|Lake name:||Iso-Jurvo||Country:||Finland||GIG Region:||N|
|GIG Type:||LN2a||Lake code:||14.418.1.004_001||Altitude(m a.s.l.):||138|
|Area (km²):||2.0||Mean depth (m):||8.6||Mixing regime:||Stratified|
|Alkalinity (m eq/l):||0.08||Retention time (yr):||4.8||Chlorophyll a (µg/l):||2.65|
|Total phosphorus (µg/l):||5.5||Eutrophication status:||1 - Low||Hydromorphological status:||2 - Medium|
A typical clear water oligotrophic lake (Secchi depth 3.5 m; August 2009) representing botanically Lobelia-type of lakes situated at sandy areas. Despite some scattered settlements around the lake, the lake represents reference conditions. Flourishing macrophytic vegetation consists of large isoetids (Lobelia dortmanna, Isoetes lacustris, Isoetes echinospora) typical for reference lakes.
At sheltered shores you can find also helophytes Phragmites australis and Equisetum fluviatile with floating leaved vegetation like Nuphar lutea. A limited number of limnological data is available from the lake since the early 1970's. The fish community includes at lest seven species, vendace (Coregonus albula) and bullhead (Cottus gobio) indicating good environmental conditions of an oligotrophic lake. All biological elements included in WISER are sampled in the lake.
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