Identifying human-caused landscape change is challenging, however, and requires combining high-resolution physical proxies with detailed historical records from the same locality.
I pointed out that the human-caused landscape changes they could see around them (from timber to farms to timber again) was in fact an almost wholly unregulated phenomenon, the natural outgrowth of changing market values and environmental norms.
Since most of the landscapes worldwide are covered by road networks and various human objects, the marking behaviour of wild mammals may be profoundly changed due to human-caused habitat modifications.
In contrast, the flattening of ecological gradients, such as that caused by human landscape modification, may weaken the strength of divergent selection.
(The "State of the Climate" press release also skipped any mentions of human-caused change).
Cyclical climate variations would have dried out the landscape some, but human-caused climate change on top of those patterns caused this drying process to double.
Coastal sandy ecosystems are increasingly being threatened by human pressure, causing loss of biodiversity, habitat degradation and landscape modifications.
Overall, relatively little of the landscape was secure from human-caused mortality for grizzly bears.
However, we emphasize the role of roads as a potential cause of increased human-caused mortality.
At Mr. Buffett's behest, they agree to join forces to fundamentally transform America's economic, political and social landscape before another natural or human-caused apocalypse strikes.
Overall, lion movements suggested an ability to partition their activities spatiotemporally with those of humans such that risk of human-caused mortality was minimized while use of a human-dominated landscape was maximized.
