"Fragile ecosystem" refers to a delicate and easily affected natural environment, where even small changes or disruptions can have a big impact on the balance and health of the ecosystem. Full definition
Therefore, feral animals and plants can cause disruption or extinction to some indigenous species, affecting wilderness and other fragile ecosystems. (sciencedaily.com)
Global warming threatens to change that whole fragile ecosystem even faster than in the rest of the world. (greenplanetfilms.org)
Unfortunately, that could lead to a collapse of certain fragile ecosystems. (oregontour.org)