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The Value of Posidonia
oceanica in Turkey’s Aegean
Esra Başak, Camille Bann, Güner Ergün, Harun Güçlüsoy

İstanbul Ünivers...
Content



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Background information
Range of Ecosystem Services provided by
Posidonia oceanica
Valuation Methodology
...
Türkiye’nin Deniz ve Kıyı Koruma Alanları
Sisteminin Güçlendirilmesi Projesi





Part of a larger
valuation study on
si...
Mediterranean Seagrass (Posidonia
oceanica)
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A flowering plant that grows in marine,
fully saline environment...
Mediterranean seagrass meadows
“Lungs of the sea” (+/- 14 lt O2/m²/day )
 Support high biomass  Fish nursery and fishing...
Posidonias’ metabolism
Healthy seagrass environment
Source: Laegdsgaard 2001
Soil-Carbon Stocks
(source: Nicholas Institute for Environmental Policy Solutions, Duke University)

tCO2e per Hectare, Gl...
Methodology for Valuation



Literature review on Posidonia’s C flows (sequestration)
& C sink capacity (tCO2 eq/ha/yr)

...
Seagrass Distribution in Gökova SEPA

Total surface =
13 km2
Seagrass Distribution in Foça SEPA

Total Surface = 6,7 km2
Avoided Carbon Emissions
Value (US$11.2 / tCO2eq)
Posidoni
a
surf
ace
(ha)

Site

Gökova

C seq †
(tCO2
eq/h
a/yr)

Soil C...
Conclusions
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Embedded natural capital
Main threats facing Posidonia
Unmanifested/unperceived values
Research & m...
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The Value of Posidonia oceanica in Turkey’s Aegean

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The Value of Posidonia oceanica in Turkey’s Aegean
Esra Başak, Camille Bann, Güner Ergün, Harun Güçlüsoy
İstanbul Üniversitesi
Forestry Faculty
29 June 2011
Strengthening the system of Marine and Coastal Protected Areas of Turkey Project

Published in: News & Politics, Technology
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The Value of Posidonia oceanica in Turkey’s Aegean

  1. 1. The Value of Posidonia oceanica in Turkey’s Aegean Esra Başak, Camille Bann, Güner Ergün, Harun Güçlüsoy İstanbul Üniversitesi Forestry Faculty 29 June 2011 Türkiye’nin Deniz ve Kıyı Koruma Alanları Sisteminin Güçlendirilmesi Projesi
  2. 2. Content     Background information Range of Ecosystem Services provided by Posidonia oceanica Valuation Methodology Results & Discussions
  3. 3. Türkiye’nin Deniz ve Kıyı Koruma Alanları Sisteminin Güçlendirilmesi Projesi   Part of a larger valuation study on six MCPAs in Turkey Motivation behind the valuation of seagrasses Study Sites: Gökova SEPA Foça SEPA Background – E.S. Provision – Valuation – Results & Discussions
  4. 4. Mediterranean Seagrass (Posidonia oceanica)      A flowering plant that grows in marine, fully saline environments Among the 60 seagrass species that exist globally Seagrasses occur in all shallow coastal areas of the world (except Antarctica) Endemic to the Mediterranean Form meadows and grow in sandy or rocky sediments along the coasts
  5. 5. Mediterranean seagrass meadows “Lungs of the sea” (+/- 14 lt O2/m²/day )  Support high biomass  Fish nursery and fishing grounds  Enable protection against coastal erosion  Cycle nutrients  Reduce silt accumulation  Contribute to the production of organic carbon via the process of photosynthesis  C sequestration  Provide social and cultural values.  Background – E.S. Provision – Valuation– Results & Discussions
  6. 6. Posidonias’ metabolism
  7. 7. Healthy seagrass environment Source: Laegdsgaard 2001
  8. 8. Soil-Carbon Stocks (source: Nicholas Institute for Environmental Policy Solutions, Duke University) tCO2e per Hectare, Global Averages For Comparison: 8
  9. 9. Methodology for Valuation  Literature review on Posidonia’s C flows (sequestration) & C sink capacity (tCO2 eq/ha/yr)  Avoided Cost Method GIS Assessment of Posidonia distribution and surface occupied at study sites Application of Carbon Market Prices Lowerbound $11.2/tCO2 eq (based on Voluntarily traded av. prices for Turkey in 2010) Upperbound $20/tCO2 eq (based on EU ETS)   - - Background – E.S. Provision – Valuation – Results & Discussions
  10. 10. Seagrass Distribution in Gökova SEPA Total surface = 13 km2
  11. 11. Seagrass Distribution in Foça SEPA Total Surface = 6,7 km2
  12. 12. Avoided Carbon Emissions Value (US$11.2 / tCO2eq) Posidoni a surf ace (ha) Site Gökova C seq † (tCO2 eq/h a/yr) Soil C rele ased †** (tC O2e q/h a/yr ) 1 300 670 Total 1 970 50 † ** 5 658 954 408 218 2 916 541 1 200 282 8 575 495 609 36 448 54,4 Value US$ /yr PV (10 yrs, 10% ) US$ 792 064 Value US$ /ha /yr 70 720 4,4 Foça Total C loss per site (tC O2e q /yr) 107 168 609 Value (US$20 / tCO2eq) Value U S$ /h a/ yr Annual Value / US$ PV (10 year s, 10% ), US$ 1 414 400 10 105 276 728 960 5 208 104 2 143 360 15 313 380 1 088 1 088 Based on Duarte et al 2010 & Nicholas Institute for Environmental Policy Solutions 2010 Assuming a 10 year release period of soil carbon after habitat destruction Background – E.S. Provision – Valuation – Results & Discussions
  13. 13. Conclusions      Embedded natural capital Main threats facing Posidonia Unmanifested/unperceived values Research & monitoring needs Conservation & financing opportunities

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