The structure of incipient coastal counter currents in South Portugal as indicator of their forcing agents

2021 ◽  
Vol 214 ◽  
pp. 103486
Author(s):  
L. De Oliveira Júnior ◽  
E. Garel ◽  
P. Relvas
Keyword(s):  
South Portugal

scholarly journals Further observations on North African and South Iberian Bathyporeia (Crustacea, Amphipoda), with the description of a new species

2005 ◽  
Vol 74 (3-4) ◽  
pp. 279-300
Author(s):  
Cédric d’Udekem d’Acoz ◽  
Hind Myrieme Chams Echchaoui ◽  
Mohamed Menioui
Keyword(s):  
New Species ◽  
North Africa ◽  
New Records ◽  
Southern Spain ◽  
North African ◽  
Characteristic Species ◽  
South Portugal ◽  
First Time ◽  
A New Species

A new species of amphipod, Bathyporeia watkini sp. nov. from the Atlantic coasts of North Africa is described. This very characteristic species is abundant in some lagoons and estuaries near 28°N. New morphological information on B. elkaimi d’Udekem d’Acoz and Menioui, 2004 is given after specimens that were recently collected on the Atlantic coasts of southern Spain and South Portugal. The male of B. ledoyeri d’Udekem d’Acoz and Menioui, 2004 is described for the first time and new records of North African B. guilliamsoniana (Bate, 1857) and B. chevreuxi d'Udekem d'Acoz and Vader, 2005a are discussed.

Ivory in the Chalcolithic enclosure of Perdigões (South Portugal): the social role of an exotic raw material

2015 ◽  
Vol 47 (3) ◽  
pp. 390-413 ◽  
Author(s):  
António Carlos Valera ◽  
Thomas Xaver Schuhmacher ◽  
Arun Banerjee
Keyword(s):  
Social Role ◽  
Raw Material ◽  
The Social ◽  
South Portugal

Performance of intertidal topography video monitoring of a meso-tidal reflective beach in South Portugal

2011 ◽  
Vol 61 (10) ◽  
pp. 1521-1540 ◽  
Author(s):  
Michalis Ioannis Vousdoukas ◽  
Pedro Manuel Ferreira ◽  
Luis Pedro Almeida ◽  
Guillaume Dodet ◽  
Fotis Psaros ◽  
...  
Keyword(s):  
Video Monitoring ◽  
South Portugal

Salt marshes adjustment to anthropogenic pressures and sea-level rise

2021 ◽  
Author(s):  
A. Rita Carrasco ◽  
Katerina Kombiadou ◽  
Miguel Amado
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
Salt Marshes ◽  
Anthropogenic Pressures ◽  
The Past ◽  
Ria Formosa ◽  
Sediment Loads ◽  
Human Interventions ◽  
South Portugal ◽  
And Sea Level

<p>It is predictable that salt marshes in regions, where sediment loads are high, should be stable against a broader range of relative sea level scenarios than those in sediment-poor systems. Despite extensive theoretical and laboratory studies, additional syntheses of marsh ‘persistence’ indicators under human interventions and accelerated sea-level rise rates are still needed. This study investigates the recent lateral changes occurring in lagoon-type marshes of the Ria Formosa lagoon (south Portugal) in the presence of human interventions and sea-level rise, to identify the major drivers for past marsh evolution and to estimate potential future trends. The conducted analysis assessed the past geomorphological adjustment based on imagery analysis and assessed its potential future adjustment to sea-level rise (~100 years) based on modelled land cover changes (by employing the SLAMM model within two sea-level rise scenarios).</p><p>Salt marshes in the Ria Formosa showed slow lateral growth rates over the last 70 years (<1 mm∙yr<sup>-1</sup>), with localized erosion along the main navigable channels associated with dredging activities. Higher change rates were noted near the inlets, with stronger progradation near the natural inlets of the system, fed by sediment influx pulses. Any potential influence of sea-level increase to an intensification of marsh-edge erosion in the past, could not be distinguished from human-induced pressures in the area. No significant sediment was exchanged between the salt marshes and tidal flats, and no self-organization pattern between them was observed in past. The related analysis showed that landcover changes in the salt marsh areas are likely to be more prominent in the future. The obtained results showed evidence of non-linearity in marsh response to high sea-level rise rates, which could indicate to the presence of critical thresholds and potential negative feedbacks within the system, with significant implications to marsh resilience.</p>

scholarly journals Antibacterial, antioxidant and anti-proliferative properties and zinc content of five south Portugal herbs

2016 ◽  
Vol 55 (1) ◽  
pp. 114-123 ◽  
Author(s):  
Ricardo Nunes ◽  
Pawel Pasko ◽  
Malgorzata Tyszka-Czochara ◽  
Agnieszka Szewczyk ◽  
Marek Szlosarczyk ◽  
...  
Keyword(s):  
Zinc Content ◽  
South Portugal

scholarly journals Historical variation and trends in storminess along the Portuguese South Coast

2011 ◽  
Vol 11 (9) ◽  
pp. 2407-2417 ◽  
Author(s):  
L. P. Almeida ◽  
Ó. Ferreira ◽  
M. I. Vousdoukas ◽  
G. Dodet
Keyword(s):  
Wave Height ◽  
Linear Increase ◽  
Annual Number ◽  
The North ◽  
Storm Wave ◽  
Using Data ◽  
The North Atlantic Oscillation ◽  
Historical Variation ◽  
Storm Characteristics ◽  
South Portugal

Abstract. This work investigates historical variation and trends in storm climate for the South Portugal region, using data from wave buoy measurements and from modelling, for the period 1952 to 2009. Several storm parameters (annual number of storms; annual number of days with storms; annual maximum and mean individual storm duration and annual 99.8th percentile of significant wave height) were used to analyse: (1) historical storminess trends; (2) storm parameter variability and relationships; and (3) historical storminess and its relationship to the North Atlantic Oscillation (NAO). No statistically significant linear increase or decrease was found in any of the storm parameters over the period of interest. The main pattern of storm characteristics and extreme wave heights is an oscillatory variability with intensity peaks every 7–8 yr, and the magnitude of recent variations is comparable with that of variations observed in the earlier parts of the record. In addition, the results reveal that the NAO index is able to explain only a small percentage of the variation in storm wave height, suggesting that more local factors may be of importance in controlling storminess in this region.

Regional study of hard rock aquifers in Alentejo, South Portugal

2007 ◽  
pp. 73-93 ◽  
Author(s):  
Ant√≥nio Chambel ◽  
Jo√£o Nascimento ◽  
Jorge Duque
Keyword(s):  
Hard Rock ◽  
Regional Study ◽  
Hard Rock Aquifers ◽  
South Portugal

scholarly journals Identifying Métiers Using Landings Profiles: An Octopus-Driven Multi-Gear Coastal Fleet

2021 ◽  
Vol 9 (9) ◽  
pp. 1022
Author(s):  
Monika J. Szynaka ◽  
Karim Erzini ◽  
Jorge M. S. Gonçalves ◽  
Aida Campos
Keyword(s):  
Clustering Analysis ◽  
Limited Data ◽  
Target Species ◽  
Fishing Gears ◽  
Initial Characterization ◽  
Management Advice ◽  
South Portugal

The multi-gear coastal vessels in the Algarve (South Portugal) own licenses for various fishing gears. However, it is generally uncertain what gears they use, which is problematic as each individual gear is responsible for unique impacts on the resources and the environment. In this study, landing profiles identified for the multi-gear coastal fleet (2012–2016) were used as support in defining potential métiers using k-mean clustering analysis (CLARA) along with information from past studies on métiers. The results showed that more than 50% of the vessels were engaged in the octopus fishery year-round, using traps, while a small percentage (~13%) were entirely dedicated to clam dredging. In general, gillnets (21%) were used to target monkfish, hake and bastard soles, while trammel nets (6%) were used to target cuttlefish, with some vessels alternating the fishing gears (either seasonally or annually) according to target species. The method for the initial characterization of this fleet’s métiers and its efficiency with limited data is discussed, as well as the utility of this segmentation in support of management advice.

Gentrifiers Against Gentrification

2020 ◽  
pp. 1-23
Author(s):  
Jorge André Guerreiro ◽  
João Filipe Marques
Keyword(s):  
Mixed Methods ◽  
Mixed Methods Research ◽  
Fishing Industry ◽  
Short Term ◽  
Industrial City ◽  
The Future ◽  
Historic Centre ◽  
South Portugal ◽  
The City

This chapter presents a case-study of tourism gentrification in a fishing town in Algarve, South Portugal. Olhão is a former industrial city that saw much of its fishing industry disappear since the 1980s. Over the last few years, hundreds of foreigners have moved into its historic centre. This rapid influx of citizens to derelict neighbours mostly comprised of old retirees and few active fishermen prompted a gentrification process. Olhão now faces the threat of mass displacements of its older and most vulnerable citizens, a fact that is worrying the foreigners that criticize the touristification of the city, with rents at historical highs and landlords forcing out the Portuguese residents in order to promote short-term rentals to tourists. The chapter presents the results obtained from an extensive mixed-methods research, ending with some notes about the future of the city and the implications that can be taken from this case.

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