Climate change is a change in the statistical distribution of weather over periods of time that range from decades to millions of years. It can be a change in the average weather or a change in the distribution of weather events around an average. Climate change may be limited to a specific region, or may occur across the whole Earth. Climate change may be qualified as anthropogenic climate change, more generally known as "global warming" or "anthropogenic global warming”. Climate change has both direct and indirect impacts on fish stocks which are exploited commercially. Direct effects act on physiology and behavior and alter growth, reproductive capacity, mortality and distribution. Indirect effects alter the productivity, structure and composition of the marine ecosystems on which fish depend for food. However, even though the year-on-year rate of anthropogenic climate change may seem slow, this is very rapid compared with previous natural change and the accumulative value produces a significant difference from the "natural" state quite quickly. Climate change impacts such as more frequent and severe floods and droughts will affect the food and water security of many people. Bangladesh is thought to be one of the most vulnerable countries of the world to climate change and sea level rise (CCSLR). IPCC estimates predict that due to the impact of climate change, sea level in Bangladesh may rise by 14 cm by 2025, 32cm by 2050 and 88 cm by 2100. There are a number of environmental issues and problems that are hindering development of Bangladesh. Salinity is a current problem, which is expected to exacerbate by climate change and sea level rise. Salinity intrusion due to reduction of freshwater flow from upstream, salinization of groundwater and fluctuation of soil salinity are major concern of Bangladesh. Cyclones and tidal surge is adding to the problem. Tidal surge brings in saline water inside the polders in the coastal area. Due to drainage congestion, the area remains waterlogged, increasing the salinity (Abedin, 2010). Bangladesh in general is highly vulnerable to predicted climate changes that are already occurring and are expected to continue over the next century. Bangladesh is recognized worldwide as one of the most vulnerable to the impact of global warming and climate change.

1. WELCOME TO
SEMINAR PAPER PRESENTATION
Title of the Seminar Paper
Impacts of Climate Change on Coastal
Aquaculture in Bangladesh
Presented By
Imran Hossain
MS Student, Department of Aquaculture
BSMRAU
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2. Contents
Introduction
Objectives
Materials and Methods
Review and Discussion
Conclusion
2

3. Introduction
 Climate
 Climate change in coastal area
1. Sea level rise
2. Salinity intrusion
 Effect of climate change in aquaculture
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4. Objectives
• To know the main effect of climate change on
coastal region in Bangladesh,
• To know the impact of Climate related change on
aquaculture in the context of Bangladesh,
• To know the mitigation and adaptive measure
against climate change impact for the fisheries
sector.
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5. Materials and Methods
A Review Paper
Information were collected from
Various Books, Journals
Proceedings, Articles, Reports
Internet Browsing
Suggestions and valuable information
Compiled and arranged chronologically
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6. Review and Discussion
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7. Figure 1. The coastal zone of Bangladesh
Source: Islam et al., 20127

8. Fisheries resources in Bangladesh
3rd largest aquatic biodiversity
about 800 species
largest flooded wetland
Inland aquaculture production position is 4th
710 km long coastal belt
Continental shelf is about 37,000 Sq. Km.
Source: FAO, 2012, 20168

9. Fisheries resources in Bangladesh
EEZ is about 1,64,000 Sq. Km.
contributes 2.73 % of total export earnings and
4.39% to the GDP
22.76% of the total agricultural production & 60%
of the total animal protein intake
Source: FAO, 2012, 2016
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10. Indicators of climate change
Figure 2. Ten indicators for a warming world, Past Decade Warmest
on Record
Source: NOAA, July 28, 201010

11. Table 1: Climate change scenarios for Bangladesh
Year Temperature Change
(oC) Mean
Precipitation Change (%)
Mean
Sea Level
Rise (cm)
Annual Dec-
Feb.
June-
Aug.
Annual Dec-
Feb.
June-Aug. Prediction
2030 1.0 1.1 0.8 5 -2 6 14
2050 1.4 1.6 1.1 6 -5 8 32
2100 2.4 2.7 1.9 10 -10 12 88
Source: Bernstein et al., 200711

12. Figure 3. Shows Increase Carbon Dioxide (CO2) level (1960-2007)
Source: NOAA, 200712

13. Figure 4. Sea level changes during 1970 to 2007
Source: Allison et al., 200913

14. Table 2. The area of the coastal area which supposed to
inundate due to one (1) meter sea level rise
Region Area (%)
Khulna 65
Barisal 99
Patuakhali 100
Noakhali 44
Foridpur 12
Source: Bernstein et al., 200814

15. Table 3. Predicted changes in temperature and precipitation
Year Sea Level Rise
(cm.)
Temperature Rise (0C) Percentage of Changes in
Precipitation
2030 30 0.7 and 1.3 rises
respectively in monsoon
and winter
3% less in winter and 11
percent more in monsoon
2050 50 1.1 and 1.3 rises
respectively in monsoon
and winter
37% less in winter and 28
percent more in monsoon
Source: Mahmood et al., 199815

16. Figure 5. Number of cyclones making landfall on the coasts of
Bangladesh each year from 1901 to 2009
Source: Murty et al., 201016

17. Figure 6. Salt water intrusion in coastal area
Source: Alam et al., 1999
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18. Figure 7. Salinity zone area in Bangladesh
Source: Bernstein et al., 200718

19. Figure 8. Bleached brain coral
Source: NOAA19

20. Figure 9. Coastal Impacts of Climate Change
Source: Bernstein et al., 200720

21. Figure 10. Migration of fish
Source: Bernstein et al., 200721

22. Figure 12. Climate change on fisheries
Source: Edward Allison et al., 200922

23. Future climate change strategy and action
plan
• Bangladesh government is committed to strengthen the
country’s resilience to climate change, reduce risks posed
to national development; and development of the country
along a low-carbon growth path.
• The Bangladesh Climate Change Strategy and Action
Plan (BCCSAP) is a 10-year program (2009-2018).
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24. Conclusion
• Biodiversity of the coastal region is lost, shortage of fresh
water, alteration of fish physiology , growth and behavior.
• Climate change has both positive and negative impacts on
coastal aquaculture in Bangladesh, salinity intrusion into
freshwater destroy the native species where as it also
facilitates the shrimp farming.
• Different policies regarding environmental issues is
essential in the coastal regions and awareness creating
program should be conducted to overcome the adverse
climatic situation
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25. Thank You All
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