A field study on the conversion ratio of phytoplankton biomass carbon to chlorophyll-<Emphasis Type="Italic">a</Emphasis> in Jiaozhou Bay,China |
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| Authors: | Shuguo Lü Xuchen Wang Boping Han |
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| Institution: | [1]Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences Qingdao 266071, China [2]Graduate School, Chinese Academy of Sciences, Beijing 100039, China [3]Hainan Research Academy of Environmental Sciences, Haikou 570206, China [4]Institute of Hydrobiology, Jinan University, Guangzhou 510632, China |
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| Abstract: | A one-year field study was conducted to determine the conversion ratio of phytoplankton biomass carbon (Phyto-C) to chlorophyll-a (Chl-a) in Jiaozhou Bay, China. We measured suspended particulate organic carbon (POC) and phytoplankton Chl-a samples collected in surface water monthly from March 2005 to February 2006. The temporal and spatial variations of Chl-a and POC concentrations were observed in the bay. Based on the field measurements, a linear regression model II was used to
generate the conversion ratio of Phyto-C to Chl-a. In most cases, a good linear correlation was found between the observed POC and Chl-a concentrations, and the calculated conversion ratios ranged from 26 to 250 with a mean value of 56 μg μg?1. The conversion ratio in the fall was higher than that in the winter and spring months, and had the lowest values in the
summer. The ratios also exhibited spatial variations, generally with low values in the near shore regions and relatively high
values in offshore waters. Our study suggests that temperature was likely to be the main factor influencing the observed seasonal
variations of conversion ratios while nutrient supply and light penetration played important roles in controlling the spatial
variations. |
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| Keywords: | chlorophyll-a Phyto-C/Chl-a ratio suspended particulate organic carbon Model II regression Jiaozhou Bay |
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