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738 results for “estuary”
Fig. 5. C in Distribution Of Trematodes Cryptokotyle (Trematoda, Heterophyidae), In Fish Of The Family Gobiidae In The Estuary Waters And The Black Sea In Southern Ukraine
Fig. 5. C. jejuna stained with alumcarmine. х400 magnification.
Effect of freshwater discharge from estuary dam on residual circulation in bifurcated channel
<p>Zip-files contain matlab m-files and raw data of transects data in Yeoungsan Rver estuary. The code was designed to analysis the changes from the raw data.</p> <p>During freshwater discharge.zip file contains data set with a freshwater impact from a estuary dam,</p> <p>Whereas during non-freshwater discharge.zip file contains data set without a freshwater impacts period.</p> <p> </p> <p> </p>
Catch-per-unit effort (CPUE) of the West African croaker Pseudotolithus elongatus in the Cross River Estuary, Nigeria
<p>Catch per unit effort, CPUE is a simple and effective statistical method employed by fisheries scientists to describe the catch status of a particular fishery. It can be presented as the total number of fish per hook, or time spent fishing, or trawler, or fisher. It is usually quantified in tons or kg</p>
Fig. 1 in A new tintinnid ciliate (Ciliophora: Spirotrichea) from Yangtze River Estuary, with notes on its habitat
Fig. 1. Sampling stations in the estuary of Yangtze River in 2005.
Bottom water mediated microplastics distribution in water and sediment in the Yangtze River Estuary and East China Sea
<p>This database included the original data of water parameters, microplastics abundance, microplastics size, shape, color and shape. </p>
St Twrogs, Severn Estuary, April 2017
Sitting on an outcrop of rock just beyond the Beachley peninsula lies a tidal island that is home to the remains of what was once a chapel. Old wives tales connect the chapel with a 5th Century anchoress who abandoned her father to take up the life of a religious hermit. The remains tell a slightly different story however and date the construction of the Chapel to around the early 13th Century. The story of its construction is still a mystery, records suggest that it is not linked to the Church but was built by one of the Marcher Lords, powerful men who upheld the rule of law on the controversial Welsh/England border. Whilst we may not know who built it, the connection with the established crossing point of the River Severn cannot be ignored and it is considered likely that you may have prayed for your safe passage across this treacherous route. You can find more about the Chapel and crossing the Severn in our [blog](https://www.citizan.org.uk/blog/2017/Apr/22/crossing-the-severn-through-the-ages/). Source: Objaverse 1.0 / Sketchfab
Data supplementing article "Tidal response to sea-level rise in different types of estuaries: the importance of length, bathymetry, and geometry" submitted to Geophysical Research Letters
<p>These data supplement the article "Tidal response to sea-level rise in different types of estuaries: the importance of length, bathymetry, and geometry". </p> <p>contact: Jiabi Du, jiabi.du@gmail.com</p> <p>Below are descriptions of the data files included here:</p> <p>1. ReadMe.txt</p> <p>- the description of each model configuration is listed in this file, inlcuding the estuarine geometry type, length, and bathymetry type. </p> <p>2. model grid and surface elevation output</p> <p>- In each directory named after the grid_name, a grid file with .gr3 format is included. <br> The .gr3 file contains two parts: the location of each node (first part), and the node number for each triangle grid (second part).</p> <p>- Two sub_directory name 'base' and 'slr' contains the time series of water level. </p> <p>3. MatlaScript ExtractWL</p> <p>- a function named "f_extract_wl.m" are used to extract the station output</p> <p> </p>
FIGURE 5 in Integrative systematics unveils the controversial identity of Engraulidae fishing stocks in a Neotropical estuary, northeast Brazil
FIGURE 5 | Canonical Variables Analysis discriminating for six pilombetas species.
Supplementary Data for 'Eastern Australian estuaries will transition to tidal flood regimes in coming decades' by Hague, Thran, Jakob and Jones.
<p>Supplementary data to support Hague et al. (2024) Coastal Futures paper, Eastern Australian estuaries will transition to tidal flood regimes in coming decades.</p> <p>column 'UTC_DT' provides datetime information in UTC in format YYYY-MM-DD hh:mm:ss</p> <p>column 'sea_lvl' provides quality assured water level as described in Hague et al. (2024)</p> <p>column 'sea_lvl'_pred' provides estimate of tidal contribution to water level as described in Hague et al. (2024)</p> <p> </p>
Combined data file for Jokinen et al. "Terrestrial organic matter input drives sedimentary trace metal sequestration in a human-impacted boreal estuary", Science of the Total Environment 717, 2020
<p>The datafile contains all the new raw data presented in the figures in the publication.</p>
Fig 3 in Fish distribution pattern and environmental influence in the Bandama River estuary (West Africa)
Fig 3: Correlations between fish species and environmental variables in the Bandama River estuary.
Fig 2 in Fish distribution pattern and environmental influence in the Bandama River estuary (West Africa)
Fig 2: Distribution of species by station in the PNA area according to their ecological categories.
Fig 1 in Fish distribution pattern and environmental influence in the Bandama River estuary (West Africa)
Fig 1: Map showing the different fish sampling points in the Bandama River estuary.
Data from: Environmental DNA metabarcoding reflects spatiotemporal patterns of fish community shifts in the Scheldt estuary
<p>Estuarine ecosystems face increasing anthropogenic pressures, necessitating effective monitoring methods to mitigate their impacts on the biodiversity they harbour. The use of environmental DNA (eDNA) based detection methods is increasingly recognized as a promising tool to complement other, potentially invasive monitoring techniques. Integrating such eDNA analyses into monitoring frameworks for large spatial ecosystems is still challenging and requires a deeper understanding of the scale and resolution at which eDNA patterns may offer insights in species presence and community composition space and time. The Scheldt estuary, characterized by its diverse habitats and complex currents, is one of the largest Western European tidal river systems. Until now, it remains challenging to obtain accurate information on fish communities living in and migrating through this large ecosystem, consequently confining our knowledge to specific locations. To explore the potential of eDNA-based monitoring, we simultaneously combine stow net fishing with eDNA metabarcoding, to assess the Scheldt estuary's fish communities in space and time. In total, we detected 71 fish species in the estuary using eDNA metabarcoding, partly overlapping with historic fish community data gathered at the different study locations and in contrast to only 42 species using stow net fishing during the same survey period. Community compositions found by both detection methods varied amongst sampling locations, driven by a clear correlation to the salinity gradient. Limited effects of sampling depth and tide were observed on the eDNA metabarcoding data, allowing a significant reduction of the eDNA sampling effort for future eDNA fish monitoring campaigns in this study system. Our results further demonstrate that seasonal shifts in fish species occurrence can be detected using eDNA metabarcoding. Combining eDNA metabarcoding and stow net fishing further enhances our understanding of this vital waterway's diverse fish populations, allowing a higher resolution and more efficient monitoring strategy.</p>
Figure 2 in Fish Diversity and Distribution in the Aksu River Estuary (Antalya- Turkey), in Relation to Environmental Variables
Figure 2. Temporal and spatial variations of biomass, Shannon and Evenness index.
Figure 3 in Fish Diversity and Distribution in the Aksu River Estuary (Antalya- Turkey), in Relation to Environmental Variables
Figure 3. Plot of site and species scores with 3 environmental variables in the first two CCA axes.
Fig. 1 in Total mercury in the fish Trichiurus lepturus from a tropical estuary in relation to length, weight, and season
Fig. 1. Location and details of the study area, Goiana Estuary at the Brazilian Northeast.
South East Queensland estuaries restoration prioritisation for fish data
<p>Data used to prioritise restoration actions in estuaries in southeast Queensland, Australia</p>
The dynamics of bi-directional exchange flows: implication for morphodynamic change within estuaries and sea straits
<p>Environmental and geophysical flows, including dense bottom gravity currents in the ocean and buoyancy-driven exchange flows in marginal seas,<br> are strongly controlled by topographic features.<br> These are known to exert significant influence on both internal mixing and secondary circulations generated by these flows.<br> In such cases, uni-directional or bi-directional exchange flows develop when horizontal density differences<br> and/or pressure gradients are present between adjacent water bodies connected by a submerged channel.<br> The flow dynamics of the dense lower layer depend primarily on the volumetric flux and channel cross-sectional shape,<br> while the stratified interfacial flow mixing characteristics, leading to fluid entrainment/detrainment,<br> are also dependent on the buoyancy flux and motion within the upper (lower density) water mass.<br> For submerged channels that are relatively wide compared to the internal Rossby radius of deformation,<br> Earth rotation effects introduce geostrophic adjustment of these internal fluid motions,<br> which can suppress turbulent mixing generated at the interface and result in the development of Ekman layers that induce secondary,<br> cross-channel circulations, even within straight channels.<br> Moreover, recent studies of dense, gravity currents generated in rotating and non-rotating systems,<br> respectively, indicated that the V-shaped channel topography had a strong influence on both flow distribution<br> and associated interfacial mixing characteristics along the channel.<br> However, such topographic controls on the interfacial mixing and secondary circulations generated by bi-directional exchange flows<br> are not yet fully understood and remain to be investigated thoroughly in the laboratory.<br> Also the effect of mobile bed for bi-directional exchange flows generated in deformable channels along with the physical interactions<br> between the lower dense water flow and the erodible bed sediments<br> will have a strong influence in (re-)shaping the overall channel bed topography (i.e. bed morphodynamics).<br> Consequently, the resulting temporal changes in cross-sectional channel bathymetry (i.e. through erosion and deposition processes)<br> would also be expected to have associated feedbacks on transverse asymmetries in the bi-directional exchange flow structure,<br> as well as on the internal flow stability.</p>
Data & Code for Sea-level rise induced threats depend on size of tide-influenced estuaries worldwide
<p>Data & Code for the article: "Data & Code for Sea-level rise induced threats depend on size of tide-influenced estuaries worldwide"</p> <p>- 1D Hydrodynamic model</p> <p>- Along-channel width profiles of the estuaries used in this study</p> <p>- Input data used for the tool and model in this study</p> <p>- Output data used for the figures</p>
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OpenNeuro
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