|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 中国近海生物固碳强度与潜力显示文摘通过现场调查和数据分析,首次探讨了中国近海浮游植物的固碳强度与潜力以及近海人工养殖大型藻类的固碳能力。结果表明,渤、黄、东海的浮游植物固碳强度约为2.22亿t a^-1,固碳量的季节变化从大到小的顺序依次为春季、夏季、秋季、冬季,其中春夏季的固碳量占全年的65.3%。南黄海1999-2005年10-11月间浮游植物固碳强度有较大的年际变化,10-11月份7 a间其浮游植物最低固碳量为3.54万t d^-1,最高为16.58万t d^-1,平均为10.50万t d^-1,没有明显的年际变化趋势,磷对浮游植物固碳强度的影响最为明显,次之的影响因素是Chl a和亚硝氮(NO2-N)的含量。南海的固碳能力约为渤黄东海的2倍,为4.16亿t a^-1,其季节变化和渤黄东海不同,南海浮游植物在冬季的固碳能力最强,在夏季最弱。整个中国近海浮游植物年固碳量达6.38亿t,可占全球近海区域浮游植物年固碳量的5.77%。实际外海龙须菜的养殖发现,龙须菜每年固定的碳为8.18 t,养殖密度与方式对其产量和固碳量影响巨大。近几年,我国大型经济藻类养殖产量每年在120-150万t左右,换算为固碳量为36-45万t,平均每年40万t,如果海藻养殖产量每年增加5%,到2010年,我国大型经济藻类养殖的固碳量可达57万t a^-1,海藻养殖是海洋增加碳汇有多重价值的重要措施。 | 宋金明 李学刚 袁华茂 郑国侠 杨宇峰 | 2008 | 生态学报2008，28，2： | 69 |
| 2 | 中国近海生态系统碳循环与生物固碳显示文摘本文系统总结了近几年来中国近海海-气界面碳通量及控制因素、近海碳循环的关键过程以及近海生物固碳强度的研究进展,提出了中国近海渔业碳汇过程研究应关注的主要科学问题。近海海一气界面碳通量过程、生物泵过程、颗粒物沉降与释放以及捕捞/养殖碳转移过程是中国近海生态系统碳循环的主要控制过程。中国近海在总体上是大气二氧化碳的汇,年吸收3000万~5000万t碳,但在部分浅海海域如胶州湾、长江口等是大气二氧化碳的源;中国近海浮游植物的年固碳量可达6.39亿t,春季和夏季浮游植物固碳占全年的65.3%。南海浮游植物固碳达4.16亿t,为渤海、黄海和东海的2倍。渔业捕捞与海水养殖可明显增加海洋碳汇,仅就近几年大型藻养殖而言,每年可多固定40万t碳,如果每年的养殖量增加5%,到2020年大型藻养殖可固定碳93万t/年,所以,为增加渔业捕捞与海水养殖碳汇,必须加强揭示渔业碳汇海域生态环境、建立渔业碳增汇强度评估方法以及明确渔业资源利用碳再生循环周期等研究。 | 宋金明 | 2011 | 中国水产科学2011，18，3： | 32 |
| 3 | Characteristics of nitrogen forms in the southern Huanghai Sea surface sediments显示文摘The distributions of different forms of nitrogen in the surface sediments of the southern Huanghai Sea are different and affected by various factors. The contents of IEF-N, SOEF-N and TN gradually decrease eastward, and those of SAEF-N northward, while those of WAEF-N westward. Around the seaport of the old Huanghe (Yellow) River, the contents of both SOEF-N and TN are the highest. Among all the factors, the content of fine sediment is the predominant factor to affect the distributions of different forms of nitrogen. The contents of IEF-N, SOEF-N, and TN have visibly positive correlation with the content of f'me sediments, and the correlative coefficient is 0.68, 0.58 and 0.71 respectively, showing that the contents of the three forms of nitrogen increase with those of f-me sediments. The content of WAEF-N is related to that of fine sediments to a certain extent, with a correlative coefficient of 0.35; while the content of SAEF-N is not related to that of fine sediments, showing that the content of SAEF-N is not controlled by fine grain-size fractions of sediments. In addition, the distributions of different forms of nitrogen are also interacted one another, and the contents of IEF-N and SOEF-N are obviously affected by TN, while those of inorganic nitrogen (WAEF-N, SAEF-N and IEF-N) are not affected by SOEF-N and TN obviously, although they are interacted each other. | LüXiaoxia SONGJinming LIXuegang YUANHuamao ZHANTianrong LINing GAOXuelu | 2004 | Acta Oceanologica Sinica2004，23，3： | 7 |
| 4 | 滇池控藻围隔中水生植物和浮游藻类对不同形态铁浓度的影响显示文摘运用围隔试验来研究围隔生态系统内浮游藻类的组成和数量以及水生植物变化对不同形态铁浓度的影响,再反过来探讨微量元素铁在蓝藻水华暴发过程中对水生植物和浮游藻类生态生理的作用,从而为探索治理蓝藻水华的新途径提供基础证据。从2003年6月至10月,定期采样测定了控藻围隔水体中的亚铁、颗粒态铁(>0.22μm)、小胶体态铁(0.22~0.025μm)、溶解态铁(<0.025μm)的浓度和叶绿素a的浓度,同时对浮游藻类进行了组成鉴定和细胞计数。结果表明,不同形态的铁之间是可以相互转化的,胶体态铁比颗粒态铁活跃,是溶解态铁的一个储备库;亚铁与黄藻门细胞数存在显著正相关(r=0.858P=0.0004,N=20),其他形态的铁都与叶绿素a存在显著正相关(r=0.630,P=0.003,N=20);亚铁是浮游藻类和水生植物可以直接吸收利用的形态。围隔系统内浮游藻类的变化还不足以显著地改变铁的浓度,试验围隔内铁浓度的变化主要是因为水生植物的大量消耗。 | 邢伟 李敦海 沈银武 刘永定 | 2006 | 农业环境科学学报2006，25，6： | 5 |
| 5 | Spatial and temporal variations in pH and total alkalinity at the beginning of the rainy season in the Changjiang Estuary, China显示文摘The results of field observation carried out in May 2003 were used to examine pH and total alkalinity behaviors in the Changjiang Estuary. It was showed that pH and total alkalinity took on clear spatial variations in values with the minima in the low salinity region. Like salinity, transect distributions of pH and total alkalinity (TA) in a downriver direction had a sharp gradient each. These gradients appeared in such a sequence that the TA gradient was earlier than salinity and pH gradients, and the salinity gradient was earlier than the pH gradient. These distribution characteristics seemed to be strongly influenced by the mixing process of freshwater and seawater, for both pH and total alkalinity had significant linear relationships with salinity and temperature. For pH, phytoplankton activities also had a significant impact upon its spatial distribution. During a period of 48 h, pH and total alkalinity changed within wide ranges for every layer of the two anchor stations, namely, Stas 13 and 20, which were located at the mixed water mass and seawater mass, respectively. For both Stas 13 and 20, pH and TA fluctuation of every layer could be very wide during a 4 h period. As a whole, the data of the two anchor stations showed that neither variations in salinity and temperature nor phytoplankton activities were the main factors strongly influencing the total alkalinity temporal variability on a small time scale. The data of Sta. 20 implied that both salinity variation and phytoplankton activities had a significant influence on pH temporal variability, but the same conclusion could not be drawn from the data of Sta. 13. | GAO Xuelu SONG Jinming LI Xuegang YUAN Huamao LI Ning | 2005 | Acta Oceanologica Sinica2005，24，5： | 3 |
| 6 | Iron and inorganic carbon in Liaodong Gulf sediments of Bohai Sea in China显示文摘Iron in seawater is an essential trace metal for phytoplankton that plays an important role in the marine carbon cycle. But most studies focused on oceanic iron fertilization in high nutrient low chlorophyll (HNLC) seawaters. A study of inorganic carbon (IC) forms and its influencing factors was presented in Liaodong Gulf sediments, and especially the influence of iron was discussed in detail. Inorganic carbon in Liaodong Gulf sediments was divided into five forms: NaCl, NH_ 3·H_ 2O, NaOH, NH_ 2OH·HCl and HCl. The concentration of NaCl and NaOH forms were similar and they only occupied the minority of total inorganic carbon (TIC). However, NH_ 3·H_ 2O, NH_ 2OH·HCl and HCl forms were the principal forms of TIC and accounted for more than 80% of TIC. Especially, the percentage of NH_ 3·H_ 2O form was much higher than that in the Changjiang River Estuary and Jiaozhou Bay sediments. All forms of inorganic carbon were influenced by organic carbon,pore water, iron, pH, redox potential(Eh) and sulfur potential(Es) in sediments, moreover, the influences had different characteristics for different IC forms. However, the redox reactions of iron affected mainly active IC forms. Iron had little effect on NH_ 2OH·HCl and HCl forms of IC which were influenced mainly by pH. Iron had a stronger influence on NaCl, NaOH and NH_ 3·H_ 2O forms of IC; the influence of Fe 2+ was higher than Fe 3+ and its effect on NH_ 3·H_ 2O form was stronger than on NaCl and NaOH forms. | NIU Lifeng LI Xuegang SONG Jinming YUAN Huamao LI Ning DAI Jicui | 2006 | Acta Oceanologica Sinica2006，25，4： | 1 |
| 7 | 时政言论显示文摘财政部部长楼继伟称下一步将重点推动房地产税和个人所得税改革。 | | 2014 | 世界经济情况2014，，3： | 0 |
| 8 | 试论职业指导促进高职高专医学专业就业困难群体就业的作用和重要性显示文摘造成高职高专医学专业就业困难群体的原因是多层次、多方面的。毕业生应树立科学就业观,转变就业观念,努力提高综合素质,提升就业竞争力;同时,学校应坚持贯彻毕业生就业个体化指导,才能有效解决高职高专医学专业学生就业难的问题。 | 丁丁 | 2014 | 基层医学论坛2014，18，7： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员