maltese cave ecosystems - imbebiodivmex.imbe.fr/img/pdf/wg3_cave_final_light_web-2.pdf · rachel...
TRANSCRIPT
![Page 1: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/1.jpg)
Maltese Cave Ecosystems
Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto Ruiz.
Supervised by: Thierry Pérez, Pierre Chevaldonne
Christophe Lejeusne
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Objectives
• Present status of the Maltese marine cave ecosystems
• Ecological conditions in the caves
• Species & communities characterization
• Improve our knowledge of underwater cave ecosystems and cave research techniques
• Compile a scientific report and provide baseline for Maltese marine cave ecosystems
![Page 3: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/3.jpg)
![Page 4: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/4.jpg)
• SCUBA Diving techniques
• Estimation of geomorphological features
• Species richness 25 x 25 cm photo quadrats
• Community structure: – Index (species form)
– Relative abundance
• Sample collection
Materials & Methods
![Page 5: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/5.jpg)
Billingshurst Cave
![Page 6: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/6.jpg)
A
D C
B B
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Entrance Semi-dark
Bryozoa Sponges Algae Coral
Dark
Taxonomic Assemblages
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A
D C
B A B
C D
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Billingshurst Cave cumulative diversity
0
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0 1 2 3 4 5 6 7 8 9 10
Cu
mu
lati
ve n
um
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r o
f sp
eci
es
Quadrat I.D. in BILLINGSHURST CAVE
Entrance
Semi-dark
Dark
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Coral Cave
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A B
C D
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A B
C D
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Alex’s Cave
![Page 14: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/14.jpg)
Alex’s Cave
![Page 15: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/15.jpg)
A B
C D
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Taxonomic Assemblages Entrance Dark
Bryozoa Sponges Algae Bivalvia Ascidiacea Coral
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Taxonomic Assemblages
![Page 18: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/18.jpg)
A B
C D
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Conclusions
• Community structure is largely influenced by: – Geomorphological features – Light penetration – Hydrodynamics
• Marine caves in Malta are highly variable
• Species diversity and richness change along the cave
gradient
• Sponges are one of the prominent taxonomic group in Maltese marine caves
![Page 20: Maltese Cave Ecosystems - IMBEbiodivmex.imbe.fr/IMG/pdf/WG3_CAVE_final_light_web-2.pdf · Rachel Kelly, Alberto Martinez, Raouia Ghanem, Erica Scerri, Niv David and César Augusto](https://reader034.vdocument.in/reader034/viewer/2022050205/5f58a677eb26896ad7422ac8/html5/thumbnails/20.jpg)
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Thank You!
The amazing people of BioDivMex: Malta 2014
Thierrry, Pierre, Christophe & Julian
Maia Fourt & Arnaud Lalo
Joseph A. Borg & Patrick A. Schembri
Rachel Watts & Paradise Bay Diving Center