lake also has become more of a struggle since the subtle venia plants altered his ecosystem sees richard heene goalie a fisherman who grew up in a small community on the shores of the lake the 1st screwing we block sunlight and depletes oxygen from the water suffocate an aquatic life. 70 a is giving us a lot of trouble. it has affected my fishing. activity along here in the past when i went out to fish i would have a good catch for me and my family for me and i thought now it's become really hard for. this morning a group of local residents from design we have come together to clear the invasive plants from the main entrance to the lake the villages are worried it will spread to other sections that have not yet been affected lake is cameron's largest natural lake with a total surface area of nearly 40 square kilometers but it's now infested with what's the most or salvia nearly 40 percent of its surface is covered as it proliferates the plant also threatens the locals livelihoods. a local marine mammal comes of russian organization i'm cool regularly organizes the cleanups for 5 years now the