Cyanobacteria blooming unusually early this year in a New Brunswick river

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[Music] so normally in May on the witi river we have high water for most of the month and then about the third week in May that water level starts to drop that’s when our summer students are hired and our field teams are out and we start our [Music] monitoring at that time we start our monitoring we can find cynobacteria at the site but it’s often just a thin green color on the Rocks like very thin and we watch this site weekly throughout the summer and we watch that grow and once it forms more of a carpet like mat we let environment know because at that time it can get thick lift off and wash out right so when you look at this right here this is not what you think of when you think of alow blue right you piure kind of Swampy green pring walking out there into that flowing part I have rocks covered like this so these rocks before the water came up would have just just been at the edge and submerged they may have even been exposed and dry up uh dried up at some point but this stuff right here is the mats I’m talking about they scrape and they lift away from the Rocks scouring these things then can float and wash up on shorelines [Music] so that is a typical Year may we would see start to see growth and then by late June or early July we would see uh a liftoff event that’s what we call it when uh it’s mature enough to disperse but this year as soon as we started our monitoring the third week in May the same time of year we normally do when I came out there were already mats washing up on shore as I arrived at the boat launch and we already had a thick carpet like bloom here that I normally wouldn’t see for at least another month if not six weeks this one yeah see that right from the bottom right there so if you look at the water it’s just like now it’s clear flowing Waters so it’s not an area that you typically think of a bloom but if you know what to look for when you see that mat and you look at the water the water would still be clear but you would not see spaces among the rocks because it’s on the bottom just like a carpet so early May for instance the tops of the Rocks may be greenish in color and then if I came back out in end of June I wouldn’t even see individual rocks that would link that alal growth would link between the rocks and form a bloom that’s when you’re looking at not just where it’s growing but where it’s ending up and where people and their dogs May encounter it in fedon we have an extensive trail system along the water we have lots of public access points and that’s why it’s really important that people are aware of what this is and know to look for it

Aquatic botanist Meghann Bruce searches for cyanobacteria in the St. John River near Fredericton after an unusually early bloom in May, something not usually seen until later in the summer.

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