ANGROVE management group

TheThe ‘colour’ of remotely sensed and GIS data ‘colour’ of remotely sensed and GIS data in the sustainable management ofin the sustainable management of

tropical coastal biocomplexitytropical coastal biocomplexity

TheThe ‘colour’ of remotely sensed and GIS data ‘colour’ of remotely sensed and GIS data in the sustainable management ofin the sustainable management of

tropical coastal biocomplexitytropical coastal biocomplexity

Farid Dahdouh-Guebas & Nico KoedamFarid Dahdouh-Guebas & Nico Koedam

  Laboratory of General Botany and Nature Management,Laboratory of General Botany and Nature Management,Mangrove Management Group, Vrije Universiteit Brussel,Mangrove Management Group, Vrije Universiteit Brussel,

Pleinlaan 2, B-1050 Brussels, BelgiumPleinlaan 2, B-1050 Brussels, Belgium

ANGROVE management group

‘‘Tropical Coastal Biocomplexity’Tropical Coastal Biocomplexity’

MANGROVE FORESTS

flora fauna

man env.

biodiversity

ecosystem functioning

SEAGRASS BEDS

flora fauna

man env.

biodiversity

ecosystem functioning

CORAL REEFS

flora fauna

man env.

biodiversity

ecosystem functioning

overall relevance :biodiversity

coastal protectionwood and fishery resource

ANGROVE management group

‘‘The colour’The colour’

remote sensing as a monitoring toolfrom historic aerial photography to VHR satellite imagery

GIS as an analysis tool

ANGROVE management group

Remote sensing and GIS in theRemote sensing and GIS in thesustainable managementsustainable management

of tropical coastal ecosystemsof tropical coastal ecosystems

8 papers covering tropical coastal areas in Venezuela, Kenya, Sri Lanka and Malaysia

ANGROVE management group

Resolutions :spatial

temporalspectral

(radiometric)(taxonomic) S pat ial

Temporal

S pect ral

Identific a tionof spec ies

typ ific a tion of ec osystems and land uses / land c over

Disaster monitoring

G eomorphology

d

Popula tion dynamic s

Pollution

Vegeta tionstress

Arc haeology

Typific ation ofassemblages

tc

Identific a tionof spec ies

typ ific a tion of ec osystems and land uses / land c over

Disaster monitoring

ANGROVE management group

Identification of species/genera (LK)Identification of species/genera (LK)

Verheyden, A., F. Dahdouh-Guebas, K. Thomaes, W. De Genst, S. Hettiarachchi & N. Koedam, 2002.High resolution vegetation data for mangrove research as obtained from aerial photography.

tonalitytexture

structure

shapeshadesize

position

ANGROVE management group

Vegetation structure dynamics (LK)Vegetation structure dynamics (LK)

Dahdouh-Guebas, F., A. Verheyden, W. De Genst, S. Hettiarachchi & N. Koedam, 2000. Four decade vegetation dynamics in Sri Lankan mangroves as detected from sequential aerial photography : a case-study in

Galle. Bulletin of Marine Science 67(2): 741-759.

19561956 19741974 19941994

ANGROVE management group

Identification of species (LK-KE)Identification of species (LK-KE)IKONOS satellite imageryaerial photography

pansharpenedBGNIR

false colourcomposite

panchromatic

• new space technology (Ikonos, Quickbird) • automated identification• extra temporal window

20022002

ANGROVE management group

Calzadilla Pérez, A., M.C.J. Damen, D. Geneletti & T. Hobma, 2002. Monitoring a recent delta formation in a tropical coastal wetland using remote sensing and GIS. Case study : Guapo River Delta, Laguna de Tacarigua,

Venezuela.

Monitoring coastal Monitoring coastal changes (VE)changes (VE)

ANGROVE management group

Typification of assemblages/ Typification of assemblages/ land cover (KE)land cover (KE)

Kairo, J.G., B. Kivyatu & N. Koedam, 2002. Application of remote sensing and GIS in the management of mangrove forests within and adjacent to Kiunga Marine Protected Area, Lamu, Kenya.

ANGROVE management group

Typification of land Typification of land cover / assemblages (LK)cover / assemblages (LK)

Jayatissa, L.P., M.-C. Guéro, S. Hettiarachchi & N. Koedam, 2002. Changes in vegetation cover and socio-economic transitions in a coastal Lagoon

(Kalametiya, Sri Lanka), as observed by teledetection and ground-truthing, can be attributed to an upstream

irrigation scheme.

socio-economic survey :• use of lagoon water• fishermen demography• (shell)fish catch

ANGROVE management group

De La Ville, N., A.C. Diaz & D. Ramirez, 2002. Remote sensing and GIS technologies as tools to support sustainable management of areas devastated by landslides.

Disaster Disaster management management

(VE)(VE)

ANGROVE management group

Long-term monitoring / integration / forecastingLong-term monitoring / integration / forecasting

Dahdouh-Guebas, F., J.G.Kairo, L.P. Jayatissa, S. Cannicci & N. Koedam, 2002. An ordination study to view vegetation structure dynamics in disturbed and undisturbed mangrove forests in Kenya and Sri Lanka. Plant Ecology 161(1): 123-135.

ANGROVE management group

Research challengesResearch challenges• remote sensing and GIS innovation;

• automated integration of image attributes (texture + structure detection) : have the computer done what until now only the human eye is capable of;

• long-term monitoring (way beyond the scale of projects with a short duration of 4-5 yrs);

• parallel complementary research from many disciplines;

• integration of inter-disciplinary data.