Name the type of ecosystem represented by the above food web

d)
If all the small fish were killed, two short-term effects on the ecosystem would be:

1. The populations of snakes and hawks would decrease due to a reduced food source.
2. The population of phytoplankton would increase due to the removal of their predator.

e)
Oil spills lead to the death of fish primarily by forming a layer on the water surface. This layer:

• Prevents atmospheric oxygen from dissolving into the water, leading to a reduction in dissolved oxygen levels, which fish need to breathe.
• Can coat the gills of fish, impairing their ability to absorb oxygen from the water.
• Is toxic and can directly poison fish.

f)
One other cause of water pollution apart from oil spills is sewage/domestic waste.

3 zimekamilika, zimebaki 2 leo. Unapiga hatua.