Sustained and profound aridization process in north west China in Tertiary and Quaternary period and time of mankind history are discussed. The rain creased function of 3 set high mountain condensation systems in nort...Sustained and profound aridization process in north west China in Tertiary and Quaternary period and time of mankind history are discussed. The rain creased function of 3 set high mountain condensation systems in north west China is recognized once more. A sandstorm happened on 20th March 2002 in Alasan and Ejinaqi areas was very strong and arrived in Japan and Korea. For saving Alasan area from sandstorm a way of introducing sea water from Bohai to Alasan has been proposed. Four problems are replied in this paper. It is concluded that introducing sea water from Bohai to west China is the best way for sustainable development of west China.展开更多
To study the quantitative relationship between surface sedimentary diatoms and water depth,67 surface samples were collected for diatom analysis on eight profiles with water depth variation from the muddy intertidal z...To study the quantitative relationship between surface sedimentary diatoms and water depth,67 surface samples were collected for diatom analysis on eight profiles with water depth variation from the muddy intertidal zone to the shallow sea area in North-Central Bohai Bay,China.The results showed that the distribution of diatoms changed significantly in response to the change in water depth.Furthermore,the quantitative relationship between the distribution of dominant diatom species,their assemblages,and the water depth was established.The water depth optima for seven dominant species such as Cyclotella striata/stylorum,Paralia sulcata,and Coscinodiscus perforatus and the water depth indication range of seven diatom assemblages were obtained in the study area above the water depth(elevation)of-10 m.The quantitative relationship between surface sedimentary diatoms and water depth provides a proxy index for diatom-paleo-water depth reconstruction in the strata in Bohai Bay,China.展开更多
On the basis of perennial monthly mean temperature and salinity data, the classification of monthly water masses at the surface and the bottom in the Bohai Sea, the Huanghai Sea and the East China Sea, has been made b...On the basis of perennial monthly mean temperature and salinity data, the classification of monthly water masses at the surface and the bottom in the Bohai Sea, the Huanghai Sea and the East China Sea, has been made by using the method of fuzzy cluster from the modified characteristic of water masses in the shallow water area. In this paper, the basic features, growth and decline patterns of water masses in relation to fishing grounds in the whole shelves of the Bohai Sea, the Huanghai Sea and the East China Sea are discussed with emphasis.展开更多
Spatiotemporal information is crucial for cetacean research and conservation,particularly for wide-ranging and migratory species.Sperm whales(Physeter macrocephalus)are distributed worldwide in deep oceans;however,lit...Spatiotemporal information is crucial for cetacean research and conservation,particularly for wide-ranging and migratory species.Sperm whales(Physeter macrocephalus)are distributed worldwide in deep oceans;however,little is known about the species in the western margin of the Pacific Ocean.Here,we examined the available information related to the occurrence,distribution,and potential habitats of sperm whales in the waters off China.Historical whaling information(18th–20th century)indicates that sperm whales have been captured in the East China Sea(ECS)and South China Sea(SCS).Furthermore,sporadic strandings have been recorded since the 1910s,and more frequently from 1990 onwards.Since 1990,accidental sightings have been documented in the eastern ECS,northeastern and southern SCS,and their adjacent waters.More recently(2019–2022),field encounters have been reported in dedicated ship-based investigations in the Xisha and Nansha waters,providing robust evidence of the regular existence and potential residency of sperm whales in the northwestern and central areas of the SCS.Female nursery groups suggest that the Xisha waters might be an important nursing ground for sperm whales.Satellite tracking data from four adults showed that sperm whales in the SCS might display both fine-scale and long-distance movements.Taken together,it appears that sperm whales are currently active in the waters off China,and that deep waters(depth>200 m)in the ECS and SCS may provide the species with critical habitats.This review provides crucial baseline information on sperm whales in the waters off China,which may help to facilitate future research efforts and conservation initiatives for the species at national and cross-regional scales.More field investigations and other monitoring approaches including acoustic monitoring,biologging,photo-identification,and genetics are required to reveal the distribution,movement,and habitat use patterns of sperm whales in these waters.展开更多
文摘Sustained and profound aridization process in north west China in Tertiary and Quaternary period and time of mankind history are discussed. The rain creased function of 3 set high mountain condensation systems in north west China is recognized once more. A sandstorm happened on 20th March 2002 in Alasan and Ejinaqi areas was very strong and arrived in Japan and Korea. For saving Alasan area from sandstorm a way of introducing sea water from Bohai to Alasan has been proposed. Four problems are replied in this paper. It is concluded that introducing sea water from Bohai to west China is the best way for sustainable development of west China.
基金supported by the National Natural Science Foundation of China Youth Fund(41806109)the project of the China Geological Survey(DD20189506)。
文摘To study the quantitative relationship between surface sedimentary diatoms and water depth,67 surface samples were collected for diatom analysis on eight profiles with water depth variation from the muddy intertidal zone to the shallow sea area in North-Central Bohai Bay,China.The results showed that the distribution of diatoms changed significantly in response to the change in water depth.Furthermore,the quantitative relationship between the distribution of dominant diatom species,their assemblages,and the water depth was established.The water depth optima for seven dominant species such as Cyclotella striata/stylorum,Paralia sulcata,and Coscinodiscus perforatus and the water depth indication range of seven diatom assemblages were obtained in the study area above the water depth(elevation)of-10 m.The quantitative relationship between surface sedimentary diatoms and water depth provides a proxy index for diatom-paleo-water depth reconstruction in the strata in Bohai Bay,China.
基金This subject is aided financially by Chinese National Natural Science Foundation.
文摘On the basis of perennial monthly mean temperature and salinity data, the classification of monthly water masses at the surface and the bottom in the Bohai Sea, the Huanghai Sea and the East China Sea, has been made by using the method of fuzzy cluster from the modified characteristic of water masses in the shallow water area. In this paper, the basic features, growth and decline patterns of water masses in relation to fishing grounds in the whole shelves of the Bohai Sea, the Huanghai Sea and the East China Sea are discussed with emphasis.
基金This research was financially supported by the National Natural Science Foundation of China(Grant Nos.42225604 and 41422604)the“One Belt and One Road”Science and Technology Cooperation Special Program of the International Partnership Program of the Chinese Academy of Sciences(Grant No.183446KYSB20200016)+2 种基金the Key Deployment Project of the Center for Ocean Mega-Science of the Chinese Academy of Sciences(Grant No.COMS 2020Q15)the Zhilan Foundation(Grant No.2022010291B)the Small Grant in Aid of Research from the Society for Marine Mammalogy.
文摘Spatiotemporal information is crucial for cetacean research and conservation,particularly for wide-ranging and migratory species.Sperm whales(Physeter macrocephalus)are distributed worldwide in deep oceans;however,little is known about the species in the western margin of the Pacific Ocean.Here,we examined the available information related to the occurrence,distribution,and potential habitats of sperm whales in the waters off China.Historical whaling information(18th–20th century)indicates that sperm whales have been captured in the East China Sea(ECS)and South China Sea(SCS).Furthermore,sporadic strandings have been recorded since the 1910s,and more frequently from 1990 onwards.Since 1990,accidental sightings have been documented in the eastern ECS,northeastern and southern SCS,and their adjacent waters.More recently(2019–2022),field encounters have been reported in dedicated ship-based investigations in the Xisha and Nansha waters,providing robust evidence of the regular existence and potential residency of sperm whales in the northwestern and central areas of the SCS.Female nursery groups suggest that the Xisha waters might be an important nursing ground for sperm whales.Satellite tracking data from four adults showed that sperm whales in the SCS might display both fine-scale and long-distance movements.Taken together,it appears that sperm whales are currently active in the waters off China,and that deep waters(depth>200 m)in the ECS and SCS may provide the species with critical habitats.This review provides crucial baseline information on sperm whales in the waters off China,which may help to facilitate future research efforts and conservation initiatives for the species at national and cross-regional scales.More field investigations and other monitoring approaches including acoustic monitoring,biologging,photo-identification,and genetics are required to reveal the distribution,movement,and habitat use patterns of sperm whales in these waters.
