open access

https://hdl.handle.net/2115/61463

Temporal variation of phytoplankton growth and grazing loss in the west coast of Peninsular Malaysia

英語

Straits of Malacca

2015-05

Springer

Environmental monitoring and assessment

187(5)

246

Phytoplankton growth (mu) and grazing loss (g) rates were measured monthly by the Landry-Hassett dilution method over a 2-year period at both estuarine (Klang) and coastal water (Port Dickson) systems along the Straits of Malacca. Chlorophyll a (Chl a) concentration ranged from 0.20 to 4.47 mu g L-1 at Klang except on two occasions when Chl a spiked above 10 mu g L-1. In contrast, Chl a concentrations were relatively stable at Port Dickson (0.14 to 2.76 mu g L-1). From the rate measurements, mu was higher (t=2.01, df=43, p<0.05) at Klang (0.30 to 2.26 day(-1)) than at Port Dickson (0.18 to 1.66 day(-1)), but g was not significantly different (p>0.80). g ranged from 0.30 to 1.50 and 0.21 to 1.51 day(-1) at Klang and Port Dickson, respectively. In this study, grazing loss was coupled to phytoplankton growth, and the ratio of g/mu or grazing pressure which estimates the proportion of primary production grazed was 50 % at Klang and lower than at Port Dickson (68 %; t=2.213, df=36, p<0.05). We found that the higher growth rates in a eutrophic system, i.e., Klang, were not matched by higher grazing loss, and this may have implications for the biogeochemical cycling in coastal waters.

学術雑誌論文

Accepted Manuscript

The final publication is available at Springer via http://dx.doi.org/10.1007/s10661-015-4487-5

0167-6369

1573-2959