Enzymatic biomarkers in the crab Carcinus maenas from the Minho River estuary (NW Portugal) exposed to zinc and mercury

Chemosphere ◽  
2007 ◽  
Vol 66 (7) ◽  
pp. 1249-1255 ◽  
Author(s):  
M. Elumalai ◽  
C. Antunes ◽  
L. Guilhermino
Keyword(s):  
Carcinus Maenas ◽  
River Estuary ◽  
Nw Portugal ◽  
Minho River

scholarly journals Natural heavy metal and metalloid concentrations in sediments of the Minho River estuary (Portugal): baseline values for environmental studies

2012 ◽  
Vol 185 (7) ◽  
pp. 5937-5950 ◽  
Author(s):  
M. Mil-Homens ◽  
A. M. Costa ◽  
S. Fonseca ◽  
M. A. Trancoso ◽  
C. Lopes ◽  
...  
Keyword(s):  
Heavy Metal ◽  
River Estuary ◽  
Environmental Studies ◽  
Minho River ◽  
Baseline Values

scholarly journals Equídeos gravados no curso inferior do Rio Mouro, Monção (NW Portugal). Análise preliminar

2020 ◽  
pp. 631-644
Author(s):  
Luís Coutinho ◽  
Ana M. S. Bettencourt ◽  
Hugo Aluai Sampaio
Keyword(s):  
River Basin ◽  
Physical Characteristics ◽  
The South ◽  
Nw Portugal ◽  
Minho River

This paper focuses on the representation of horses graved on rocks in the Mouro River basin (NW Portugal), an afluent in the south margin of the Minho River. The objectives are the study of its distribution in space, in relation to physical characteristics; the specificity of types of graved horses; the characteristics of the rocks graved by group of horses; the orientation of horses by type and their disposition in the rock compared to other graved motifs.

scholarly journals THE IMPORTANCE OF TAXONOMY ON BASE SCIENCE

2021 ◽  
pp. 36-43
Author(s):  
Nuno Gomes ◽  
Dimítri De Araújo Costa ◽  
Harold Cantallo ◽  
Carlos Antunes
Keyword(s):  
Iberian Peninsula ◽  
Species Identification ◽  
River Estuary ◽  
Distribution Data ◽  
Central Component ◽  
Biological Surveys ◽  
Minho River ◽  
Taxonomic Approach ◽  
Cascade Effects ◽  
Scientific Collections

Although species identification is a central component on Biological Sciences, misidentifications are quite common generating error cascade effects on other environmental studies, resulting on erroneous population estimates, status, trends, and distribution data. One of the main causes of these errors occurs when dealing with damaged material, immature specimens, sexual dimorphism, intraspecific variation, and species with poor or outdated descriptions. Furthermore, usually there is no material retained as voucher of the specimens studied in scientific collections, hindering confirmation the identified species, in morphoanatomical and genetic scope. Even with this reliance on species identification taxonomy has been in decline for many years. In this study, we present the case study of the crustaceans identified for the Minho River estuary (NW Iberian Peninsula), using a taxonomic approach comparing these results with the biological surveys obtained through various ecology studies performed for 4 decades. A total of 64 species of crustaceans were identified within this study, in which 44 were new records for the Minho River estuary, compared to the 25 species identified on the biological surveys analyzed. Being one of the first studies of this nature in the Minho River, the main objective will be to provide taxonomic support in future projects in this area, contributing to the knowledge of the fauna of Portugal and the Iberian Peninsula.

scholarly journals NUMERICAL MODELS’ APPLICATION FOR MORPHODYNAMICS ASSESSMENT OF CLIMATE CHANGE IMPACTS IN THE MINHO RIVER ESTUARY

2021 ◽  
pp. 1-6
Author(s):  
Willian Melo ◽  
José Pinho ◽  
Isabel Iglesias ◽  
Ana Bio ◽  
Paulo Avilez-Valente ◽  
...  
Keyword(s):  
Climate Change ◽  
Sea Water ◽  
Numerical Models ◽  
Methodological Approach ◽  
River Estuary ◽  
Water Levels ◽  
Roughness Coefficient ◽  
Intergovernmental Panel ◽  
Erosion Risk ◽  
Minho River

The knowledge of physical, biological, and chemical estuarine processes and how they are affected by climate change conditions is essential for improving estuarine management. A common methodological approach for studying these complex processes is based on the implementation of numerical models supported by field data as bathymetry, sediment characteristics, flow discharges, current velocities, and sea water levels. This work is based on the implementation of a numerical model of the Minho River estuary using the Delft3D software. This model is able to simulate hydrodynamic and morphodynamic processes for different time scales. It was calibrated using the OpenDA tool, which automatically determines some of the models’ parameters, such as the tidal constituents and the roughness coefficient, aiming to minimize the error between observed data and simulated results. Different scenarios were considered to assess the effects of climate change, according to the 5th Assessment Report of the Intergovernmental Panel on Climate Change (IPCC). Results showed that the elevation in the estuary mouth can reach 77 cm, depending on the considered scenario. It was also determined that floods are the main sediment transport driver along the estuary, intensifying the accretion processes. Furthermore, the sea-level rise reduces the amount of transported sediments to the coastal platform, increasing the erosion risk in this area and increasing the accretion inside the estuary.

Osmoregulatory plasticity of the glass eel of Anguilla anguilla: freshwater entry and changes in branchial ion-transport protein expression

2004 ◽  
Vol 61 (3) ◽  
pp. 432-442 ◽  
Author(s):  
Jonathan Mark Wilson ◽  
José Carlos Antunes ◽  
Patricío Duro Bouça ◽  
João Coimbra
Keyword(s):  
Ion Transport ◽  
River Estuary ◽  
Anguilla Anguilla ◽  
Chloride Cells ◽  
Concentration Gradients ◽  
Glass Eel ◽  
Ru 486 ◽  
Minho River ◽  
History Of ◽  
Glass Eels

The glass-eel stage of the life history of Anguillid eels (Anguilla spp.) makes the important physiological transition from seawater (SW) to freshwater (FW) osmoregulation. Central to successful adaptation to fresh water is the switch from active hypoosmoregulation (ion excretion) to active hyperosmoregulation (ion uptake) to counter passive fluxes imposed by concentration gradients. Anguilla anguilla (L.) glass eels, captured from the lower Minho River estuary and maintained in brackish water (BW; 24‰), were fully capable of adapting to FW following acute transfer. In a comparison between SW- (34‰) and FW-adapted glass eels, gill Na+/K+-ATPase and Na+:K+:2Cl– cotransporter (NKCC) expression were both markedly reduced in the FW group. Branchial mitochondria-rich chloride cells (MRCs) were also significantly larger in SW-adapted glass eels. Apical CFTR Cl– channel immunoreactivity associated with branchial MRCs was also only present in SW-adapted glass eels. The expression of these three ion-transport proteins is strongly associated with active ion excretion in SW teleost fishes. In FW-adapted glass eels, cortisol treatment increased branchial Na+/K+-ATPase expression but was without effect on NKCC expression. Glucocorticoid receptor blockade by RU-486 had no effect on Na+/K+-ATPase or NKCC expression.

scholarly journals Organic matter sources for tidal marsh sediment over the past two millennia in the Minho River estuary (NW Iberian Peninsula)

2012 ◽  
Vol 53 ◽  
pp. 16-24 ◽  
Author(s):  
J.M. De la Rosa ◽  
M.F. Araújo ◽  
J.A. González-Pérez ◽  
F.J. González-Vila ◽  
A.M. Soares ◽  
...  
Keyword(s):  
Organic Matter ◽  
Iberian Peninsula ◽  
Tidal Marsh ◽  
River Estuary ◽  
Marsh Sediment ◽  
Organic Matter Sources ◽  
The Past ◽  
Minho River

Records from Marsh Foraminifera and Grapevine Growing Season Temperatures Reveal the Hydro-climatic Evolution of the Minho Region (nw Portugal) from 1856–2009

2017 ◽  
Vol 47 (2) ◽  
pp. 208-218 ◽  
Author(s):  
João Moreno ◽  
Francisco Fatela ◽  
Eduardo Leorri ◽  
Filipa Moreno
Keyword(s):  
Tidal Marsh ◽  
Large Scale ◽  
Climatic Variability ◽  
Oscillation Mode ◽  
River Estuary ◽  
Growing Season ◽  
Precipitation Anomaly ◽  
Climatic Conditions ◽  
Low Salinity ◽  
Nw Portugal

Abstract A hydro-climatic reconstruction is proposed for the Minho region (NW Portugal), integrating two different proxies: grape harvest dates (GHD) as a proxy of temperature variations, and benthic marsh foraminifera as a proxy of salinity of sediment interstitial waters. The reconstructed and measured mean maximum temperatures (GSTmax) of grapevine-growing season (March to August) were combined with data on benthic foraminiferal assemblages from the Caminha tidal marsh (Minho River estuary) to characterize the main hydro-climatic episodes in the region during the last 154 years. Results emphasize that, in the brackish setting of the Minho estuary, where foraminiferal species usually associated with low salinity occur, higher GSTmax had an impact on the hydrological balance of the marsh by enhancing evapotranspiration and increasing interstitial salinity. These conditions favored the occurrence of marsh species such as Jadammina macrescens and Trochammina inflata. The influence of the North Atlantic European meteorological teleconnection patterns on recent climatic variability of the Minho region was also examined from 1950–2009. Data support the hypothesis that persistent positive modes of spring-summer Scandinavian Oscillation Mode (SCA) and summer Eastern Atlantic/ Western Russia Oscillation Mode (EA/ WR) patterns triggered lower GSTmax, especially in the 1960s–1980s. Those conditions, in-phase with a positive precipitation anomaly (1958–1983), reduced the Caminha tidal marsh salinity, leading to the increase of low salinity species: Trochamminita salsa/irregularis, Haplophragmoides manilaensis, Miliammina fusca and Miliammina spp. Both proxies provide valuable tools for understanding the interactions between large-scale circulation modes and hydro-climatic conditions at regional and local scales.

scholarly journals Crustaceans (Malacostraca and Thecostraca) from the International Minho River, Iberian Peninsula

Hydrobiology ◽  
2021 ◽  
Vol 1 (1) ◽  
pp. 47-75
Author(s):  
Nuno Gomes ◽  
Dimítri A. Costa ◽  
Harold Cantallo ◽  
Carlos Antunes
Keyword(s):  
Iberian Peninsula ◽  
Sampling Methods ◽  
New Records ◽  
River Estuary ◽  
Species Distributions ◽  
Beam Trawl ◽  
Invertebrate Fauna ◽  
Glass Eel ◽  
Minho River

Crustaceans (Arthropoda) are a diverse and abundant group with chitinous exoskeleton, living on coastal/estuarine environments, at community invertebrate fauna. A survey on the species of some crustacean groups found on the Minho River estuary (international section) in the Iberian Peninsula, is presented with specimens collected through glass eel fishing bycatch, grab sampler, trammel net, beam trawl and fyke net sampling methods. A total of 98 specimens were examined belonging to 7 orders, 21 genera and 23 species (17 new records from Minho River, including one for Portugal). Brief diagnosis, ecological notes, species distributions and figures are provided intending to present taxonomic support on future projects in this region.

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