福建漳江口红树林底质环境因子对底栖微藻初级生产力的影响
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摘要
本研究于2014年7月至2015年7月在福建漳江口红树林国家级自然保护区潮间带滩涂采集表层底质沉积物样品,研究环境因子对红树林生境底质中的底栖微藻总初级生产力、群落呼吸速率和群落净生产力的影响和调控机制.结果表明,红树林滩涂生境底质中底栖微藻总初级生产力为(2. 4±0. 8) mmol C/(m~2·h),与温度正相关,呈夏季高、冬季低的特点,温度是影响底栖微藻总初级生产力的主要环境因子;受红树林凋落物的影响,红树林生境底质中群落呼吸速率较高,使得秋、冬、春季一些月份群落净生产力出现负值,群落净生产力全年均值为(0. 5±1. 8) mmol C/(m~2·h),基本上处于二氧化碳收支平衡的状态.本研究显示底栖微藻的初级生产力影响了红树林生境底质的二氧化碳源汇格局,在红树林湿地碳循环中扮演重要的角色.
During the period from July 2014 to July 2015,we collected the surface sediment samples from the intertidal mudflat of the Fujian Zhangjiang Estuary Mangrove National Nature Reserve in the subtropical area. We are aiming to reveal the influence of environmental factors on the gross primary production of microphytobenthos,community respiration,and net community production,and its underlying mechanism. The results showed that the annually-average gross primary production of microphytobenthos was( 2. 4 ± 0. 8) mmol C/( m2·h),and the variability was positively correlated with temperature with character of higher value in summer but lower in winter. Temperature has been considered as the major environmental factor controlling the change of gross primary production in the study area. The community respiration rate in the sediment of mangrove forest tends to be high because of litter-fall. Thus,the community generally shows higher frequency of negative net production in some months of autumn,winter and spring. Howere,the annually-average net community production was( 0. 5 ± 1. 8) mmol C/( m2·h),indicating the balanced state of CO2 budget. Our study shows that the pattern of CO2 source and sink in the sediment of mangrove habitats is profoundly affected by the primary productivity of microphytobenthos,which has played important roles in the carbon cycling of mangrove ecosystem.
During the period from July 2014 to July 2015,we collected the surface sediment samples from the intertidal mudflat of the Fujian Zhangjiang Estuary Mangrove National Nature Reserve in the subtropical area. We are aiming to reveal the influence of environmental factors on the gross primary production of microphytobenthos,community respiration,and net community production,and its underlying mechanism. The results showed that the annually-average gross primary production of microphytobenthos was( 2. 4 ± 0. 8) mmol C/( m2·h),and the variability was positively correlated with temperature with character of higher value in summer but lower in winter. Temperature has been considered as the major environmental factor controlling the change of gross primary production in the study area. The community respiration rate in the sediment of mangrove forest tends to be high because of litter-fall. Thus,the community generally shows higher frequency of negative net production in some months of autumn,winter and spring. Howere,the annually-average net community production was( 0. 5 ± 1. 8) mmol C/( m2·h),indicating the balanced state of CO2 budget. Our study shows that the pattern of CO2 source and sink in the sediment of mangrove habitats is profoundly affected by the primary productivity of microphytobenthos,which has played important roles in the carbon cycling of mangrove ecosystem.
引文
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[7]王丹丹,高抒,杜永芬,等.江苏如东海岸互花米草盐沼沉积物叶绿素a分布特征[J].生态学杂志,2012,31(9):2 247-2 254.
[8]徐帅帅,邸宝平,王玉珏,等.我国典型潮间带底栖硅藻群落空间分布特征[J].海洋学报,2017,39(6):95-113.
[9]李欣,徐松立,肖武鹏,等.厦门筼筜湖潟湖底栖微藻光合色素的时空变化特征及与环境因子的关系[J].应用海洋学学报,2013,32(1):79-87.
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[11]尹晖,孙耀,石晓勇,等.乳山湾东流区滩涂底栖微藻现存量和初级生产力[J].渔业科学进展,2006,27(3):62-66.
[12]刘均玲,黄勃,梁志伟.东寨港红树林小型底栖动物的密度和生物量研究[J].海洋学报,2013,35(2):187-192.
[13]邱勇,李俊,黄勃,等.影响东寨港红树林中光背团水虱分布的生态因子研究[J].海洋科学,2013,37(4):21-25.
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[17]陈纪新,黄邦钦,贾锡伟,等.利用光合色素研究厦门海域超微型浮游植物群落结构[J].海洋环境科学,2003,22(3):16-21.
[18] MIGNA,DAVOULT D,SPILMONT N,et al. A closed-chamber CO2-flux method for estimating intertidal primary production and respiration under emersed conditions[J]. Marine Biology,2002,140(4):865-869.
[19] RAVEN J A,GEIDER R J. Temperature and algal growth[J]. New Phytologist,2010,110(4):441-461.
[20] BLANCHARD G F,GUARINI J M,GROS P,et al. Seasonal effect on the relationship between the photosynthetic capacity of intertidal microphytobenthos and temperature[J]. Journal of Phycology,2010,33(5):723-728.
[21] SALLEH S,MCMINN A. The effects of temperature on the photosynthetic parameters and recovery of two temperate benthic microalgae,Amphora cf. coffeaeformis and Cocconeis cf. Sublittoralis(Bacillariophyceae)[J]. Journal of Phycology,2011,47(6):1 413-1 424.
[22]穆文华,谢聿原,黄邦钦.厦门大嶝岛潮间带底栖微藻叶绿素荧光对温度和光照变化的响应[J].应用海洋学学报,2014,33(3):318-325.
[23]杜国英,郑异教,许恒龙.基于河口潮间带底栖微藻群落水平的环境质量状态评价[J].海洋学报,2015,35(6):112-120.
[24] SAUDOWILHELMY S A,TOVARSANCHEZ A,FU F X,et al. The impact of surface-adsorbed phosphorus on phytoplankton Redfield stoichiometry[J]. Nature,2004,432(7 019):897.
[25] AXELRAD D M,HICKMAN N J,GIBBS C F. Microalgal productivity as affected by treated sewage discharge to Port Phillip Bay[J]. Port Phillip Bay Environmental Study Werribee Project(PO1),Environmental Studies Series,1979,241:100-120.
[26]李万会,丁平兴.滩涂沉积物中叶绿素a浓度与沉积特性的关系[J].华东师范大学学报(自然科学版),2007,2007(4):26-33.
[27] GARRIGUE C. Distribution and biomass of microphytes measured by benthic chlorophyll a in a tropical lagoon(New Caledonia,South Pacific)[J]. Hydrobiologia,1998,385(1/3):1-10.
[28] CARTAXANA P,MENDES C R,LEEUWE V,et al. Comparative study on microphytobenthic pigments of muddy and sandy intertidal sediments of the Tagus estuary[J]. Estuarine,Coastal and Shelf Science,2006,66(1/2):225-230.
[29] MIGNA,DAVOULT D,SPILMONT N,et al. Spatial and temporal variability of CO2fluxes at the sediment-air interface in a tidal flat of a temperate lagoon(Arcachon Bay,France)[J]. Journal of Sea Research,2016,109:13-19.
[30] CLAVIER J,CHAUVAUD L,AMICE E,et al. Benthic metabolism in shallow coastal ecosystems of the Banc d’Arguin,Mauritania[J]. Marine Ecology Progress Series,2014,501:11-23.
[2] CAHOON L B,NEARHOOF J E,TILTON C L. Sediment grain size effect on benthic microalgal biomass in shallow aquatic ecosystems[J]. Estuaries,1999,22(3):735-741.
[3] JONGE V N D,BEUSELOM J E E V. Contribution of resuspended microphytobenthos to total phytoplankton in the EMS estuary and its possible role for grazers[J]. Netherlands Journal of Sea Research,1992,30(30):91-105.
[4]徐姗楠,陈作志,李适宇.红树林水生动物栖息地功能及其渔业价值[J].生态学报,2010,30(1):186-196.
[5]姜祖辉,陈瑞盛,王俊.胶州湾红岛潮间带底栖微藻种类组成及其生物量变化[J].渔业科学进展,2007,28(5):74-81.
[6]商栩,管卫兵,张经.长江口盐沼湿地底栖微藻的分布特征及其对有机质产出的贡献[J].海洋学报,2009,31(5):40-47.
[7]王丹丹,高抒,杜永芬,等.江苏如东海岸互花米草盐沼沉积物叶绿素a分布特征[J].生态学杂志,2012,31(9):2 247-2 254.
[8]徐帅帅,邸宝平,王玉珏,等.我国典型潮间带底栖硅藻群落空间分布特征[J].海洋学报,2017,39(6):95-113.
[9]李欣,徐松立,肖武鹏,等.厦门筼筜湖潟湖底栖微藻光合色素的时空变化特征及与环境因子的关系[J].应用海洋学学报,2013,32(1):79-87.
[10]宁修仁,刘子琳.象山港潮滩底栖微型藻类现存量的初级生产力[J].海洋学报,1999,21(3):98-105.
[11]尹晖,孙耀,石晓勇,等.乳山湾东流区滩涂底栖微藻现存量和初级生产力[J].渔业科学进展,2006,27(3):62-66.
[12]刘均玲,黄勃,梁志伟.东寨港红树林小型底栖动物的密度和生物量研究[J].海洋学报,2013,35(2):187-192.
[13]邱勇,李俊,黄勃,等.影响东寨港红树林中光背团水虱分布的生态因子研究[J].海洋科学,2013,37(4):21-25.
[14] MCMANUS J. Grain size determination and interpretation[C]∥TUCKE M. Techniques in Sedimentology. Oxford:Blackwell,1988:63-85.
[15] MILLIMAN J D,SHEN H T,YANG Z S,et al. Transport and deposition of river sediment in the Changjiang estuary and adjacent continental shelf[J]. Continental Shelf Research,1985,4(1):37-45.
[16]国家海洋局.海洋调查规范第4部分:海水化学要素调查:GB/T 12763. 4—2007[S].北京:中国标准出版社,2007.
[17]陈纪新,黄邦钦,贾锡伟,等.利用光合色素研究厦门海域超微型浮游植物群落结构[J].海洋环境科学,2003,22(3):16-21.
[18] MIGNA,DAVOULT D,SPILMONT N,et al. A closed-chamber CO2-flux method for estimating intertidal primary production and respiration under emersed conditions[J]. Marine Biology,2002,140(4):865-869.
[19] RAVEN J A,GEIDER R J. Temperature and algal growth[J]. New Phytologist,2010,110(4):441-461.
[20] BLANCHARD G F,GUARINI J M,GROS P,et al. Seasonal effect on the relationship between the photosynthetic capacity of intertidal microphytobenthos and temperature[J]. Journal of Phycology,2010,33(5):723-728.
[21] SALLEH S,MCMINN A. The effects of temperature on the photosynthetic parameters and recovery of two temperate benthic microalgae,Amphora cf. coffeaeformis and Cocconeis cf. Sublittoralis(Bacillariophyceae)[J]. Journal of Phycology,2011,47(6):1 413-1 424.
[22]穆文华,谢聿原,黄邦钦.厦门大嶝岛潮间带底栖微藻叶绿素荧光对温度和光照变化的响应[J].应用海洋学学报,2014,33(3):318-325.
[23]杜国英,郑异教,许恒龙.基于河口潮间带底栖微藻群落水平的环境质量状态评价[J].海洋学报,2015,35(6):112-120.
[24] SAUDOWILHELMY S A,TOVARSANCHEZ A,FU F X,et al. The impact of surface-adsorbed phosphorus on phytoplankton Redfield stoichiometry[J]. Nature,2004,432(7 019):897.
[25] AXELRAD D M,HICKMAN N J,GIBBS C F. Microalgal productivity as affected by treated sewage discharge to Port Phillip Bay[J]. Port Phillip Bay Environmental Study Werribee Project(PO1),Environmental Studies Series,1979,241:100-120.
[26]李万会,丁平兴.滩涂沉积物中叶绿素a浓度与沉积特性的关系[J].华东师范大学学报(自然科学版),2007,2007(4):26-33.
[27] GARRIGUE C. Distribution and biomass of microphytes measured by benthic chlorophyll a in a tropical lagoon(New Caledonia,South Pacific)[J]. Hydrobiologia,1998,385(1/3):1-10.
[28] CARTAXANA P,MENDES C R,LEEUWE V,et al. Comparative study on microphytobenthic pigments of muddy and sandy intertidal sediments of the Tagus estuary[J]. Estuarine,Coastal and Shelf Science,2006,66(1/2):225-230.
[29] MIGNA,DAVOULT D,SPILMONT N,et al. Spatial and temporal variability of CO2fluxes at the sediment-air interface in a tidal flat of a temperate lagoon(Arcachon Bay,France)[J]. Journal of Sea Research,2016,109:13-19.
[30] CLAVIER J,CHAUVAUD L,AMICE E,et al. Benthic metabolism in shallow coastal ecosystems of the Banc d’Arguin,Mauritania[J]. Marine Ecology Progress Series,2014,501:11-23.
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