Paleoenvironmental variability and anthropic influence during the last 7300 years in the western Mediterranean based on the pollen record of Cartagena Bay, SE Spain

2022 ◽  
pp. 110839
Author(s):  
María José Gil-García ◽  
Blanca Ruiz-Zapata ◽  
José E. Ortiz ◽  
Trinidad Torres ◽  
Milagros Ros ◽  
...  
Keyword(s):  
Western Mediterranean ◽  
Pollen Record ◽  
Se Spain ◽  
Anthropic Influence

scholarly journals Early anthropogenic change in western Mediterranean mountains (Sierra Nevada, SE Spain)

Anthropocene ◽  
2021 ◽  
Vol 33 ◽  
pp. 100278
Author(s):  
Francisca Alba-Sánchez ◽  
Daniel Abel-Schaad ◽  
José Antonio López-Sáez ◽  
Silvia Sabariego-Ruiz ◽  
Sebastián Pérez-Díaz ◽  
...  
Keyword(s):  
Sierra Nevada ◽  
Western Mediterranean ◽  
Anthropogenic Change ◽  
Se Spain ◽  
Mediterranean Mountains

scholarly journals The Messinian stromatolites of the Sierra del Colmenar (Western Mediterranean): facies characterization and sedimentological interpretation

2018 ◽  
Author(s):  
Patricio Guillermo Villafañe ◽  
Hugo Corbí ◽  
Carlos Cónsole-Gonella ◽  
Francisco Javier Ruiz-Sánchez
Keyword(s):  
Physical Environment ◽  
Environmental Changes ◽  
Western Mediterranean ◽  
Carbonate Complex ◽  
Se Spain ◽  
Internal Morphology ◽  
Facies Characterization ◽  
Bajo Segura Basin ◽  
Terminal Carbonate Complex ◽  
Northern Sector

The Messinian stromatolites belonging to the Terminal Carbonate Complex unit, from the northern sector of the Bajo Segura Basin (CAM section, Sierra del Colmenar, SE Spain) have been studied. To understand the direct relationship between the morphologies of the stromatolites and their deposition context in order to reconstruct the environmental conditions for their growth, a detailed study of their architecture, external morphology and internal morphology was carried out (macrofabric and microfabric). The stromatolites are made up of domic bodies laterally linked to each other, generating a macrostructure (bioherms) with lateral continuity. This stromatolitic macrostructure presents variations in its internal morphology, giving rise to seven subfacies product of the environmental changes experienced during the growth of the microbial bushes. The stromatolites are arranged parallel of coastline acting as paleogeographic barriers to reduce the physical stress of the environment. Although in general lines suggests a coastal environment, restricted and shallow for the formation of the whole level, the variation in internal morphology is evidence of minor changes in the physical environment.

An environmental snapshot of the Bølling interstadial in Southern Iberia

2014 ◽  
Vol 81 (2) ◽  
pp. 284-294 ◽  
Author(s):  
Antonio García-Alix ◽  
Gonzalo Jiménez-Moreno ◽  
Francisco J. Jiménez-Espejo ◽  
Fernando García-García ◽  
Antonio Delgado Huertas
Keyword(s):  
Environmental Changes ◽  
Warming Trend ◽  
Western Mediterranean ◽  
Pollen Record ◽  
Opposite Pattern ◽  
Climatic Trend ◽  
Northern Latitudes ◽  
Time Period ◽  
Southern Iberia ◽  
Climatic Record

AbstractThe Bølling–Allerød interstadial is the closest warm time period to the Holocene. The study of the climate variability during this most recent warm scenario provides a natural record of potential environmental changes related with global temperature variations. Little is known about this interstadial in the Southern Iberian Peninsula. Therefore, the exceptional climatic record of the Otiñar paleo-lake (ca. 14.5–14.0 cal ka BP), provides environmental information about the first part of this interstadial (Bølling) in this key region. Although the studied high-resolution isotopic record point to almost invariant hydrological conditions in the paleo-lake, with little change in the carbon budget and important limestone dissolution, the pollen record shows an increase in forest species that can be interpreted as a warming trend and an increase in humidity during the Bølling in the area. This record is one of the few continental archives that show this climatic trend in Southern Iberia, agreeing with many other regional records from the western Mediterranean. This does not agree with higher latitude records that show an opposite trend. This opposite pattern in precipitation between the western Mediterranean and more northern latitudes could be explained by a persistent and increasing negative NAO mode during the Bølling in this area.

scholarly journals The Holocene Cedrus pollen record from Sierra Nevada (S Spain), a proxy for climate change in N Africa

2020 ◽  
Author(s):  
Gonzalo Jiménez-Moreno ◽  
R. Scott Anderson ◽  
María J. Ramos-Román ◽  
Jon Camuera ◽  
Jose Manuel Mesa-Fernández ◽  
...  
Keyword(s):  
Sierra Nevada ◽  
Climatic Variability ◽  
Mediterranean Area ◽  
Western Mediterranean ◽  
Northern Africa ◽  
Pollen Record ◽  
North African ◽  
The Holocene ◽  
Middle And Late Holocene ◽  
Millennial Scale

<p>In this study, we synthesized pollen data from seven sites from the Sierra Nevada in southern Spain to investigate the response of forests in the western Mediterranean area to centennial- and millennial-scale climate changes and to human impact during the Holocene. In particular, here we focused in <em>Cedrus</em> pollen abundances, which most-likely originated from Northern Africa and were carried to Sierra Nevada by wind. Although <em>Cedrus</em> abundances are generally lower than 1% in the studied pollen samples, a comparison with North African pollen records shows similar trends at long- and short-term time-scales. Therefore, this record could be used as a proxy for changes in this forest species in North Africa. A Middle and Late Holocene <em>Cedrus</em> pollen increasing trend has been observed in the Sierra Nevada synthetic record, which seems to be the result of decreasing summer insolation. This would have produced overall cooler annual temperatures in Northern Africa (Atlas and Rif Mountains), benefiting the growth of this cool-adapted montane tree species, and lower summer evaporation, increasing available moisture during the summer, which is critical for this water-demanding species. Millennial- and centennial-scale variability also characterize the Sierra Nevada <em>Cedrus</em> synthetic record. <em>Cedrus</em> abundance oscillations could have been produced by well-known millennial-scale climatic variability that controlled cedar abundance in montane areas of N Africa.  </p>

scholarly journals The Messinian stromatolites of the Sierra del Colmenar (Western Mediterranean): facies characterization and sedimentological interpretation

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5766 ◽  
Author(s):  
Patricio Guillermo Villafañe ◽  
Hugo Corbí ◽  
Carlos Cónsole-Gonella ◽  
Francisco Javier Ruiz-Sánchez ◽  
Jesús Miguel Soria
Keyword(s):  
Physical Environment ◽  
Microbial Mats ◽  
Environmental Changes ◽  
Western Mediterranean ◽  
Se Spain ◽  
Internal Morphology ◽  
Facies Characterization ◽  
Bajo Segura Basin ◽  
Terminal Carbonate Complex ◽  
Erosive Effect

A representative outcrop of the Messinian stromatolites belonging to the Terminal Carbonate Complex unit, from the northern sector of the Bajo Segura basin (Caja de Ahorros del Mediterraneosection, Sierra del Colmenar, SE Spain) has been studied. Here, we present a detailed analysis of the architecture, external morphology, and internal morphology in order to reconstruct the environmental and palaeoecological conditions for their growth. The stromatolites macrostructure consists of a continuously doming type morphology (build up and sheets areas). These developed close to the coast and acted as a palaeogeographic barrier, reducing physical stress, channeling the erosive effect of water and favoring restricted conditions. This stromatolitic macrostructure exhibits variations in its internal morphology, giving rise to seven subfacies, which are a product of the environmental changes experienced during the growth of the microbial mats. Although broadly suggesting a coastal environment, restricted and shallow during formation, the variation in internal morphology (mesostructure and microstructure) is evidence of minor changes in the physical environment that indicate a progressive shallowing.

scholarly journals Effects of environmental variables on the distribution of juvenile cubomedusae Carybdea marsupialis in the coastal Western Mediterranean

2020 ◽  
Author(s):  
Cesar Bordehore ◽  
Eva S. Fonfría ◽  
Cristina Alonso ◽  
Beatriz Rubio-Tortosa ◽  
Melissa J. Acevedo ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Space Versus ◽  
Western Mediterranean ◽  
Zooplankton Abundance ◽  
Se Spain ◽  
High Productivity ◽  
Spatial And Temporal Distributions ◽  
Near Shore ◽  
First Time ◽  
Carybdea Marsupialis

AbstractRelationships between environmental factors and oscillations in jellyfish abundance, especially in the early life stages, could help to interpret past increases and also predict scenarios in a changing future. For the first time, we present cubozoan spatial and temporal distributions in the earliest stages and their relationships with different factors. Abundances of Carybdea marsupialis medusae showed high interannual variability from 2008 to 2014 along the Dénia coast (SE Spain, W Mediterranean). During 2015, samples were collected from 11 beaches along 17 km of coastline, 8 times from January to November in order to determine the effects of environmental factors on the distribution of juvenile C. marsupialis. Juveniles (≤ 15 mm diagonal bell width) were present from May to July, with more sampled near shore (0 – 15 m). Most of them occurred in June when their numbers were unequal among beaches (average 0.05 ind m−3, maximum 6.71 ind m−3). We tested distributions of juveniles over time and space versus temperature, salinity, nutrients (N, P and Si), chlorophyll-a (Chl-a), and zooplankton abundance. Temperature and cladocerans (zooplankton group) were significantly positively correlated with juvenile distribution, whereas Chl-a concentration was weakly negative. By contrast, in 2014, high productivity areas (Chl-a and zooplankton) overlapped the maximum adult abundance (5.2 ind m−3). The distribution of juveniles during 2015 did not spatially coincide with the areas where ripe adults were located the previous year, suggesting that juveniles drift with the currents upon release from the cubopolyps. Our results yield important insights into the complexity of cubozoan distributions.

Holocene morphogenesis along a tectonically unstable coastline in the Western Mediterranean (SE Spain)

2011 ◽  
Vol 243 (1) ◽  
pp. 231-248 ◽  
Author(s):  
T. Rodríguez-Estrella ◽  
F. Navarro ◽  
M. Ros ◽  
J. Carrión ◽  
J. Atenza
Keyword(s):  
Western Mediterranean ◽  
Se Spain
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