate, macrophytes seeds; Carbon, organic, total/Nitrogen, total ratio; Carbon, organic, total; δ13C; Nitrogen, total; δ15N; Accumulation rate, 5beta-cholestan-3beta-ol; Accumulation rate, 5alpha-stigmastan-3beta-ol; Gravity corer, UWITEC; AMS 14C dating on pollen concentrates; Clam routine on R; Diatom analysis Battarbee, 1986, in Berglund, Handbook of Holocene Pal.; Chironomid analysis Brooks et al, 2007, The identification and use of Palaeartic Chironomid Larvae in Palaecology; Charcoal analysis Whitlock & Larsen, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments; Pollen analysis Bennett & Willis, 2001, in Birks & Last, Tracking Environmental Change Using Lake Sediments; Mass spectrometer Finnigan Finnigan delta Plus EA-CF-IRMS; Chromatography; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.933712; https://doi.pangaea.de/10.1594/PANGAEA.933712

The Azores archipelago is a group of nine oceanic volcanic islands located in the mid-North Atlantic, roughly 1500 km from Europe and 1900 km from America. Lake Funda is situated in the southern sector of the central plateau of Flores Island at 351 m altitude and occupies the bottom of a small maar-explosion crater with 875 m in length and 625 m width, with a total area of 0.37 km2 where several water lines converge. A coring campaign was conducted in June 2017 using a 60mm diameter UWITEC gravity corer from UWITEC floating platform retrieving a core (9.97 m long) located in the deepest part of the lake. The core was dated using ¹⁴C and produced a multi-proxy dataset of geochemical and biological analyses that we used to uncover paleoenvironmental changes on Lake Azul in the last 1300 years., ...