SNC1D Science Journal

A limiting factor is a factor that affects the population and distribution of an ecosystem. Ecological issues like mercury poisoning in humans because it gets into fish have many limiting factors. Some limiting factors include…

Mining

Mining is a limiting factor because when miners do their job they cause mercury and coal levels to rise. When that mercury gets in the air it then also gets in the water. Mercury goes from air to water from things like precipitation. Fish then absorb this and can die from too high levels because mercury is a highly toxic element. We humans also eat this fish and can die. So all together mining affects aquatic creatures population and humans

Factories

Factories are a limiting factor because factories usually dump dirty water a lot of oils and chemicals into water sources, usually community ones. They get dumped into bodies of water like lakes and rivers. This can poison all aquatic creatures, which can affect the aquatic population.

People Eating Seafood

Did you know around 3 billion people have to depend on wild-caught and farmed seafood to live? This affects the aquatic and human populations. Humans get affected by the mercury and other bad toxins in fish. While fish and other sea creatures populations are also going down because these creatures are in high demand of food.