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1.
Wei Shouqing 《海洋学报(英文版)》1991,10(3):480-480
A study was made on the polyculture of the red algae Gracilaria tenuistipitata Chang et Xia f. Liui Zhang et Xia, f. nov. , the shrimp Penaeus penicillatus Alcock and the mud crab Scylla serrata (Forskal) . The photosynthesis of the algae produces the oxygen on which the shrimp and the crab breathe. The algae are the reproductive place of the organism for the food of the shrimp and the carb, also is the shelter of the shrimp and the crab. The shrimp and the crab regard the algae as the vegetable 相似文献
2.
《中国海洋工程》1993,(4)
The Seminar on the Development of Port and Coast in the Mainland and Taiwan was heldfrom October 15th to 20th, 1993 in Hohai University, Nanjing, China, under the sponsorship ofHohai University and National Cheng Kung University, Tainan, and under the co-sponsorshipof Nanjing Hydraulic Research Institute and Jiangsu Society of the Mainland and Taiwan Rela-tionship. The aim of the Seminar is to strength the academic exchanges in the fields of port andcoastal engineering, to promote cooperation in science and technology, to benefit the develop-ment of construction as well as science, technology and education in port and coastal engi-neering in the Mainland and Taiwan of China. The main topics covered are in four aspects: 相似文献
3.
INTRODUCTIONInordertostudythemarinesedimentationoftheChukchiSeaandBeringSeaandgathertheinformationofpaleoceanographyandpaleoenvironment,theFirstChineseNationalArcticResearchExpeditionTeamcollectedbenthonicmolluscansamplesintheChukchiSea ,BeaufortSeaandBeringSeafromJuly 1sttoSeptember 9th ,1 999byicebreakerXuelong .ItwasnotonlythefirstsamplingthatChinesescientistscollectedmolluscaremainsinabove mentionedar eas,butalsooneofinvestigationsinasinglecruisewithhighersamplingrateandalotofb… 相似文献
4.
In the seawater and sediments of the ocean, there exist huge quantities of bacteria whose living activities cause various chemical reaction processes. It is demonstrated that microorganisms play a fundamental role on chemical changes of the sediments and diageneses. Over the last twenty years, great interest has been increased about the role of deep-sea bacteria in the ferromanganese sedimentary process. Much work has been done on this aspect in the Atlantic Ocean, the Baltic Sea and the Pacific O- 相似文献
5.
The paper focuses on the characteristics of faulting and magmatism of the Okinawa Trough and the relation between them.En-echelon grabens are ranked oblique to the continental shelf edge uplift,and the Longwang uplift,the rifting block ridge in the northern segment and the“Mianhua uplift”in the southern segment have possibly preserved characteristics of volcanism and magmatism occurring with those rifting phases.The clockwise rotation of the southern Ryukyu Islands,driven by collision between Luzonand Taiwan,has played a key role in the crustal oceanization,enhancing the crustal extension of the southern segment and inducing volcanic magmatism in those grabens,among which the Yaeyama graben is a typical example of the presence of oceanic crust.Faulting and magmatism were mainly migrating towards the island are asymmetrically.The crustal oceanization of the Okinawa Trough is difficultly interpreted by the linear magnetic anomaly model,which is fit for the symmetric spreading of the mid-oceanic ridges. 相似文献
6.
Diatoms are major primary producers of microbial biomass in the Antarctica. They are found in the water and sea ice. The distribution, abundance of the ice diatoms and their relation to the environmental factors inside and outside the ice have been studied for its special role in the Antarctic Ocean ecology. In this paper we describe the abundance, distribution and composition of diatom assemblages in 相似文献
7.
Demidov A. B. Gagarin V. I. Artemiev V. A. Arashkevich E. G. Makkaveev P. N. Shchuka S. A. Khrapko A. N. Grigoriev A. V. Vorobieva O. V. Konyukhov I. V. Fedorov A. V. 《Oceanology》2020,60(2):189-204
Oceanology - The vertical distribution of phytoplankton primary production (PP) and chlorophyll a (Chl) was studied based on the data carried out in August–September 2015, 2017, and 2018. The... 相似文献
8.
《Oceanologica Acta》2002,25(5):219-226
The Mid-Atlantic Ridge is the target of an emerging international ecosystem study under the Census of marine life programme. This pilot project shall gather new knowledge on biodiversity, distribution patterns, and ecological processes, and the overriding aim is “to describe and understand the patterns of distribution, abundance and trophic relationships of the organisms inhabiting the mid-oceanic North Atlantic, and identify and model ecological processes that cause variability in these patterns”. The project will focus on pelagic, benthopelagic and epibenthic macrofauna, and analyse distribution and abundance patterns in relation to the abiotic and biotic environment, as well as trophic relationships and life history strategies. Fish, crustaceans, cephalopods and gelatinous plankton and nekton have the highest priority in the study. A major challenge of the project is to overcome observation difficulties at large depths and in rugged terrain. A central aim is thus to utilise modern remote sensing technology (acoustics, optics) using advanced instrument carriers (e.g. towed vehicles, ROVs, AUVs, etc.). The project will be carried out as a multi-ship operation in 2003–2005, and the ongoing planning is a collaborative effort involving many nations around the North Atlantic. The project will work on the Mid-Atlantic Ridge and in adjacent waters from the Azores to Iceland, both by surveying large areas by acoustics and mid-water trawling, and by focusing on three selected sub-areas for intensive sampling and observation by traditional and novel methods and technology. Overlapping with the field seasons, the period 2004–2008 will be an analytical phase, also including submission of data to OBIS. 相似文献
9.
The fish eggs, larvae and juveniles were collected during 25 cruises from April to No-vember 1980 and 1981 respectively. They were represented by 40 species, 36 genera, 19families and 9 orders. According to their habit, the fish eggs, larvae and juveniles couldbe referred to three types: (1) shallow sea and estuary type; (2) migration type of outersea; (3) fresh water type. The shallow sea and estuary species were 29 in number, occu-pying 72.5% of the total; the migration species were 3 in number, occupying 7.5% of thetotal; the fresh water species were 8 in number occupying 20% of the total. 相似文献
10.
1Introduction Heterotrophicmicrobesarenowconsideredtobe significantcomponentsofthestructureandfunctionof marinepelagicecosystems.Heterotrophicbacteriacon- stituteamajorpoolofbiomassinopenecosystem (WilhelmandSuttle,1999).Theyconsumealargepor- tionofprimaryproduction(Li,1998;Sherryetal., 2002;Lietal.,2004),andtheymineralizemostofthe dissolvedorganiccarbonthattheyconsume(Azamet al.,1983;Richetal.,1997;Azam,1998).Therolesof planktonicprotists,suchasheterotrophicflagellates andciliates,inmicro… 相似文献
11.
N. P. Kurian K. Rajith B. T. Murali Krishnan N. Nirupama T. S. Murty 《Marine Geodesy》2013,36(4):277-281
During the Indian Ocean tsunami of December 26, 2004, specific observations were made by our survey team about the arrival times of several tsunami waves, their amplitudes, maximum extent of horizontal inundation on land and initial withdrawal of the ocean. Here the observations on the horizontal inundation and initial withdrawal are presented and briefly discussed. 相似文献
12.
Barremian–Aptian organic-rich shales from Abu Gabra Formation in the Muglad Basin were analysed using geochemical and petrographic analyses. These analyses were used to define the origin, type of organic matters and the influencing factors of diagenesis, including organic matter input and preservation, and their relation to paleoenvironmental and paleoclimate conditions. The bulk geochemical characteristics indicated that the organic-rich shales were deposited in a lacustrine environment with seawater influence under suboxic conditions. Their pyrolysis hydrogen index (HI) data provide evidence for a major contribution by Type I/II kerogen with HI values of >400 mg HC/g TOC and a minor Type II/III contribution with HI values <400 mg HC/g TOC. This is confirmed by kerogen microscopy, whereby the kerogen is characterized by large amounts of structured algae (Botryococcus) and structureless (amorphous) with a minor terrigenous organic matter input. An enhanced biological productivity within the photic zone of the water columns is also detected. The increased biological productivity in the organic-rich shales may be related to enhanced semi-arid/humid to humid-warm climate conditions. Therefore, a high bio-productivity in combination with good organic matter preservation favoured by enhanced algae sizes are suggested as the OM enrichment mechanisms within the studied basin. 相似文献
13.
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. 相似文献
14.
朱仁华 《海洋学报(英文版)》1984,3(4):601-602
In crude enzymes extracted from the Lunella cornata coreensis there are two algi- nases with different functions. One of the alginases can cleave the middle bond of the algin molecular chains in the reactive condition of 30 μM pH 7.5 Tris-HCl buffer and 50 μM KCl per ml of reactive mixture Ⅰ. This enzyme can readily decrease the viscosity, but the reducing groups increase slowly in the algin reactive mixture Ⅰ. Thus, it is defined as alginase Ⅰ. 相似文献
15.
The community composition,abundance and culturablity of heterotrophic bacterioplankton in the Dapeng Bay of the South China Sea were investigated by morphological method,bacterial cultivation and biochemical methods over an annual cycle.Aeromonas and Pseudomonas were the predominant genera among the Gram-negative bacteria.The bacterioplankton abundance fluctuated from 2.07×10 8 to 2.44×10 9 cells/dm 3 ,and culturable bacteria abundance ranged between 0.1×10 6 and 16.07×10 6 CFU/dm 3 .The Culturablity of heterotrophic bacteria ranged between 0.01% and 1.31%.The relationship between bacterial culturablity and the environmental factors was also studied in different sites of the Dapeng Bay.Throughout the bay,a significantly positive relationship was evidenced between bacterial culturability and temperature,meanswhile bacterial culturability was significantly inversely related with salinity.The positive relationship was shown at the central bay while a negative relationship was observed at the bay mouth and there was no significant correlation at top bay between bacterial culturablity and chlorophyll a of sea water.A positive relationship was found between culturability and DIN all the bay,but DIP showed a significantly negative relationship with bacterial culturability only at the mouth of the bay. 相似文献
16.
Characteristics and evolution of the Kuroshio frontal eddies and warm filaments are analyzed according to two series of satellite images (March 5 to 7, 1986 and April 14 to 16, 1988). The results show that the frontal eddies in the East China Sea are generated at the shelf break and move along the continental slope at a speed of 15 cm/s with the Kuroshio. The frontal eddies occur about every 10 d and evolve to be warm filaments a few hundred km in length and 30-40 km in width in the area west of the Yaku-shima. Meanwhile, the existence of the warm filament was also found in the area by analysing the hydrographic data in the area west of Kyushu during May 24-June 5, 1988.The Kuroshio warm filaments move westward opposite to the Kuroshio and then turn northward at the shelf break and become the main source of the warm water of the Tsushima Warm Current. A simple dynamic explanation for the process is presented in this paper. 相似文献
17.
18.
Annual and interannual variations of sea-level anomaly (SLA) in the Bay of Bengal and the Andaman Sea are investigated using altimeter-derived SLA data from 1993 to 2003. It is found that the SLA annual variation in the study area can be divided into three phases with distinctive patterns. During the southwest monsoon (May-September), positive SLA presents in the equatorial region and extends northward along the eastern boundary of the bay, and the SLA distribution in the interior bay appears to be high in the east and low in the west with two cyclonic cells developing in the north and south of the western bay respectively, between which an anticyclonic cell exists. During the early northeast monsoon (October-December), the whole bay is dominated by a large cyclonic cell with the pattern of high SLA in the east and low in the west still retained, and the SLA distribution outside the bay is changed in response to the reversal of the Indian Monsoon Current (IMC) in November. During the late northeast monsoon (January-April), a large anticyclonic cell of SLA develops in the bay with negative SLA prevailing in the equatorial region and extending northward along the eastern boundary of bay. Therefore, the SLA distribution in the interior bay reverses to be high in the west and low in the east. It is suggested that the SLA annual variation in the bay is primarily driven by the local wind stress curl, involving Sverdrup balance while the abrupt SLA variation during the peak of northeast monsoon may be partly caused by the semiannual fluctuation of wind in the equatorial region. This fast adjustment in the interior bay is induced by the upwelling coastal Kelvin wave excited by the decay of Wyrtki jet during December through January. Besides the annual variation, in the bay, there are obvious SLA fluctuations with the periods of 2 and 3~7 a, which are driven by the interannual variability of large-scale wind field in the equatorial region. The coastal Kelvin wave also provides an important link for the SLA interannual variation between the equatorial region and the interior bay. It is found that the El Nio-Southern Oscillation (ENSO)-induced influence on the SLA interannual variation in the interior bay is stronger than the Indian Ocean dipole (IOD) with the associated pattern of low sea-level presenting along the periphery of the bay and high sea-level in the northeast of Sri Lanka. 相似文献
19.
- Abundance of total bacteria, heterotrophic bacteria, coliform and oil degradable bacteria and their relations with salinity and suspended matter in the frontal waters in the Hangzhou Bay are described. The results obtained show that the highest abundances of total bacteria , heterotrophic bacteria are encountered around the front and near the northern shore of the Hangzhou Bay, where a positive correlation ( r =0. 70) between the total bacteria abundance and the total suspended matter (TSM) is persent. Moreover,the abundance of oil degradable bacteria being an indicator of oil pollution, is also high in that region. 相似文献
20.
M. S. El-Deek 《海洋学报(英文版)》1995,14(3):405-412
ＣｈｅｍｉｃａｌｆｏｒｍｓｏｆｃｏｐｐｅｒａｎｄｚｉｎｃｉｎｔｈｅｓｕｒｆｉｃｉａｌｓｅｄｉｍｅｎｔｓｏｆＢｏｒｏｌｌｏｓＬａｋｅ，Ｅｇｙｐｔ￥Ｍ．Ｓ．ＥＩ－Ｄｅｅｋ（ＮａｔｉｏｎａｌＩｎｓｔｉｔｕｔｅＯｆＯｃｅａｎｏｇｒａｐｈｙａｎｄＦｉｓｈｅｒｉ... 相似文献