Document Type



Western Australian Marine Science Institution


School of Science


McMahon, K., Lavery, P., McCallum, R. & Hernawan, U. (2017). Current state of knowledge regarding the effects of dredging-related ‘pressure’ on seagrasses. Report of Theme 5 - Project 5.1.1 prepared for the Dredging Science Node, Western Australian Marine Science Institution, Perth, Western Australia, 64 pp.


This review summarises our understanding, from a northwest of Western Australia and global perspective, the pressures seagrasses are exposed to from dredging, their tolerance thresholds and responses to dredging related stressors, and the bioindicators of dredging related stressors. From this information, we also identified gaps in our knowledge and areas where environmental management and monitoring approaches could be improved.


To determine the levels of stress (light reduction/sediment deposition) that occur under dredging conditions and evaluate the likely effect of these levels of pressure based on the existing seagrass literature, considering the range of variability and environmental quality conditions associated with dredging programs in WA. It sets the baseline on which experimental studies will build.

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Creative Commons Attribution 3.0 License
This work is licensed under a Creative Commons Attribution 3.0 License.