Symbiosis and Competitive Interactions

11/25/01

Click here to start

Table of Contents

Symbiotic Relationships in Coral Reefs

Symbiosis

Types of Symbiosis

Obligate Versus Facultative Relationships

Symbioses Involving Corals

Mutualism

zooxanthellae and corals

coral guard crabs and pocilloporid corals

Christmas tree worms and Porites corals

Commensalism

coral shrimps and corals

gall crabs and pocilloporid corals

petroglyph shrimp and Porites lobata

Parasitism

Epitomium snails and mushroom corals

parasitic flatworms and rice coral

parasitic nudibranchs

coral “zits” on Porites compressa

bacterial diseases on corals

Symbioses Involving Other Reef Organisms

Mutualism

anemonefish and sea anemones

goby shrimp and the Hawaiian shrimp goby

cleaner wrasse cleaning stations

banded coral shrimp

scarlet cleaner shrimp

sea cucumber crab and sea cucumbers

pompom crabs and sea anemones

anemone hermit crab and sea anemones

Commensalism

squat anemone shrimp and sea anemones

crabs and sea anemones

sea star shrimp and sea stars

urchin shrimp and sea urchins

shrimpfish & sea urchins

Coral Wars

Competing Corals

Mechanisms of Competitive Interactions

direct tentacular killing

direct tentacular killing

nematocyst

mesenterial filament extrusion

mesenterial filament from Fungia scutaria

noxious mucus secretions

overgrowth (“bulldozing”)

overshading

overshading

Author: David A. Krupp

Email: krupp@hawaii.edu

Home Page: krupp.wcc.hawaii.edu