Variability of phytoplankton biomass and environmental drivers in a semi-enclosed coastal ecosystem (San Matías Gulf, Patagonian Continental Shelf, Argentina) using ocean color remote sensing (MODIS) and oceanographic field data: Implications for fishery resources

Patterns and Trends in Chlorophyll‐a Concentration and Phytoplankton Phenology in the Biogeographical Regions of Southwestern Atlantic

“…However, Williams et al. (2021) found a similar pattern to the one observed in our work for R2, in the inner section of the Gulf of San Matías. According to Williams et al.…”

Phytoplankton dynamics based on satellite inherent optical properties and oceanographic conditions in a patagonian gulf frontal system in relation to the adjacent continental shelf waters

“…In the case of the SSMG and GSJ windows, they showed broad annual variability with a high peak also in November (aphy443 = 0.04-0.08 m -1 , Chla-sat = 3.46-4.39 mg m -1 ) and low values in winter (August, 0.02 m -1 ; 1.00 mg m -1 ), fitting to the unimodal function using either aphy443 or Chla-sat parameters (r 2 ~ 0.7, Supplementary Materials, Table I and II), in agreement with previous studies using shorter time series (2003( -2009( , Williams et al, 2018a. Particularly in the SSMG window, moderate values there were sustained during summer-early autumn (from February to April: 0.04± 0.005 m-1; 1.33±0.01 mg m -1 ) probably due to the continuous injection of nutrients leading by the interaction of tidal currents with the topography (Williams et al, 2013(Williams et al, , 2021. This feature can be observed to some extent within SJG also explained by a permanent income of nutrient through the mouth.…”

“…After this first inspection and taking into consideration prior research in the area (Williams et al, 2018a(Williams et al, , 2021Amoroso and Gagliardini, 2010), the study system was partitioned into 5 windows: Península Valdés (PV, 9x9 pixels), Punta Norte (PN, 6x5 pixels), south of SMG (SSMG, 7x6 pixels), and western and eastern domains of SJG (WD and ED respectively, 4x3 pixels) (Fig. 1a).…”

“…The Patagonian Continental Shelf (PCS) has been described as one of the most productive areas of the world's oceans in terms of phytoplankton biomass (Rivas et al, 2006;Romero et al, 2006). In this region, the analysis of the spatio-temporal variability of Chla concentration through ocean colour satellite images allowed to characterize climatological regions (Andreo et al, 2016;Rivas et al, 2006;Glembocki et al, 2015;Williams et al, 2021) and quantify its primary production (Dogliotti et al, 2014;Segura et al, 2013;Lutz et al, 2010). Likewise, the performance of standard chlorophyll-a algorithms has been evaluated, observing an acceptable performance in open waters (Dogliotti et al 2009) and very low in coastal ones (Williams et al, 2013;Delgado et al, 2019).…”

Patterns and trends in Chlorophyll-a concentration and phytoplankton phenology in the biogeographical regions of Southwestern Atlantic

“…Phenological patterns described for this region agree with previous findings in San Matías Gulf, two phytoplankton biomass patterns were observed: one representing the inner waters, where two blooms were described (autumn-spring), associated with seasonal stratification of the water manuscript submitted to Journal of Geophysical Research: Oceans column in spring, and bloom decay through summer as a result of nutrient limitation and a maximum in autumn due to a high concentration of nutrients linked to the beginning of the vertical homogenization of the water column; and the mid-shelf waters pattern, where one main bloom with low variability related to the vertical mixing in water column in the coastal areas and light and nitrate availability, developed in late-autumn in the N section and in spring in the S section (Williams et al, 2021). Meanwhile, El Rincón even presents a salinity and a thermal front generated by bathymetry changes and dilution effects, combined with the northern advection of San Matías Gulf waters (Lucas et al, 2005;Rivas and Pisoni, 2010), no clear seasonality of in situ phytoplankton concentration has been reported in this area (Delgado et al, 2015).…”