- Location
- 11756
With their train of thought they just might...arguing with an equation is like arguing with a wall...and they'll prolly do it
I can't wait to see what happens tonight when people are home 
Metal tolerance in the scleractinian coral Porites lutea. Harland, A. D.; Brown, B. E. Cent. Trop. Coastal Manage., Univ. Newcastle upon Tyne, Newcastle upon Tyne, UK. Marine Pollution Bulletin (1989), 20(7), 353-7.
Abstract
Exposure of the scleractinian coral P. lutea to elevated iron concns. leads to a loss of zooxanthellae (symbiotic algae) from the coral tissues. This response is very marked in corals not regularly exposed to high environmental concns. of iron. For corals exposed to daily run-off from an enriched iron effluent, the response is diminished, suggesting that these animals may have developed a tolerance to the metal. In the field, corals from a polluted site exhibited significantly higher levels of iron in their tissues than did those from an unpolluted location.
Response of a scleractinian coral, Stylophora pistillata, to iron and nitrate enrichment. Ferrier-Pages, Christine; Schoelzke, Vanessa; Jaubert, Jean; Muscatine, Len; Hoegh-Guldberg, Ove. Observatoire Oceanologique Europeen, Centre Scientifique de Monaco, Monaco, Monaco. Journal of Experimental Marine Biology and Ecology (2001), 259(2), 249-261.
Abstract
The purpose of this study was to det. whether the addn. of iron alone or in combination with nitrate affects growth and photosynthesis of the scleractinian coral, Stylophora pistillata, and its symbiotic dinoflagellates. For this purpose, the authors used three series of two tanks for a 3-wk enrichment with iron (Fe), nitrate (N) and nitrate + iron (NFe). Two other tanks were kept as a control (C). Stock solns. of FeCl3 and NaNO3 were dild. to final concns. of 6 nM Fe and 2 mM N and continuously pumped from batch tanks into the exptl. tanks with a peristaltic pump. Obtained showed that iron addn. induced a significant increase in the areal d. of zooxanthellae (ANOVA,; change from 6.3 ? 105 in the control to 8.5 ? 105 with iron). Maximal gross photosynthetic rates normalized per surface area also significantly increased following iron enrichment (ANOVA,; change from 1.23 for the control colonies to 1.81 mmol O2/cm2/h for the iron-enriched colonies). There was, however, no significant difference in the photosynthesis normalized on a per cell basis. Nitrate enrichment alone (2 mM) did not significantly change the zooxanthellae d. or the rates of photosynthesis. Nutrient addn. (both iron and nitrogen) increased the cell-specific d. of the algae (CSD) compared to the control (G-test, ?10-9), with an increase in the no. of doublets and triplets. CSD was equal to 1.70 in the Fe-enriched colonies, 1.54 in the N- and NFe-enriched colonies and 1.37 in the control. Growth rates measured after 3 wk in colonies enriched with Fe, N and NFe were 23%, 34% and 40% lower than those obtained in control colonies.
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Abstract
Exposure of the scleractinian coral P. lutea to elevated iron concns. leads to a loss of zooxanthellae (symbiotic algae) from the coral tissues. This response is very marked in corals not regularly exposed to high environmental concns. of iron. For corals exposed to daily run-off from an enriched iron effluent, the response is diminished, suggesting that these animals may have developed a tolerance to the metal. In the field, corals from a polluted site exhibited significantly higher levels of iron in their tissues than did those from an unpolluted location.
Response of a scleractinian coral, Stylophora pistillata, to iron and nitrate enrichment. Ferrier-Pages, Christine; Schoelzke, Vanessa; Jaubert, Jean; Muscatine, Len; Hoegh-Guldberg, Ove. Observatoire Oceanologique Europeen, Centre Scientifique de Monaco, Monaco, Monaco. Journal of Experimental Marine Biology and Ecology (2001), 259(2), 249-261.
Abstract
The purpose of this study was to det. whether the addn. of iron alone or in combination with nitrate affects growth and photosynthesis of the scleractinian coral, Stylophora pistillata, and its symbiotic dinoflagellates. For this purpose, the authors used three series of two tanks for a 3-wk enrichment with iron (Fe), nitrate (N) and nitrate + iron (NFe). Two other tanks were kept as a control (C). Stock solns. of FeCl3 and NaNO3 were dild. to final concns. of 6 nM Fe and 2 mM N and continuously pumped from batch tanks into the exptl. tanks with a peristaltic pump. Obtained showed that iron addn. induced a significant increase in the areal d. of zooxanthellae (ANOVA,; change from 6.3 ? 105 in the control to 8.5 ? 105 with iron). Maximal gross photosynthetic rates normalized per surface area also significantly increased following iron enrichment (ANOVA,; change from 1.23 for the control colonies to 1.81 mmol O2/cm2/h for the iron-enriched colonies). There was, however, no significant difference in the photosynthesis normalized on a per cell basis. Nitrate enrichment alone (2 mM) did not significantly change the zooxanthellae d. or the rates of photosynthesis. Nutrient addn. (both iron and nitrogen) increased the cell-specific d. of the algae (CSD) compared to the control (G-test, ?10-9), with an increase in the no. of doublets and triplets. CSD was equal to 1.70 in the Fe-enriched colonies, 1.54 in the N- and NFe-enriched colonies and 1.37 in the control. Growth rates measured after 3 wk in colonies enriched with Fe, N and NFe were 23%, 34% and 40% lower than those obtained in control colonies.
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Wow ,,i trun my head for a sec and 5 pages more ,cool or not ,I really hope this is helping other ppl ,,and Think the lady i spoke to thought i was kidding about how many ppl ,,,
Ok now i need to find screws for my Mag 18 ,,anyones help would be appreciated thk you
Ok now i need to find screws for my Mag 18 ,,anyones help would be appreciated thk you
- Location
- Vernon, NJ
some of those guys on RC are real knuckle heads
in the time they spent argueing they could have easily changed the screws cleaned the pump and moved on. some people just love to argue!
in the time they spent argueing they could have easily changed the screws cleaned the pump and moved on. some people just love to argue!
NYPDFrogman said:
right. I just loved the logic of people comparing the ocean to our tanks :bigeyes2: they would not let that theory go.
also as I pointed out in their photos they posted, there were no acroporas growing on all that rusty metal! Rich pointed that out as well. I never did hear a response to that.
Any time Shaun, any time.
- Location
- Vernon, NJ
ever wonder why our local waters are never really clear? I had this discussion with friends who worked at the New york Aquarium. the waters here are loaded with phosphate and micro algae flourishes! we have a ton of storm water that washes so much organic waste int o the local waters it isnt funny.
at one point we were dumping thousands of tons of solid human waste per day into the water 16 miles off shore. that has now ended and water qua is definitly improving.
comparing our tanks to the ocean? all I can figure is drugs, heavy drugs
at one point we were dumping thousands of tons of solid human waste per day into the water 16 miles off shore. that has now ended and water qua is definitly improving.
comparing our tanks to the ocean? all I can figure is drugs, heavy drugs
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