Question

The rivers that feed a particular inland sea were diverted to irrigate a nearby desert so that the desert could be used to cultivate cotton. Uncontrolled irrigation resulted in a drastic decrease in the size of the sea, and eventually the sea dried up completely. Many aquatic populations were lost, and the land left behind was covered with salt.
Which of the following solutions would best help restore the ecosystem and prevent it from becoming a desert?
A.
Direct sewage runoff water from local cities into the ecosystem to provide it with nutrient-rich water.
B.
Reconstruct the irrigation system so that water from the river is allowed to enter the ecosystem.
C.
Add synthetic fertilizer to the remaining soil in the ecosystem so that soil fertility increases.
D.
Plant cotton crops in the ecosystem and grow the same crop for at least a decade.

Answer 1

Answer:

The best option here is B)

To reconstruct the irrigation system so that water from the river is allowed to enter the ecosystem.

Explanation:

Without water, there is no life. It doesn't matter how nutrient-rich the place becomes.

Sewage run-off water is completely out of question. Sewage at this point will serve to increase the richness of the area. Besides, sewage contains various other compounds such as methane which may not be suitable for aquatic life.

The best next step is to restore water into the region then gradually re-enrich it's nutritional potential. As the eco-system becomes more suitable for Plankton other higher forms of aquatic life will flow through from the river into the eco-system.

Planktons are a diverse group of organisms which live in large water bodies and can not swim against a current. The plankton comprising individual species are called plankers. Both smaller and larger aquatic species, such as bivalves, fish, and whales, are supplied a vital source of food.

Cheers!

Answer 2

The best solution that would help restore the ecosystem and prevent it from becoming a desert is by adding synthetic fertilizer to the remaining soil in the ecosystem so that soil fertility increases.

Answer: Option C

Explanation:

For the above problem mentioned, the best way through which the lost ecosystem can be restored is by making use of synthetic fertilizer. These are the inorganic fertilizer which are man made. The reason why synthetic fertilizer will work best is because;

• They act very fast as compared to other organic products.

• In situations like this, where plants face nutrition deficiency, synthetic fertilizer acts as savior by providing adequate nutrition.

• They provide a very steady and continues feeding.