Clayton Lamb Profile picture
Sep 12, 2018 5 tweets 3 min read Read on X
Wilderness is disappearing at an alarming rate. Here I show that the maps created to show our fragments of remaining #wilderness are sadly too optimistic. Green is wilderness (sedac.ciesin.columbia.edu/data/collectio…) red are roads, the orange areas where they overlap are misclassified as wild..
The reason for the disparity is the difficulty in accessing global road layers that have ALL the roads. I gathered state and provincial road layers for BC, AB, WA, ID, and MT here to show how the generic road layers used in the wilderness maps do not portray remaining #wilderness
Here's an idea why this matters for #GrizzlyBear:
researchgate.net/publication/32…
And another line of inquiry; roads related to fewer bears when they are open to the public, but road closures help a threatened population recover:

besjournals.onlinelibrary.wiley.com/doi/full/10.11…
@ben_a_goldfarb this was what I was talking about on the phone RE wilderness maps not lining up with REAL road layers

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More from @ClaytonTLamb

Sep 13, 2018
Green is "Last of the Wild" map. Now overlay BC and AB roads and seismic lines..🤔
The overall discrepancy
Is this just an artefact of plotting, i.e, road/seismic appear wider when zoomed out? Thats a no, the landscape is heavily impacted and is not #Wilderness. Canada needs a new #Wilderness map
Read 4 tweets
Sep 12, 2018
Roadkill is a serious problem. Plus does it cascade to more roadkill as carnivores feed on it? The good news is researchers want to know and are working to find out. Stay tuned for pics.
Update: moose fully scavenged and buried
#grizzlybear were not kidding around when they went at this moose. Blood splatter on the camera
Read 5 tweets
Jul 17, 2018
NEW PAPER: A scientific consensus: the impacts of roads and human access on #grizzlybear and what we can do to fix the problem.

researchgate.net/publication/32…
Firstly, I'd suggest checking out the report just to view the amazing graphic design by @kate_sciart:
The story is simple, and compelling.

👉There are nearly 1 million km of resource roads accessing grizzly bear habitat in BC and AB. For reference, the earth is only 40,000 km in circumference.

👉See graphic for why this is bad for bears
Read 12 tweets

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