1
Whenever humans introduce a new species into an ecosystem where it doesn't belong and without the appropriate care , it will most likely cause a change in the ecosystem
2
Hunting is a practiced in many countries for commercial and sporting reasons
3
expel ash, rocks and lava and grvely damage many animals and plants that are part of a food chain
4
are times whne the global temperature of the earth´s surface decreases, which causes the migration of animals and the extinction of species that don not to adapt to the new environmental conditions
5
This intervention can gravely damage the food chains and systems that are part of the ecosystems by eliminating the producers
6
are caused when the amount of water neccesary for living things to survive is not available
7
can leave plants and animals submerged in water, thus altering their food chains
