Invertebrate invertebrates, chemical ecology

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Chemical Ecology of Mobile Benthic Invertebrates Predators and Prey,... 

Several excellent reviews currently exist on particular aspects of marine chemical ecology,1-6 so this chapter does not attempt to provide a comprehensive or historic overview, but rather tries to provide a sound conceptual discussion of the diversity and importance of chemically mediated interactions involving mobile invertebrates. Due to space constraints, not all relevant studies can be included, and recent studies are sometimes cited in favor of more classical work, as these provide similar conceptual information but often use more advanced methodologies and provide greater access to other literature on the topic. Where possible, this chapter highlights studies that assess the importance of chemically mediated interactions within the broader context of ecology and evolutionary biology. 

An increasing number of specialized interactions between small mobile invertebrates and chemically defended algae or sessile invertebrates have been reported in the marine environment,6167183 and such interactions are also well known between terrestrial plants and insects.200 However, there is some debate as to the ultimate factors driving this ecological specialization. Several authors have suggested that a plant s value as a refuge from predators (i.e., enemy-free space 84201) may be more important than the value of the plant as a food resource,202 but this... 

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