Ecological Research

vol. 29 2014

Water drives nutrient cycles within or between ecosystems. Dissolved organic matter plays important roles in transport of nutrients in northern ecosystems. Black river water rich in dissolved organic matter can be produced from organic soils in the Northwest Territories, Canada (top). Substantial production of dissolved organic matter in the organic layer can enhance mobilization of nutrients from the highly leached soil without increasing leaching risks under tropical forest in East Kalimantan, Indonesia. Forest damages by fires and logging could disrupt this cycle and increase nitrate leaching (middle). Conversion of slash-burn agriculture to continuous cropping can also increase nitrate leaching and soil acidifi cation, as in northern Thailand (bottom).
Photos by Kazumichi Fujii*

Kazumichi Fujii is the recipient of the 1th Suzuki Award!!
Check his award article