GS Paper I Mains - 2019- Question Analysis

  • Assess the impact of global warming on the coral life system with examples.

Mains Assignment Question

Assess the impact of global warming on the coral life system with examples. (150 Words) 

Subjects : Environment, Biodiversity & Climate Change

Answer Approach :
  • Introduction: Relation between Global warming and health of coral reef
  • Body: List down the impacts of global warming
  • Conclusion: Conclude with Paris Agreement goals as a way forward. 

Divya .

Global warming is the rise of average temperature of earth.It is the main cause of climate change which has impacted all spheres of earth. Corals that sustain maximum biodiversity of species face major threats because of global warming.

Impact of global warming on corals:-

1. Increase in temperature- the temperature of oceans is rising and is impacting the zooxanthalle algae which in turn causes coral bleaching.According to ‘under water earth report’, 90% of reefs have been impacted by bleaching. 50% of Great Barrier Reef has been killed because of coral bleaching.

2. Mineral loss- loss of minerals from corals is attributed to rise in temperature.

3. Decrease in pH- because of rise in carbor dioxide the pH of water is decreasing. This is in turn impacting the phytoplankton which inturn the creation of calcareous skeletons. The IUCN reported that 33% of reef building corals are threatened.

Corals though rom only 0.1% of area of ocean floor but sustain around two third of aquatic biodiversity . So the need of hour is to take effective steps to ensure the protection of these systems:-

1.limiting global warming to well below 2 degree Celsius above pre industrial levels as per paris climate deal

2. Limiting the use of fossil fuels to combat green house gases.

Global warming is direly impacting the coral reefs. Steps must be taken to not only sustain these systems but also fulfill the SDG -8 (combating climate change). Ecological turmoil surrounding the land and water has to be fought effectively, efficiently and sustainably. 

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Global warming is the rise of average temperature of earth.It is the main cause of climate change which has impacted all spheres of earth. Corals that sustain maximum biodiversity of species face major threats because of global warming. (Your intro is good but lengthy according to the words limit. Either omitt 2nd line or merge it with 1st line using fewer words, thereafter remove last 4 words of intro.)

Impact of global warming on corals:-

1. Increase in temperature-(Point is good and placed approprately but this Heading suggests a Cause and NOT an Impact. You can write here- Coral Bleaching) the temperature of oceans is rising and is impacting the zooxanthalle algae which in turn causes coral bleaching.According to ‘under water earth report’, 90% of reefs have been impacted by bleaching. 50% of Great Barrier Reef has been killed because of coral bleaching. (content is good but orientation of whole paragraph should be reversed from Cause-Impact to Impact-Cause as per the demand of the question.)

2. Mineral loss- (Point is good) loss of minerals from corals is attributed to rise in temperature. (Any data/ example as question is specifically asking to expalin with examples.)

3. Decrease in pH- (Here you can write Decrease in creation of calcereous skeletons as decrease in pH is a cause and not an impact.) because of rise in carbor dioxide the pH of water is decreasing. This is in turn impacting the phytoplankton which inturn the creation of calcareous skeletons. The IUCN reported that 33% of reef building corals are threatened.(Any Example? like Great Barrier Reef etc.)

Corals though rom only 0.1% of area of ocean floor but sustain around two third of aquatic biodiversity . So the need of hour is to take effective steps to ensure the protection of these systems:-(Last line can be made shorter in order to reduce words )

1.limiting global warming to well below 2 degree Celsius above pre industrial levels as per paris climate deal

2. Limiting the use of fossil fuels to combat green house gases. (These two points are important but should be clubbed and written in conclusion. )

Global warming is direly impacting the coral reefs.(This line is Repetitive and is not exactly required hence can be ommited.) Steps must be taken to not only sustain these systems but also fulfill the SDG -8 (combating climate change). Ecological turmoil surrounding the land and water has to be fought effectively, efficiently and sustainably. 

1) Overall presentaion, content and structure of answer is good.

2) Language is simple(which is required also).

3) Addition of few more points in content part is required. You can add disease, lack of food etc.

4) You have crossed the words limit (Total 254) and to shorten the answer, you should-

a) reduce the length of Intro. 

b) Club the points as suggested. 

c) Omitt important but not directly required parts of the answer such as - Global warming is direcly impacting the coral reefs.

WELL DONE!

You can visit following link to add more points.

https://oceanservice.noaa.gov/facts/coralreef-climate.html

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Description

Global Warming is the greatest global threat to coral reef ecosystems. Scientific evidence indicates that the Earth's atmosphere and ocean are warming, and these changes are primarily due to greenhouse gases derived from human activities.
Impact of Global Warming
Warming ocean: It causes thermal stress which hampers the growth of polyps.

  • Sea level rise: it may lead to increases in sedimentation for reefs located near land-based sources of sediment. Sedimentation runoff can lead to the smothering of coral.
  • Changes in storm patterns: stronger and more frequent storms can destruct the structure of reefs.
  • Changes in precipitation: increased runoff of freshwater, sediment, and land-based pollutants contribute to algal blooms and cause murky water conditions that reduce light.
  • Altered ocean currents: changes in connectivity and temperature regimes contribute to lack of food for corals and hampers dispersal of coral larvae.
  • Ocean acidification (a result of increased CO2): reduction in pH levels decreases coral growth and structural integrity.
    Examples
  • Great Barrier Reef in Australia (Bleaching in 2016 and 2017 killed 50% of its coral)
  • Northwestern Hawaiian Islands in the United States

    Limiting global average temperature to well below 2°C above pre-industrial levels in line with the Paris Agreement provides the only chance for the survival of coral reefs globally.

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