Jörn Kohlus

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Aerial surveys on seagrass (Zostera spp.) indicate a three to fourfold increase in bed area from 1994 to 2006 with up to 100 km2 or 11% of intertidal flats in the Northfrisian Wadden Sea (coastal eastern North Sea), observed at seasonal maximum in August when flying during low tide exposure 300 to 500 m above ground. When viewed from the air, difficulties(More)
The Marine Data Infrastructure Germany (MDI-DE) is a thematic network of federal and state organizations. It was created mainly to enable the reporting requirements for the European Marine Strategy Framework Directive (MSFD) to be carried out technically and organisationally. From a technical-conceptual point of view, it is a spatial data infrastructure(More)
High-resolution multispectral remote sensing data from satellite-borne optical sensors have already been used for the classification of sediments, macrophytes, and mussels in the German Wadden Sea. Since the use of those sensors in northern latitudes is strongly limited by clouds and haze, we included synthetic aperture radar (SAR) data, allowing earth(More)
The Wadden Sea along the North Sea coasts of Denmark, Germany, and the Netherlands is the largest unbroken system of intertidal sand and mud flats in the world. Its habitats are highly productive and harbour high standing stocks and densities of benthic species, well adapted to the demanding environmental conditions. Therefore, the Wadden Sea is one of the(More)
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