Abstract:One of the most southern European occurrences of
Potamogeton praelongus
is in the Czech Republic (CR), with only one native population in the Orlice River floodplain in Eastern Bohemia, the only surviving site from 10 Czech localities known 45 years ago. This species is critically endangered in the CR and needs to be actively protected with a rescue program. The number of
P. praelongus
sites increases along a latitudinal gradient, from Central to North Europe (CR, Poland, Sweden, and Norway), a… Show more
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