Taxonomic identification matters: Comment on “Exploring the impact of snow vole (Chionomys nivalis) burrowing activity in the Făgăraș Mountains, Southern Carpathians (Romania): Geomorphic characteristics and sediment budget”

CATENA ◽  
2019 ◽  
Vol 183 ◽  
pp. 104194 ◽  
Author(s):  
Boris Kryštufek ◽  
Giovanni Amori ◽  
Gabriel Chişamera
Keyword(s):  
Sediment Budget ◽  
Taxonomic Identification ◽  
Chionomys Nivalis ◽  
Burrowing Activity ◽  
The Impact ◽  
Southern Carpathians

scholarly journals The development of the tidal basins in the Dutch Wadden Sea until 2100: the impact of accelerated sea-level rise and subsidence on their sediment budget – a synthesis

2018 ◽  
Vol 97 (3) ◽  
pp. 71-78 ◽  
Author(s):  
Ad J.F. van der Spek
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Wadden Sea ◽  
Sediment Budget ◽  
Ocean Dynamics ◽  
Critical Rate ◽  
Mean Sea Level ◽  
Intertidal Flats ◽  
Tidal Basins ◽  
The Impact

AbstractClimate change is very likely to cause a global acceleration in sea-level rise (SLR). The projected acceleration of SLR will also affect the Wadden Sea. In addition to an accelerated SLR, gas and salt extraction will cause subsidence that adds to an increase in water depth in the tidal basins. This will have consequences for the sediment budget of the Wadden Sea and especially for the intertidal flats that have a high ecological value. This synthesis presents projections of the future state of the Dutch Wadden Sea for the years 2030, 2050 and 2100.The projected changes in mean sea level by 2100 for Den Helder and Delfzijl are above the global mean projections, mainly due to the above-average ocean dynamics and glacio-isostatic adjustment contributions in the regional projections. The projected rise in mean sea level for 2100 with relation to 2018 in these locations is 0.41m, 0.52m and 0.76m for, respectively, the RCP2.6, RCP 4.5 and RCP8.5 climate scenarios.When we combine the presented SLR scenarios with the subsidence estimates and compare these rates to the critical rates for ‘drowning’ of intertidal flats that were calculated for the individual tidal basins, we can determine the moment that the maximum imported sediment volume can no longer compensate the increase in accommodation space in a basin and the intertidal flats will start to diminish in surface area and/or height. In the RCP2.6 scenario, the projected rates of relative SLR will be below the critical rate for drowning of the inlet systems in the Dutch Wadden Sea. For the RCP4.5 scenario, the critical SLR rate will be exceeded for Vlie Inlet in 2030, and for the RCP8.5 scenario the critical SLR rate will be exceeded for Vlie Inlet in 2030, Texel Inlet in 2050 and Ameland Inlet in 2100. For the other basins the critical rate will not be exceeded until 2100 or later.The way the intertidal flats in a basin will react to ‘drowning’ is not clear beforehand. It is highly possible that erosion of flats in one place will produce the sediment to maintain flats in other places. Tidal flats close to the sediment-delivering tidal inlet are not likely to disappear, because there the balance between supply and erosion is not likely to change.

scholarly journals Renal coccidiosis in the European cormorant Phalacrocorax aristotelis aristotelis from the Galician coast

2005 ◽  
Vol 85 (4) ◽  
pp. 1017-1019
Author(s):  
Elvira Abollo ◽  
Santiago Pascual
Keyword(s):  
Developmental Stage ◽  
Oil Spill ◽  
Host Tissue ◽  
Kidney Damage ◽  
Taxonomic Identification ◽  
Host Reaction ◽  
Mechanical Displacement ◽  
Galician Coast ◽  
The Impact ◽  
The Prestige

A developmental stage of a species of eimeriorin Apicomplexa was found heavily infecting the kidney of the European cormorant Phalacrocorax aristotelis aristotelis beached on the coast of Galicia after the oil spill from the ‘Prestige’. The immature condition of the parasite made a precise taxonomic identification impossible. The infection caused kidney damage as a result of pressure atrophy and mechanical displacement exerted by oocysts which occupied large areas of host tissue. A cellular host reaction was always apparent in the kidney of the infected cormorants. Although the oil effect is assumed to be responsible for the death of the cormorants, the impact of the coccidiosis should be monitored in the European shag populations.

scholarly journals Calculating the sediment budget of a tropical lake in the Blue Nile basin: Lake Tana

2016 ◽  
Author(s):  
F. A. Zimale ◽  
M. A. Mogus ◽  
M. L. Alemu ◽  
E. K. Ayana ◽  
S. S. Demissie ◽  
...  
Keyword(s):  
Sediment Concentration ◽  
Sediment Budget ◽  
Model Parameters ◽  
Lake Tana ◽  
Discharge Data ◽  
Blue Nile Basin ◽  
Lakes And Reservoirs ◽  
African Highlands ◽  
Upper Estimate ◽  
The Impact

Abstract. Soil erosion decreases soil fertility of the uplands and causes siltation of lakes and reservoirs. However, very little data exists to quantify accurately the impact of sediment on lakes in tropical monsoonal areas in the African highlands. Lake Tana is one of these lakes in Ethiopia. The objective of this study is to quantify the sediment budget for Lake Tana watershed with limited observational data. To overcome these limitations we use the Parameter Efficient Distributed (PED) model that has shown to perform well in the Ethiopian highlands. PED model parameters are calibrated using daily discharge data and sediment concentration infrequently measured for establishing sediment rating curves for the major rivers. The calibrated model parameters are then used to predict the sediment budget for the period 1994–2009. Sediment retained in the lake is calculated from two bathymetric taken 15 years apart and the sediment leaving the lake is based on measured discharge and observed sediment concentrations. Results show that annually on average 34 Mg/ha/year of sediment is removed from the gauged part of the Lake Tana watersheds. Depending on the up scaling method, 14 to 32 Mg/ha/year is transported from the watershed of which 82% to 96% (with the upper estimate more likely) is trapped on the floodplains and in the lake.

scholarly journals Structural Characteristics of the Main Resinous Stands from Southern Carpathians, Romania

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1029
Author(s):  
Gabriel Murariu ◽  
Lucian Dinca ◽  
Nicu Tudose ◽  
Vlad Crisan ◽  
Lucian Georgescu ◽  
...  
Keyword(s):  
Effect Size ◽  
Forest Structure ◽  
Mass Production ◽  
Management Practices ◽  
Statistical Approach ◽  
Forest Type ◽  
Abiotic Factors ◽  
Forest Site ◽  
The Impact ◽  
Southern Carpathians

The purpose of this study, which contains historical data recorded over a period of 40 years, was to identify the main factors that influence and control the level of wood mass production. The main reason was to optimize the management of forest areas and was driven by the necessity to identify factors that can influence most of the volume produced by coniferous forests located in southeast Europe. The data was collected between1980 and 2005 at the National Institute for Research and Development in Forestry, for forests located in the Southern Carpathians, Romania. The studied data refer to the parameters that model forest structure for spruce, fir, pine, and larch. These are the main resinous species found in the Southern Carpathians. The total area covered by these forests is 143,431 ha. At the forest species level, the analysis consists of 16,162 records (corresponding to the elements of the trees), covering an area of 45,008 ha for fir, 4711 ha for larch, 81,995 ha for spruce, and 11,717 ha for pine. The aim of this research has been to investigate and to assess the impact and magnitude of abiotic factors such as altitude and field aspect on forest structures from the main resinous stands located in the Southern Carpathians. Taking into account the size of the database as well as the duration for collecting data, a complete statistical and systematic approach was considered optimum. This resulted from our wish to emphasize and evaluate the influence of each analysed factor on the wood mass production level. The relationship between abiotic factors and forest structure has been analysed by using a systematic statistical approach in order to provide a useful theoretical reference for the improvement of forest management practices in the context of multiple climatic, environmental, and socio-economic challenges. These common characteristics have been found by applying ANOVA and multivariate statistical methods such as PCA and FA methods. A series of parameters were considered in this investigation, namely altitude (ALT), forest site type (TS), forest type (TP), consistency (CONS) etc. In order to obtain a complete image, we have also applied multivariate analysis methods that emphasize the effect size for each database parameter. At such a level of recorded data, the statistical approach ensures a factor level of p <0.001 while the accuracy in evaluating effect size is increased. As such, they influence the spreading and structure of the studied resinous stands to a higher degree, regardless of species.

Response of a coastal lagoon sediment budget to extreme events and climate change implications: The case of the Bay of Cadiz

2020 ◽  
Author(s):  
Madeline LeBlanc ◽  
Theocharis Plomaritis ◽  
Alejandro Lopez-Ruiz
Keyword(s):  
Climate Change ◽  
Coastal Lagoon ◽  
Sediment Budget ◽  
Sources And Sinks ◽  
Human Interactions ◽  
Lagoon Sediment ◽  
Bay Of Cadiz ◽  
Surrounding Areas ◽  
Bay Of Cádiz ◽  
The Impact

&lt;p&gt;Climate change has resulted in increased storminess and sea-level change that affects the morphodynamics of bays worldwide, impacting both the ecosystem and local infrastructure. This study explores the impact of differing storm winds on the sediment budget of the Bay of Cadiz. The Bay of Cadiz is a highly altered coastal lagoon located in Southwest Spain surrounded by ports, navigation channels, and urban developments and is of high socioeconomic and environmental importance. The human interactions with the bay have already caused morphological impacts, which could be exacerbated by increased storminess. Potential impacts on the sediment budget of the Bay of Cadiz will be modeled using a Delft3D model previously calibrated and tested using field data from December 2011 to January 2012. The model will consider a variety of storm wind scenarios and observe their impacts on sediment transport within the bay, identifying sources and sinks. This will help to estimate the potential impacts of climate change and increased storminess on the bay and the surrounding areas.&lt;/p&gt;

scholarly journals Impact of River Dams on Littoral Cells Located Adjacent to the River Mouth

2021 ◽  
Vol 16 (3) ◽  
pp. 942-952
Author(s):  
KAMAL NAG
Keyword(s):  
Image Processing ◽  
Suspended Sediment ◽  
River Mouth ◽  
Temporal Analysis ◽  
Sediment Budget ◽  
Sediment Supply ◽  
Water Diversion ◽  
Littoral Cells ◽  
Geomorphological Changes ◽  
The Impact

Terrestrial sediment is a major source of sediment to all coasts. Suspended sediment is carried away by the rivers and supplied to the coast to maintain sediment budget. The construction of dams across the rivers arrest sediment behind it and affect the sediment budget of littoral cells along the coast. Reduction in sediment supply induces ecological as well as geomorphological changes along the shoreline. Coastal erosion may accelerate due to reduced sediment influx. With the growing number of cross-river dams and water diversion projects, it has become a major concern before the scientific community to measure, understand and find solutions to multi-fold geo-environmental problems that are arising out of river damming. The present study aims to find out the impact of dams on the coast. It examines how the changes in the suspended sediment supply of an Indian river impact the coast in terms of loss of area due to erosion. Temporal analysis of geomorphological changes along the shoreline in relation to sediment influx holds immense importance to coastal management essential for the sustainable life and livelihood of coastal communities. Scientific investigation into the impact of river dams on the coastal environment is likely to provide a strong ground to reconsider the way present basin development projects function. Areal changes in littoral sediment cells adjacent to the river mouth have been quantified and correlated with changes in sediment influx. Changes along the shorelines have been detected through multispectral satellite images of Landsat belonging to different dates. Image processing and quantification of changes have been performed in QGIS 3.14 “Pi” platform. Virtual raster, raster calculator, field calculator and other required tools in QGIS were used during image processing.

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