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Index of Subjects Yes, and we used to drink it in winter playing hockey. Where would the high levels of coliform come from? On Mon, Dec 29, 2014 at 3:18 PM, Dusan Soudek <soudekd@ns.sympatico.ca> wrote: > Interestingly, the Frog Pond watershed is still largely forested, as much > of it is located within the Sir Sanford Fleming Park. And the entire > shoreline of the pond, with the exception of where it touches Purcells Cove > Road and a few lookoffs off the Frog Pond Trail, remains undeveloped. This > is quite unusual for HRM's urban and suburban water bodies, most of which > have experienced some degree of eutrophication.... > Dusan Soudek > > > -----Original Message----- From: Nicholas Hill > Sent: Monday, December 29, 2014 12:04 PM > To: naturens@chebucto.ns.ca > Subject: Re: [NatureNS] Frog Pond (Halifax) - Non-native Aquatic - Fanwort > (Cabomba sp.) > > > Something must be out of kilter in the Frog Pond; Invasive plants for > the most part, are indicators of a disrupted nutrient or disturbance > regime. The aquatic exotics do us a favour by pointing out lakes with > ecological health problems. The apparent outbreak of Cabomba > caroliniana at Frog Pond may be linked to a decline in that lake's > water quality. Coliform warning was given in 2008 (HRM data) for > coliforms around 800 MPN/100mL ...in summer 2009 no exact figures were > available..in summer 2010, levels spiked to 3500 MPN/100mL (the > highest in HRM?) and in 2011, levels were down to 600MPN range. > > It should be reason for concern and an opportunity to track imbalances > in the signs of health in lakes and this plant should reasonably, also > be in Whimsical Lake if that lake has gone through the same water > quality disruptions. The plant is the warning of imbalance. Instead of > a purple bladderwort growth or the native floating heart, we get > Cabomba, doing the same as these other plants but doing it more > effectively when there is more nutrient in the water or at lower > oxygen levels in more stress. Recall the outbreak of the "invasive" > yellow floating heart. THis was not a biodiversity crisis but rather a > sign that something was out of kilter. > > Nick > > below attached from HRM 2008 > > > > > > Public Service Announcement > > Frog Pond and Whimsical Lake Water Quality Advisory > > Friday, September 5, 2008 - The public is advised that ecological > water quality samples taken August 25th at Whimsical Lake and the Frog > Pond has detected faecal coliform bacteria levels exceeding provincial > and federal recreational/swimming guidelines. > > Whimsical Lake and the Frog Pond are not HRM supervised beaches. > > These water test samples are taken as part of HRM's on-going > ecological water sampling program to help give long term data as to > the health of 62 sampled lakes and are not part of the weekly sampling > program undertaken at HRM's supervised beaches. > > On Sun, Dec 28, 2014 at 4:20 PM, Dusan Soudek <soudekd@ns.sympatico.ca> > wrote: >> >> This afternoon I had a chance to visit Frog Pond. The amount of floating >> Fanwort (Cabomba caroliniana ??) biomass there is quite impressive, >> particularly along the smallish coves of the northern basin. In places the >> Fanwort zone is several metres wide. Of course, there is no quick way of >> telling how much of the pond's bottom is covered with this plant. >> >> The rhizomes were lush green, but I didn't observe any of the resident >> Black >> or Mallard ducks feeding on them. I briefly checked the nearby pond on the >> other (i.e., southern) side of Purcells Cove Road for Fanwort but didn't >> find any. It may be worthwhile to keep checking other nearby freshwater >> bodies (Whimsical Lake, Cunard Pond, Williams Lake) for spread of this >> invasive plant. >> >> Dusan Soudek >> >> -----Original Message----- From: Burkhard Plache >> Sent: Friday, December 26, 2014 6:35 PM >> To: naturens@chebucto.ns.ca >> Subject: Re: [NatureNS] Frog Pond (Halifax) - Non-native Aquatic >> >> Here is a link to a few photos of the specimens floating in clear water: >> https://www.dropbox.com/sh/5cqlzcbn93wayoh/AABLTH0_OET6amgcDO0bcvR8a?dl=0 >> >> On Fri, Dec 26, 2014 at 11:04 AM, Nicholas Hill <fernhillns@gmail.com> >> wrote: >>> >>> >>> Can you send an image of your aquatic? >>> No reports of Cabomba here that I can see. Have you considered the >>> bladderworts (e.g, purple bladderwort)? >>> Nick >>> >>> On Thu, Dec 25, 2014 at 1:27 PM, Burkhard Plache >>> <burkhardplache@gmail.com> wrote: >>>> >>>> >>>> For a number of weeks now, I had noticed a heavy accumulation >>>> of an aquatic herb at the shoreline of Frog Pond. >>>> Initially I assumed it might be Ceratophyllum (hornwort) or >>>> Myriophyllum (water milfoil), both reported from Nova Scotia. >>>> >>>> However, the plant has opposite leaves, which are fan-like, >>>> finely divided. I am now certain it is a species of Cabomba, >>>> most likely Cabomba caroliniana. >>>> >>>> The species is not native to NS, but used in aquariums. >>>> Maybe this introduction was the result of an aquarium dump. >>>> (Could have happened a few years back when a Gold Fish >>>> or a Koi was seen in the pond.) >>>> >>>> In other regions of the world Cabomba is a problematic >>>> invasive. Is it problematic here as well? >>>> Have people seen this in other parts of Nova Scotia? >>>> >>>> >>>> Wikipedia links to the species mentioned above: >>>> https://en.wikipedia.org/wiki/Ceratophyllum >>>> https://en.wikipedia.org/wiki/Myriophyllum >>>> https://en.wikipedia.org/wiki/Cabomba_caroliniana >> >> >> >> > >
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