NESP TWQ Project 3.3 - Light thresholds for seagrasses of the GBR: a synthesis and guiding document for managing seagrass, 2015-2015 (JCU)

Updated: 2026-06-25

Light levels (i.e. water quality/turbidity) can be managed to minimise seagrass losses. Recent attempts to define threshold levels of light required to maintain GBR seagrass state has resulted in a spectrum of recommendations with no single definitive source document to guide regulation. We will compile the available information on light thresholds into a guiding document, which will become a key reference for managers and regulators to use in generating relevant water quality guidelines and conditions for developments such as dredging programs. It will also highlight research information needs and provide interim guidelines for immediate management application.