Variability in storm climate along the Gulf of Cadiz: the role of large scale atmospheric forcing and implications to coastal hazards

2015 ◽  
Vol 45 (9-10) ◽  
pp. 2499-2514 ◽  
Author(s):  
Theocharis A. Plomaritis ◽  
Javier Benavente ◽  
Irene Laiz ◽  
Laura Del Río
Keyword(s):  
Large Scale ◽  
Coastal Hazards ◽  
Atmospheric Forcing ◽  
Gulf Of Cadiz ◽  
Gulf Of Cádiz

Large-scale slope failure involving Triassic and Middle Miocene salt and shale in the Gulf of Cadiz (Atlantic Iberian Margin)

Terra Nova ◽  
2003 ◽  
Vol 15 (6) ◽  
pp. 380-391 ◽  
Author(s):  
Adolfo Maestro ◽  
Luis Somoza ◽  
Teresa Medialdea ◽  
Christopher J. Talbot ◽  
Allen Lowrie ◽  
...  
Keyword(s):  
Large Scale ◽  
Middle Miocene ◽  
Slope Failure ◽  
Gulf Of Cadiz ◽  
Gulf Of Cádiz ◽  
Iberian Margin

The role of the Gulf of Cadiz circulation in the redistribution of trace metals between the Atlantic Ocean and the Mediterranean Sea

2020 ◽  
Vol 719 ◽  
pp. 134964 ◽  
Author(s):  
I. Laiz ◽  
S. Plecha ◽  
A. Teles-Machado ◽  
E. González-Ortegón ◽  
D. Sánchez-Quiles ◽  
...  
Keyword(s):  
Trace Metals ◽  
Atlantic Ocean ◽  
Mediterranean Sea ◽  
Gulf Of Cadiz ◽  
Gulf Of Cádiz ◽  
The Mediterranean

scholarly journals The role of neo-tectonics in the sedimentary infilling and geomorphological evolution of the Guadalquivir estuary (Gulf of Cadiz, SW Spain) during the Holocene

Geomorphology ◽  
2014 ◽  
Vol 219 ◽  
pp. 126-140 ◽  
Author(s):  
Antonio Rodríguez-Ramírez ◽  
Enrique Flores-Hurtado ◽  
Carmen Contreras ◽  
Juan J.R. Villarías-Robles ◽  
Gonzalo Jiménez-Moreno ◽  
...  
Keyword(s):  
Gulf Of Cadiz ◽  
Guadalquivir Estuary ◽  
The Holocene ◽  
Sw Spain ◽  
Gulf Of Cádiz ◽  
Geomorphological Evolution

scholarly journals Chemosymbiotic species from the Gulf of Cadiz (NE Atlantic): distribution, life styles and nutritional patterns

2013 ◽  
Vol 10 (4) ◽  
pp. 2569-2581 ◽  
Author(s):  
C. F. Rodrigues ◽  
A. Hilário ◽  
M. R. Cunha
Keyword(s):  
Stable Isotope ◽  
Spatial Scales ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Nutrient Sources ◽  
Life Styles ◽  
Gulf Of Cádiz ◽  
Specific Variation ◽  
Study Sites

Abstract. Previous work in the mud volcanoes from the Gulf of Cadiz (South Iberian Margin) revealed a high number of chemosymbiotic species, namely bivalves and siboglinid polychaetes. In this study we give an overview of the distribution and life styles of these species in the Gulf of Cadiz, determine the role of autotrophic symbionts in the nutrition of selected species using stable isotope analyses (δ13C, δ15N and δ34S) and investigate the intra-specific variation of isotope signatures within and between study sites. During our studies, we identified twenty siboglinidae and nine bivalve chemosymbiotic species living in fifteen mud volcanoes. Solemyid bivalves and tubeworms of the genus Siboglinum are widespread in the study area, whereas other species were found in a single mud volcano (e.g. "Bathymodiolus" mauritanicus) or restricted to deeper mud volcanoes (e.g. Polybrachia sp., Lamelisabella denticulata). Species distribution suggests that different species may adjust their position within the sediment according to their particular needs, and to the intensity and variability of the chemical substrata supply. Tissue stable isotope signatures for selected species are in accordance with values found in other studies, with thiotrophy as the dominant nutritional pathway, and with methanotrophy and mixotrophy emerging as secondary strategies. The heterogeneity in terms of nutrient sources (expressed in the high variance of nitrogen and sulphur values) and the ability to exploit different resources by the different species may explain the high diversity of chemosymbiotic species found in the Gulf of Cadiz. This study increases the knowledge on distributional patterns and resource partitioning of chemosymbiotic species and highlights how trophic fuelling varies on spatial scales with direct implications to seep assemblages and potentially to the biodiversity of continental margin.

scholarly journals Chemosymbiotic species from the Gulf of Cadiz (NE Atlantic): distribution, life styles and nutritional patterns

2012 ◽  
Vol 9 (12) ◽  
pp. 17347-17376 ◽  
Author(s):  
C. F. Rodrigues ◽  
A. Hilário ◽  
M. R. Cunha
Keyword(s):  
Trophic Ecology ◽  
Mud Volcanoes ◽  
Gulf Of Cadiz ◽  
Nutrient Sources ◽  
Life Styles ◽  
Starting Point ◽  
Gulf Of Cádiz ◽  
Specific Variation ◽  
Study Sites

Abstract. Previous work in the mud volcanoes from the Gulf of Cadiz revealed a high number of chemosymbiotic species, namely bivalves and siboglinid polychaetes. In this study we give an overview of the distribution and life styles of those species in the Gulf of Cadiz, determine the role of autotrophic symbionts in the nutrition of selected species using stable isotope analyses (δ13C, δ15N and δ34S) and investigate the intra-specific variation of isotope signatures within and between study sites. Twenty siboglinid and nine bivalve chemosymbiotic species have been identified and were found living in fifteen mud volcanoes during our studies. Solemyids bivalves and tubeworms of the genus Siboglinum are the most widespread, whereas other species were found in a single mud volcano (e.g. "Bathymodiolus" mauritanicus) or restricted to deeper mud volcanoes (e.g. Polybrachia sp., Lamelisabella denticulata). Species distribution suggests that different species may adjust their position within the sediment according to their particular needs and intensity and variability of the chemical substrata supply. Isotopic values found for selected species are in accordance with values found in other studies, with thiotrophy as the dominant nutritional pathway, and with methanotrophy and mixotrophy emerging as secondary strategies. The heterogeneity in terms of nutrient sources (expressed in the high variance of nitrogen and sulphur values) and the ability to exploit different resources by the different species may explain the high diversity of chemosymbiotic species found in the Gulf of Cadiz. This study increases the knowledge of the chemosymbiotic species in the Gulf of Cadiz, highlight the relevance of seep chemoautolithotrophic production in this area and provide a starting point for future trophic ecology studies.

The Role of Sense of Direction and Other Factors During Navigation in a Large-Scale, Unconstrained Environment

2013 ◽  
Author(s):  
Elisabeth J. Ploran ◽  
Ericka Rovira ◽  
James C. Thompson ◽  
Raja Parasuraman
Keyword(s):  
Large Scale ◽  
Sense Of Direction

Magnetic Properties of xCeO2•(50 − x) PbO•50B2O3 Glasses and Glass Ceramics

2017 ◽  
Vol 13 (1) ◽  
pp. 4486-4494 ◽  
Author(s):  
G.El Damrawi ◽  
F. Gharghar
Keyword(s):  
Magnetic Properties ◽  
Large Scale ◽  
Glass Ceramics ◽  
Magnetic Behavior ◽  
Crystal Formation ◽  
Dual Roles ◽  
Effective Agent ◽  
Ordered Structures ◽  
Essential Change

Cerium oxide in borate glasses of composition xCeO2·(50 − x)PbO·50B2O3 plays an important role in changing both microstructure and magnetic behaviors of the system. The structural role of CeO2 as an effective agent for cluster and crystal formation in borate network is clearly evidenced by XRD technique. Both structure and size of well-formed cerium separated clusters have an effective influence on the structural properties. The cluster aggregations are documented to be found in different range ordered structures, intermediate and long range orders are the most structures in which cerium phases are involved. The nano-sized crystallized cerium species in lead borate phase are evidenced to have magnetic behavior.  The criteria of building new specific borate phase enriched with cerium as ferrimagnetism has been found to keep the magnetization in large scale even at extremely high temperature. Treating the glass thermally or exposing it to an effective dose of ionized radiation is evidenced to have an essential change in magnetic properties. Thermal heat treatment for some of investigated materials is observed to play dual roles in the glass matrix. It can not only enhance alignment processes of the magnetic moment but also increases the capacity of the crystallite species in the magnetic phases. On the other hand, reverse processes are remarked under the effect of irradiation. The magnetization was found to be lowered, since several types of the trap centers which are regarded as defective states can be produced by effect of ionized radiation. 

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