Chartrand, Katie, Ralph, Peter, Petrou, Katherina, and Rasheed, Michael (2012) Development of a Light-Based Seagrass Management Approach for the Gladstone Western Basin Dredging Program. Report. Queensland Department of Agriculture, Fisheries and Forestry, Cairns, QLD, Australia.

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Abstract

This report presents a light-based management approach to protect Gladstone seagrasses from dredge plume impacts associated with the Western Basin dredging program. The management plan and trigger levels are based on findings from two years of seagrass research in Gladstone directed at establishing the required light levels for local seagrass survival.

The light trigger values and timelines for managing seagrass impacts are based on a multi-faceted approach including the ongoing Seagrass Health Study programs and a review of historical seagrass trends from permanent transect monitoring sites and associated benthic PAR recordings. This combined work has led to a working light trigger value of 6 mol m-2 d-1 over a rolling two week average, under which management actions and alerts are proposed to ensure appropriate steps are taken to mitigate seagrass declines.

Item ID:	80192
Item Type:	Report (Report)
Keywords:	seagrass, Zostera, light thresholds, dredging management
Copyright Information:	© The State of Queensland, Department of Agriculture, Fisheries and Forestry, 2012.
Date Deposited:	30 Aug 2023 01:29
FoR Codes:	41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management @ 60% 31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310806 Plant physiology @ 40%
SEO Codes:	18 ENVIRONMENTAL MANAGEMENT > 1805 Marine systems and management > 180501 Assessment and management of benthic marine ecosystems @ 60% 18 ENVIRONMENTAL MANAGEMENT > 1805 Marine systems and management > 180505 Measurement and assessment of marine water quality and condition @ 40%
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