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http://hdl.handle.net/1834/787
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| Title: | The effect of copper on the daily growth rate and photosynthetic efficiency of the brown macroalga Padina boergesenii |
| Authors: | Pratap, H.B.
Mamboya, F.A.
Mtolera, M.S.P.
Björk, M. |
| ASFA Terms: | Copper
Algae |
| Issue Date: | 1999 |
| Publisher: | Bilateral Marine Science Programme |
| Citation: | Richmond, M.D. and Francis, J. (Eds.) Proceedings of the Conference on Advances on Marine Sciences in Tanzania, p.185-192 |
| Abstract: | The effect of copper (Cu) on the daily growth rate (DGR) and photosynthetic
efficiency (PE) of the brown macroalga Padina boergesenii was studied
under controlled laboratory conditions. The DGR was measured as an
increase in fresh weight while the PE was measured as the ratio of variable to
maximal chlorophyll fluorescence (Fv/Fm). Padina boegesenii were exposed
to 25, 50, 100 and 500mg Cu/l for 21 days. The DGR and PE of P. boergesenii
decreased significantly with an increase in copper concentration in the
growth media. This study shows that copper is acutely toxic to P. boergesenii
at concentrations higher than 500mg Cu/l. Low concentration of copper is
toxic to P. boergesenii after a prolonged exposure of 21 days. Similarly,
exposure time has a significant negative effect on both DGR and PE. |
| URI: | http://hdl.handle.net/1834/787 |
| Appears in Collections: | Miscellaneous
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