Effects of episodic nutrients enrichments on P-limited planktonic communities: Lake Redon ENEX 2013 experiment
Cite this dataset
Catalan, Jordi et al. (2021). Effects of episodic nutrients enrichments on P-limited planktonic communities: Lake Redon ENEX 2013 experiment [Dataset]. Dryad. https://doi.org/10.5061/dryad.tx95x69vh
Planktonic communities are naturally subjected to episodic nutrient enrichments that may stress or redress the imbalances in limiting nutrients. Human-enhanced atmospheric nitrogen deposition has caused profound N:P imbalance in many remote oligotrophic lakes in which phosphorus has largely become limiting. These lakes offer an opportunity to investigate the planktonic community response to nutrient fluctuations in P-limited conditions. The ENEX experiment in Lake Redon (Pyrenees), performed during August 2013, aimed to investigate the structural and stoichiometric effects of pulse nutrient additions on P-limited planktonic communities. We performed P (PO43-), and N (NH4+ or NO3-) additions to the summer epilimnetic community of the ultraoligotrophic lake using self-filling ~100 L enclosures and analysed the response to varying P availability, N:P imbalance, and N source. The nutrient additions were gradients within the range of values seasonally found in the lake and other oligotrophic lakes of the Pyrenees, with a further P level typical of mesotrophic lakes to provided non-limiting conditions.
Analytical methods are described in the associated publication:
Giménez-Grau, P., Felip, M., Zufiaurre, A., Pla-Rabès, S., Camarero, L. & Catalan, J. (2020) Homeostasis and non-linear changes in the stoichiometry of P limited planktonic communities. Ecosphere,11:e03249
Initial reference conditions in the lake water column were sampled during three dates. They are reported separately, but they should be amalgamated if used as initial experimental conditions. There are a few missing values across the biogeochemical data. Data from the enclosure water column and the sediment traps are reported in separated files.
Ministerio de Ciencia e Innovación, Award: CGL2010–19737
Ministerio de Ciencia e Innovación, Award: CGL2016–80124-C2-1-P
Government of Catalonia, Award: 2017 SGR 910
Ministerio de Ciencia e Innovación, Award: FPI BES-2014-070196
Ministerio de Educación Cultura y Deporte, Award: FPU AP2010-3596