Publicacións

@article{Anta2013233,

title = {Effects of density and size distribution on the erosion of the adult cockle Cerastoderma edule [Efecto de la densidad de población y la distribución de tallas en la erosiońn de berberechos Cerastoderma edule adultos]},

author = {Jose Anta-Álvarez and Enrique Peña-González and Jerónimo Puertas-Agudo},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879169029&doi=10.3989%2fscimar.03754.27A&partnerID=40&md5=3a1ad4416bbf5013a4126707f8c4801f},

doi = {10.3989/scimar.03754.27A},

issn = {02148358},

year  = {2013},

date = {2013-01-01},

urldate = {2013-01-01},

journal = {Scientia Marina},

volume = {77},

number = {2},

pages = {233-245},

abstract = {A series of experimental flume experiments were carried out to evaluate the passive transport of the adult cockle Cerastoderma edule with shell sizes from 15 to 35 mm. The purpose of the study was to measure the erosion of this bivalve under controlled laboratory conditions, reproducing the current velocities and the cockle size distribution found at the Lombos do Ulla river mouth in Spain during high river discharges. Increasing velocities (0.29, 0.31, 0.35, 0.40, 0.44 and 0.47 m s-1) were applied to the bivalves, analysing the influence of population density (500 and 1000 ind. m-2), activity (live vs dead individuals), and mollusc size and distribution. To assess the effect of bivalve size distribution on the cockle transport, uniform and non-uniform cockle size distributions were tested. The particle image velocimetry technique and the double-averaged methodology were used to determine velocity fields during the experiments. In the experiments cockle erosion rates were found to be directly related to the flow velocity and inversely related to the population density. The erosion behaviour of uniform and graded cockle size distributions showed differences similar to those found in the bedload transport of uniform and non-uniform sediment mixtures. Our results provide a mechanism to explain the observed physical transport of bivalve populations after large storm events.},

note = {cited By 1},

keywords = {bivalve; current velocity; erosion; flume experiment; population density; river discharge; size distribution, Bivalvia; Cerastoderma edule; Mollusca, Galicia [Spain]; Ria de Arosa; Rias Bajas; Spain; Ulla Estuary},

pubstate = {published},

tppubtype = {article}

}

@article{Anta2013189,

title = {A bedload transport equation for the Cerastoderma edule cockle},

author = {Jose Anta-Álvarez and Enrique Peña-González and Jerónimo Puertas-Agudo and Luis Cea-Gómez},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872278028&doi=10.1016%2fj.jmarsys.2012.10.014&partnerID=40&md5=0d221ba3a33524bca596eff2b6df1847},

doi = {10.1016/j.jmarsys.2012.10.014},

issn = {09247963},

year  = {2013},

date = {2013-01-01},

urldate = {2013-01-01},

journal = {Journal of Marine Systems},

volume = {111-112},

pages = {189-195},

abstract = {Hydrodynamics play an important role in the structure of many marine ecosystems of bivalves. After severe storm periods, large amounts of the Cerastoderma edule stocks were transported from the Lombos do Ulla shellfish bed (Spain). This paper presents the results of laboratory experiments carried out to analyze the bedload transport of this bivalve emulating the stormy shellfish bed conditions. Flow velocities were measured using particle image velocimetry and the double averaged methodology was applied to determine the main flow characteristics over different cockle patches. The flow structure exhibits properties of skimming and isolated flows depending on the density of bivalves. Bed shear stress was determined from the log-law and the cockles were geometrically characterized in order to derive specific bedload transport equations in a conventional deterministic sediment transport framework. The obtained formulas can be implemented in common numerical codes to further analyze mollusk stability, bedload transport and dispersal in their aquatic systems. © 2012 Elsevier B.V.},

note = {cited By 7},

keywords = {Bed-load transport; CITEEC; DA; Double averaged methodology; Flume; Marine mollusk; Particle image velocimetries; PIV; RMS, bedload; bivalve; dispersal; ecosystem structure; flow structure; flow velocity; hydrodynamics; imaging method; laboratory method; sediment transport; shear stress, Bivalvia; Cerastoderma edule; Mollusca, Flow visualization; Imaging techniques; Sediment transport; Storms; Velocimeters; Velocity measurement, Shellfish, Spain},

pubstate = {published},

tppubtype = {article}

}