The transformation of the nutrient in the degradation process of the phytoplankton-derived particulate organic matter and it's ecological effect
HE Dong1,2, ZHANG Yi-ming2, YANG Fei2, LIU Zhuang2, WANG Yu2, LIU Qi-gen1, CHAO Jian-ying2
1. Shanghai Ocean University, Shanghai 201306, China;
2. Nanjing Institute of Environmental Science, Ministry of Environmental Protection, Nanjing 210042, China
The phytoplankton-derived particulate organic matter was taken in Lake Taihu as the breakthrough point.We studied the changing process of the C, N & P elements in the degradation process of the phytoplankton-derived particulate organic matter under the different environmental conditions (light or dark), and analyzed the role of phytoplankton-derived particulate organic matter in the nutrient water cycling and the growth of phytoplankton. During the cyanobacteria blooms, the contents of C, N & P in the phytoplankton-derived particulate organic matter can account for 81.51%, 94.60% and 97.47% of the total content in the water respectively at most, and they were the important parts of the nutrient elements in the water. The APA under the light condition was significantly higher than that in the dark, which showed that the rate of degradation and transformation of P in the particulate organic matter under the light condition is significantly higher than that in the dark. However, the concentration of SRP under the light condition was less than that in the dark and the concentration of Chl-a was higher. The algae grew along with the degradation of the particulate organic matter under the light condition, absorbing the SRP in the water and converted to biomass. The light had a significant impact on the degradation of the C, N & P, for the degradation rates of the C, N & P in the dark were twice that in the light, and the proportion of degradable in the dark was 2.5±0.1 times of that in the light. The degradation of each element during the first seven days was higher than that after the seventh day. In conclusion, the nutrient in phytoplankton-derived particulate organic matter with high yield gross, biological availability, rapid degradation, and degradation products could be assimilated by the phytoplankton, was the important nutrient sources of algae growth.
何东, 张毅敏, 杨飞, 刘庄, 王宇, 刘其根, 晁建颖. 太湖藻源性颗粒物降解过程中营养盐转化及其生态效应[J]. 中国环境科学, 2016, 36(3): 899-907.
HE Dong, ZHANG Yi-ming, YANG Fei, LIU Zhuang, WANG Yu, LIU Qi-gen, CHAO Jian-ying. The transformation of the nutrient in the degradation process of the phytoplankton-derived particulate organic matter and it's ecological effect. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(3): 899-907.
Sannigrahi P, Ingall E D, Benner R. Nature and dynamics of phosphorus-containing components of marine dissolved and particulate organic matter[J]. Geochimica Et Cosmochimica Acta, 2006,70(23):5868-5882.
[2]
Volkman J K, Tanoue E. Chemical and biological studies of particulate organic matter in the ocean[J]. Journal of Oceanography, 2002,58(2):265-279.
[3]
Poulomi S, Ingall E D, Ronald B. Cycling of dissolved and particulate organic matter at station Aloha: Insights from 13C NMR spectroscopy coupled with elemental, isotopic and molecular analyses[J]. Deep Sea Research Part I: Oceanographic Research Papers, 2005,52(8):1429-1444.
[4]
Smith D C, Simon M, Alldredge A L, et al. Intense hydrolytic enzyme activity on marine aggregates and implications for rapid particle dissolution[J]. Nature, 1992,359(6391):139-142.
[5]
Frka S, Gašparovi? B, Mari? D, et al. Phytoplankton driven distribution of dissolved and particulate lipids in a semi-enclosed temperate sea (Mediterranean): Spring to summer situation[J]. Estuarine, Coastal and Shelf Science, 2011,93(4):290-304.
[6]
Yoshimura T, Nishioka J, Saito H, et al. Distributions of particulate and dissolved organic and inorganic phosphorus in North Pacific surface waters[J]. Marine Chemistry, 2007,103(1): 112-121.
[7]
Wetz M S, Wheeler P A. Production and partitioning of organic matter during simulated phytoplankton blooms[J]. Limnology & Oceanography, 2003,48(5):1808-1817.
Guinder V A, Popovich C A, Perillo G M. Particulate suspended matter concentrations in the Bahía Blanca Estuary, Argentina: implication for the development of phytoplankton blooms[J]. Estuarine, Coastal and Shelf Science, 2009,85(1):157-165.
[10]
Taylor W D, Hudson J J, Schindler D W. Planktonic Nutrient Regeneration And Cycling Efficiency In Temperate Lakes[J]. Nature International Weekly Journal of Science, 1999,400(6745): 659-661.
Halemejko G Z, Chrost R J. The role of phosphatases in phosphorus mineralization during decomposition of lake phytoplankton blooms[J]. Archiv. Fur Hydrobiologie Stuttgart, 1984,101(4):489-502.
Ye L, Shi X, Wu X, et al. Nitrate limitation and accumulation of dissolved organic carbon during a spring-summer cyanobacterial bloom in Lake Taihu (China)[J]. Journal of Limnology, 2012, 71(1):67-71.
Aspila K I, Agemian H, Chau A S Y. A semi-automated method for the determination of inorganic, organic and total phosphate in sediments[J]. Analyst, 1976,101(1200):187.
Chrost R J. A method for determining enzymatically hydrolyzable phosphate (EHP) in natural waters[J]. Limnology and Oceanography, 1986,31(3):662-667.
[23]
Chuai X, Ding W, Chen X, et al. Phosphorus release from cyanobacterial blooms in Meiliang Bay of Lake Taihu, China[J]. Ecological Engineering, 2011,37(6):842-849.
[24]
Huang Q, Wang Z, Wang D, et al. Distribution and origin of biologically available phosphorus in the water of the Meiliang Bay in summer[J]. Science in China, 2006,49(1Supplement): 146-153.
Magen C, Chaillou G L, Crowe S A, et al. Origin and fate of particulate organic matter in the southern Beaufort Sea-Amundsen Gulf region, Canadian Arctic[J]. Estuarine Coastal & Shelf Science, 2010,86(1):31-41.
[30]
Redfield A C. The influence of organisms on the composition of sea-water[J]. The Sea, 1963,26-77.
[31]
Burkhardt B G, Watkins-Brandt K S, Defforey D, et al. Remineralization of phytoplankton-derived organic matter by natural populations of heterotrophic bacteria[J]. Marine Chemistry, 2014,163(4):1-9.
[32]
Arrigo K R. Erratum: Marine microorganisms and global nutrient cycles[J]. Nature, 2005,438(7057):349-355.
Berman T. The role of DON and the effect of N: P ratios on occurrence of cyanobacterial blooms: Implications from the outgrowth of Aphanizomenon in Lake Kinneret[J]. Limnology & Oceanography, 2001,46(2):443-447.
[35]
Bai X, Ding S, Fan C, et al. Organic phosphorus species in surface sediments of a large, shallow, eutrophic lake, Lake Taihu, China[J]. Environmental Pollution, 2009,157(8/9):2507-2513.
[36]
Blomqvist P, Pettersson A, Hyenstrand P. Ammonium-nitrogen: a key regulatory factor causing dominance of non-nitrogen-fixing cyanobacteria in aquatic systems[J]. Archiv. Für Hydrobiologie, 1994,132(2):141-164.