Carbon,nitrogen and phosphorus stoichiometry in Saccharina japonica in Xihu harbor and its impact factors
YANG Lu
LI Xunmeng
WANG Kai
ZHANG Shouyu
CUI Xiao
WU Song
Abstract：The contents of carbon,nitrogen and phosphorus of Saccharina japonica at different growth stages are of great ecological significance to reveal the material circulation and energy flow.Through field investigation and indoor analysis,we measured the contents of C,N,P and the environmental characteristics of aquaculture waters at different growth stages of cultured S.japonica in Xihu harbor.at different growth stages,the content of C in S.japonica ranged from 37.62％to 38.62％,with an average of 37.98±0.38％.With the growth of seaweed,the contents of N and P decreased gradually.N content ranged from 2.33％to 4.25％with an average of 3.33±0.75％.P content varied between 0.15％and 0.30％with an average of 0.20±0.06％.The N/P of seaweed remained stable,with an average of 14.54±1.31.C/N and C/P increased gradually with the growth of S.japonica.The C/N ranged from 9.10 to 16.43 with an average of 12.10±3.00,and C/P ranged from 126.50 to 248.53 with an average of 175.10+51.51.The contents of nitrogen and phosphorus in S.japonica respond significantly to environmental factors and growth characteristics.The main factors are salinity,pH and nutrients.The changes of C/N and C/P reflect that the nutrient utilization efficiency to N and P increases with the rapid growth of S.japonica.
Keywords：Saccharina japonicaCarbonNitrogenPhosphorusecology
Publication Date：2025-02-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 96-104 )