The negative consequences of human activities in natural ecosystems result in the degradation and depletion of natural habitats, which has led to the endangerment and extinction of many wild species and their natural habitats.
Over the past 50 years, human activities have changed and affected ecosystems faster and more drastically than in any other period in the history of our planet. It is estimated that more than 60% of the world’s ecosystems are degraded in modern times (Millennium Ecosystem Assessment 2005).
The greatest threats to biodiversity coming from human activities are destruction, fragmentation and degradation of habitats, climate change, over-exploitation of wild species, introduction of invasive species, and accelerated spread of infectious diseases. The most endangered species face at least two or more of these threats.
The problem is that these threats develop so rapidly and are so widespread that wild species do not have enough time to adapt to new changes or to migrate to areas with better conditions. Very often, threats act simultaneously in synergy, so they have much more negative effects than they would have if acting individually.