It's the fact that the wolverine is so intolerant of human disturbance.
Because human disturbance of desert vegetation commonly involves the partial or total removal of the shrub cover, the impact of human disturbance on these ecosystems is significant.
"The fast dudes like mice are incredibly resilient in the face of human disturbance," he said.
Soil, human disturbance, and other factors also can be important controlling influences.
There used to be several thousand lapwings in Northern Ireland but changing agricultural practices and human disturbance have reduced the numbers to just a few hundred.
The analysis defined wilderness as places that are "ecologically largely intact" and "mostly free of human disturbance", though some have indigenous people living within them.
They argued that since only 5% of the country's land area was set aside for wildlife, it should be free of human disturbance.
Other birds, like the least and common terns and black skimmers, are not faring as well, probably because of development and human disturbance, Mr. Jenkins said.
A century of human disturbance, however, has left the trapdoor spider and the cave's fauna in a potentially tenuous state.
Only minor human disturbance is recorded.
Channel width was also related to human disturbance.
