Effects of ocean sprawl on ecological connectivity: impacts and solutions

Melanie J. Bishop, Mariana Mayer-Pinto, Laura Airoldi, Louise B. Firth, Rebecca L. Morris, Lynette H. L. Loke, Stephen J. Hawkins, Larissa A. Naylor, Ross A. Coleman, Su Yin Chee, Katherine A. Dafforn

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The growing number of artificial structures in estuarine, coastal and marine environments is causing "ocean sprawl". Artificial structures do not only modify marine and coastal ecosystems at the sites of their placement, but may also produce larger-scale impacts through their alteration of ecological connectivity - the movement of organisms, materials and energy between habitat units within seascapes. Despite the growing awareness of the capacity of ocean sprawl to influence ecological connectivity, we lack a comprehensive understanding of how artificial structures modify ecological connectivity in near- and off-shore environments, and when and where their effects on connectivity are greatest. We review the mechanisms by which ocean sprawl may modify ecological connectivity, including trophic connectivity associated with the flow of nutrients and resources. We also review demonstrated, inferred and likely ecological impacts of such changes to connectivity, at scales from genes to ecosystems, and potential strategies of management for mitigating these effects. Ocean sprawl may alter connectivity by: (1) creating barriers to the movement of some organisms and resources - by adding physical barriers or by modifying and fragmenting habitats; (2) introducing new structural material that acts as a conduit for the movement of other organisms or resources across the landscape; and (3) altering trophic connectivity. Changes to connectivity may, in turn, influence the genetic structure and size of populations, the distribution of species, and community structure and ecological functioning. Two main approaches to the assessment of ecological connectivity have been taken: (1) measurement of structural connectivity - the configuration of the landscape and habitat patches and their dynamics; and (2) measurement of functional connectivity - the response of organisms or particles to the landscape. Our review reveals the paucity of studies directly addressing the effects of artificial structures on ecological connectivity in the marine environment, particularly at large spatial and temporal scales. With the ongoing development of estuarine and marine environments, there is a pressing need for additional studies that quantify the effects of ocean sprawl on ecological connectivity. Understanding the mechanisms by which structures modify connectivity is essential if marine spatial planning and eco-engineering are to be effectively utilised to minimise impacts.

LanguageEnglish
Pages7-30
Number of pages24
JournalJournal of Experimental Marine Biology and Ecology
Volume492
DOIs
Publication statusPublished - Jul 2017

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connectivity
oceans
marine environment
ocean
organisms
habitats
ecosystems
population distribution
engineering
community structure
planning
effect
estuarine environment
energy
nutrients
habitat
resource
genes
spatial planning
ecological impact

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • artificial structure
  • coastal engineering
  • eco-engineering
  • ecological connectivity
  • marine spatial planning
  • trophic connectivity

Cite this

Bishop, Melanie J. ; Mayer-Pinto, Mariana ; Airoldi, Laura ; Firth, Louise B. ; Morris, Rebecca L. ; Loke, Lynette H. L. ; Hawkins, Stephen J. ; Naylor, Larissa A. ; Coleman, Ross A. ; Chee, Su Yin ; Dafforn, Katherine A. / Effects of ocean sprawl on ecological connectivity : impacts and solutions. In: Journal of Experimental Marine Biology and Ecology. 2017 ; Vol. 492. pp. 7-30.
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Bishop, MJ, Mayer-Pinto, M, Airoldi, L, Firth, LB, Morris, RL, Loke, LHL, Hawkins, SJ, Naylor, LA, Coleman, RA, Chee, SY & Dafforn, KA 2017, 'Effects of ocean sprawl on ecological connectivity: impacts and solutions', Journal of Experimental Marine Biology and Ecology, vol. 492, pp. 7-30. https://doi.org/10.1016/j.jembe.2017.01.021

Effects of ocean sprawl on ecological connectivity : impacts and solutions. / Bishop, Melanie J.; Mayer-Pinto, Mariana; Airoldi, Laura; Firth, Louise B.; Morris, Rebecca L.; Loke, Lynette H. L.; Hawkins, Stephen J.; Naylor, Larissa A.; Coleman, Ross A.; Chee, Su Yin; Dafforn, Katherine A.

In: Journal of Experimental Marine Biology and Ecology, Vol. 492, 07.2017, p. 7-30.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Hawkins, Stephen J.

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AU - Coleman, Ross A.

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