Environment › Marine Ecosystem

Which of the following best explain(s) the rationale for protecting mangrove ecosystems in the context of climate resilience?
1. Mangroves reduce tidal energy and store freshwater, making them ideal sites for paddy cultivation in saline estuarine belts.
2. Their salt-sensitive roots filter seawater, making mangroves key to converting coastal land into freshwater aquaculture zones.
3. By withstanding tidal surges and offering biomass resources, mangroves function both as natural bio-shields and livelihood bases for rural communities.

Consider the following kinds of organisms:
1. Copepods
2. Cyanobacteria
3. Diatoms
4. Foraminifera
Which of the above are primary producers in the food chains of oceans?

What is blue carbon?

Which one of the following is a filter feeder?

Consider the following statements :

1.Most of the world’s coral reefs are in tropical waters.
2.More than one-third of the world’s coral reefs are located in the territories of Australia, Indonesia and Philippines.
3.Coral reefs host far more number of animal phyla than those hosted by tropical rainforests.
Which of the statements given above is/are correct ?

With reference to ‘dugong’ a mammal found in India, which of the following statements is/are correct?
(1) It is a herbivorous marine animal.
(2) It is found along the entire coast of India.
(3) It is given legal protection under Schedule I of the Wildlife (Protection) Act 1972.
Select the correct answer using the code given below.

Which of the following have coral reefs?
1. Andaman and Nicobar Islands
2. Gulf of Kachchh
3. Gulf of Mannar
4. Sunderbans
Select the correct answer using the code given below:

Consider the following animals:
(1). Sea cow
(2). Sea horse
(3). Sea lion
Which of the above is/are mammal/mammals?

What would happen if phytoplankton of an ocean is completely destroyed for some reason?
1. The ocean as a carbon sink would be adversely affected.
2. The food chains in the ocean would be adversely affected.
3. The density of ocean water would drastically decrease.
Select the correct answer using the code given below:

The acidification of oceans is increasing. Why is this phenomenon a cause of concern?
1. The growth and survival of calcareous phytoplankton will be adversely affected.
2. The growth and survival of coral reefs will be adversely affected.
3. The survival of some animals that have phytoplanktonic larvae will be adversely affected.
4. The cloud seeding and formation of clouds will be adversely affected. Which among the statements given above is/are correct?