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The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services along coasts like
1. Regulation of coastal water quality
2. Sequester and store coastal blue carbon from the atmosphere
3. Protection from storms and sea level rise
4. Provision of habitat for commercially important fisheries
5. Food security for many coastal communities
Select the correct answer code:
  • a)
    1, 2, 3
  • b)
    1, 3, 4, 5
  • c)
    1, 2, 3, 4
  • d)
    1, 2, 3, 4, 5
Correct answer is option 'D'. Can you explain this answer?
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The coastal ecosystems of mangroves, tidal marshes, and seagrass meado...
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.
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The coastal ecosystems of mangroves, tidal marshes, and seagrass meado...
Benefits and Services Provided by Coastal Ecosystems

Coastal ecosystems such as mangroves, tidal marshes, and seagrass meadows play a crucial role in maintaining the health and well-being of coastal regions. They provide numerous benefits and services that are essential for the functioning of these ecosystems and the communities that rely on them. The correct answer is option D, which includes all the benefits mentioned in the question.

1. Regulation of coastal water quality:
Coastal ecosystems act as natural filters, removing pollutants and excess nutrients from the water. Mangroves, tidal marshes, and seagrass meadows help in reducing the levels of sediment, nitrogen, and phosphorus, thereby improving water quality. These ecosystems also contribute to the prevention of harmful algal blooms and protect the health of marine organisms and human populations.

2. Sequester and store coastal blue carbon from the atmosphere:
Coastal ecosystems are highly efficient in capturing and storing carbon dioxide from the atmosphere. Mangroves, tidal marshes, and seagrass meadows are known as "blue carbon" ecosystems because they have the ability to sequester large amounts of carbon. This helps in mitigating climate change by reducing greenhouse gas emissions.

3. Protection from storms and sea level rise:
The dense roots and vegetation of mangroves, tidal marshes, and seagrass meadows act as natural barriers against storm surges and coastal erosion. They help to dissipate wave energy and reduce the impacts of storms, protecting coastal communities, infrastructure, and valuable ecosystems. These ecosystems also play a vital role in adapting to sea level rise by trapping sediments and building up the elevation of coastal areas.

4. Provision of habitat for commercially important fisheries:
Coastal ecosystems provide critical nursery and feeding grounds for a wide range of commercially important fisheries. Mangroves, tidal marshes, and seagrass meadows serve as breeding grounds and habitats for fish, shellfish, and other marine species. They support the reproduction and growth of these species, contributing to the sustainability of fisheries and the livelihoods of coastal communities dependent on them.

5. Food security for many coastal communities:
Coastal ecosystems are a significant source of food for many coastal communities. They provide a variety of fish, shellfish, and other marine resources that are essential for the nutrition and livelihoods of millions of people. Mangroves, tidal marshes, and seagrass meadows support local fishing and aquaculture activities, ensuring food security and economic opportunities for coastal communities.

In conclusion, the coastal ecosystems of mangroves, tidal marshes, and seagrass meadows offer a wide range of benefits and services along coasts. These include the regulation of coastal water quality, sequestration and storage of coastal blue carbon, protection from storms and sea level rise, provision of habitat for commercially important fisheries, and food security for coastal communities. The conservation and sustainable management of these ecosystems are crucial for the well-being of both human populations and the environment.
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Directions for the following 6 (six) items:Read each of the following two passages and answer the items that follow. Your answers to these items should be based on the passages only.Passage-1Ecosystems provide people with a variety of goods and services; food, clean water, clean air, flood control, soil stabilization, pollination, climate regulation, spiritual fulfilment and aesthetic enjoyment, to name just a few. Most of these benefits either are irreplaceable or the technology necessary to replace them is prohibitively expensive. For example, potable fresh water can be provided by desalinating sea-water, but only at great cost. The rapidly expanding human population has greatly modified the Earths ecosystems to meet their increased requirements of some of the goods and services, particularly food, fresh water, timber, fibre and fuel. These modifications have contributed substantially to human well being and economic development. The benefits have notbeen equally distributed. Some people have actually been harmed by these changes. Moreover, short-term increases in some ecosystem goods and services have come at the cost of the long-term degradation of others. For example, efforts to increase the production of food and fibre have decreased the ability of some ecosystems to provide clean water, regulate flooding and support biodiversity.Q. With reference to the passage, consider the following statements. Expanding humans population has an adverse effect on:1. Spiritual fulfilment 2. Aesthetic enjoyment 3. Potable fresh water 4. Production of food and fibre 5. BiodiversityWhich of the statements given above are correct ?

Ecosystems provide people with a variety of goods and services; food, clean water, clean air, flood control, soil stabilization, pollination, climate regulation, spiritual fulfilment and aesthetic enjoyment, to name just a few. Most of these benefits either are irreplaceable or the technology necessary to replace them is prohibitively expensive. For example, potable fresh water can be provided by desalinating sea-water, but only at great cost. The rapidly expanding human population has greatly modified the Earths ecosystems to meet their increased requirements of some of the goods and services, particularly food, fresh water, timber, fibre and fuel. These modifications have contributed substantially to human well being and economic development. The benefits have notbeen equally distributed. Some people have actually been harmed by these changes. Moreover, short-term increases in some ecosystem goods and services have come at the cost of the long-term degradation of others. For example, efforts to increase the production of food and fibre have decreased the ability of some ecosystems to provide clean water, regulate flooding and support biodiversity.Q. The passage mentions that some people have actually been harmed by these changes. What does it imply?1. The rapid expansion of population has adversely affected some people. 2. Sufficient efforts have not been made to increase the production of food and fibre.3. In the short term some people may be harmed, but in the long term everyone will benefit from modifications In the Earths ecosystems.Which of the statements given above is/are correct?

Ecosystems provide people with a variety of goods and services; food, clean water, clean air, flood control, soil stabilization, pollination, climate regulation, spiritual fulfilment and aesthetic enjoyment, to name just a few. Most of these benefits either are irreplaceable or the technology necessary to replace them is prohibitively expensive. For example, potable fresh water can be provided by desalinating sea-water, but only at great cost. The rapidly expanding human population has greatly modified the Earths ecosystems to meet their increased requirements of some of the goods and services, particularly food, fresh water, timber, fibre and fuel. These modifications have contributed substantially to human well being and economic development. The benefits have notbeen equally distributed. Some people have actually been harmed by these changes. Moreover, short-term increases in some ecosystem goods and services have come at the cost of the long-term degradation of others. For example, efforts to increase the production of food and fibre have decreased the ability of some ecosystems to provide clean water, regulate flooding and support biodiversity.Q. With reference to the passage, consider the following statements:1. It is imperative to modify the Earths ecosystems for the well being of mankind. 2. Technology can never replace all the goods and services provided by ecosystems. Which of the statements given above is/are correct ?

A species that exertsan influence out of proportion to its abundance in an ecosystem is called a keystone species. The keystone species may influence both the species richness of communities and the flow of energy and materials through ecosystems. The sea star Pisaster the flow of energy and materials through ecosystems. The sea star Pisaster ochraceus, which lives in rocky intertidal ecosystems on the Pacific coast of North America, is also an example of a keystone species. Its preferred prey is the mussel Mytilus californianus . In the absence of sea- stars, these mussels crowd out other competitors in a broad belt of the intertidal zone. By consuming mussels, sea star creates bare spaces that are taken over by a variety of other species. A study at the University of washington demonstrated the influence of Pisaster on species richness by removing sea stars from selected parts of the intertidal zone repeatedly over a period of five years. Two major changes occured in the areas from which sea stars were removed. First, the lower edge of the 46. mussel bed extended farther down into the intertidal zone, showing that sea stars are able to eliminate mussels completely where they are covered with water most of the time. Second, and more dramatically, 28 species of animals and algae disappeared from the sea star removal zone. Eventually only Mytilus, the dominant competitor, occupied the entire substratum. Through its effect on competitive relationships, predation by Pisaster largely determines which species live in these rocky intertidal ecosystems.Q. Consider the following assumptions:1. The food chains/food web in an ecosystem are influenced by keystone species.2. The presence of keystone species is a specific characteristic of aquatic ecosystems.3. If the keystone species is completely removed from an ecosystem, it will lead to the collapse of the ecosystem.With reference to the passage, which of the above assumptions is/are valid?

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The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services along coasts like1. Regulation of coastal water quality2. Sequester and store coastal blue carbon from the atmosphere3. Protection from storms and sea level rise4. Provision of habitat for commercially important fisheries5. Food security for many coastal communitiesSelect the correct answer code:a)1, 2, 3b)1, 3, 4, 5c)1, 2, 3, 4d)1, 2, 3, 4, 5Correct answer is option 'D'. Can you explain this answer?
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The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services along coasts like1. Regulation of coastal water quality2. Sequester and store coastal blue carbon from the atmosphere3. Protection from storms and sea level rise4. Provision of habitat for commercially important fisheries5. Food security for many coastal communitiesSelect the correct answer code:a)1, 2, 3b)1, 3, 4, 5c)1, 2, 3, 4d)1, 2, 3, 4, 5Correct answer is option 'D'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services along coasts like1. Regulation of coastal water quality2. Sequester and store coastal blue carbon from the atmosphere3. Protection from storms and sea level rise4. Provision of habitat for commercially important fisheries5. Food security for many coastal communitiesSelect the correct answer code:a)1, 2, 3b)1, 3, 4, 5c)1, 2, 3, 4d)1, 2, 3, 4, 5Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The coastal ecosystems of mangroves, tidal marshes, and seagrass meadows provide numerous benefits and services along coasts like1. Regulation of coastal water quality2. Sequester and store coastal blue carbon from the atmosphere3. Protection from storms and sea level rise4. Provision of habitat for commercially important fisheries5. Food security for many coastal communitiesSelect the correct answer code:a)1, 2, 3b)1, 3, 4, 5c)1, 2, 3, 4d)1, 2, 3, 4, 5Correct answer is option 'D'. Can you explain this answer?.
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