Landscape determinants of lake benthic and pelagic primary production ...

• Main Author: Puts, Isolde Callisto
• Format: Dataset
• Language: English
• Published: Dryad 2022
• Subjects: FOS: Earth and related environmental sciences; autotrophic structuring; Primary production; DOC; browning; GPP; Climate change; Arctic; Browning; Northern Sweden; Subarctic; Norrbotten
• Online Access: https://dx.doi.org/10.5061/dryad.vx0k6djvs; https://datadryad.org/stash/dataset/doi:10.5061/dryad.vx0k6djvs

Global change affects gross primary production (GPP) in benthic and pelagic habitats of northern lakes by influencing catchment characteristics and lake water biogeochemistry. However, how changes in key environmental drivers manifest and impact total (i.e., benthic + pelagic) GPP and the partitioning of total GPP between habitats, here represented by the benthic share (autotrophic structuring) is unclear. This dataset presentes compiled data on summer gross primary productivity (GPP) in benthic and pelagic habitats sampled in situ between 2005-2017, together with water chemistry, from 26 shallow lakes (maximum 3.7-15.8 m deep) from three different sites in northern Sweden, located in the Arctic (Norrbotten), subarctic (Jämtland) and boreal (Västerbotten) biomes. The three study regions have variable elevation gradients and vegetation cover. The study lakes cover a wide range of DOC (1.5-16.3 mg·L-1) and accompanied water physico-chemistry. Using this dataset, we investigate how catchment properties (air ... : Database accompanying arcticle "Landscape determinants of pelagic and benthic primary production in northern lakes" with pelagic and benthic GPPz rates, and GPPlake-average with physico-chemical data for each lake. Sampling, lake water physico-chemistry and bathymetry Water chemistry, PAR and temperature were measured on the same dates as GPP measurements. PAR and temperature were measured from the surface to the bottom with 1m depth intervals at the deepest part of the lake, with additional measurements at 0.25m and 0.5m using a handheld probe. Light attenuation coefficients (Kd) of the lake water were calculated as the absolute slope of natural logarithmically transformed photosynthetically active radiation (PAR) against depth. The sum of incoming PAR over the day was retrieved from stations we installed next to the lake. We used the water temperature measured at 0.2m depth (Twater) as proxy for lake epilimnion temperatures. Average air temperatures one month before sampling (Tair) were retrieved from ...