(Table 1) Radiocarbon dating of a lake sediment core, southern West Greenland ...

• Main Authors: Anderson, N John, Brodersen, Klaus P, Ryves, David B, McGowan, Suzanne, Johansson, Liselotte S, Jeppesen, Erik, Leng, Melanie J
• Format: Dataset
• Language: English
• Published: PANGAEA 2008
• Subjects: Sample ID; Depth, top/min; Depth, bottom/max; DEPTH, sediment/rock; Age, dated material; Age, dated; Age, dated standard deviation; Calendar age; Age, minimum/young; Age, maximum/old; δ13C; Russian corer; Age, 14C AMS; Age, 14C calibrated, CALIB Stuiver & Reimer, 1993; International Polar Year 2007-2008 IPY; Betula nana; Greenland; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.806777; https://doi.pangaea.de/10.1594/PANGAEA.806777

The dominant processes determining biological structure in lakes at millennial timescales are complex. In this study, we used a multi-proxy approach to determine the relative importance of in-lake versus indirect processes on the Holocene development of an oligotrophic lake in SW Greenland (66.99°N, 50.97°W). A 14C and 210Pb-dated sediment core covering approximately 8500 years BP was analyzed for organic-inorganic carbon content, pigments, diatoms, chironomids, cladocerans, and stable isotopes (d13C, d18O). Relationships among the different proxies and a number of independent controlling variables (Holocene temperature, an isotope-inferred cooling period, and immigration of Betula nana into the catchment) were explored using redundancy analysis (RDA) independent of time. The main ecological trajectories in the lake biota were captured by ordination first axis sample scores (18-32% variance explained). The importance of the arrival of Betula (ca. 6500 years BP) into the catchment was indicated by a series of ... : Before present = AD 1950. Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...