Civilsdaily
Environment › Marine Ecosystem
In the context of ecosystem productivity, marine upwelling zones are important as they increase marine productivity by bringing the:
(a)
Decomposer microorganisms to the surface
(b)
Nutrients to the surface
(c)
Bottom-dwelling organisms to the surface
(d)
None of the above
(B)
The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?
The mangrove swamps separate the human settlements from the sea by a wide zone in which people neither live nor venture out.
The mangroves provide both food and medicines which people are in need of after any natural disaster.
The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or Tsunami.
The mangrove trees do not get uprooted by storms and tides because of their extensive roots.
(D)