Continued dry periods and nitrogen input are hazardous to biological diversity
Agriculture must reduce nitrogen deposition
Over the past four decades the volume of nitrogen released into the environment worldwide has tripled-and this trend is set to continue, posing a long-term risk to biological diversity. ”Plants that thrive on nitrogen, e.g. nettles and boysenberries, are crowding out other species. Grassland is growing over entire habitat types adapted to conditions where few nutrients are present (e.g. raised bog and heath) and are at risk of being lost”, said Prof. Dr. Andreas Troge, President of the Federal Environment Agency (UBA). There are also problems occurring as a result of continued dry periods-as is presently the case in many regions in eastern Germany. The spread of nitrogen-loving grasses is a threat to water availability for forest trees during dry periods.