Lake Kasumigaura long-term monitoring station - Japan
Lake Kasumigaura long-term monitoring station
net primary production
We have been monitoring Lake Kasumigaura, the second largest lake in Japan, monthly for nearly four decades. We have monitored not only environmental variables, water quality, nutrients, and heavy metals, but also plankton (e.g., bacteria, heterotrophic nanoflagellates, ciliates, picoplankton, phytoplankton, zooplankton, mysids), primary production, benthos (chironomids and oligochetes), and fish. To increase data availability and the numbers of data users, we created an English web database (http://db.cger.nies.go.jp/gem/moni-e/inter/GEMS/database/kasumi/index.html) in this research period, and strengthened our relationships with international observational networks. We also provided monitoring data to the Japan Long-Term Ecological Research Network (JaLTER; http://www.jalter.org/index.php?ml_lang=en) and published two data papers in the international journal Ecological Research (Takamura et al. 2012 a, b). We have also started to register fish monitoring data in the Global Biodiversity Information Facility (GBIF) (http://www.gbif.org/dataset/f648085b-8e1c-4a79-bc8d-f45d36296564) .
General Characteristics, Purpose, History
The long-term monitoring project in Lake Kasumigaura has played an important role in both domestic and international monitoring networks. In 1996, Lake Kasumigaura was designated as a trend station in the Global Environmental Monitoring Systems (GEMS) Water Project, run by the United Nations to provide the international network for monitoring data on fresh water quality. Furthermore, Lake Kasumigaura is registered as a core site in the Japan Long-Term Ecological Research Network (JaLTER), which is a formal member of the International LTER Network (ILTER).
Field studies at Lake Kasumigaura, run by National Institute for Environmental Studies (NIES), were incorporated into the Global Environmental Monitoring Systems (GEMS)/Water Project in 1996, when the Center for Global Environmental Research (CGER) became the head office for Japan's National Focal Point for the project. In 2011, the head office has been transferred to the Center for Environmental Biology and Ecosystem Studies (CEBES). The long term monitoring has been implemented by CEBES in collaboration with the Center for Regional Environmental Research. Studies on Lake Kasumigaura have been conducted for nearly 40 years since the establishment of NIES, accumulating huge amount of data on water quality and other variables. However, the data resources were not prepared for practical uses among researchers as methods and data formats were not standardized and some data were missing. The purpose of Lake Kasumigaura Database development is to provide basic data of Lake Kasumigaura for the GEMS/Water project as well as researchers and the general public, and to contribute to research and policy-making with regards to conservation of lakes and marshlands. Lake Kasumigaura is regarded as an important lake for a long-term monitoring network. Not only as a trend station for GEMS/Water, but Lake Kasumigaura has also been designated as a monitoring site for “Japan Long-Term Ecological Research Network (JaLTER)”and “Monitoring Sites 1000”.
Affiliation and Network Specific Information