OBJECTIVES

 
OBJECTIVES
 

CHALLENGES

PROPOSALS
     
   
 
 
 
 
 
 
 

 


Welcome to Panglao Marine Biodiversity Project 2004 Website!

OUTPUTS
MANNER DATA
MOLLUSC FAUNA
CRUSTACEAN FAUNA
AA


MANNER OF DATA TO BE PROCESSED

Once the Philippines site has been investigated, there will be results of comparable nature, obtained by the same research team using the same techniques, for 5 site: Koumac (west coast of New Caledonia), Touho (east coast of New Caledonia), Lifou (Loyalty Islands), Rapa (Australes archipelago), and Panglao. There will be within site and between sites results, which all together come under (3) three words:

  • Richness, earlier similar intensive studies in the coral reef lagoon of New Caledonia have revealed 2,500-3,000 mollusc species per site, (this is more species than in the whole Mediterranean or the whole of New Zealand) and only 550 species on the island of Rapa in southernmost French Polynesia. If the gradients observed for corals are extrapolated to molluscs, we should expect numbers of molluscs species in the order of 5-10,000 in a Philippine site. We will also compare the results of this labour-intensive approach to the results of a Rapid Assessment Survey (RAS) approach, as conducted by Conservation International (CI), and to a quantitative sampling of soft bottoms, using grabs and biodiversity estimators.

TROPICAL INDO-PACIFIC
LOCATION
DEPTH RANGE
NO. OF SPECIES
Koumac, New Caledonia
Littoral/Sublittoral
2738
Touho, New Caledonia
Littoral/Sublittoral
3001
Lifou, Loyalty Island
Littoral/Sublittoral
2536-2847
Kwajalein
Littoral/Sublittoral
1279
Enewetak, Marshall Is.
Littoral/Sublittoral
1021
Cocos-Keeling, Indian Ocean
Littoral
504
Easter Island
Littoral
121
TROPICAL AND NON-TROPICAL ATLANTIC
(Local and Regional)
LOCATION
DEPTH RANGE
NO. OF SPECIES
Florida Keys
Littoral/Sublittoral
1400
Garraf, NW Mediterranean
Littoral/Sublittoral
622
Indian River, Florida
Littoral/Sublittoral
428
Plymouth, UK
Littoral/Sublittoral
375
White Sea
Littoral/Sublittoral
162
GLOBAL PROVINCES
(Non-Tropical)
LOCATION
DEPTH RANGE
NO. OF SPECIES
South Africa
Littoral to offshore
2788
Mediterranean
Littoral to offshore
2024
New Zealand
Littoral to offshore
2091
 
  • Rarity, a characteristic shared by complex tropical ecosystems (forest, reefs) is that most of their species are small and rare. At the Koumac site in New Caledonia, as many as 20% of the species are represented by single specimens, despite a sampling effort resulting in a total of 127,000 specimens. With semi-quantitative results obtained at 5 sites, it will be possible to evaluate the extent of different forms of rarity: species represented by low number of specimens, but with extensive ecological and geographical distributions (rarity s.s.); species locally abundant but with restricted geographical ranges (endemics); species with narrow ecological niche, vast geographical distribution, and indifferent number of specimens (stenoecious species).
  •  Singularity, the issue of representativity is central to strategic planning for management of conservation areas. In New Caledonia, two sites only 200km apart have 40% or less of their biodiversity in common (i.e. 60% of the species are present on a single site). When the three sites are compared together, we found that they share only 22% of the total species and 50% of the species are found at one site only. In view of the expected magnitude of species richness (cf. 1 above), on the bottom until they are colonized by the fauna. These are techniques traditionally operated by local fisherman to collect seashells from deeper water (50-250 meter), and Balicasag is world famous for it's fisheries of deep-water seashells. Our research group does not have first hand experience of these nets, and though Mr. Quirino Hora, we are relying on the local know-how.