最新刊期
期 51 ， 2016
- 摘要：The regional geological setting, magmatic rock, vent fluid, hydrothermal plume, metalliferous sediment and polymetallic sulfide of the Okinawa trough and the Manus basin in the western Pacific have been studied. The Okinawa Trough has different tectonic and geophysical characteristics from the north to the south with crustal thickness decreases. The southern part of the trough shows variable gravity anomalies and linear magnetic anomalies, while the middle part has the highest heat flow value. The gravity anomalies in the Manus Basin show small variations while the magnetic anomalies show a pronounced E-W trend, and there exist linear magnetic anomalies near the seafloor-spreading center. Oceanic crust has already appeared in the Manus Basin, while the most part of the crust in the Okinawa Trough belongs to transitional crust, and oceanic crust probably appears in some grabens in the middle and southern part. The magma source of basalts from Okinawa trough and Manus basin are both formed by partial melting of mantle source and mixed with subduction composition. Intermediate-acid volcanic rocks with the same magma source of basalt, are products of crystallization differentiation of the basaltic magma. Compared to Manus basin volcanic rocks, volcanic rocks in the Okinawa trough are affected by different degree of crustal contamination. Vent fluid in Okinawa Trough was high temperature (up to 320℃), acid fluid and enriched in metal elements (e.g., Mn, Fe, Zn and Pb). Concentration of Zn2 , Cd2 , Pb2 and Cu2 in hydrothermal plume of Okinawa Trough was significantly higher than that in seawater. The Manus hydrothermal plume showed positive CH4, Mn, Al and δ3He anomalies and a negative pH anomaly. Compared with the vent fluid (220-276°C, pH=2.5-3.5) of PACMANUS hydrothermal field, the vent fluid of DESMOS hydrothermal field was lower temperature (≥88-120℃) and more acid (pH≤2.1). The lower values of δ34SH2S and δD implied the mixing of acid volatile component and magmatic fluid. The distribution and element concentrations of the metalliferous sediments from the Okinawa trough and the Manus basin are different, and the microbial community in the metalliferous sediments from the two areas aslo are different. The hydrothermal products were divided into four types: Zn-rich type, Ba-Pb-Zn type, Si-sulfide type and Si-sulfide-sulfate type in the Okinawa trough and the Manus basin. The Pb and Au concentrations of the polymetallic sulfides in the Manus basin are significantly lower than that in the Okinawa trough.关键词：Seafloor hydrothermal activity;magmatism;geological tectonics;Okinawa trough;Manus basin;back-arc basins
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发布时间：2023-07-07 - 摘要：The western Pacific warm pool (WPWP) is a region of highest oceanic temperature in the world, gathers huge heat, and plays a very important role in the climate system of the earth. This paper reviews progresses in the WPWP study during the past 30 years, including the mechanism underlying the formation of WPWP, multi-scale variability and corresponding physical causes, and progresses in observation and numerical simulation of the WPWP. The WPWP formation is thought to be a result of coupled atmospheric and oceanic processes in the context of modern topography. Strong variability of the WPWP can be detected on time scales from intra-seasonal to century time scales. Thereinto, the mechanism of the intra-seasonal variability includes variability in convection and sea surface heat flux associated with the Madden Julian Oscillation and ocean dynamics like oceanic waves. WPWP seasonality is mainly induced by the seasonal fluctuation in solar radiation. On an inter-annual time scale, the WPWP plays as a part of the El Ni?o-Southern Oscillation cycle and hence shows significant interannual variability. The Pacific Decadal Oscillation and Atlantic Multi-decadal Oscillation derive the inter-decadal variability of the WPWP, while on a century time scale, the WPWP shows an extending trend under the global warming. Systematical observation of the WPWP started from the application of ocean satellites, and then several observational projects including WCRP/TOGA, TAO/TRITON, TOGA-COARE, WOCE, Argo, SPICE and NPOCE were lunched successively, which have significantly promoted the WPWP study. But until the recent Coupled Model Intercomparison Project 5, most of the climate models failed to exclude the tropical SST bias, and simulation of the WPWP is not good enough yet, indicating a long way to better understand the WPWP dynamics and simulate the observed WPWP.关键词：western Pacific Ocean;warm pool;intra-seasonal variability;interannual variability;inter-decadal variability;tropical climate;ENSO
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发布时间：2023-07-07 - 摘要：Mesoscale eddy is ubiquitous in the world ocean. Its energy is an order of magnitude larger than the large-scale general ocean circulation playing an important role on the mass and energy transports, and global climate change. Due to lack of in-situ observations, eddies are mainly observed by utilizing satellite altimeter data. Its size, distribution, intensity, and mass and energy transports can also be estimated based on sea surface height data. However, the vertical structure of the mesoscale eddy can’t be captured by remote sensing, which led to large error for estimation of heat and energy transports by mesoscale eddy. Now we know little about the three-dimensional structure of the mesoscale eddy. To design an unmanned observation system to investigate the three-dimensional structure of the oceanic mesoscale eddy is necessary. This system will integrate and apply the advanced technology (such as unmanned ship platform, ocean automatic profile observation) to observe the three-dimensional structure and temporal-spatial variation of the mesoscale eddy, which will enhance understandingSof the material and energy transfer by the mesoscale eddy.关键词：unmanned surface vehicle;mesoscale eddy;ocean automatic profile observation
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发布时间：2023-07-07 - 摘要：Microbial influenced corrosion (MIC) in marine environment has been recognized as an important form of corrosion damage of marine engineering metal structures. Ships sailing in the ocean are not only affected by sea water corrosion, but also the various components of the ship will be affected by MIC. The serious MIC can cause the blockage of the pipeline, the failure of the components and the corrosion of the perforation, which not only affect the normal operation of the ship, but also seriously threaten the safety of the ship. This paper analyzes the sites and harm of MIC in ship, corrosion microbial community in different parts, MIC of ship materials, and applicability of different protection technology, and on this basis, put forward suggestions of marine microbial corrosion of research work.关键词：ship;microbial influenced corrosion;community structure;protection technology
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发布时间：2023-07-07 - 摘要：China is leading in the scale and production of mariculture worldwide. Seawater mollusks accounted for the majority of the total mariculture production in China. The molluscan mariculture industry has seen notable achievement in both technique R D and its application. This paper presents the advance in the aspects of breeding, ecological aquaculture, processing, and analyses the challenges arise from the industry, as well as the technique development trend. This review is aimed to provide with a reference in order to promote the sustainable development of molluscan mariculture.关键词：Molluscan Mariculture Techniques;Status;Trend
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发布时间：2023-07-07 - 摘要：Phytohormone is a kind of trace organic substance which is synthesized by plant. The main function of plant hormone lies in regulation to the growth, development and acclimation to the environments. Algae belong to the lower plant group and have similar kinds of phytohormones. Compared to the terrestrial plant, the content of phytohormone in the algae is less than that in higher plant. The investigation regarding to stress responding is always active no matter in higher plant or algae. As a stress responding hormone, the function of abscisic acid has been recognized widely. Here, we summarized the progress in the identification of ABA in algae, signal transduction mechanism of stress responding mediated by ABA, and evolution analysis based on the protein structure and translation patterns. Then, we suggested that the study regarding to the stress responding in algae should focused on the mechanisms in the intertidal algae.
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发布时间：2023-07-07 - 摘要：Marine-derived Streptomyces were the chief source of the bioactive marine natural products (MNPs) from marine microbial origin owing to their unique physiological and metabolic functions. According to statistic results for MNPs from 2010 to 2013, marine-derived Streptomyces attributed to 60% MNPs sourced from marine-derived actinobacteria. This paper reviews the sources, structures and bioactivities of the 547 new MNPs of Streptomyces origin in 40 years from 1976 to June 2016. These MNPs have diverse structures including alkaloids, polyketides, sterols and terpenoids, and so on. Nitrogen compounds are the major structural types making up 61% MNPs from Streptomyces. And 67% MNPs sourced from Streptomyces showed bioactivities such as cytotoxicity, antimicrobial activity, antimalaric and insecticidal activity.关键词：Marine-derived actinobacteria;Streptomyces sp.;marine natural products;sources;chemcal structures;bioactivities
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发布时间：2023-07-07 - 摘要：Echinoderms are restricted to the marine realm. They are widely distributed in all oceans and at all depths. Some play important roles in marine ecosystems. Echinoderms have a close relationship with the life of people due to its high economic value. Thus, it is urge to develop industries and to promote the studies of echinoderms. This paper summarized current situations and developing history of the study of echinoderms, and based on this, proposing solutions to varieties of future researches. These researches included biology and biodiversity, genetic and behavioral ecology, germplasm resources conversation and genetic improvement, a large scale breeding of health fingerlings, disease prevention and environmental control, facility and pattern of health aquaculture, production securities and quality control, industries development plan and market management et al. of echinoderms.关键词：echinoderms, theory, technology, research status, countermeasure of development
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发布时间：2023-07-07 - 摘要：The coastal waters of China Seas have observed many harmful algal blooms (HABs) caused by dinoflagellates such as Karenia mikimotoi, Prorocentrum donghaiense, Karlodinium veneficum, and Cochlodinium polykrikoides in the last decades and the associated catastrophic losses in shellfish aquaculture, fisheries and coastal ecosystems. In the view of addressing these problems, we revew the advancements in our knowledge about the characteristical life history and in particular, resting cysts, of dinoflagellates, because cysts have been shown to be associated with genetic recombination; resistance to unfavorable environmental conditions; protection from viruses, grazers, or parasite attacks；termination of algal blooms；seeding recurrent HABs; and geographic expansion of populations via ships'' ballast water, which, together, proves that resting cyst plays a central role in the ecology of HABs caused by dinoflagellates. We reviewed and discussed 1) the complexity of life cycles of dinoflagellates and controversies in the definitions and categorization of cysts, 2) the importance of cyst mapping in sediments in forcasting blooms and the associated complexity in the coupling between cyst abundance/distribution and the magnitude of blooms, 3) the complexity of factors affecting encystment and excystment, and 4) the recent progresses in genomic and transcriptomic studies on dinoflagellates in general and cyst-relevant molecular mechanisms in particular, and the possible vital roles of phytohormone in cyst-relevant processes. After a brief summary of the landmarks along cyst-relevant studies in the international HAB community and China, we end the revew by highlighting four research themes about the life history and cyst-relevant issues in China, namely, 1) more comprehensive investigations on an inventory of dinoflagellate cysts in the coastal sediments of China Seas and on the life histories of those important HAB species in China, 2) more intensive investigations on the species of cysts carried in those ships arriving ports of China and assessments of possible bioinvasion of alien HAB species via ships'' ballast water, 3) more field investigations on the processes in encystment, excystment, and coupling between life history events and bloom dynamics, and 4) investigations on the molecular processes relevant to encystment, dormancy, and excystment via a combined approach of -omics and physiology, as well as applications of different molecular probes for detecting HAB species and particular types of cells pertinent to bloom dynamics.关键词：Harmful algal blooms;Dinoflagellates;life history;Resting cysts;Encystment;Excystment;Ships'' ballast water;Sediment
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发布时间：2023-07-07 - 摘要：Rapid proliferation of toxic or noxious microalgae in the sea, which is termed as harmful algal bloom (HAB), can lead to serious impacts, such as fish kill, seafood contamination, tourism impairment and ecosystem degradation. Blooms of toxic algae are considered as a major group of HABs, leading to public health impacts due to the production of toxins. Toxic algal blooms receive increasing concern in China. Most of the toxic algal blooms in the coastal waters of China were caused by Alexandrium spp. producing paralytic shellfish toxins (PST) and Dinophysis spp. producing diarrhetic shellfish toxins (DST). Toxic species in genus Alexandrium distribute widely along the coast of China and intensive algal blooms of A. tamarense and/or A. catenella were found in the northern part of the Yellow Sea (YS), the sea area near the Changjiang River estuary in the East China Sea (ECS), and some bays in the South China Sea (SCS). Toxic Dinophysis spp. have been observed in all the China seas, and blooms of toxic Dinophysis spp. were reported in SCS and the northern part of YS, co-occurring with other microalgae. Proliferation of the toxic Alexandrium spp. and Dinophysis result in the contamination of shellfish products, and led to poisoning incidents sometimes. With the progress of high performance liquid chromatography (HPLC) and mass spectrometry (MS), more and more toxins were detected from the shellfish samples. The increasing awareness on toxic algal blooms and phycotoxins, as well as the rapid development of mariculture industry in China, require more studies on these issues.关键词：harmful algal bloom;toxic algae;phycotoxins;paralytic shellfish poisoning;diarrhetic shellfish poisoning
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发布时间：2023-07-07 - 摘要：The estuary is a salt-fresh water mixed sea area with much nutriment, which has high primary productivity and abundance of zooplanktons. All of these conditions above provide a lot of preies for larval and adult fishes. Advances in ecological studies on estuarine ichthyoplankton are reviewed on the domestic and abroad published papers. This paper includes estuarine ichthyoplankton ecological types, species composition, spatial and temporal distribution, and the effects of the environmental and man-made factors. The environmental factors involve in temperature, salt, turbudity, food, the predation of other animals,and El Nino and La Nina, et al, while the man-made factors consist in the construction of large projects, overfishing, and pollution.关键词：Estuary;Fish early-resources;Ichthyplankton;Affecting factors
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发布时间：2023-07-07 - 摘要：The microbial food web, which is comprised of phototrophic picoplankton, heterotrophic bacteria, virus and protozoa, is ubiquitous in marine waters. Members of the microbial food web may play important roles in the energy and nutrients cycle in the ocean. In microbial food webs, different types of interactions occur between microorganisms themselves and with microzooplankton. The functioning of the microbial food webs in different ecosystems has been well illustrated and explained. However, little has been known about the structure of the microbial food web since the first study in 2000 by Garrison et al. The abundances of different groups in the microbial food web are changing under different environments, but they mostly fall into a certain range: Ciliate 10 cell ml-1, nanoflagellates 103 cell ml-1, picoplankton 104 cell ml-1, cyanobacteria 104-5 cell ml-1, heterotrophic bacteria 106 cell ml-1, virus 107 particle ml-1. The optimum linear size ratio between predators and their optimal prey is 10:1, although this ratio is lower in field studies. For example, the ratio is 3:1 for nanoflagellates and 8:1 for ciliates. The ratio of picoplankton to nanoplankton abundance (Pico:Nano) is a scale-free index to study the microbial food web structure. The structure of the microbial food web depends, on one hand, on the type of environments and, on the other hand, on forcing factors exerting on these environments such as predation, phytoplankton and nutrient supplement. When studying the spatial variation of microbial food web structure, researchers usually use observation results of the abundance of microbial food web components from different water masses as an alternative plan. Regarding to the seasonal variation, the abundances and biomasses of microbial food web components are affected by the hydrological environment. Predation can affect the microbial food web structure through the following pathways: 1. Mesozooplankton feeding; 2. Mesozooplankton consumes microzooplankton and affecting lower trophic level through cascading predation effects; 3. Mesozooplankton could affect bacteria and other lower trophic level component by releasing dissolved organic matter and nutrients. Phytoplankton could release allelochemical matter and dissolved organic matter to change microbial food web dynamics. The concentration and variation of nutrients can have a direct or indirect impact on microbial food web structure.
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发布时间：2023-07-07 - 摘要：Marine benthos are important components in marine ecosystem, serving vital functions in energy flow and material cycling of marine bottom environment. During the past decades, studies on Marine Benthology in China have achieved major progress, but there are still some weaknesses in many research fields. In general, research activities on Marine Benthology in China are fragmented and deficient. It is in urgent need of establishing a specialized society to facilitate cooperation, exchange ideas, and integrate and share research resources. Based on the analysis of current status, we put forward proposals for future study and elaborate the function of the society in future development of Marine Benthology.关键词：benthos;Marine Benthology Branch;Ecology;Taxonomy;Biodiversity
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发布时间：2023-07-07 - 摘要：The vertical distributions of inorganic carbon parameters (pH, Total Alkalinity(TA), Dissolved Inorganic Carbon(DIC) and ratio of DIC/TAlk) and organic carbon parameters (Dissolved Organic Carbon(DOC) and Particulate Organic Carbon(POC)) in the main Kuroshio region near the eastern Taiwan Island were investigated during spring and fall, 2014. The major results were as follows: In spring 2014, waters in the main Kuroshio region near the eastern Taiwan Island could be divided into four types such as the Kuroshio Surface Water(KSW), the Kuroshio Tropical Water(KTW), the Kuroshio Intermediate Water(KIW) and the Kuroshio Deep Water(KDW), the boundaries separating each two adjacent water types located on 30~50m, 300~400m and 800~1000m, respectively. The average DIC, DOC and POC concentrations of Kuroshio waters in spring were 2078.1 μmol/kg，98.59 μmol/L and 1.62 μmol/L, respectively. Generally, TAlk, DIC and DIC/TAlk ratio increased and pH decreased with the increasing water depth in Kuroshio main stream; DOC and POC had high values above 200m water depth, then dropped back to relatively low and stable values below 200m. Carbon distribution in KSW was effected by multiple processes, such as primary production, bacterial decomposition, air-sea exchanges and terrestrial inputs; in KTW and KIW, the impact of phytoplankton production decreased, and the degradation of organic matters had important influence on the carbon system in this layer; in KIW and KDW, degradation of organic matters had almost finished, and the distribution of carbon was controlled by dissolution of CaCO3 and lateral transportation of shelf slope sediments. All parameters in Kuroshio Upwelling Water(KUW) were effected by upwelled deeper water, which maintained high CO2 and nutrients levels. In fall 2014, waters in the main Kuroshio region near the eastern Taiwan Island could still be divided into KSW, KTW, KIW and KDW, the boundaries between each two adjacent water types located on 75~100m, 300~500m and 800~1000m, respectively. The average DIC, DOC and POC concentrations of Kuroshio waters in fall were 2078.7 μmol/kg，92.36 μmol/L and 1.93 μmol/L, respectively. Generally, the distributions of all hydrographic and carbon parameters followed the same trends as they were in spring, and they were also influenced by similar processes as in spring. The values of carbon parameters in fall were slightly different from they were spring; the potential causes of these differences could be the lower phytoplankton production and lower bacterial production in fall. The DIC and DIC/TAlk levels in fall were similar with they were in spring, but the pH and TAlk in fall were higher, indicated a higher ratio of [CO32-] /[ HCO3-] in the main Kuroshio region near the eastern Taiwan Island in fall.
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发布时间：2023-07-07 - 摘要：Distributions of major elements, rare earth elements (REE) and heavy metals in the sediment core of the newly created wetlands of Yellow River Estuary were investigated and environmental significances of metal elements were discussed. The results showed that most metal elements had similar distribution patterns, which presented a low value zone at about 40 cm due to the numerous input of sediment from Yellow River. Grain size composition and organic matter content had significant influence on the distribution of metal elements. Specially, the distribution of Na2O was opposite to most other elements, reflecting the tidal erosion of the wetland. The concentration order of single REE in the sediment of Yellow River Estuary wetlands was consistent with the Yellow River sediment and Bohai sea sediment, but the total REE content was higher than the Yellow River sediment and lower than the Bohai sediment, indicating that the sediment in the Yellow River Estuary wetlands came from both Yellow River and Bohai Sea. The variation of (La/Yb)NASCcould reflect the change of material input. Besides, the heavy metals in the sediment of Yellow River Estuary wetlands enriched significantly under the influence of high contents of organic matter and clay particles.
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发布时间：2023-07-07 - 摘要：Based on macrobenthic samples collected from 13 stations around Zhangzi Island in northern Yellow Sea with 4 cruises in August, November of 2009 and February, June of 2010, the community structure and seasonal variation of macrobenthos from the research area were analyzed with dominant species analysis, Bray-Curtis similarity cluster analysis, MDS ordination analyses, and ABC curves. The results show that, 211 macrobenthic species in total were identified from the research area; five dominent species were found, i.e., Thyasira tokunagai (Mollusca), Goniada maculate (Polychaeta), Ophiopholis mirabilis (Echinodermata), Ampelisca bocki (Crustacea), and Ampelisca brevicornis (Crustacea), the compositions of dominant species were different among seasons; three macrobenthic sub-communities were determined: I--Ampelisca miharaensis-Ampelisca brevicornis-Goniada maculata sub-community located in northern research area, II--Ophiopholis mirabilis-Amphioplus japonicus sub-community located near Zhangzi Island, III--Thyasira tokunagai-Ophiura sarsii vadicola sub-community located in southern research area, the structure of the three sub-communities changed seasonally; the environment of the area was good, the community was disturbed slightly, the disturbance in summer was slighter than those of the other seasons.关键词：Zhangzi;Island, macrobenthos, community;structure, seasonal;variations, northern;Yellow Sea.
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发布时间：2023-07-07 - 摘要：Based on the macrobenthic samples collected by four seasonal cruises from August 2009 to June 2010 from 13 stations in northern Yellow Sea around Zhangzidao Island, the species number, abundance, biomass, biodiversity, and secondary production of macrobenthos from the research area were studied. The results show that 211 species were found, the mean abundance was 699.415 ind./m2, the mean biomass was 98.927 g/m2; the species numbers in different seasons were: spring (121)> autumn (118)> winter (89)> summer (87), the mean abundances in different seasons were spring (794.58 ind./m2)> autumn (766.92 ind./m2)> summer (674.62 ind./m2)> winter (561.54 ind./m2), the mean biomasses in different seasons were spring (180.271 g/m2)> summer (107.121 g/m2)>autumn (70.824 g/m2)> winter (37.493 g/m2); the indices of macrobenthic biodiversity were not much different in spring, summer and autumn, those in winter was the lowest; the mean Shannon-Wiener index was 2.976, the mean species richness index was 4.135 and the mean evenness index was 0.707; the seasonal variations of biomass and species number were obvious, they were higher in spring than in winter; the mean secondary production of macrobenthos was15.335g (AFDW) / (m2 ? a), and the mean P / B value was 1.239.关键词：Zhangzidao Island, macrobenthos, abundance, biomass, secondary production
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发布时间：2023-07-07 - 摘要：In this paper, the characteristic of the macrobenthic community in adjacent sea of Yangtze River estuary was studied, based on data collected from cruise in June(summer) of 2014. A total of 135 macrobenthic species were identified, of which, 66 species were Polychaeta, 33 were Crustacea, 14 were Echinodermata, 13 were Mollusca, and the remaining 9 species belong to other animal groups. The average abundance of the macrobenthos in adjacent sea of Yangtze River estuary was 122.2 ind/m2, and the average biomass was 7.8g/m2. The abundance, biomass, Shannon-Wiener index(H"), Margalef"s richness index(D), and Pielou index (J") were not significantly spatial difference. Eight macrobenthic assemblages were identified on the 20% similarity level, with low similarity among stations. The results of the ABC analysis show that with the rapid economical development of coastal zones and the impact of human activities, the stability of the benthonic community in adjacent sea of Yangtze River estuary is disturbedSslightly, therefore, long-term continuous monitoring is recommended and effective comprehensive management measures need to be explored to result in the healthy and sustainable development of the marine ecosystem in adjacent sea of Yangtze River estuary关键词：Yangtze River estuary;macrobenthos;diversity;community structure
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发布时间：2023-07-07 - 摘要：A new-version, cabin-style and trawl-resistant seabed based System is introduced. It can be deployed in regions with a water depth smaller than 200 m and used for continuous, long-term, multi-discipline observation.It is composed of the seabed platform, the floating body and the release device, and can carry multiple ocean monitoring sensors to carry out multidisciplinary observation. The method of deployment and recovery are also designed. Through in-situ experiments, this seabed based System shows advantages in auto measurement, concealment, and anti-trawling. It can be utilized for long-term, multi-discipline observations of marine environment.关键词：seabed based system;trawl-resistant;observation
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发布时间：2023-07-07 - 摘要：Conductivity-temperature-depth system (CTD) is one of the world’s most widely used instruments in physical oceanography. In this paper, oceanographic data acquired by three different types of CTD (37Coastal, 304Plus, and CTD48) were compared and analyzed. These CTDs were carried in the subsurface buoy placed in the Yellow Sea by Institute of Oceanology, Chinese Academy of Sciences in 2014. Results showed that the minimum pressure and temperature difference were both between 37Coastal and CTD48, while the highest correlation coefficient in salinity was between 37Coastal and 304Plus. The stability of the pressure, temperature and conductivity data acquired by those tree CTDs showed that pressure data of 37Coastal were the best of all. Three CTDs had similar stability on temperature data while the salinity data of 37Coastal were consistent with that of CTD48.关键词：Conductivity-temperature-depth;sensor;quality
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发布时间：2023-07-07 - 摘要：The ocean is a huge carbon reservoir which can slow global warming situation by absorbing atmospheric carbon dioxide. The ocean also contains a wealth of resources, but the excessive absorption of carbon dioxide lead to the decrease of seawater pH value, the effects of ocean acidification on the ocean cannot be ignored. Through bibliometric methods and statistical analysis from a macro perspective, this paper studied the overall development trend of ocean acidification, research power distribution and major research topics, analyzed the future trends, and put forward several research proposals combined with the existing problems, which aimed to provide some references for future ocean acidification research. The results show: ocean acidification research experienced four development periods including exploring, prototyping, rapid growth and steady growth; Australia, United States, Canada and the UK were the main research countries; National Oceanic and Atmospheric Administration, Woods Hole Oceanographic Institution, University of California, University of Queensland and James Cook University were the major research institutions. The process and causes of ocean acidification ,sensitivity organism and life processes influence, the ecosystem impacts and ecological effects, typical research on coral reefs and algae were the main research topics in this field. Future ocean acidification research should further expand the breadth and depth of research, improve research methods and techniques, and pay attention to the development of a comprehensive research program, carefully summarize qualitative and quantitative research results, consider various differences coupling factor and strengthen basic research and international cooperation.关键词：Ocean acidification;bibliometrics analysis;research trends;latest developments
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发布时间：2023-07-07 - 摘要：In this paper, using the Thomson Data Analyzer、Ucinet 、VOSviewer and excel software, we analyze publication output of trench research using bibliometric methods based on the SCIE and SSCI papers. Through revealing about trench research countries and institutions output and their cooperation , this paper summarizes trench research subject and overall development situation. The results in this paper might provide useful information for further research and strategies.关键词：trench;trend;bibliometric;SCI-E
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发布时间：2023-07-07 - 摘要：Seaweed flora was a sum of all the seaweed populations within definite time and space, with stable temperature, species composition and boundaries. There were two main types of seaweeds which were attached seaweeds and floating seaweeds. In flora study only the attached seaweeds were included, while there was no clear definition of floating seaweeds. Recent years the blooms of floating seaweeds had been a periodical phenomenon within some area in the world, which made it necessary to analyze the relationship between floating seaweed and seaweed flora. With the support from the molecular technology, it was available to carry out tracing and comparative research between attached and floating seaweeds. This paper discussed the relationship between floating seaweeds and seaweed flora. The two main results were: it was still hard to definite floating seaweed as a flora unit; meanwhile, floating seaweed could be a potential connection among different floras.关键词：seaweed flora;floating seaweeds;biogeography
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发布时间：2023-07-07
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