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Chapter 8 - Species Interactions and Regime Shifts in Intertidal and Subtidal Rocky Reefs of the Mediterranean Sea

Published online by Cambridge University Press:  07 September 2019

By
Lisandro Benedetti-Cecchi ,
Laura Airoldi ,
Fabio Bulleri ,
Simonetta Fraschetti  and
Antonio Terlizzi
Edited by
Stephen J. Hawkins ,
Katrin Bohn ,
Louise B. Firth  and
Gray A. Williams
Stephen J. Hawkins
Affiliation:
Marine Biological Association of the United Kingdom, Plymouth
Katrin Bohn
Affiliation:
Natural England
Louise B. Firth
Affiliation:
University of Plymouth
Gray A. Williams
Affiliation:
The University of Hong Kong
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Summary

The Mediterranean Sea is a hotspot of biodiversity, originating as the result of various geological, climatic and hydrological transformations, including alternating glacial and interglacial periods during the Quaternary. There is a long tradition of descriptive studies in the Mediterranean Sea, whereas manipulative experiments have been introduced in the 1990s with an initial focus on biological interactions. Experiments are now increasingly used to examining species interactions in relation to regional stressors and global threats such as ocean warming, acidification, extreme climate events and biological invasions. We offer a synthesis of this research using regime shifts as a unifying concept. We start with a brief introduction to regime shifts and the underlying theory, followed by a discussion of ongoing regime shifts in the Mediterranean, such as the transition from macroalgal forests to turf-dominated assemblages and the collapse of sessile organisms in response to heatwaves, species invasions, infectious diseases and pest metabolites. We then examine the implications of threshold-like biological responses and hysteresis for habitat restoration and rehabilitation. We conclude with an overview of the research that is needed to understand the interplay between species interactions and rapid environmental change, for which the Mediterranean is providing several dramatic examples.

Keywords

Mediterraneanregime shiftspecies invasionheatwavesglobal warmingmacroalgal forestsrestoration
Type
Chapter
Information
Interactions in the Marine Benthos
Global Patterns and Processes
 , pp. 190 - 213
Publisher: Cambridge University Press
Print publication year: 2019

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