New science informing effective management of the often overlooked deep-water seagrasses of tropical Australia

Chartrand, Katie, Rasheed, Michael, Bryant, Catherine, Pernice, Mathieu, and Ralph, Peter (2019) New science informing effective management of the often overlooked deep-water seagrasses of tropical Australia. In: [Presented at the Australian Marine Sciences Association 2019 Conference]. From: Australian Marine Sciences Association Conference 2019: Marine Science for a Blue Economy, 7-11 July 2019, Fremantle, WA, Australia.

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Over the last ten years, increased focus on protecting tropical seagrass communities adjacent to port facilities, particularly along the Great Barrier Reef coastline, has led to active management efforts to avert losses from acute and chronic stressors. Progress in defining critical light thresholds for a number of species has been regarded as best-practice for managing dredging activities for port expansions and maintenance. A recent study into the lesser studied deep-water seagrasses found these plant communities have the potential to provide a significant role in storing organic carbon over vast areas of the GBR Lagoon. In order to better understand the growth dynamics and how best to manage these potentially valuable blue carbon sink communities, we investigated the growth attributes and adaptation of deep-water (>10m) seagrass communities within three distinct meadows growing in the North and Central GBR. We measured the trends in above-ground biomass, seed banks, and environmental cues including light (quantity and quality) and temperature over a four-year period. We will discuss how a “onesize-fits-all” model for measuring impacts (i.e. light thresholds) to seagrasses can be problematic for these often over-looked, opportunistic species and what strategies can deliver positive outcomes for deep-water communities.

Item ID: 80213
Item Type: Conference Item (Abstract / Summary)
Keywords: deep-water seagrass, hormones, light thresholds, marine management, Halophila decipiens, Great Barrier Reef
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Date Deposited: 28 Aug 2023 23:10
FoR Codes: 41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management @ 40%
31 BIOLOGICAL SCIENCES > 3105 Genetics > 310505 Gene expression (incl. microarray and other genome-wide approaches) @ 25%
31 BIOLOGICAL SCIENCES > 3108 Plant biology > 310804 Plant developmental and reproductive biology @ 35%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1805 Marine systems and management > 180501 Assessment and management of benthic marine ecosystems @ 100%
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