[Coral-List] (no subject)
carmen_schloeder at hotmail.com
Wed Oct 13 14:05:26 EDT 2004
there's a lot of reserach going on in terms of of nutrient enrichment on
corals. In general, increases in zooxanthellae density and chlorophyll
concentrations are observed, when nitrate is added to reef-building corals.
In the ENCORE, they observed mortality and reduced growth of corals at a
nitrate dosage of 36 uM, and coral reproduction was negatively affected. In
our study, P. damicornis subjected to nitrate (20 uM) showed bleaching due
to the loss of zooxanthellae.
You might also check the following literature for further details:
Schloeder C., D'Croz L., 2004. Responses of massive and branching coral
species to the combined effects of water temperature and nitrate enrichment.
J Exp Mar Biol Ecol, in press.
Mate J.L., 1997. Experimental responses of Panamenian reef corals to high
temperature and nutrients. Proc 8th Int Coral Reef Symp 1:515-520
Koop et al., 2001. ENCORE: the effectof nutrient enrichment on coral reefs.
Synthesis of results and conclusions. Mar Poll Bull 42(2):91-120
Nordemar et al., 2003. Effects of elevated seawater temperature and nitrate
enrichment on the branching coral Porites cylindrica in the absence of
particulate food. Mar Biol 142:669-677
Jokiel et al., 1991. Results of the 1991 United States-Israel Workshop,
Nutrient limitation in the symbiotic association between zooxanthellae and
reef-building corals. Pac Sci 48(3):215-218
From: gemma franklin
To: Corall-List Subscribers
Sent: Monday, October 11, 2004 2:32 PM
Subject: [Coral-List] Nitrate levels
Hi. I'm currently volunteering in Cozumel, Mexico, working for the National
Marine Park and one of the researchers wondered if someone could help with
information about Nitrates and their effects on coral.
Does anyone know what levels are critical for coral to survive and what the
effects are if Nitrate evels are too high? Or have any papers they could
direct me to for information?
Thanks in advance for any information you may have on this. I would be very
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