Continuous light intensity observations within BEFmate artificial islands and saltmarsh control plots at different elevation levels, Spiekeroog, Germany, 2014-09 to 2017-04

Data presented here were collected between October 2014 to April 2017 within the BEFmate project (Biodiversity - Ecosystem Functioning across marine and terrestrial ecosystems; https://www.icbm.de/verbundprojekte/befmate/ ) of the Universities of Oldenburg and Göttingen and the Nationalparkverwaltung Niedersächsisches Wattenmeer. Experimental islands and saltmarsh control plots were created in the back barrier tidal flat and in the saltmarsh zone of Spiekeroog island. Data were measured with local installed light intensity logger within the experimental islands as well as in the saltmarsh control plots at different elevation levels. Light logger used here are DEFI-L Miniature Light Intensity Recorder (JFE Advantech Co., Ltd., Tokyo). The light recorders were pre-calibrated by the manufacturer. Recorded data were internal logged till readout with the DEFI Series software (V1.02) and processed using MATLAB (R2012b). Due to different calibrations for under water or above water application raw data were processed differently and were put together depending on low or high water times. Data were visually checked and outliers removed. The position was derived from a portable DGPS-system. Date and Time is given in UTC.