Thursday, December 8, 2016

Making New Discoveries...McCune Nature Preserve


Long after I visit a nature preserve, I continue to think about it as I desire to understand what natural factors came together to create the beauty I observed. The same can be said of McCune Nature Preserve in Petoskey as after my visit last Sunday, I found myself looking at websites and books that could explain the preserve. And of course, once you start to look into one aspect of the natural world, the story grows deeper with one question leading to the next. Soon enough I was trying to wrap my head around all the different natural communities found within the state of Michigan and which ones could be found at McCune.


From McCune's parking lot off Maxwell Road, you enter a Mesic Northern Forest and then descend into a Rich Coniferious Swamp as you move toward Minnehaha Creek. Both of these types of natural communities are found north of the climatic tension zone which runs in Michigan from Bay City to Muskegon, separating the northern forests of the state which contain a higher percentage of conifers, from the south which contains less.

Nobody really knows why this zone exists but it is believed to be due to a difference in soils, the north containing sandy soil which support conifers while the south containing clay rich loamy soil that works for hardwoods. This difference in forests between the north and south is what creates the "up north" feeling in our state. As one crosses over the climatic tension zone and more conifers are observed in the landscape, there is a feeling of getting away from it all as the world takes on a completely different look from what you would find downstate.


McCune's conifer swamp is made accessible with the use of boardwalks, transporting the visitor atop the wet areas down to the creek, passing by northern white cedar and balsam fir along the way. Because of the anaerobic conditions within the soil due to a high water table, the trees are shallow rooted and susceptible to windthrow, resulting in many fallen trees which we noticed along the path. 


Upon reaching the creek, there is a long wooden bridge which leads to a nice bench for which to rest and contemplate the wildness around you. The area in and around the bridge has a messy quality about it with all the fallen trees but it is a natural component of swamps. Because the human created world is so tidy, I can forget that there is a rhythm and reason to why nature does things. If only I could strive to live a more nature inspired life!


As my husband and I made our way back up from the creek, we found ourselves in what would be called a Mesic Northern Forest with its canopy, understory, shrub and herbaceous layers. Because the area was at one time logged, this forest is not yet mature and there are many pioneer trees such as the aspen which you can see in the first picture above. In the distance as we were departing the park, we could see a gently sloping hill, a moraine created long ago as a glacier dropped its debris,while the land we were standing on was the outwash plain, the area where the melting glacial waters ran.

Everything in nature is connected and happens for a reason I am discovering. Just like on a hiking trail, one path leads to the next. Same goes for trying to understand nature - one question leads to the next and the next and the next. I'm currently plagued by trying to understand why Michigan's soil is sandy in the north and not the south. I believe it is due to glacial action, but why was sand dropped in the north primarily? In time this discovery will be made as well...


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Monday, December 5, 2016

The Story of my Landscape...



As I walk along a path near my home, I can gaze up into the hills of the Boyne Highlands or Nub's Nob ski areas and enjoy the beauty of the varied terrain around me. What helps to better connect me to this land though, is to create a sense of place, to understand how these hills came to be. As a young girl studying Michigan history in school, we learned all about the great sheets of ice that covered our land which created its varied topography and lakes. We never got into the more in depth specifics regarding the mechanics of how the glaciers worked their magic and thus never came to understand words such as recessional moraines or outwash plains. Words which give better meaning to what I am looking at or walking upon as I take a stroll out my door.



As glaciers advanced over Michigan 10,000 to 12,000 years ago, they took the path of least resistance, widening river valleys to form today what is known as the Great Lakes. As these glaciers moved over the land, they operated as a conveyor belt, scooping up debris as they went along, not bulldozing the land as you would think, and then as they melted and began to retreat, hills and valleys were created through this melting as they dropped the debris they had picked up along the way.


As the ice sheets melted, their retreat was done in a stop and go fashion. When they stopped, the glacier dropped the material it was holding known as glacial till. This till as it was deposited, formed hills known as recessional moraines such as what you'd find at Boyne Highlands or Nub's Nob. The flatter areas in front of the moraines were known as outwash plains, where the melting water containing smaller particles of debris such as sand, moved away from the moraines. This is a very simplistic explanation of the process of glaciers and the story of how my local landscape was formed, but to me I find it interesting to begin to connect the dots of how things came to be. To begin to understand why the soil under my feet is comprised of sand or why some places are hilly while others are not. 


Now, as I walk along the path near my home, I no longer just see hills and valleys, but think instead of the huge glaciers that carved out the story of my landscape. There is much more to learn and so many questions to be unlocked regarding this story but that is what gets me out the door over and over again. 

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