Dissolved organic matter, chlorophyll a and bacterial abundance measured in water samples of POLARSTERN cruise PS111 (ANT-XXXIII/2) ...

• Main Authors: Piontek, Judith, Hassenrück, Christiane, Jürgens, Klaus, Engel, Anja
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Ecology & Environment; Microbiology; FOS Biological sciences; Event label; Cruise/expedition; Station label; LATITUDE; LONGITUDE; DATE/TIME; Sample ID; Bottle number; DEPTH, water; Depth, bathymetric; Carbon, organic, dissolved; Carbohydrates, dissolved combined; Carbohydrates, dissolved combined, Carbon; Fucose; Rhamnose; Galactosamine; Arabinose; Glucosamine; Galactose; Glucose; Mannose/Xylose; Galacturonic acid; Glucuronic acid; Amino acids, dissolved; Amino acids, dissolved, Carbon; Aspartic acid; Glutamic acid; Serine; Threonine; Glycine; Arginine; Alanine; gamma-Aminobutyric acid; Tyrosine; Valine; Isoleucine; Phenylalanine; Leucine; Phosphate; Nitrate; Nitrite; Silicate, inorganic, dissolved; Bacteria; Chlorophyll a; CTD/Rosette; CTD; High-temperature catalytic oxidation method TOC-VCSH, Shimadzu Qian and Mopper, 1996; Antarc*; Antarctic; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.938702; https://doi.pangaea.de/10.1594/PANGAEA.938702

Global warming poses new threats to marine ecosystems since rising seawater temperature potentially induces cascading effects in biogeochemical cycles and food webs. Heterotrophic bacteria are the main producers of CO2 in the ocean, thereby counteracting the biological drawdown of CO2 by primary production. In Antarctic marine systems, low seawater temperature, and the low availability of labile organic matter are major environmental constraints on bacterial growth and degradation activity. However, temperature and the availability of resources for heterotrophic bacteria undergo considerable change induced by climate warming combined with subsequent ice melt and changes in primary productivity. This project aims to test single and combined effects of temperature and organic matter availability on Antarctic marine bacterioplankton. This data set includes biological and biogeochemical parameters measured alongside the CTD casts during the Polarstern cruise PS111 to the Weddell Sea. Samples were collected in ...