Quiz-summary
0 of 5 questions completed
Questions:
- 1
- 2
- 3
- 4
- 5
Information
You have already completed the quiz before. Hence you can not start it again.
Quiz is loading...
You must sign in or sign up to start the quiz.
You have to finish following quiz, to start this quiz:
Results
0 of 5 questions answered correctly
Your time:
Time has elapsed
You have reached 0 of 0 points, (0)
Categories
- Not categorized 0%
- 1
- 2
- 3
- 4
- 5
- Answered
- Review
-
Question 1 of 5
1. Question
Consider the following statements regarding Mangroves.
- Mangroves are very specialised forest ecosystems of tropical and subtropical regions bordering certain sea coasts.
- They stabilise the shoreline and act as bulwark against encroachments by the sea.
- They do not grow in low-oxygen soil.
Which of the above statements is/are correct?
Correct
Solution: b)
Mangroves are a group of trees and shrubs, sustaining in the coastal regions of the planet. These trees grow in low-oxygen soil with slow-moving water.
These ecosystems of tropical and subtropical inter-tidal regions bordering the sheltered sea coasts and estuaries, they stabilize the shoreline and act as a bulwark against encroachments by the sea.
Incorrect
Solution: b)
Mangroves are a group of trees and shrubs, sustaining in the coastal regions of the planet. These trees grow in low-oxygen soil with slow-moving water.
These ecosystems of tropical and subtropical inter-tidal regions bordering the sheltered sea coasts and estuaries, they stabilize the shoreline and act as a bulwark against encroachments by the sea.
-
Question 2 of 5
2. Question
Which of the following are the causes of coral bleaching?
- Sediments such as sand or dirt covering the coral.
- Increased exposure to ultraviolet (UV) radiation.
- Excess nutrients such as ammonia and nitrate from fertilizers and household products entering the reef ecosystem.
- Large amounts of storm water from heavy rains flooding the reef.
Select the correct answer code:
Correct
Solution: d)
What is Coral Bleaching?
The whitening of coral colonies due to the loss of symbiotic zooxanthellae from the tissues of polyps is called as Coral Bleaching.
Zooxanthellae are unicellular algae that provide colour to corals. They also provide food to corals and their deaths lead to breakdown of the symbiotic relationship between them. This breakdown of symbiotic relationship causes starvation and resultant deaths of coral polyps. This condition exposes the white calcium carbonate skeletons of the coral colony. There are a number of stresses or environmental changes that may cause bleaching. These causes include disease, excess shade, increased levels of ultraviolet radiation, sedimentation, pollution, salinity changes, and increased temperatures.
Other causes of coral bleaching include –
- Increased exposure to ultraviolet (UV) radiation;
- Large amounts of storm water from heavy rains flooding the reef;
- The exposure of coral to certain chemicals or diseases;
- Sediments such as sand or dirt covering the coral;
- Excess nutrients such as ammonia and nitrate from fertilizers and household products entering the reef ecosystem.
(The nutrients might increase the number of zooxanthellae in the coral, but it is possible that the nutrient overload increases the susceptibility of coral to diseases.)
Incorrect
Solution: d)
What is Coral Bleaching?
The whitening of coral colonies due to the loss of symbiotic zooxanthellae from the tissues of polyps is called as Coral Bleaching.
Zooxanthellae are unicellular algae that provide colour to corals. They also provide food to corals and their deaths lead to breakdown of the symbiotic relationship between them. This breakdown of symbiotic relationship causes starvation and resultant deaths of coral polyps. This condition exposes the white calcium carbonate skeletons of the coral colony. There are a number of stresses or environmental changes that may cause bleaching. These causes include disease, excess shade, increased levels of ultraviolet radiation, sedimentation, pollution, salinity changes, and increased temperatures.
Other causes of coral bleaching include –
- Increased exposure to ultraviolet (UV) radiation;
- Large amounts of storm water from heavy rains flooding the reef;
- The exposure of coral to certain chemicals or diseases;
- Sediments such as sand or dirt covering the coral;
- Excess nutrients such as ammonia and nitrate from fertilizers and household products entering the reef ecosystem.
(The nutrients might increase the number of zooxanthellae in the coral, but it is possible that the nutrient overload increases the susceptibility of coral to diseases.)
-
Question 3 of 5
3. Question
The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services along coasts like
- Sequester and store coastal blue carbon from the atmosphere
- Food security for many coastal communities
- Protection from storms and sea level rise
- Regulation of coastal water quality
- Provision of habitat for commercially important fisheries
Select the correct answer code:
Correct
Solution: c)
The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services that are essential for climate change adaptation along coasts globally, including protection from storms and sea level rise, prevention of shoreline erosion, regulation of coastal water quality, provision of habitat for commercially important fisheries and endangered marine species, and food security for many coastal communities. Additionally, these ecosystems sequester and store significant amounts of coastal blue carbon from the atmosphere and ocean and hence are now recognized for their role in mitigating climate change.
Incorrect
Solution: c)
The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services that are essential for climate change adaptation along coasts globally, including protection from storms and sea level rise, prevention of shoreline erosion, regulation of coastal water quality, provision of habitat for commercially important fisheries and endangered marine species, and food security for many coastal communities. Additionally, these ecosystems sequester and store significant amounts of coastal blue carbon from the atmosphere and ocean and hence are now recognized for their role in mitigating climate change.
-
Question 4 of 5
4. Question
India is a party to the Ramsar Convention and has declared many areas as Ramsar Sites. Which of the following statements best describes as to how we should maintain these sites in the context of this Convention?
Correct
Solution: d)
The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of wetlands.
Incorrect
Solution: d)
The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of wetlands.
-
Question 5 of 5
5. Question
Consider the following pairs of wetlands and their location
- Kabartal Wetland : Bihar
- Wadhwana Wetland : Punjab
- Harike Wetland : Gujarat
- Renuka Wetland : Himachal Pradesh
Which of the above pairs is/are correctly matched?
Correct
Solution: c)
Wadhwana Wetland is an internationally important wetland situated in Gujarat.
Harike Wetland is located in Punjab
Incorrect
Solution: c)
Wadhwana Wetland is an internationally important wetland situated in Gujarat.
Harike Wetland is located in Punjab
