scholarly journals Checklist of marine diatoms from the Turkish coastal waters with updated nomenclature

2021 ◽  
Vol 4 (1) ◽  
pp. 88-115
Author(s):  
Aydın Kaleli ◽  
Reyhan Akçaalan
Keyword(s):  
Coastal Waters ◽  
Benthic Diatom ◽  
Marine Phytoplankton ◽  
Marine Diatom ◽  
Marine Diatoms ◽  
The Past ◽  
Detailed List

Marine diatom research in the coastal waters of Turkey started nearly two centuries ago. In the last decades, in-creasing numbers of contri-butions extended the knowledge of the marine phytoplankton. While sev-eral studies dedicated to planktonic forms and the checklists published con-cerning on the phytoplank-ton, relatively low numbers of benthic diatom studies were performed. Therefore, this is the first detailed list of the marine diatoms in-cluding both planktonic and benthic forms in Turkish coasts. This paper brings up the checklist of the past re-search referring to the au-thors in the last two centu-ries within the scope of the latest nomenclature. A total of 767 taxa (species, varie-ties and forms) belonging to 183 genera were listed. This study focussed into the study areas according to the reviewed literature and showed that many areas are yet to be investigated.

Modelling and simulation of ship collisions in port and coastal waters

2021 ◽  
pp. 147509022198918
Author(s):  
Chien-Chang Chou
Keyword(s):  
Coastal Waters ◽  
Maritime Transportation ◽  
Critical Factors ◽  
Ship Maneuvering ◽  
Collision Model ◽  
The Past ◽  
Sea Current ◽  
Ship Collision ◽  
Comparison Of The Results ◽  
Collision Models

Navigational safety is an important issue in maritime transportation. The most frequent type of maritime accident in the port and coastal waters is the ship collision. Although some ship collision models have been developed in the past, few have taken account of wind and sea current effects. However, wind and sea current are critical factors in ship maneuvering. Therefore, based on the previous collision model without wind and sea current effects, this study further develops a ship collision model with wind and sea current effects. Finally, a comparison of the results for the proposed collision model in this study and the ship maneuvering simulator is shown to illustrate the effectiveness of the proposed mathematical model in this paper, followed by the conclusions and suggestions given to navigators, port managers, and governmental maritime departments to improve navigational safety in port and coastal waters.

Ruling out Change: Institutional Impediments to Transfer of Technology in Ship Building and Design in the Far East

Itinerario ◽  
1995 ◽  
Vol 19 (3) ◽  
pp. 142-152
Author(s):  
Bao Leshi
Keyword(s):  
Coastal Waters ◽  
Building Materials ◽  
Far East ◽  
Local Conditions ◽  
Ship Building ◽  
The Past ◽  
Transfer Of Technology ◽  
Construction Techniques ◽  
Different Types ◽  
Technological Tradition

In the Chinese technological tradition, no sector, apart from that of agriculture, is as rich in original ideas as naval architecture. Over the past three millennia, hundreds of different types of craft have been developed for use on China's shallow lakes, on its fast flowing rivers and along its often stormy coastal waters. Each type was developed for specific use as a means of transportation, and would seem to represent the ultimate answer to the challenges posed by local conditions. Ultimate answer, that is, within the limitations of the traditional building materials with which these boats were constructed and fitted out. Nor was ingenuity confined to construction techniques.

scholarly journals Intraspecific variation in metal tolerance modulate competition between two marine diatoms

2021 ◽  
Author(s):  
Björn Andersson ◽  
Anna Godhe ◽  
Helena L. Filipsson ◽  
Linda Zetterholm ◽  
Lars Edler ◽  
...  
Keyword(s):  
Competitive Advantage ◽  
Dose Response ◽  
Metal Tolerance ◽  
Marine Phytoplankton ◽  
Strain Selection ◽  
Control Treatment ◽  
Toxic Stress ◽  
Marine Diatoms ◽  
Toxic Dose ◽  
Multiple Strains

AbstractDespite widespread metal pollution of coastal ecosystems, little is known of its effect on marine phytoplankton. We designed a co-cultivation experiment to test if toxic dose–response relationships can be used to predict the competitive outcome of two species under metal stress. Specifically, we took into account intraspecific strain variation and selection. We used 72 h dose–response relationships to model how silver (Ag), cadmium (Cd), and copper (Cu) affect both intraspecific strain selection and competition between taxa in two marine diatoms (Skeletonema marinoi and Thalassiosira baltica). The models were validated against 10-day co-culture experiments, using four strains per species. In the control treatment, we could predict the outcome using strain-specific growth rates, suggesting low levels of competitive interactions between the species. Our models correctly predicted which species would gain a competitive advantage under toxic stress. However, the absolute inhibition levels were confounded by the development of chronic toxic stress, resulting in a higher long-term inhibition by Cd and Cu. We failed to detect species differences in average Cu tolerance, but the model accounting for strain selection accurately predicted a competitive advantage for T. baltica. Our findings demonstrate the importance of incorporating multiple strains when determining traits and when performing microbial competition experiments.

Advances in reconstructive options of nerve injuries in the hand

2012 ◽  
Vol 153 (45) ◽  
pp. 1767-1778 ◽  
Author(s):  
Vilmos Bíró
Keyword(s):  
Peripheral Nerves ◽  
Common Property ◽  
Review Of Literature ◽  
Nerve Injuries ◽  
Important Data ◽  
The Past ◽  
Reconstructive Operations ◽  
Detailed List ◽  
High Level ◽  
Reconstructive Techniques

The author summarizes the most important data about the development of reconstructive techniques of nerve injuries in the hand based on literature references and the author’s own experience in the past decades. A new bulk of knowledge turned into a common property related to the micro- and macroanatomic structure of peripheral nerves, the process of nerve regeneration, and the technical conditions of nerve reconstructive operations. This knowledge is a prerequisite for hand surgeons to perform their nerve reconstructive operations on a contemporary high level with an optimal result. After a critical review of literature data, the author reports his own experience and sketches the coming possible roads. A detailed list of references is also provided for those who are interested in the field. Orv. Hetil., 2012, 153, 1767–1778.

Marine diatoms from Buenos Aires coastal waters (República Argentina). I. Thalassiosiraceae

Nova Hedwigia ◽  
2001 ◽  
Vol 73 (1-2) ◽  
pp. 199-228
Author(s):  
Eugenia A. Sar ◽  
Inés Sunesen ◽  
Cecilia Castaños
Keyword(s):  
Coastal Waters ◽  
Buenos Aires ◽  
Marine Diatoms

The possibility of using marine diatom-infecting viral promoters for the engineering of marine diatoms

Plant Science ◽  
2020 ◽  
Vol 296 ◽  
pp. 110475
Author(s):  
Takashi Kadono ◽  
Yuji Tomaru ◽  
Kengo Suzuki ◽  
Koji Yamada ◽  
Masao Adachi
Keyword(s):  
Marine Diatom ◽  
Marine Diatoms ◽  
Viral Promoters

scholarly journals NADPH-dependent extracellular superoxide production is vital to photophysiology in the marine diatom Thalassiosira oceanica

2019 ◽  
Vol 116 (33) ◽  
pp. 16448-16453 ◽  
Author(s):  
Julia M. Diaz ◽  
Sydney Plummer ◽  
Colleen M. Hansel ◽  
Peter F. Andeer ◽  
Mak A. Saito ◽  
...  
Keyword(s):  
Sequence Similarity ◽  
Cell Types ◽  
Redox Balance ◽  
Superoxide Production ◽  
Marine Phytoplankton ◽  
Marine Diatom ◽  
High Sequence Similarity ◽  
Whole Cells ◽  
Wide Range ◽  
Diphenylene Iodonium

Reactive oxygen species (ROS) like superoxide drive rapid transformations of carbon and metals in aquatic systems and play dynamic roles in biological health, signaling, and defense across a diversity of cell types. In phytoplankton, however, the ecophysiological role(s) of extracellular superoxide production has remained elusive. Here, the mechanism and function of extracellular superoxide production by the marine diatom Thalassiosira oceanica are described. Extracellular superoxide production in T. oceanica exudates was coupled to the oxidation of NADPH. A putative NADPH-oxidizing flavoenzyme with predicted transmembrane domains and high sequence similarity to glutathione reductase (GR) was implicated in this process. GR was also linked to extracellular superoxide production by whole cells via quenching by the flavoenzyme inhibitor diphenylene iodonium (DPI) and oxidized glutathione, the preferred electron acceptor of GR. Extracellular superoxide production followed a typical photosynthesis-irradiance curve and increased by 30% above the saturation irradiance of photosynthesis, while DPI significantly impaired the efficiency of photosystem II under a wide range of light levels. Together, these results suggest that extracellular superoxide production is a byproduct of a transplasma membrane electron transport system that serves to balance the cellular redox state through the recycling of photosynthetic NADPH. This photoprotective function may be widespread, consistent with the presence of putative homologs to T. oceanica GR in other representative marine phytoplankton and ocean metagenomes. Given predicted climate-driven shifts in global surface ocean light regimes and phytoplankton community-level photoacclimation, these results provide implications for future ocean redox balance, ecological functioning, and coupled biogeochemical transformations of carbon and metals.

Cenozoic Marine Diatom Biostratigraphy and Applications to Paleoclimatology and Paleoceanography

1995 ◽  
Vol 8 ◽  
pp. 107-118 ◽  
Author(s):  
John A. Barron ◽  
Jack G. Baldauf
Keyword(s):  
Marine Diatom ◽  
Paleoenvironmental Reconstruction ◽  
Photic Zone ◽  
Marine Diatoms ◽  
Sedimentary Sequences ◽  
Marine Food Chain ◽  
Current State ◽  
Aqueous Environments ◽  
Biostratigraphic Correlation ◽  
Marine Food

Diatoms, golden brown algae, are present in most aqueous environments. Within the marine environment marine diatoms occupy the photic zone and represent the lowest level of the marine food chain. Diatoms are either planktonic or benthic and possess an external siliceous skeleton or frustule, that is boxlike in structure. The size of diatom frustules ranges from less than 1 μm to more than 1,000 μm, but most frustules range in size from 10 to 100 μm. Diatoms are present in the geological record from at least the Cretaceous (Harwood and Nikolaev, this volume) and have numerous advantages for biostratigraphic correlation and paleoenvironmental reconstruction of marine sedimentary sequences. This chapter summarizes the current state of marine diatom biostratigraphy for the Cenozoic and provides examples of how marine diatoms are used in paleoenvironmental reconstructions. No attempt is made to illustrate the various diatom taxa discussed; the reader is referred to published references such as the syntheses of Fenner (1985) and Barron (1985).

The marine planktonic dinoflagellate Tripos: 60 years of species-level distributions in Australian waters

2020 ◽  
Author(s):  
Gustaaf Hallegraeff ◽  
Ruth Eriksen ◽  
Claire Davies ◽  
Anita Slotwinski ◽  
Felicity McEnnulty ◽  
...  
Keyword(s):  
Coastal Waters ◽  
Arabian Sea ◽  
Light And Electron Microscopy ◽  
Species Level ◽  
Freshwater Species ◽  
Careful Attention ◽  
Tropical Waters ◽  
Australian Species ◽  
The Past ◽  
Water Species

We reviewed 15572 Australian species-level records of the marine planktonic dinoflagellate Tripos Bory (formerly Ceratium Schrank, a genus now restricted to freshwater species). The genus is represented by over 50 species and numerous varieties and forms in Australian tropical, subtropical and temperate marine waters and the Southern Ocean. There exists considerable plasticity in the morphology of many species, which has confounded species delimitations and created uncertainty around their spatial distributions. We newly illustrate by light and electron microscopy the rarely reported Tripos hundhausenii (Schröd.) Hallegr. & Huisman comb. nov. first described from the Arabian Sea, but increasingly being observed in Sydney coastal waters. A large number of Tripos species are widely distributed in temperate, subtropical and tropical waters and their distributions have remained remarkably stable in Australian waters over the past 60–80 years. By contrast, we identified a narrow group of warm-water species, including T. belone (Cleve) F.Gómez, T. cephalotus (Lemmerm.) F.Gómez, T. dens (Ostenf. & E.J.Schmidt) F.Gómez, T. digitatus (F.Schütt) F.Gómez, T. gravidus (Gourret) F.Gómez, T. incisus (G.Karst.) F.Gómez, T. paradoxides (Cleve) F.Gómez and T. praelongus (Lemmerm.) F.Gómez, that are commonly encountered off Sydney, rarely found down to Eden and Batemans Bay or Bass Strait, but occasionally occur as far south as King Island and Maria Island, Tasmania. These rare tropical Tripos species are carried southward by the East Australian and Leeuwin Currents and deserve careful attention in monitoring for future range expansions, changes in seasonality or upwelling or incursion of deep tropical waters.

scholarly journals Spatial and temporal trends in order richness of marine phytoplankton as a tracer for the exchange zone between coastal and open waters

2016 ◽  
Vol 97 (3) ◽  
pp. 477-489 ◽  
Author(s):  
A.S. Jung ◽  
R. Bijkerk ◽  
H.W. Van Der Veer ◽  
C.J.M. Philippart
Keyword(s):  
Particulate Matter ◽  
North Sea ◽  
Coastal Waters ◽  
Wadden Sea ◽  
Temporal Trends ◽  
Marine Phytoplankton ◽  
Environmental Drivers ◽  
Suspended Particulate ◽  
Phytoplankton Communities ◽  
Spatial And Temporal Trends

Quantifying exchange of particulate matter between coastal and open waters is an important and often unresolved issue. Here, we apply phytoplankton order richness as an innovative marine tracer to identify the geographic position of a coastal exchange zone in the SE North Sea, including its variability in time and space. Previous observations on dynamics of suspended particulate matter accumulation resulted in a hypothesized boundary between coastal waters (including the Wadden Sea) and open North Sea waters, the so-called ‘line-of-no-return’. Our study along two transects (Terschelling, Noordwijk) in the Dutch coastal zone showed seasonality patterns in phytoplankton order richness, both for diatoms and flagellates. The coastal Wadden Sea was found to be clearly different from the open North Sea, implying that seasonality in Wadden Sea phytoplankton is at least partly driven by local environmental conditions. Seasonality in flagellates was found to be more uniform than seasonality in diatoms. Stations in the coastal North Sea to a distance of 10 km (Terschelling) to 20 km (Noordwijk) from the shore appeared to be at the inside of the ‘line-of-no-return’. Our findings indicate that this approach is a useful aid in exploring mixing of particulate matter between coastal and open waters and to study the responses of phytoplankton communities to environmental drivers.

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