slr - mangrove ppt

MONITORING OF SOIL SURFACE ELEVATION

DYNAMICSIN MANGROVE WETLANDS

IN RESPONSE TO SEA LEVEL RISE IN INDONESIA

Frida SidikHanggar PrasetioNuryani WidagtiCatherine Lovelock

Regional Conferences“Increasing the Resilience of Mangrove - Aquaculture Socio-Ecological Systems in Southeast 17 – 20 February 2014 BOGOR

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OUTLINE:

Balai Penelitian & Observasi LautKementerian Kelautan & perikanan

INTRODUCTION OBJECTIVES LOCATION METHOD CONCLUSION FUTURE WORKS

INTODUCTION• Indonesia coastline : 95.181

km, • highest rank of world's

mangrove rich countries, covering 22.6% of global total mangroves (Giri et al., 2010)

• 3.7 million ha of mangrove forests and 5.5 million ha mangrove plantation areas, with 35 mangrove species (MMAF, 2004).

• As coastal wetlands, mangroves are threatened by SLR (Mcleod et al., 2010)

• Mangrove can adapt concerning SLR if elevation change rate > SLR rate

Mangrove Forest

To understand mangrove ecosystem

adaptation to projected SLR

Monitoring 02


Sea level rise vulnerability

Source: Mcleod et al., 2010 03


(Source: Lovelock and Ellison, 2007)

Mangroves have to maintain positive surface elevation change equivalent to or exceeding the rates of SLR.The factors influencing soil elevation : auto compaction, decomposition of organic matter, root growth, water storage in sediments (shrink-swell) and tidal flooding

How mangroves can adapt ?

(Source: Cahoon et al., 2006) 04


OBJECTIVES

1. To investigate the capacity of mangrove wetlands to keep pace with projected sea level rise

2. To determine the factors controlling the processes


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MANGROVE FOREST – Perancak around IMRO building, Budeng, Jembrana, Bali

LOCATION

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MANGROVE

SEA LEVELRISE

VerticalAccretion

ElevationChange

Treegrowth

RSET-MH, root bags,Dendrometer bands

MANGROVE WETLAND ADAPTATIONIN RESPONSE TO SEA LEVEL RISE

METHOD

Rootgrowth

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DATAData needed Sampling

MethodInformation

Insitu data:

Geomorphology (elevasion, vertical accretion)

RSET – MH, every 2 month in 2 years

Elevation and vertical accretion dynamics

Tree diameter increment

Dendrometer band, every 2 month

Tree growth

Root biomass growth

in-growth root bags Root production

Measurement is designed as we are focusing on the importance of sedimentation and root growth


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SAMPLING SITE

6 RSET stations (18 RSETs in total):

• 3 RSETs in 3 stations in natural mangrove forests

• 3 RSETs in 3 stations in abandoned shrimp ponds restored mangroves

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MEASUREMENT (ELEVATION CHANGE)

The surface elevation change is a change in elevation relative to a subsurface datum (in this study 4-10m deep)


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MEASUREMENT (VERTICAL ACREATION)

?cm

Vertical accretion is dimension of soil development determined from a marker horizon(sediment supply & biological matter)


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MEASUREMENT (DENDROMETER BAND)

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MEASUREMENT (ROOT GROWTH)

The contribution of biotic processes to elevation change or vertical accretion through root production.


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CONCLUSION Over two years of observation, rate of surface elevation change (0.7

cm/year) exceeded the current SLR rate (0.3 cm/year) mangroves can keep pace with SLR

Soil surface elevation in restored mangroves increased over time at a comparable rate as in natural forests. This finding shows the recovery of restored mangrove ecosystems in response to accelerating sea level rise through maintenance of soil surface elevation.

Hydrological (seasonal pattern) and biological processes (root production) are important factors controlling elevation.


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FUTURE WORKS Digital elevation mapping using remote sensing Measurement of Relative Positioning control points Modeling the impact of projected SLR in the wetland using SLAMM (Sea

Level Affecting Marshes Model)


15Sources:Clough & Larson, 2010; CGIAR, 2010

THANK YOUMATUR SUKSEMAMore information bpol.litbang.kkp.go.id

slr - mangrove ppt

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