Micropalaeontological record of Holocene estuarine and marine stages in the Corgo do Porto rivulet (Mira River, SW Portugal)

Alday, María; Cearreta, Alejandro; Cachão, Mário; Freitas, Maria Conceição; Andrade, César; Gama, Cristina

doi:10.1016/j.ecss.2005.10.010

Cited by 34 publications

(30 citation statements)

References 9 publications

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“…The former hypothesis seems to be more plausible since the marine transgressive maximum in the River Mira was reached about 5800 years ago and a marked deceleration in the rate of the sea level rise occurred from that time onwards (Alday et al, 2006), which is congruent with the Holocenic spatial expansion event postulated for the Mira population.…”

Section: Discussionsupporting

confidence: 53%

Comparisons of the genetic structure of Squalius populations (Teleostei, Cyprinidae) from rivers with contrasting histories, drainage areas and climatic conditions based on two molecular markers

Almada

Sousa‐Santos

2010

Molecular Phylogenetics and Evolution

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a b s t r a c tThe genetic structure of Squalius populations from Portuguese Atlantic-and Mediterranean-type streams (assigned to six distinct morphoclimatic regions) was compared using sequences of the cytb and betaactin genes. The drainage area was significantly correlated to all the genetic diversity indices, pointing to the need to control for this effect in comparing populations with different histories and paleoecologies. A significant correlation was also found between genetic diversity and the morphoclimatic regions to which the rivers were assigned, with the highest diversity in warmer, lower latitude, Mediterranean-type streams. This relationship was not due to idiosyncratic characteristics of the clades compared. When the drainage area and phylogenetic effects were removed, the southern Mediterranean streams harboured significantly more genetic diversity even when compared with much larger northern streams. It is argued that these results are likely caused both by the metapopulation structure of the Mediterranean streams and by the severe reduction or local extinction of populations in the northern rivers during glaciations.

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Section: Discussionsupporting

confidence: 53%

Comparisons of the genetic structure of Squalius populations (Teleostei, Cyprinidae) from rivers with contrasting histories, drainage areas and climatic conditions based on two molecular markers

Almada

Sousa‐Santos

2010

Molecular Phylogenetics and Evolution

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“…The integration of the data from both studies gives the value of 0.66 mm yr À1 with the squared correlation coefficient R 2 ¼ 0.55. In a recent study carried out in the Mira River Estuary on the Western Portuguese coast, Alday et al (2006) proposed a date of 6000 cal yr BP for the beginning of deceleration in the rate of sea level rise. However, the latter figure is based on only five dated samples of sediment organic matter, of which only one is more recent than 7000 cal yr BP and, therefore, the estimate may be to low.…”

Section: Reconstruction Of Environmental Changes During the Process Omentioning

confidence: 99%

Chronology of the sedimentary processes during the postglacial sea level rise in two estuaries of the Algarve coast, Southern Portugal

Boski

Camacho

Moura

et al. 2008

Estuarine, Coastal and Shelf Science

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“…Dated beach deposits from the estuarine margin of the central zone of the spit suggest its onset at least 6,500 years ago, coincident with a significant reduction on the rate of sea-level rise ca 7,000 cal year BP (Leorri et al 2012). This suggests spit formation approximately 1,000 years before previously published dates for SW Portugal (Alday et al 2006;Freitas et al 2002;Cearreta et al 2007), but simultaneous with similar systems along the northern coast of Portugal (Naughton et al 2007) and southern coast of Spain (Goy et al 2003). Differences in timing could be explained by the fact that the age of barriers has been previously inferred from depositional changes within lagoons or estuaries whereas the present work is based on the actual age of the coastal barrier.…”

Section: Initiation and Elongation Of The Spitmentioning

confidence: 60%

The Joint History of Tróia Peninsula and Sado Ebb-Delta

Rebelo

Brito

Burbidge³

et al. 2015

Coastal Research Library

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Traditionally, the study of coastal evolution has focused on emergent barriers or stratigraphic sequences on the adjacent shelf, but seldom are these two systems studied holistically or the information combined into a single model. Here, we combine data sets from the emerged and submerged sectors of a prograding coast, from the coastal dune to the innermost continental shelf, to reconstruct the long-term history of shelf reworking and spit elongation of Tr oia Peninsula in Portugal. This analysis involves synthesizing high-resolution reflection seismic profiles from the shoreface, Ground Penetrating Radar images from the emerged sand barrier, high resolution digital terrain models, and Optically Stimulated Luminescence and radiocarbon dating of sediment samples from the emergent sand barrier and backbarrier. The results document the growth of the sandy peninsula in five major phases of progradation represented by massive foredunes separated by hiatuses of sedimentation and periods of shoreline stability. Formation of the peninsula began circa 6,500 years ago by spit elongation from the south as documented by the oldest beach sediments within the spit. The spit enlarged until a tidal inlet was formed around 3,300 years ago, which caused the construction of the ebb-tidal delta. The latter sequestrated the sand supplied to the spit inhibiting spit progradation until the ebb delta reached an equilibrium volume, allowing shoreline

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Micropalaeontological record of Holocene estuarine and marine stages in the Corgo do Porto rivulet (Mira River, SW Portugal)

Cited by 34 publications

References 9 publications

Comparisons of the genetic structure of Squalius populations (Teleostei, Cyprinidae) from rivers with contrasting histories, drainage areas and climatic conditions based on two molecular markers

Comparisons of the genetic structure of Squalius populations (Teleostei, Cyprinidae) from rivers with contrasting histories, drainage areas and climatic conditions based on two molecular markers

Chronology of the sedimentary processes during the postglacial sea level rise in two estuaries of the Algarve coast, Southern Portugal

The Joint History of Tróia Peninsula and Sado Ebb-Delta

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