[Coral-List] Salinity and temp tolerance in seagrasses

Phelan, Joe J Joe.Phelan at mottmac.com
Wed Oct 8 09:48:26 EDT 2008


Hi Jeremy,

The change in delta T is affected by the desalination plant switching to
a winter operating regime. This involves recirculating the sea water
through the system to improve efficiencies in the desalination process
resulting for example in a saltier outfall during winter. 

The winter plume behaviour will be different and so when you split your
analysis seasonally you should be careful to revise your plume
extent/area of influence assuming you have attempted to accurately
predict this via modelling.

regards,

Joe.

Joe Phelan
BSc PhD
Marine Biologist
Mott MacDonald
Abu Dhabi
-----Original Message-----
From: coral-list-bounces at coral.aoml.noaa.gov
[mailto:coral-list-bounces at coral.aoml.noaa.gov] On Behalf Of Medio,
David
Sent: 07 October 2008 20:03
To: coral-list at coral.aoml.noaa.gov
Subject: [Coral-List] Salinity and temp tolerance in seagrasses

Jeremy

 

I have observed healthy seagrass beds in Qatar, UAE (Abu Dhabi, Umm al
Quwain, RAK etc) and agree with comments already posted. Seagrasses in
this part of the world have developed tolerance levels to high salinity
(up to 50ppt in some cases) and temperature, the latter not so much the
highs but the range (low teens to mid forties in sheltered shallow
bays).

 

The crucial issue will be the Delta T in the winter more than the summer
given that you may have a significant differential then. Also with blade
shedding in winter, seagrasses may be more vulnerable to large T
differentials.

 

David

 

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Visit our website at http://www.halcrow.com
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