Even during the initial development of
agriculture and expansion of human populations, the scientists could detect a shift in the structure of species co-occurrence, perhaps suggesting that species were not able to migrate
as easily as they did for the previous 300 million years.
While trying to determine whether a forest was felled above the legal yield can be tricky, conversion of forest to
agriculture can be detected fairly
easily from satellite imagery, and tools such
as Global Forest Watch allow anyone with an internet connection to access remote - sensed images of forest losses and gains.