Seasonal variations of the thermohaline structure in the Magdalena-Almejas Bay lagoon system and adjacent sea

Abstract

C M INTRODUCTION The Magdalena-Almejas Bay coastal lagoon system consists of three bodies of water: Almejas Bay (AB), Magdalena Bay (MB), and the channel zone (CZ). They are interconnected by two channels, known as the Gaviotas Channel and the San Carlos Channel (fig. 1a). The AB inlet is INTRODUCCIÓN El sistema lagunar de Bahía Magdalena-Bahía Almejas está morfológicamente compuesto por tres cuerpos de agua: Bahía Almejas (BA), Bahía Magdalena (BM) y zona de canales (ZC). Los tres cuerpos de agua se interconectan mediante dos canales interiores, referidos como Canal San Seasonal variations of the thermohaline structure in the Magdalena-Almejas Bay lagoon system and adjacent sea Variaciones estacionales de la estructura termohalina en el sistema lagunar de Bahía Magdalena-Bahía Almejas y el mar adyacente

Sponge–rhodolith interactions in a subtropical estuarine system

“…However, at Bahia Magdalena, these sponges were rarely observed in other hard substrates such as mangrove roots, rocky platforms or sandy flats. The low presence of sponges in these other substrates could be due to the large tidal range observed within this system (up to 2.3 m during spring tide) (Zaitsev et al 2010). Only Mycale cf.…”

Abundance patterns of early stages of the Pacific sardine (<i>Sardinops sagax</i>) during a cooling period in a coastal lagoon south of the California Current

“…However, the correlations between spawning products and nutrient and CHL concentrations were not significant. This seems reasonable because spawning takes place mainly from January to March before the onset of the intense coastal upwelling in April and May (Zaytsev et al 2003(Zaytsev et al , 2010) that leads to a peak in CHL (Cervantes-Duarte et al 2007 and phytoplankton (Gárate-Lizárraga and SiqueirosBeltrones 1998).…”

“…In this study, sardine eggs and larvae were more abundant in non-stratified waters, although this was not statistically significant, probably because larvae occurred at stations both close to the bay entrance and in stable and shallow waters inside the bay. Intense coastal upwelling takes place in spring (Zaytsev et al 2003(Zaytsev et al , 2010 so that sardines are caught mainly in spring and summer in BM (Félix-Uraga et al 2007), but they do not spawn inside the bay due to the high water temperatures reached in summer (>25.0°C) (Funes-Rodríguez et al 2007). This implies that the high seasonal variability in sardine egg and larval abundance in BM is mainly related to temperature and the migratory movements of different stocks.…”

“…Integrated vertical plankton tows were not possible due to equipment limitations. However, high velocities that were measured and modeled (up to 1.1 m/s) suggest a well-mixed water column during the flood, when a strong tidal flow produced intense vertical mixing of near-bottom cold water with upper layer water, which led to reduced SST values (Zaytsev et al 2010). Sam-Samples were preserved in 4% formalin with sodium borate as buffer.…”

Occurrence of Holacanthus clarionensis (Pomacanthidae), Stegastes leucorus, and Stegastes acapulcoensis (Pomacentridae) at Magdalena Bay, B.C.S., Mexico

“…The Magdalena-Almejas Bay complex is one of Mexico's largest lagoon systems, recognized as a Region for Conservation Priority due to its large fishing production, the representation of multiple habitats, significant fish and bird diversity, and for being an important breeding zone for gray whales and sea turtles (Galván-Magaña et al 2000;Gardner & Chávez-Rosales 2000;Zarate-Ovando et al, 2006). This particular region has been widely reported to be an important transition zone (an ecotone) between temperate and tropical environments, and represents one of the southernmost regions still under the influence of the California Current, where the outermost part of the bay is constantly influenced by upwelling events (Álvarez-Borrego et al, 1975;Zaitsev et al, 2010).…”