Variabilidad hidrográfica en Bahía de La Paz, Golfo de California, México (1995-2005)

Obeso-Nieblas, Maclovio; Shirasago‐Germán, Bernardo; Gaviño-Rodríguez, Juan Heberto; Pérez‐Lezama, Edgar Leonardo; Obeso-Huerta, Hipólito; Jiménez-Illescas, Ángel R.

doi:10.4067/s0718-19572008000300015

Cited by 30 publications

(25 citation statements)

References 10 publications

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“…Regarding the possible first crustacean host of the parasite in this zone, Valles-Vega (2014) Previous studies in Bahía de La Paz showed that surface water temperature varies during the annual cycle from a minimum average of 20.5°C in winter to an average maximum of 31°C in summer, not significantly varying until 100 m depth (Obeso-Nieblas et al 2008, Guevara-Guillén et al 2015. Salinity shows minimal annual changes depending on river inputs and evaporation, ranging between averages of 34.5 ‰ in winter and 39 ‰ in summer (Chávez-Sánchez 2012).…”

Section: Discussionmentioning

confidence: 96%

Early development and life cycle of Contracaecum multipapillatum s.l. from a brown pelican Pelecanus occidentalis in the Gulf of California, Mexico

Valles-Vega¹,

Molina-Fernández²,

Benı́tez³

et al. 2017

Dis. Aquat. Org.

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Section: Discussionmentioning

confidence: 96%

Early development and life cycle of Contracaecum multipapillatum s.l. from a brown pelican Pelecanus occidentalis in the Gulf of California, Mexico

Valles-Vega¹,

Molina-Fernández²,

Benı́tez³

et al. 2017

Dis. Aquat. Org.

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“…1). This is the largest (80 km long and 35 km wide) and deepest (down to 450 m) coastal lagoon in the Gulf of California (Obeso‐Nieblas et al. 2008).…”

Section: Methodsmentioning

confidence: 99%

Epibiotic traits of the invasive red seaweed Acanthophora spicifera in La Paz Bay, South Baja California (Eastern Pacific)

et al. 2012

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The aim of this study was to analyze the interaction of a non‐native macroalga (Acanthophora spicifera) with native macroalgae (Sargassum spp.) and sponge assemblages in a subtropical embayment of the Mexican Pacific. The intensity of A. spicifera epiphytism on the native seaweed Sargassum varied significantly over time and was inversely related to the Sargassum density and size. The higher intensity (up to 28 individuals per host plant) occurred when Sargassum was smaller and was lower in density (senescence period). The lower intensity was recorded during the growth period of Sargassum and the subsequent increase in intensity was attributed to a high fragmentation period of A. spicifera, which was evidenced by a decrease in its average size and biomass and by the presence of larger free‐floating accumulations on the subtidal zone. The facultative interaction between A. spicifera and Sargassum appears to be neutral, as no negative or positive effects were found for epiphytic or basibiont seaweeds. However, this invasive seaweed characteristically monopolizes almost all types of hard substrate, and its effects on other algae and benthic organisms should be investigated. Moreover, A. spicifera was often epizoic on epilithic sponges. This invasive seaweed was found anchored on the sponge tissue by rhizome‐like structures. In addition, free‐floating fronds of A. spicifera were frequently found carrying small pieces of the basibiont sponge in its basis (60% of them with eggs and embryos), which suggests a novel facilitation mechanism for some sponge species, as the A. spicifera epizoism could favor fragmentation, dispersal and recruitment of these invertebrates. This study shows that A. spicifera is not only a species that adapts rapidly to the new conditions of the receiving environment but, due to its epibiotic traits, it can directly interact with and influence the life histories of some native species.

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“…Hydrographic conditions in the bay, particularly in deeper areas, are strongly influenced by the seasonal variability of main thermohaline circulation of the southern Gulf of California [28]. Salinity ranges between 34 and 36 depending on the time of the year [29]. In particular, the deeper layers, are more influenced by the Gulf of California, while shallower ones are dominated by local processes like insolation, evaporation, precipitation and mixing [30].…”

Section: Study Areamentioning

confidence: 99%

“…In particular, San Lorenzo channel can show a vertical and horizontal variability of the water column caused by a combinations of events that generate a highly dynamical habitat. Among them, upwelling of colder waters from the Gulf of California can cause localized phytoplanktonic blooms [31, and references therein], and strong tidal currents [32] can transport sediments from the bottom and enhance turbidity of the bottom layers of the water column (Author, FF, pers. obs.…”

Section: Study Areamentioning

confidence: 99%

4SM Method Tested in the Gulf of California Suggests Field Data are Not Needed to Derive Satellite Bathymetry

Favoretto¹,

Morel²,

A³

et al. 2017

Preprint

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Satellite derived bathymetry methods over coastal areas were born to deliver basic and useful information like bathymetry. However, the process is not straightforward, the main limitation being the need of field data. The Self-calibrated Spectral Supervised Shallow-water Modeler (4SM) method was tested to obtain coastal bathymetry without the use of any field data. Using LANDSAT-8 multispectral images from 2013 to 2016, a bathymetric time series was produced. Groundtruthed depths and an alternative method, Stumpf's Band Ratio Algorithm, were used to verify the results. Retrieved (4SM) vs groundtruthed depths scored an average r2 (0.90), and a low error (RMSE = 1.47 m). Also 4SM showed, over the whole time series, the same average accuracy of the control method (40%). Advantages, limitations and operability under complex atmosphere and water column conditions, and high and low-albedo bottom processing capabilities of 4SM are discussed. In conclusion, the findings suggest that 4SM is equally accurate as the commonly used Stumpf's method, the only difference being the independence of 4SM to previous field data, and the potential to deliver bottom spectral characteristics for further modelling. 4SM represents a significative advance in coastal remote sensing potential to obtain bathymetry and optical properties of the marine bottom.

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Variabilidad hidrográfica en Bahía de La Paz, Golfo de California, México (1995-2005)

Cited by 30 publications

References 10 publications

Early development and life cycle of Contracaecum multipapillatum s.l. from a brown pelican Pelecanus occidentalis in the Gulf of California, Mexico

Early development and life cycle of Contracaecum multipapillatum s.l. from a brown pelican Pelecanus occidentalis in the Gulf of California, Mexico

Epibiotic traits of the invasive red seaweed Acanthophora spicifera in La Paz Bay, South Baja California (Eastern Pacific)

4SM Method Tested in the Gulf of California Suggests Field Data are Not Needed to Derive Satellite Bathymetry

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