After my recent trip to Vancouver Island, where I saw these wonderfully cute creatures in the wild, I was eager to take a dive into the world of the Sea Otter, a species with three subspecies. We also take a look at keystone species, what they are, how they affect the ecosystemShort Definition An ecosystem is a community of living organisms interacting with one another and with the non-living parts of their environment, such as water, soil, air, sunlight, and temperature.... More and some examples of them.