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Algal blooms were reported in Slocan Lake in 2009. This year we observed one in Wilson Creek. It was located on the south side of the creek at the mouth and ran upstream over 200 yards. More data is being gathered and will be reported here as it becomes available. This Research Centre has been recording hourly temperatures in Wilson Creek since May 2009. The data will be posted on this website.

By reporting the occurence and location of these algal growths we can assemble data that will establish whether or not the blooms are increasing. We will also be giving more data on the types of algae and what to watch for as we learn more about it.


4 thoughts on “Algae

  1. May 10/10 1.20 PM, Wilson Creek. The algae that Margaret, Ruby and I observed in the creek, between the mouth and the old RR bridge is about 50% of what was there a month or so ago. It appears that the higher flow rates in the creek have washed a lot away. The white filamentaceous form appears completely gone. I will, hopefully, get Margaret to take some more pictures so that we can compare the difference.

  2. Hi Richard,
    Regarding the algal growth – we sometimes see it in the Little Slocan – usually in side channels where there is cold water input (more nutrients)- long filamentous strands. Looks like Spirogyra under the scope.
    Last year in the Fall we observed a large green patch just downstream of Slocan City. I will send you a picture
    As you know, our lake/river is oligotrophic & little nutrient input = big algae bloom. Even logging & resultant nutrient runoff can stimulate growth.

  3. Hi Richard, Margaret Hartley sent me some photos of the “rock snot” algae at Wilson you observed in the spring. It is definitely didymo or toilet paper algae (or rock snot). We find a lot of it around the mouth of Pass (Norn’s) Creek in the Lower Columbia River. It spreads quite easily through boat bilge and felt treads on fishing waders. It seems to be one of those species that is expanding its range, for reasons yet unknown. One theory is that it has hybridized with it’s European strain and is now more tolerant of a wide range of temperature and nutrient conditions. The issue is world-wide. The colonies prefer flowing water, which is why you will see it in Wilson Creek but not in the lake. I would suggest that you post Margaret’s photos.

    As a note of interest only, the city of Trail used to complain about all the “toilet paper” from Castlegar’s sewage lagoons that was observed floating down the river in the spring. Turns out this was didymo “leafing off” some of its dead portions. This floating dead material looks like slightly decomposed toilet paper floating near the surface, hence its other name “toilet paper algae”. Google it, lots of info.

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