Spatial and Seasonal Variation of In Situ Benthic Fluxes in the Bay of Cadiz (South-west Spain)

1994 ◽  
Vol 39 (2) ◽  
pp. 127-141 ◽  
Author(s):  
J.M. Forja ◽  
J. Blasco ◽  
A. Gómez-Parra
Keyword(s):  
Seasonal Variation ◽  
Benthic Fluxes ◽  
South West ◽  
Spatial And Seasonal Variation ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz

Physico-Chemical Parameters in Mountain Freshwater: Cuejdi River from Eastern Carpathians, Romania

2015 ◽  
Vol 660 ◽  
pp. 257-261 ◽  
Author(s):  
Alin Mihu-Pintilie ◽  
Gheorghe Romanescu ◽  
Cristian Constantin Stoleriu ◽  
Iuliana Gabriela Breabăn
Keyword(s):  
Water Quality ◽  
Seasonal Variation ◽  
Anthropogenic Pollution ◽  
Mountain Streams ◽  
Chemical Parameters ◽  
Laboratory Bench ◽  
Spatial And Seasonal Variation ◽  
Physico Chemical ◽  
Eastern Carpathians

Spatial and seasonal variation of physico-chemical parameters of mountain streams is influenced by anthropogenic pollution pressure. The assessment of Cuejdi river water quality from Stânişoarei Mountains through 13 parameters, was performed. 30 samples each were collected during spring and autumn of 2013/2014, measurements being made both in situ aquatic ecosystem (Multi 350i / SET WTW) and in laboratory (bench meter Hanna HI 4421, Titroline 700 SI Analytics and WTW Turb 555IR).

scholarly journals Using a UAV-Mounted Multispectral Camera for the Monitoring of Marine Macrophytes

2021 ◽  
Vol 8 ◽  
Author(s):  
Alejandro Román ◽  
Antonio Tovar-Sánchez ◽  
Irene Olivé ◽  
Gabriel Navarro
Keyword(s):  
Minimum Distance ◽  
Anthropogenic Activities ◽  
Seagrass Meadows ◽  
Natural Park ◽  
Marine Macrophytes ◽  
Caulerpa Prolifera ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz ◽  
Multispectral Camera

Marine macrophytes constitute one of the most productive ecosystems on the planet, as well as one of the most threatened by anthropogenic activities and climate change. Their monitoring is therefore essential, which has experienced a fast methodological evolution in recent years, from traditional in situ sampling to the use of satellite remote sensing, and subsequently by sensors mounted on unmanned aerial vehicles (UAV). This study aims to advance the monitoring of these ecosystems through the use of a UAV equipped with a 10-band multispectral camera, using different algorithms [i.e., maximum likelihood classifier (MLC), minimum distance classifier (MDC), and spectral angle classifier (SAC)], and using the Bay of Cádiz Natural Park (southern Spain) as a case of study. The results obtained with MLC confirm the suitability of this technique for detecting and differentiating seagrass meadows in a range of 0–2 m depth and the efficiency of this tool for studying and monitoring marine macrophytes in coastal areas. We inferred the existence of a cover of 25452 m2 of Cymodocea nodosa, and macroalgae species such as Caulerpa prolifera, covering 22172 m2 of Santibañez (inner Bay of Cádiz).

scholarly journals Seasonal Variability of Dissolved Nutrients in Mangrove Ecosystems along South West Coast of Kerala, India.

2009 ◽  
Vol 3 ◽  
pp. 32-42
Author(s):  
R Geetha ◽  
N Chandramohanakumar ◽  
Lizen Mathews
Keyword(s):  
Seasonal Variation ◽  
Constructed Wetland ◽  
Mangrove Forest ◽  
Nutrient Level ◽  
Bruguiera Gymnorrhiza ◽  
Dissolved Nutrients ◽  
South West ◽  
Mangrove Ecosystems ◽  
Spatial And Seasonal Variation ◽  
South West Coast

The mangroves of Kerala are fast disappearing due to developmental activities. There are very few studies conducted in the chemical aspects of these ecosystems. The main objective of this study is to assess the spatial and seasonal variation of hydrographical as well as nutrients in mangrove ecosystems along Kerala coast. Five sampling sites least intervened by industries were selected for the study. Sampling was done for a period of six months in monthly intervals. A monsoonal hike of dissolved nutrients was observed in all ecosystems except in the constructed mangrove wetland. The constructed wetland exhibited a different hydrography and nutrient level in all seasons. The mangrove forest in this area consists of the species Bruguiera gymnorrhiza which has been planted since forty years. Key words: wetlands; mangroves; nutrients; season; constructed wetland DOI: 10.3126/jowe.v3i0.2264 Journal of Wetlands Ecology, (2009) Vol. 3, pp 32-42

In-situ U-Pb dating of Ries Crater lacustrine carbonates (Miocene, South-West Germany): Implications for continental carbonate chronostratigraphy

2021 ◽  
Vol 568 ◽  
pp. 117011
Author(s):  
Damaris Montano ◽  
Marta Gasparrini ◽  
Axel Gerdes ◽  
Giovanna Della Porta ◽  
Richard Albert
Keyword(s):  
West Germany ◽  
South West ◽  
Lacustrine Carbonates

scholarly journals UAS Identify and Monitor Unusual Small-Scale Rhythmic Features in the Bay of Cádiz (Spain)

2021 ◽  
Vol 13 (6) ◽  
pp. 1188
Author(s):  
Lara Talavera ◽  
Javier Benavente ◽  
Laura Del Río
Keyword(s):  
Monitoring Program ◽  
Wave Theory ◽  
Circulation Pattern ◽  
Low Energy ◽  
Small Scale ◽  
Unmanned Aerial Systems ◽  
Spatiotemporal Resolution ◽  
Novel Technologies ◽  
Bay Of Cadiz ◽  
Bay Of Cádiz

Unusual shore-normal and barred-like rhythmic features were found in Camposoto Beach (Bay of Cádiz, SW Spain) during a monitoring program using unmanned aerial systems (UAS). They appeared in the backshore and persisted for 6 months (October 2017–March 2018). Their characteristics and possible formation mechanism were investigated analyzing: (1) UAS-derived high-resolution digital elevation models (DEMs), (2) hydrodynamic conditions, and (3) sediment samples. The results revealed that the features did not migrate spatially, that their wavelength was well predicted by the edge wave theory, and that they shared characteristics with both small-scale low-energy finger bars (e.g., geometry/appearance and amplitude) and swash cusps (e.g., wavelength, seaward circulation pattern, and finer and better sorted material in the runnels with respect to the crests). Our findings pinpoint to highly organized swash able to reach the backshore during spring tides under low-energy and accretionary conditions as well as backwash enhanced by conditions of water-saturated sediment. This study demonstrates that rhythmic features can appear under different modalities and beach locations than the ones observed up to date, and that their unusual nature may be attributed to the low spatiotemporal resolution of the traditional coastal surveying methods in comparison with novel technologies such as UAS.

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