NDLI: Nitrogen and phosphorus intake by phytoplankton in the Xiamen Bay

Content Provider	Springer Nature Link
Author	Lin, Cai Li, Hui He, Qing Xu, Kuncan Wu, Shengsan Zhang, Yuanbiao Chen, Jinmin Chen, Baohong Lin, Libin Lu, Meiluan Chen, Weifen Tang, Rongkun Ji, Weidong
Copyright Year	2010
Abstract	This paper describes a time series experiment examining the nitrogen and phosphorus intake of natural phytoplankton communities by a microcosms approach. Seawater samples containing natural phytoplankton communities were collected from waters around Baozhu Islet in inner Xiamen Bay and around Qingyu Islet in the outer bay. The goal was to elucidate the relationship between phytoplankton population enhancement, the biological removal of nitrogen and phosphorus from the seawater, and the phytoplankton nitrogen and phosphorus intake ratio based on nitrogen and phosphorus removal from seawater by phytoplankton, to provide a basis for detecting prewarning conditions for red tide and the assessment of red tide events. Two key results were obtained: 1. During the experiment, the nitrogen and phosphorus seawater concentrations in samples from these two sites were negatively and closely correlated to the logarithm of the phytoplankton cell concentration and to the value of the apparent oxygen increment. The ratio of the intake coefficients was 3.5:1 for phosphorus and 1.1:1 for nitrogen for the phytoplankton between these samples from around Baozhu Islet and Qingyu Islet, respectively. This indicates that the intake capabilities of phytoplankton for nitrogen in the two waters are essentially identical. However, for phosphorus, the capability was much higher in the Baozhu Islet waters than the Qingyu Islet waters. In other words, the phytoplankton in Qingyu Islet waters produced more biomass while consuming the same amount of phosphorus as the other waters; 2. The phytoplankton nitrogen and phosphorus intake ratio from the Baozhu Islet and Qingyu Islet waters was 20:1 and 36:1, respectively. The latter waters had a significantly higher ratio than the former and both were higher than the Redfield Ratio. These results indicate that nitrogen and phosphorus intake ratios by phytoplankton can vary significantly from region to region.
Starting Page	99
Ending Page	105
Page Count	7
File Format	PDF
ISSN	02544059
Journal	Chinese Journal of Oceanology and Limnology
Volume Number	28
Issue Number	1
e-ISSN	19935005
Language	English
Publisher	SP Science Press
Publisher Date	2010-01-27
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	Xiamen Bay phytoplankton inorganic nitrogen phosphorus nitrogen and phosphorus intake by phytoplankton Oceanography
Content Type	Text
Resource Type	Article
Subject	Water Science and Technology Oceanography

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