1. Ocean School, Yantai University, Yantai 264005, China;
2. Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China
Abstract：The decomposition rate of Chaetomorpha sp.at different conditions and the release discipline of nutrients from the algal issue were studied in laboratory.The aim of this study was to explain the potential influence of Chaetomorpha decomposition on water quality in Swan Lake.The results showed that the decomposition rate of Chaetomorpha was significantly influenced by temperature (P<0.01),and high temperature (30℃) could promote the decomposition.However,the effects of sediment and nutrient level on algal decomposition were relatively small.During the early decomposition (0~7 d),the decomposition rate was large and a lot of phosphorus in algal issue was released into the water,while the nitrogen release was slow and last for a long time.The highest release rate of phosphorus reached to 91.63%,while the highest nitrogen release rate just reached to 73.01%.The release rate of nitrogen and phosphorus was obviously influenced by temperature and sediments (P<0.01).The effects of different factors on phosphorus release followed the order of temperature >sediment >nutrient level,while that of nitrogen release was sediment >temperature >nutrient level.The release rate of nitrogen and phosphorus was both higher on high temperature conditions.Therefore,the dying Chaetomorpha should be removed in time to avoid the deterioration of water quality and secondary pollution in the early autumn.
MENG Xiang-sen,SHAO Xue-lin,GAO Li et al. The research on nutrients release during the decomposition of Chaetomorpha sp.[J]. Marine Environmental Science, 2016, 35(4): 495-500.
GRAHAM M.Modern theory of exploiting a fishery and application to North Sea trawling[J].ConseilInternational pour I'Exploration, 1935, 37:199-204.
[2]
HEROES P J, BENNER R, COWIE G L.Tannin diagensis in mangrove leaves from a tropical estuary:A novel molecular approach[J].Geochmica et Cosmochimica Acta, 2001, 65(18):3109-3122.
[3]
ZhAO M S, ROSSITER D G, LI D C, et al.Mapping soil organic matter in low-relief areas based on land surface diurnal temperature difference and a vegetation index[J].Ecological Indicators, 2014, 39:120-133.
[4]
CHARNES A, COOPER W W, RHODES E.Measuring the efficiency of decision making units[J].European Journal of Operational Research, 1978, 2:429.
ZAPATA M, RODRÍGUEZ F, GARRIDO J L.Separation of chlorophylls and carotenoids from marine phytoplankton:a new HPLC method using are reversed phase C8 column and pyridine-containing mobile phases[J].Marine Ecology Progress Series, 2000, 195:29-45.
[10]
GOBLER C J, BONEILLO G E, DEBENHAM C J, et al.Nutrient limitation, organic matter cycling, and plankton dynamics during an Aureococcus anophagefferens bloom[J].Aquatic Microbial Ecology, 2004, 35:31-43.
SCHAEFER M B.A study of dynamics of the fishery for yellowfintunain the eastern tropical Pacific Ocean[J].Inter-American Tropical Tuna Commission Bulletin, 1957, 2:247-268.
LI K, GUAN B H, LIU Z W.Experiments on decomposition rate and release forms of nitrogen and phosphorus from the decomposing cyanobacterial detritus[J].Journal of Lake Science, 2011, 23(6):919-925.
[an error occurred while processing this directive] | [an error occurred while processing this directive]
