We have recently bought a portable LI-COR instruments for field measurements of CO2 and CH4 in both aquatic and terrestrial systems.

Just published a papr about multiple stressor effects, see

Birk, S., Chapman, D., Carvalho, L. et al. Impacts of multiple stressors on freshwater biota across spatial scales and ecosystems. Nat Ecol Evol (2020). https://doi.org/10.1038/s41559-020-1216-4

has just been published in Water as part of the Special Issue „Transformation of Dissolved
Organic Matter in Aquatic Landscapes“ and is available online:

Abstract: https://www.mdpi.com/2073-4441/12/6/1617
PDF Version: https://www.mdpi.com/2073-4441/12/6/1617/pdf

Special Issue:
https://www.mdpi.com/journal/water/special_issues/dissolved_organic_matter

Within the project „Organic Carbon ORCA“, a portable sensor for DOM fluorescence indices was developed. The paper is online now: „Brandl, M., T. Posnicek, R. Preuer, G. Weigelhofer (2020) A Portable Sensor System for Measurement of Fluorescence Indices of Water Samples. IEEE SENSORS JOURNAL. 10.1109/JSEN.2020.2988588.“

„A multi-scale, integrative modeling framework for setting conservation priorities at the catchment scale for the Freshwater Pearl Mussel Margaritifera margaritifera“ published in Sci Tot Environ (20 May 2020). An ecohydrological modeling cascade was developed on the base of hydrological, hydraulic, sand accumulation, and species distribution models in order to indentify and prioritize the sites for life-stage-specific conservation actions for the freshwater pearl mussel.

Machado dos Santos Pinto R. et al (2020) River-floodplain restoration and hydrological effects on GHG emissions: Biogeochemical dynamics in the parafluvial zone. Sci Tot Environ 715.

The paper describes the effects of drying and re-wetting on the CO2, CH4 and N2O fluxes in the parafluvial zone of a restored floodplain channel. Enhanced biogeochemical turnover rates were identified
during the intermittent period, when N2O and CO2 emissions peaked.

https://doi.org/10.1016/j.scitotenv.2020.136980