'Corals' diaporamas de présentation

Chapter 14

Chapter 14. Coral Reefs. Coral reefs rival that other great tropical community, the rainforest in their beauty, richness and complexity Basic physical structure of both communities is produced by organisms. Three-dimensional framework that is home to an incredible assortment of organisms.

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Anthozoa - Corals and Anemones

Anthozoa - Corals and Anemones. Anemones. Corals. Corals. Anthozoa. Sea anemones and most corals Polyp is dominant and only life form NO MEDUSA Presents evolutionary question:

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PHYLUM CNIDARIAN

PHYLUM CNIDARIAN. Outline. Classification Characteristics Reproduction Description of the 4 classes Current experimentation Distribution Fossil records. Classification. Cnidarian - (Gr. Knide , nettle, + L. aria [pl. suffix] like or connected with).

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Coral/algal Reefs III

Coral/algal Reefs III. The future?. Utilitarian justification for reef conservation. Therapeutic compounds from marine species Anti- virals from sponges, seagrass Anti-tumor compounds from tunicate, dogfish, bryozoan , sea hares, cyanobacteria , sponge

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Coral Reefs Components & Dynamics Corals important components of reefs

Coral Reefs Components & Dynamics Corals important components of reefs Other organisms also contribute Coralline red algae cement debris together More important in Pacific than Atlantic Part of bioerosion process. Fig. 15-8. Coral Reefs Structure. Fig. 15-12.

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Coral Reefs

Coral Reefs. Corals are Colonial Organisms. Almost all corals are colonial organisms. This means that they are composed of hundreds to hundreds of thousands of individual animals, called polyps. Corals belong to the phylum, Cnidaria. Each polyp has a stomach that opens at only one end.

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Coral Reefs Drew Harvell Ecology and Evol. Biology

Coral Reefs Drew Harvell Ecology and Evol. Biology. Tropical Community Structure: Bottom Up vs Top Down?. Over view of Reef Community Population Biology Corals Hughes model Predation Acanthaster Cyphoma Competition and Sweeper Tentacles Bottom Up Nutrients Larval recruitment

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CNIDARIA

CNIDARIA. Phylum: Cnidaria: (formerly called Coelenterata) Class: Anthozoa: (corals) Hydrozoa: (hydroids) Scyphozoa: (jellyfish) Sub-Classes: Zoantharia: Rugosa (extinct) Tabulata (extinct) Scleractina (reef building, still exist part of the Zoantharia). CLASS : ANTHOZOA (CORALS).

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Last Call for Corals

Last Call for Corals. Images ? Mar. 8, 2011. A Sand County Almanac. Aldo Leopold. Florida Keys NMS. Florida Keys. Florida Keys aerial views. Looe Key Reef aerial view. Looe Key Reef aerial views. Looe Key NMS. Looe Key geology. Looe Key features. Elkhorn coral.

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Phylum Cnidaria (formerly Coelenterata)

Phylum Cnidaria (formerly Coelenterata). G: stinging thread bearing. The Hydra. Powers of regeneration stem from omnipotent cells. Evolutionary Relationships. Phylum Cnidaria. All have nematocysts (cnidae) Have radial symmetry 2 layers (epidermis and gastrodermis)

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Marine Biology MAR111

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Interesting Cnidarians

Interesting Cnidarians. Hydras- a Hydrozoan. Freshwater hydrozoan Spend most of life as polyp Can move with a somersaulting movement. Portuguese Man-Of-War. A type of hydrozoan that grows in a colony One of the polyps ( pneumatophore) becomes a float to keep the colony on the surface

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What about Symmetry? Radial or Radially Symmetric

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Cnidaria & Ctenophora

Cnidaria & Ctenophora. Cnidaria. Radially symmetrical Tentacles contain nematocysts (stinging cells). Cnidaria. Medusa : free-swimming Polyp : sessile. Class Anthozoa. 6000 species, including sea anemones, corals and sea fans. May be solitary or colonial

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Phylum Cnidaria

Phylum Cnidaria. Cnidarians Include Hydras, jellyfish, sea anemones & corals Radially symmetrical Acoelomate Two basic forms: Polyp : Cylindrical form which attach bases to substratum Medusa : Flattened, mouth down version of the polyp. Moves freely. Forms of Cnidarians. Body Plan.

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Disturbance on coral reefs from the Mexican Pacific

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Marin Life

Marin Life. Corals. Some corals live on their own

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