One way to better understand stressors to an environment is to know how to categorize them. Stressors can generally be broken down into eight categories:
natural vs anthropogenic
biotic vs abiotic
chronic vs acute
global vs local
Watch the following video to learn more about these categories.
When you are done, try to categorize the following stressors on your own!
Sedimentation
Greenhouse gas emissions
Dredging
Sewage
Sea level rise