Distribution, ecology, and coenotic connections of Isoёtes setacea in the Khanty-Mansiysk autonomous okrug - Ugra

Two new locations of Isoёtes setacea Durieu (Isoёtaceae, Lycopodiophyta) are described, along with the results of a hydrochemical study of the aquatic environment in the ecotopes of this species, and a coenotic features of plant aggregations in which it is involved on the territory of the Numto Natural Park in the Khanty-Mansiysk Autonomous Okrug. Based on the hydrochemical analysis, the hydrogen ion concentration (рН) of water in the I. setacea ecotopes is 5.6 to 6.2, water color is 13 to 34 degrees of the chrome-cobalt scale, overall mineralization of water is 0.01 g/dm3, overall hardness is 0.04 to 0.09 meq/dm3. The content of oil products (petroleum hydrocarbons) is within 0.03 mg/md3. The concentrations of soluble forms of heavy metals are within the following ranges: Fe: 7.9 to 1,299.4 µg/dm3, Pb: 0.07 to 0.24 µg/dm3, Ni: 0.00 to 0.09 µg/dm3, Zn: 16.08 to 32.10 µg/dm3, Cd: 0.03 µg/dm3, Cr: 0...