Dr. Watmough explains implications of calcium losses on lake ecosystems.
As mentioned last month in this cottageinmuskoka blog entry and this news story from the Huntsville Forester (Cottage Country Now), the decline of calcium in our lakes can affect our lakes recovery from acid rain as well as zooplankton in our lakes, which are are very sensitive to declining calcium levels.
This is interesting information of value not only for those who own a cottage in Muskoka, but all of us who live in or visit Muskoka. In the presentation Dr. Shaun Watmough of Trent University helps us understand:
Why should we care about calcium in the environment?
How are calcium levels in lakes, vegetation and soils changing?
What is causing these changes?
What will be the impact of timber harvesting on lake calcium levels?
What are the critical uncertainties?
Declining calcium slows the recovery of acidic lakes.
Even if you aren’t paddling in the event, it’s an … ahem… Great Experience to watch.
This Saturday, at Annie Williams Park in Bracebridge, come out and see why The Great Muskoka Paddling Experience has become an epic one in Ontario paddling and beyond.
– Muskoka Watershed Council media release: story
– Town of Bracebridge media release: story
– What’s Up Muskoka : story
– Muskoka Magazine: story (scroll down a page).
– Bracebridge Weekender: story
Mentioned in a number of Muskoka Watershed Council lectures over the past few years, calcium decline in Muskoka Lakes and in particular, the consequences of timber harvesting on lake calcium levels have been hinted at as a potential direct cause of declining health of our lakes in Muskoka. Here’s a past primer news story from the Huntsville Forester (Cottage Country News).
This week, we have an opportunity to discover more.
Dr. Shaun Watmough, an Associate Professor in the Environmental Resource Science Program at Trent University in Peterborough will present.
Here is a synopsis of the lecture:
Decades of acid deposition have depleted soil calcium reserves and, when combined with timber harvesting, predicted losses of calcium from soil are considerable and may ultimately threaten long-term forest health and productivity and lead to negative impacts on lakes.
In this talk, Dr. Watmough will provide an overview of our current understanding of calcium biogeochemistry and describe the reasons for the widespread decline in calcium levels in lakes and the implications of calcium losses on soil fertility and forest health in addition to impacts on lake ecosystems.
With an emphasis on south central Ontario, Dr. Watmough will document a nutrient budget for a selection harvesting regime in central Ontario hardwood forests. This work is then extrapolated to regional harvesting activities and management issues are discussed.
The lecture is this Thursday, October 10, 2013 from 7:00 – 9:00 pm at Nipissing University – Muskoka Campus, 125 Wellington Street, Bracebridge, P1L 1E2. As always, admission is by donation
I’ve just finished post-processing and editing this video for the Great Muskoka Paddling Experience. This event, held annually on the Saturday of the Thanksgiving weekend is a great opportunity for anyone – even if you don’t have a canoe or kayak, you can rent one there – to get out on the water for perhaps the last time of the year. It was a fun video to shoot and create and I hope it captures just how much fun the event can be.
The Great Muskoka Paddling Event benefits the Muskoka Watershed Council and helps give them a bit more of a budget to do important work. It’s a really well organized event and fun for all ages, and all levels of paddling experience.
Did you know that Gravenhurst Bay in Lake Muskoka is 4 to 5 times cleaner than it was 1970?
Did you know that everyone alive in the 70’s had toxic levels of lead in their blood?
Did you know that Muskoka has only half as many acid lakes as it once did?
Well, how about this then: if it wasn’t for the life in lakes, we would all be blind, deaf , stupid and dead.
To be blunt; we would all be blind, deaf , stupid and dead if it wasn’t for the life in lakes.
From the Muskoka Watershed Council Lecture Series I have just finished editing and have just posted this video on the Muskoka Watershed Council’s YouTube page.
Dr. Norman Yan, an extremely engaging speaker, revisits some past environmental successes, what we have learned and the steps we need to take to solve today’s environmental problems.
Learn how the reduction of phosphorus resulted in a clean up in Gravenhurst Bay while the International Joint Commission was still debating whether its carbon or phosphorus that spikes algal growth? This local Muskoka cleanup helped convince the world that phosphorus is the cause of cultural eutrophication. This phenomena is of increasing concern as population grows and the climate heats up; after all, we learned from this lecture, that algae really love heat.
Current photo of lake in China where people swim in an algal bloom.
Revisit the change to unleaded gas which got the toxic levels of lead out of our blood. Dr. Yan also discusses the many benefits of the ban on DDT, as well as the immediate benefits of the recent Ontario ban of cosmetic pesticides and herbicides. Also be sure not to miss houses disappearing from view as the Sudbury environment improves over 40 years!
All of us should be familiar with the fact that in Muskoka, our environment is our economy; over half our GDP comes from tourism and cottaging. In this lecture, Peter Sale attempts to convince us that our environment is far more than our economy.
Every year some 5 billion cubic metres of water pass through Muskoka – that’s 3 1/2 times the entire volume of Lake Muskoka. Half is evaporated or transpired by Muskoka’s forests and plants, the other half – some 2.5 billion cubic metres flows into Georgian Bay. As climate change affects Muskoka – producing warmer and wetter winters, but dryer summers with more intense storms – we may be trying to find ways to hold on to that water, just a little longer; maybe the beaver has a solution for us.
Peter, who describes himself as a strange, but harmless ecologist, talks about some of the many creatures in Muskoka including the beaver, the expected effects for Muskoka from climate change, an idea or two on solutions, and that there are other ways of valuing our environment other than simply to value it as a storehouse of resources to dig up and take away.
To have your customers recognize the lengths that you will go to, to take care of them – isn’t that the kind of testimonial we would all love to get, as thanks for what we do? An acknowledgement that our product or service accomplished exactly what was needed or desired, and performed under conditions and with such skill, that the customer couldn’t/wouldn’t take it on themselves. Well, “Working in the cold and dark to fix the problem.” is one of Stevenson’s Plumbing and Electric client’s comment of thanks.
I love to recommend good people. And in this case, not just because they have done excellent work on huge and small jobs throughout Muskoka (I know – many, many of our cottage clients are big fans); everything from complete builds to emergency repairs and the annual closing and opening of the cottage in Muskoka. But because they contribute to our quality of life in countless other ways. I couldn’t begin to list the ways and the events that the Stevenson’s have contributed to the Muskoka community; it wouldn’t do them justice. It is quite simply countless. They invest, and are invested in our community.
This is a family owned and operated business with trucks full of good people and gizmos all over Muskoka.
As mentioned in previous posts, cottage owners and cottage buyers want to know about water quality on lakes in Muskoka. Because water quality has a direct relationship to property value, and algae – particularly algal blooms – directly affect water quality, we all want to know as much as we can .
I just completed and uploaded a video here for the Muskoka Watershed Council YouTube page. The subject is a talk that was presented by Dr. Andrew Paterson of the Dorset Environmental Centre at the Muskoka Stewardship Conference at Nipissing University in Muskoka (Bracebridge). The event’s theme was What Are You Watching?
This highly interesting talk looks at studying lake sediments deposited over hundreds – and even thousands of years. Sediments are archives of environmental change and within them are clues to possible triggers of algae outbreaks.
Dr. Paterson talks about sediment research done in Lake of the Woods in north-western Ontario and the Hudson Bay Lowlands which may help scientist understand occurrences in the lakes of Muskoka. There is discussion on the relationship between water quality and property value for cottagers. The seeming paradox of stable or even declining phosphorous levels – the usual algal bloom suspect- at the same time as blue-green outbreaks are increasing. And of course, the effect of climate change.
Algal Bloom Three Mile Lake 2005
Of particular note is the 2005 toxic algal bloom in Three Mile Lake in 2005, where research may indicate the possible triggers of record high temperatures coupled with record low precipitation which occurred in the fall of 2005 in Muskoka.
There is significant evidence that a warming climate is related to the increase in algal blooms. Dr. Paterson suggests that if algae was the music that we hear from a radio: then phosphorous is the volume; other nutrients (particularly nitrogen), light, etc., influence what species are present – are the “tuning”; and climate is the antenna. The presentation concludes that blue-green algae likes it hot!
These north Lake Muskoka clients are doing well so far, but holding their breath. They consider themselves very fortunate.
Many have fared worse, we just finished a conversation with Walker’s Point, Lake Muskoka cottagers whose entire 2 dock system has lifted right off the cribwork. “We are hoping that it sets itself right back in place when the water recedes. At least it’s still there; we’ve seen a few float by.”
We are having some crazy weather here – like many other places. Strong winds with above-seasonal temperatures overnight. At 7:00 am this morning it was 16C, the expected high tomorrow only 1C. It was all enough to make the ice on Lake Muskoka disappear!
Look at the two images below; essentially the same view separated by three weeks.
