We measured the organic content and sinking velocities of biodeposits from two scallop species(Chlamys farreri,Patinopecten yessoensis) and abalone(Haliotis discus hannai) that were cultured on suspended long-lines.Me...We measured the organic content and sinking velocities of biodeposits from two scallop species(Chlamys farreri,Patinopecten yessoensis) and abalone(Haliotis discus hannai) that were cultured on suspended long-lines.Measurements were conducted every two months from April 2010 to February 2011.The shellfish were divided into three size groups(small,middle,and big sizes).At each sample point,we assessedbiodeposit organic content,average sinking velocity,the frequency distribution of sinkingvelocities,and the correlation between organic content and sinking velocity.The organic content of biodeposits varied significantly among months(P<0.05) and the pattern of change varied among species.Sinking velocities varied significantly,ranging from <0.5 cm/s to >1.9 cm/s.The sinking velocities of biodeposits from C.farreri and P.yessoensis were 0.5-1.5 cm/s and from H.discus hannai were <0.7 cm/s.The organic content was significantly negatively correlated to the sinking velocity of biodeposits in C.farreri(P<0.001) and P.yessoensis(P<0.05).展开更多
The average swelling height of Qinghai-Xizang Plateau(Tibet) is about 4.1 km.The area is about 2 300 000 km2.It is the highest and the largest plateau in the world.Mount Qomolangma,the highest peak in the world,is loc...The average swelling height of Qinghai-Xizang Plateau(Tibet) is about 4.1 km.The area is about 2 300 000 km2.It is the highest and the largest plateau in the world.Mount Qomolangma,the highest peak in the world,is located in the southern fringe of the plateau,and its height is still increasing.What is the driving force for the rising of the Qinghai-Xizang plateau?How high will the plateau still rise from now on? These questions are much concerned by people.In this paper the distribution of the pressure at different depths in the region of Qinghai-Xizang Plateau are derived according to the three-dimensional structures of the S-wave velocity in the crust and upper mantle.The crust and upper mantle structures of the Qinghai-Xizang Plateau is deliberated on the basis of the distribution with a comprehensive analysis on the rock types,earthquakes and the relative crust movements.Then the two questions raised above are discussed.展开更多
基金Supported by the National Key Technology Research and Development Program of China(No.2011BAD13B06)the National Natural Science Foundation of China(No.41276172)the Special Scientific Research Funds For Central Non-Profit Institute,CAFS(No.2014A01YY01)
文摘We measured the organic content and sinking velocities of biodeposits from two scallop species(Chlamys farreri,Patinopecten yessoensis) and abalone(Haliotis discus hannai) that were cultured on suspended long-lines.Measurements were conducted every two months from April 2010 to February 2011.The shellfish were divided into three size groups(small,middle,and big sizes).At each sample point,we assessedbiodeposit organic content,average sinking velocity,the frequency distribution of sinkingvelocities,and the correlation between organic content and sinking velocity.The organic content of biodeposits varied significantly among months(P<0.05) and the pattern of change varied among species.Sinking velocities varied significantly,ranging from <0.5 cm/s to >1.9 cm/s.The sinking velocities of biodeposits from C.farreri and P.yessoensis were 0.5-1.5 cm/s and from H.discus hannai were <0.7 cm/s.The organic content was significantly negatively correlated to the sinking velocity of biodeposits in C.farreri(P<0.001) and P.yessoensis(P<0.05).
文摘The average swelling height of Qinghai-Xizang Plateau(Tibet) is about 4.1 km.The area is about 2 300 000 km2.It is the highest and the largest plateau in the world.Mount Qomolangma,the highest peak in the world,is located in the southern fringe of the plateau,and its height is still increasing.What is the driving force for the rising of the Qinghai-Xizang plateau?How high will the plateau still rise from now on? These questions are much concerned by people.In this paper the distribution of the pressure at different depths in the region of Qinghai-Xizang Plateau are derived according to the three-dimensional structures of the S-wave velocity in the crust and upper mantle.The crust and upper mantle structures of the Qinghai-Xizang Plateau is deliberated on the basis of the distribution with a comprehensive analysis on the rock types,earthquakes and the relative crust movements.Then the two questions raised above are discussed.