A D V E R T I S E M E N T

In our continuing series of articles about species interdependence, we consider the theme of ecosystems, and the effects of species loss due to various forms of human encroachment. "Encroachment" means going beyond the boundaries of what may be considered another species's habitat or domain. The domain in question can be that of animals as well as of humans. It can also encompass cultural practices that have persisted for hundreds or even thousands of years involving certain species—practices which are no longer viable because the balance that maintained the variable dynamic between traditional culture and species survival has been thrown off course.