Viewing my route in Google Earth, and applying my newly gained knowledge, it's relatively easy to differentiate among the different types of cover found along this ridge. There are thickets comprised mostly of stunted and densely packed Spruce and there are areas where mature deciduous trees dominate. Images three and four clarify the distinction with outlines around the dense thickets. Outside of the outline you can make out individual trees. Inside there are thousands of small trees, mostly spruce, jammed together in a nearly impenetrable thicket.
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| Image 1: The Fishing Brook Range. The pink line is the boundary between Forest Preserve and private land. The distant marker is the summit of Fishing Brook Mountain. (Source: Google Earth) |
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| Image 2: The contrast between thickets and the more open deciduous forests starts to be visible. The tops of individual trees can be seen in the more open areas. (Source: Google Earth) |
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| Image 3: The dense cover areas have a distinctive look when compared with the surrounding forest. (Source: Google Earth) |
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| Image 4: A closer view from a slightly different angle. A practical route along the ridge would stay to the left and avoid the thicket areas such as the one marked by the outline. (Source: Google Earth) |
Ole 3400
I had set off to try to reach the top of the unnamed 3400 foot peak south east of where the Northville Lake Placid Trail (NLPT) reaches its' high point near Long Lake. The trail crosses a ridge at just over 3000 feet and it’s a pleasant 3.5 mile walk to this height of land (south from Rte 28N). I've hiked in this area many times and I've been intrigued by the ridge that runs from the trail to the summit of Fishing Brook Mountain. Getting to the height of land by trail is easy. But from there it's a 4.5 mile bushwhack to the summit of Fishing Brook Mountain. Along the way are several smaller peaks and a couple high elevation ponds that I'd like to see close up. This is wild and little visited country. |
| Image 5: Along the ridge on a previous outing. October 2013. |
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| Image 6: Spruce thicket along the ridge. |
My recent hike was a test of the feasibility of making a longer trip along the ridge. And a test run turned out to be a wise thing to do. I didn't make it to the top of even the first peak along the ridge. Just a mile from where I left the trail I was turned back by rough terrain, the limited daylight of a late October day, and those spruce thickets previously mentioned and shown in image six.
I did keep a GPS track of my hike and when I overlaid the route I followed on the satellite image the areas to avoid became visible. The spruce thickets look different than the areas where the forest is more open. I might have guessed at these distinctions before the trip but now I have no doubt. If it looks like the areas outlined in images three and four, go around. And this is not too surprising. In the Adirondacks, the ecological transition zone between 3000 and 3500 feet tends to be a particularly difficult place to travel. A lesson that I relearn every few years.
I did keep a GPS track of my hike and when I overlaid the route I followed on the satellite image the areas to avoid became visible. The spruce thickets look different than the areas where the forest is more open. I might have guessed at these distinctions before the trip but now I have no doubt. If it looks like the areas outlined in images three and four, go around. And this is not too surprising. In the Adirondacks, the ecological transition zone between 3000 and 3500 feet tends to be a particularly difficult place to travel. A lesson that I relearn every few years.
As for Fishing Brook Mountain, making the summit by following the ridge is rather serious undertaking. A much more feasible route would be to stay at a lower elevation in deciduous forests on north side of the ridge. Image seven shows the area as seen from the south. The red line on the left is the NLPT and the light red lines delineate the boundary between Forest Preserve and private lands. Based on my ground truthing the lighter green areas are deciduous forests while the darker greens are conifer dominated forests.
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| Image 7: The area as it would appear if viewed from from an airplane flying south of the ridge line Route 28N is visible along the top of the image. Long Lake is off image to the left; Newcomb to the right. (Source: Google Earth) |
Satellites and Sensors
Digital images like the ones we view in Google Earth are actually a form of sensor-gathered data. A digital camera contains a light sensitive sensor divided into a grid of cells organized into rows and columns (commonly called pixels). When an image is made the sensor assigns a number to each cell. These numbers represent the color and intensity of the light striking each cell and those numbers are saved to a file. When you view the image the numbers are converted back to the appropriate colors for display. Modern image sensors have millions of cells and can differentiate among millions of distinct colors.
Larger sensors record values for more cells and this is one of the factors that determines the quality of a digital image. Generally speaking, more expensive cameras contain larger sensors and produce higher quality images. But sensor size is not the only factor that determines image quality. The lens system of the camera focuses the light on the sensor so lens quality imposes a limit on the amount of detail that a sensor can resolve. For satellite imagery the number of pixels in the sensor, and the quality of the lens, are main limiting factors on the level of detail we can see in the final images.
Ecological Succession and Environmental History
For the purpose of picking better hiking routes we can analyze the data simply by viewing the imagery in Google Earth (or other similar systems). Combined with a bit of on-the-ground experience it's relatively easy to see differences in the types of ground cover and terrain. But what about more subtle distinctions? What if I wanted to differentiate among the ecological communities present in an area? The distinctions between communities can be subtle and it oftentimes comes down to recognizing species assemblages that we are not going to visible in satellite imagery. We can make broad assessments from satellite gathered data; the communities present in a spruce thicket will be different from communities found in deciduous forest. But recognizing the more subtle distinctions requires additional data and commonly that data has to come from poking around on the ground.
My interest is in ecological succession and how ecological communities change over time. At any given place, the assemblage of species present will be governed by soil, climate, topography and disruption. You don't find flamingos in the Adirondacks but you do find different types of trees on north facing slopes as compare to south facing slopes just a short distance away. Over time the communities present at a location will reach an equilibrium but even that climax state shifts over time in response to changes in the larger environment. On top of this, very few locations in the Adirondacks are at the equilibrium state because of disruptive events that include logging, fires, storms and disease outbreaks. The Adirondack forests we see today are not what existed 250 years ago.
Digital images like the ones we view in Google Earth are actually a form of sensor-gathered data. A digital camera contains a light sensitive sensor divided into a grid of cells organized into rows and columns (commonly called pixels). When an image is made the sensor assigns a number to each cell. These numbers represent the color and intensity of the light striking each cell and those numbers are saved to a file. When you view the image the numbers are converted back to the appropriate colors for display. Modern image sensors have millions of cells and can differentiate among millions of distinct colors.
Larger sensors record values for more cells and this is one of the factors that determines the quality of a digital image. Generally speaking, more expensive cameras contain larger sensors and produce higher quality images. But sensor size is not the only factor that determines image quality. The lens system of the camera focuses the light on the sensor so lens quality imposes a limit on the amount of detail that a sensor can resolve. For satellite imagery the number of pixels in the sensor, and the quality of the lens, are main limiting factors on the level of detail we can see in the final images.
Ecological Succession and Environmental History
For the purpose of picking better hiking routes we can analyze the data simply by viewing the imagery in Google Earth (or other similar systems). Combined with a bit of on-the-ground experience it's relatively easy to see differences in the types of ground cover and terrain. But what about more subtle distinctions? What if I wanted to differentiate among the ecological communities present in an area? The distinctions between communities can be subtle and it oftentimes comes down to recognizing species assemblages that we are not going to visible in satellite imagery. We can make broad assessments from satellite gathered data; the communities present in a spruce thicket will be different from communities found in deciduous forest. But recognizing the more subtle distinctions requires additional data and commonly that data has to come from poking around on the ground.
My interest is in ecological succession and how ecological communities change over time. At any given place, the assemblage of species present will be governed by soil, climate, topography and disruption. You don't find flamingos in the Adirondacks but you do find different types of trees on north facing slopes as compare to south facing slopes just a short distance away. Over time the communities present at a location will reach an equilibrium but even that climax state shifts over time in response to changes in the larger environment. On top of this, very few locations in the Adirondacks are at the equilibrium state because of disruptive events that include logging, fires, storms and disease outbreaks. The Adirondack forests we see today are not what existed 250 years ago.
The north side of Fishing Brook Mountain bears forests at varying stages of succession aligned with the effects of disruptive events that have occurred in the last 120 years. Most of the ridge has been logged, some places more than once. There have been fires of varying sizes. There have been storms such as the hurricane of 1950, the derecho storm in 1995, and the ice storm of 1998. And currently the forests are being altered by non-native diseases and insects. In particular, Beech Bark Disease has killed the majority of large American Beech trees previously present in this area.
The variable matrix of forest stages present on this ridge became evident to me as I struggled along the ridge on my hike. In places I would break out of the dense thickets into open areas with a low cover comprised mainly of ferns and a canopy dominated by large Yellow Birch (Betula alleghaniensis). Neither of these community types are likely to be climax communities and the pattern of occurrence seemed unnatural as well. Teasing out the sequence of events and transitions that led to the current pattern is in the realm of environmental history. To me these little patches have an interesting story to tell. This is a topic I plan to return in upcoming posts.
Note:
The variable matrix of forest stages present on this ridge became evident to me as I struggled along the ridge on my hike. In places I would break out of the dense thickets into open areas with a low cover comprised mainly of ferns and a canopy dominated by large Yellow Birch (Betula alleghaniensis). Neither of these community types are likely to be climax communities and the pattern of occurrence seemed unnatural as well. Teasing out the sequence of events and transitions that led to the current pattern is in the realm of environmental history. To me these little patches have an interesting story to tell. This is a topic I plan to return in upcoming posts.
There are several recognized communities that include Yellow Birch but the stands on this ridge are most likely the result of some past disturbance.
