GES1021-Lecture 2-intertidal-21August2018s.pdf

Such species are described as playing a criacal role

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Such species are described as playing a criAcal role in maintaining the structure of an ecological community, affecAng many other organisms in an ecosystem and helping to determine the types and numbers of various other species in the community. Paine, R.T. (1995). "A ConversaAon on Refining the Concept of Keystone Species". Conserva/on Biology . 9 (4): 962–964. E.g. Mud lobster in Singapore’s mangrove
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Moon crabs Ashtoret lunaris Matuta planipes
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Mudskippers The mudskipper is a semi-terrestrial fish that can live above water for extended periods of time provided they are kept moist. Their modified pectoral fins are effective for slithering quickly over the ground. Very common in mangroves and mudflats.
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Giant mudskipper ( Periophthalmodon schlosseri) Dusky-gilled mudskipper ( Periophthalmus novemradiatus)
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Corals especially those in the intertidal zone contain UV protectants.
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Sand crab, Scopimera spp. has membrane on each leg for exchange of air. Building a shelter: 1. Makes shallow pit in sand. 2. Runs around pit, pushing sand pellets up to form curved wall. 3. Makes a complete canopy of sand. 4. Burrows deeper beneath thick dome.
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Sand tubeworm Exposed part of tube is made by incorporaAng small pebbles, all stuck on by mucus secreted by the worm. Provides strength to the exposed tube.
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Ligia spp. (sea cockroach) Hermit crabs
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Marine snails Secretes protective calcium carbonate shell throughout life. Protective reflex is to withdraw entire body completely into shell; opening is sealed with a protective plate carried on foot of animal. Forms an effective seal. cat’s eye operculum of turban shell, Turbo bruneus. cat’s eye operculum of turban shell, Turbo bruneus
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Trochus spp. (Top shells)
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Strombus urceus ( Black-lipped conch) Gong Gong
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cowries
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Lambis lambis (Spider conch) Shell spines are primarily for maintaining stability.
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Xanthid crabs
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Pilumnid crab Leelumnus radium Mendoza & Ng, 2011 Found in the encrusting communities in Singapore
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Leucosid crabs
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Red egg crab, Atergatis integerrimus
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  • Fall '16
  • Tide, Green turtle, Intertidal ecology, Chek Jawa

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