On the horizontal distribution of marine phytoplankton on an intermediate scale (1 to 10 km), as illustrated by an example from the upwelling area of NW Africa

18 pages, 4 figures, 2 tables[EN] Plankton is essentially variable in time and space. The results of the oceanographic cruises provide information on large scale distributions, but not on small scale patterns that are most important for the understanding of the workings of the pelagic ecosystem. [...] Cyanophyceae, Oscillatoria thiebautii, Richelia intracellularis, Flagellatae, Dinoflagellatae, Prorocentrum micans, Peridinium cf. trochoideum, Ceratium furca, Prorocentrum obstusidens, Peridinium sp., Peridinium brochi, Diplopsalis asymmetrica, Exuviaella baltica, Ceratium tripos, Mesoporos adriaticus, Mesoporos perforatus, Prorocentrum rostratum, Gyrodinium fusiforme, Ceratium fusus, Gymnodinium splendens, Peridinium oceanicum, Dinophysis sacculus, Peridinium conicum, Peridinium steinii, Peridinium depressum, Dinophysis cf. okamurai, Ceratium massiliense, Exuviaella vaginula, Ceratium kofoidii, Gymnodinium sp., Peridinium diabolus, Peridinium oblongum, Dinophysis caudata, Peridinium leonis ?, Ceratium trichoceros, Ceratium azoricum, Peridinium claudicans, Gonyaulax sp., Oxtoxum scolopax, Prorocentrum triestinum, Peridinium punctulatum, Coccolithophoraceae, Coccolithus huxleyi, Helicosphaera sp., Coccolithus pelagicus, Cyclococcolithus fragilis, Syracosphaera pl. sp., Silicoflagellatae, Dictyocha fibula, Dictyocha speculum, Ebria tripartita, Bacillariophyta, Actinocyclus subtilis, Rhizosolenia stolterfothii, Nitzschia seriata, Thalassionema nitzschioides, Nitzschia delicatissima, Thalassiosira sp., Chaetoceros sp., Nitzschia closterium, Rhizosolenia imb. + shrubsolei, Rhizosolenia delicatula, Navicula sp., Leptocylindrus danicus, Hemiaulus membranaceus, Tropidoneis cf. elegans, Coscinodiscus sp., Rhizosolenia alata, Stauroneis membranacea, Chaetoceros socialis, Chaetoceros compressus, Rhizosolenia fragilissima, Eucampia cornuta, Eucampia zoodiacus, Thalassiothrix longissima, Rhizosolenia hebetata, Stephanopyxis palmeriana, Streptotheca tamesis, Biddulphia mobiliensis, Ditylum brightwelli, Climacodium frauenfeldianum, Guinardia flaccida, Rhizosolenia alata indica, Rhizosolenia sp., Nitzschia sp., Chaetoceros affinis, Chaetoceros decipiens, Chaetoceros curvisetus, Rhizosolenia robusta, Skeletonema costatum, Chaetoceros brevis, Navicula wawrikae, Schroederella delicatula, Cerataulina pelagica, Asteromphalus arachne, Actinoptychus senarius, Raphidiella sp. ? [...][ES] El plancton es esencialmente variable en el tiempo y en el espacio. Los procedimientos seguidos habitualmente en las expediciones oceanográficas permiten describir la distribución del plancton a grandes rasgos, pero no bastan para definir las estructuras importantes en la comprensión del funcionamiento del ecosistema pelágico. [...]Peer reviewe