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Salinity thresholds of Acropora spp. on the Great Barrier Reef

journal contribution
posted on 06.12.2017, 00:00 by R Berkelmans, Alison JonesAlison Jones, B Schaffelke
Salinity tolerances of reef corals have been experimentally investigated since the early twentieth century. Yet, nearly 100 years later, we are no closer to having a threshold that can be applied in studies of the impacts of freshwater runoff on coral communities. We present an empirically derived salinity threshold for sensitive Acropora species from the Keppel Islands in the southern inshore Great Barrier Reef (GBR), based on in situ salinity exposure and coral responses during a major flood event in 2010–2011. This threshold is presented as a dose-time response for a salinity-sensitive range of 22–28 PSU and an exposure time of 3–16 days at the lowest and highest salinities, respectively. The robustness of the salinity threshold was confirmed by comparison with responses of corals to low salinity 600 km north in the central GBR, which were exposed to substantially different turbidity and chlorophyll levels during the period of hypo-salinity.

History

Volume

31

Start Page

1103

End Page

1110

Number of Pages

8

eISSN

1432-0975

ISSN

0722-4028

Location

Germany

Publisher

Springer Verlag

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Australian Institute of Marine Science; Institute for Resource Industries and Sustainability (IRIS);

Era Eligible

Yes

Journal

Coral Reefs