Three cruises were investigated respectively in May,July and November 2016 in the artificial reef area of 2010,2012,and 2014 and the non-artificial reef area(control area)in the coastal area of Tianjin.Each area had 3...Three cruises were investigated respectively in May,July and November 2016 in the artificial reef area of 2010,2012,and 2014 and the non-artificial reef area(control area)in the coastal area of Tianjin.Each area had 3 sampling stations,a total of 12 sites.The result showed that 58 taxa of phytoplankton were identified which belongs to 2 phyla 28 genera,Among these species,bacillariophyta including 19 genera 44 species,pyrrhophyta including 9 genera and 14 species.Give priority to with diatom species,accounting for 75.9%of the total species,followed by dinoflagellates,accounting for 24.1%.Dominant phytoplankton species give priority to with coscinodiscus and Chaetoceros of bacillariophyta,mainly including Coscinodiscus wailesii,C.asteromphalus,C.granii,C.oculus-iridis,C.spp.,Chaetoceros castracanei,C.lorenzianus,C.curvisetus,Pseudo-nitzschiapungens,Guianardia delicatula,Rhizosolenia setigera,Proboscia alata f.indica and Noctilluca scintillans.Phytoplankton cell abundance revealed obviously seasonal changes,the average cell abundance respectively was 94.79×10^4 cells/m^4、39.53×10^4 cells/m^4 and 21.5×10^4 cells/m^3.Phytoplankton diversity index has obviously seasonal variation,and in November,shannon-wiener diversity index,Margalef index and Pielou index are higher than in May and July.Comparing the artificial reef areas with the control area,the phytoplankton cells abundance of the control area in May was significantly higher than the artificial reef areas.In July and November,the artificial reef area of 2014 phytoplankton cell abundance was significantly higher than other artificial reef area and the control area.Diversity index of phytoplankton in the control area and the artificial reef of 2012 was lower than the artificial reef area of 2010 and 2014,and lowest in non-artificial reef areas.Obviously,the construction of artificial reef had significant effect for the improvement of the phytoplankton community diversity,but the phytoplankton community diversity is not always increasing and fluctuating to a certain extent as time goes by.展开更多
Introduces the development connotation,development ideas,practice history and future prospects of Tianjin Ocean Ranch under the background of the development of national marine pastures.Combine the development process...Introduces the development connotation,development ideas,practice history and future prospects of Tianjin Ocean Ranch under the background of the development of national marine pastures.Combine the development process of China's marine pastures with the practice of Tianjin Ocean Ranch,the development characteristics of Tianjin marine pastures are analyzed.It is concluded that,for the future construction of Tianjin Ocean Ranch,we can focus on promoting the transformation of marine development mode to recycling,and construct a marine space development pattern of land-sea coordination and human-sea harmony,in order to accelerate the realization of Tianjin's"One Base and Three Districts"objective.We will make greater contributions to the quality of a well-off society and the creation of a beautiful new environment in Tianjin.Modern marine pastures are a long-term,complex and scientific systematic project that requires great attention and attention from all walks of life.展开更多
文摘Three cruises were investigated respectively in May,July and November 2016 in the artificial reef area of 2010,2012,and 2014 and the non-artificial reef area(control area)in the coastal area of Tianjin.Each area had 3 sampling stations,a total of 12 sites.The result showed that 58 taxa of phytoplankton were identified which belongs to 2 phyla 28 genera,Among these species,bacillariophyta including 19 genera 44 species,pyrrhophyta including 9 genera and 14 species.Give priority to with diatom species,accounting for 75.9%of the total species,followed by dinoflagellates,accounting for 24.1%.Dominant phytoplankton species give priority to with coscinodiscus and Chaetoceros of bacillariophyta,mainly including Coscinodiscus wailesii,C.asteromphalus,C.granii,C.oculus-iridis,C.spp.,Chaetoceros castracanei,C.lorenzianus,C.curvisetus,Pseudo-nitzschiapungens,Guianardia delicatula,Rhizosolenia setigera,Proboscia alata f.indica and Noctilluca scintillans.Phytoplankton cell abundance revealed obviously seasonal changes,the average cell abundance respectively was 94.79×10^4 cells/m^4、39.53×10^4 cells/m^4 and 21.5×10^4 cells/m^3.Phytoplankton diversity index has obviously seasonal variation,and in November,shannon-wiener diversity index,Margalef index and Pielou index are higher than in May and July.Comparing the artificial reef areas with the control area,the phytoplankton cells abundance of the control area in May was significantly higher than the artificial reef areas.In July and November,the artificial reef area of 2014 phytoplankton cell abundance was significantly higher than other artificial reef area and the control area.Diversity index of phytoplankton in the control area and the artificial reef of 2012 was lower than the artificial reef area of 2010 and 2014,and lowest in non-artificial reef areas.Obviously,the construction of artificial reef had significant effect for the improvement of the phytoplankton community diversity,but the phytoplankton community diversity is not always increasing and fluctuating to a certain extent as time goes by.
文摘Introduces the development connotation,development ideas,practice history and future prospects of Tianjin Ocean Ranch under the background of the development of national marine pastures.Combine the development process of China's marine pastures with the practice of Tianjin Ocean Ranch,the development characteristics of Tianjin marine pastures are analyzed.It is concluded that,for the future construction of Tianjin Ocean Ranch,we can focus on promoting the transformation of marine development mode to recycling,and construct a marine space development pattern of land-sea coordination and human-sea harmony,in order to accelerate the realization of Tianjin's"One Base and Three Districts"objective.We will make greater contributions to the quality of a well-off society and the creation of a beautiful new environment in Tianjin.Modern marine pastures are a long-term,complex and scientific systematic project that requires great attention and attention from all walks of life.
