Horizontal distribution of extracellular enzyme activities in the Yellow Sea and the East China Sea in spring

Zhang Zhengyu; Tian Jiyuan; Yu Juan; Yang Guipeng; Cui Yu; Chen Deping; Gao Ping; Xu Rui; Chen Rong

doi:10.3969/j.issn.0253-4193.2020.04.001

Volume 42 Issue 4

Nov. 2020

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Zhang Zhengyu，Tian Jiyuan，Yu Juan, et al. Horizontal distribution of extracellular enzyme activities in the Yellow Sea and the East China Sea in spring[J]. Haiyang Xuebao，2020, 42(4)：1–11，doi:10.3969/j.issn.0253−4193.2020.04.001

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Horizontal distribution of extracellular enzyme activities in the Yellow Sea and the East China Sea in spring

doi: 10.3969/j.issn.0253-4193.2020.04.001

Zhang Zhengyu^1
,,
Tian Jiyuan³,
Yu Juan^{1, 2
,
,},
Yang Guipeng^{1, 2},
Cui Yu¹,
Chen Deping¹,
Gao Ping⁴,
Xu Rui¹,
Chen Rong¹

1.
Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China
2.
Marine Ecology and Environmental Science Laboratory, Pilot National Laboratory for Marine science and Technology (Qingdao), Qingdao 266071, China
3.
College of Food Science and Engineering, Qingdao Agricultural University, Qingdao 266109, China
4.
First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China

Received Date: 2019-05-27
Rev Recd Date: 2019-09-16

Available Online: 2020-11-18

Publish Date: 2020-04-25

Abstract

Abstract

The extracellular enzyme activity of seawater can indicate the distribution characteristics of organic and the nutritional status of microorganisms. Activities of eight extracellular enzymes, including alkaline phosphatase, lipase, leucine aminopeptidase, chitinase, cellulose, xylosidase, α-D-glucosidase and β-D-galactosidase, were measured in the surface seawaters collected from 44 stations of the Yellow Sea and the East China Sea from March 25 to April 15, 2017 and from 10 stations of the Jiaozhou Bay nearby waters from April 28 to 29, 2018. In the spring of 2017, the high-value areas of alkaline phosphatase and lipase appeared in the northern coast of Jiangsu and the middle of the Yellow Sea, alkaline phosphatase activity and phosphate concentration were positively correlated. High activity areas of the other six enzymes (leucine aminopeptidase, chitinase, cellulose, xylosidase, α-D-glucosidase and β-D-galactosidase) appeared in the open sea outside the east of the Changjiang River Estuary. The average activities of β-D-galactosidase and xylosidase were significantly higher in the East China Sea than in the Yellow Sea. The decreasing order of average enzyme activities of the eight enzymes was as follows: alkaline phosphatase, lipase, leucine aminopeptidase, chitinase, α-D-glucosidase, β-D-galactosidase, cellulose, xylosidase, the values of α-D-glucosidase and β-D-galactosidase are proximate. The activities of alkaline phosphates, lipase and xylosidase in the Jiaozhou Bay nearby waters in spring 2018 decreased from nearshore to far shore. The decreasing order of the average enzyme activity of the eight enzymes was as follows: alkaline phosphatase, lipase, leucine aminopeptidase, xylosidase, α-D-glucosidase, β-D-galactosidase, cellulose, chitinase, the values of cellulose and chitinase are proximate. The alkaline phosphatase and lipase activities in the Yellow Sea were significantly higher than those in the East China Sea and Jiaozhou Bay. The average enzymatic activities of polysaccharide hydrolases (chitinase, cellulose, α-D-glucosidase, β-D-galactosidase and xylosidase) were the lowest in the Yellow Sea compared with those in the East China Sea and Jiaozhou Bay nearby waters. Our results are beneficial to understand the degradation of organic carbon by plankton and heterotrophic bacteria and the distribution of marine organic carbon in the coastal water of China.
- extracellular enzyme activity,
- alkaline phosphatase,
- leucine aminopeptidase,
- lipase

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References(47)

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