Temporal and Spatial Variation of Frondose Benthic Seaweeds in La Paz Bay, B. C. S., Mexico

Cruz-Ayala, M. B.; Casas-Valdez, Ma. M.; Ortega‐García, Sofia

doi:10.1515/botm.1998.41.1-6.191

Cited by 18 publications

(12 citation statements)

References 11 publications

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“…The only other papers that described the seasonality of C. sertularioides from south-eastern Baja California (Casas Valdez et al, 1997;Cruz-Ayala et al, 1998 were based on seasonal surveys done in La Paz Bay in 1993. However, those papers described such annual cycle in con£icting ways, which prevents any useful comparison with this study.…”

Section: Discussionmentioning

confidence: 99%

“…Thus, population ecological studies for this species could serve as a basis for making ecological and evolutionary comparisons between geographically distant regions. This paper analyses interannual di¡erences of the population abundance of C. sertularioides from south-eastern Baja California, Mexico, where this species is frequent (Casas Valdez et al, 1997;Cruz-Ayala et al, 1998Paul-Cha¨vez & Riosmena-Rodr|¨guez, 2000). Then, it is important to undertake ecological research speci¢cally on C. sertularioides populations.…”

Section: Introductionmentioning

confidence: 99%

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Population dynamics of Caulerpa sertularioides (Chlorophyta: Bryopsidales) from Baja California, Mexico, during El Niño and La Niña years

Scrosati¹

2001

J. Mar. Biol. Ass.

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This study monitored the abundance of the tropical/subtropical seaweed Caulerpa sertularioides (Chlorophyta: Bryopsidales) from a sandy beach from Balandra Cove, on the south-eastern coast of the Baja California Peninsula, Mexico, between April 1998 and April 2000, including consecutive El Nin¬ o and La Nin¬ a events. El Nin ¬ o conditions, indicated by relatively high seawater temperatures, were associated with a high population abundance (April^June 1998), whereas La Nin¬ a conditions, indicated by relatively low temperatures, were associated with the absence of C. sertularioides (April^June 1999 and April 2000). Caulerpa sertularioides was present during other times of the year during the study period, but never with the high abundance reached during El Nin¬ o conditions. Seaweeds of temperate a¤nity occurring in Baja California, such as Gelidium robustum (Rhodophyta: Gelidiales) and Macrocystis pyrifera (Phaeophyceae: Laminariales), decreased sharply in abundance during El Nin¬ o conditions. Therefore, the biogeographic a¤nity of seaweeds from Baja California might be helpful in predicting the e¡ects of El Nin¬ o and La Nin¬ a on their abundance, with implications for resource management and for the prediction of the e¡ects of long-term oceanographic changes on seaweed distribution.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Population dynamics of Caulerpa sertularioides (Chlorophyta: Bryopsidales) from Baja California, Mexico, during El Niño and La Niña years

Scrosati¹

2001

J. Mar. Biol. Ass.

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“…Additionally, 18-30 healthy fronds of nine macroalgal species were detached at the basal holdfast by hand: three green (Caulerpa sertularioides, Codium simulans, and Ulva lactuca), two brown (Dictyota flabellata and Sargassum sinicola), and four red (Gracilaria pachydermatica, Hypnea valentiae, Laurencia papillosa, and Polysiphonia pacifica) macroalgae. These species are among the most abundant in this region, contributing >70 % of the seaweed biomass in Sargassum-dominated communities (Cruz-Ayala et al 1998). All macroalgal species were considered potential food sources.…”

Section: Study Areamentioning

confidence: 99%

Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer

Hernández-Almaraz

Méndez-Rodríguez

Zenteno‐Savín

et al. 2016

Ecological Research

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The aim of the study was to evaluate the dynamic of cadmium, lead, copper, zinc, and iron among lower trophic levels, sea urchins and macroalgae. Diets and isotopic values were used in combination to explore trophic positions and potential transference of metals from primary producers to consumers. Concentrations of trace elements were measured in two species of sea urchin (Tripneustes depressus and Eucidaris thouarsii) and nine macroalgae that are usually used as food in four Sargassum beds, one of which is close to a phosphorite mine. Specimens were collected when Sargassum fronds were at their greatest (winter) and lowest (summer) abundance. Highest concentrations of Cd, and Cu in both urchin species were recorded in winter at the site near the phosphorite mine. Concentrations of Pb in T. depressus were below the detectable limit, whereas E. thouarsii, which in addition to a high concentration of Pb, had high amounts of Cu and Zn. Gut content analysis, indicates that the diet of both sea urchins at the four sites and two collection dates is mainly macroalgae. The δ15N isotopic values in sea urchins in a typical Sargassum bed were in good agreement with a diet dominated by macroalgae, with T. depressus having herbivorous habits and E. thouarsii having omnivorous habits in this environment. We found macroalgae important in the dynamics of metals in food webs, potentially contributing to transferring Cd, Cu, and Zn to key invertebrate species, such as sea urchins, indicating connectivity of food webs and ecological structuring of marine environments.

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“…La Gaviota Island is located to the southeast of La Paz Bay in Baja California Sur (24°17′20″ N, 110°20′30″ W). The island is an exposed site with a pronounced slope and is characterized by steep crags and rocky platforms that extend almost to 50 m. The bottom thereafter, is sandy (Cruz-Ayala et al 1998). The relative humidity is 50% during the day, causing a semidesert climate; the mean annual rainfall is 180 mm and mean annual evaporation is 300 mm.…”

Section: Study Areasmentioning

confidence: 99%

Seasonal variation of the agar quality and chemical composition of Gracilaria veleroae and Gracilaria vermiculophylla (Rhodophyceae, Gracilariaceae) from Baja California Sur, Mexico

Rodríguez-Montesinos

Arvizu-Higuera

Hernández‐Carmona

et al. 2013

Phycological Research

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Summary Yield and physico‐chemical properties of agar from Gracilaria veleroae E.Y. Dawson and Gracilaria vermiculophylla (Ohmi) Papenfuss were studied and the chemical composition of the two seaweeds was determined. Samples were collected seasonally from summer 2003 to spring 2005. The agar yield did not vary significantly between seasons for both species. The lowest agar gel strength was obtained from G. veleroae (207.5 g cm–2) in summer 2003 and the highest from G. vermiculophylla (793.1 g cm–2) in winter 2004. Melting temperatures and hysteresis were higher in G. vermiculophylla, whereas gelling temperatures and 3,6‐anhydrogalactose content were higher for G. veleroae. Moisture, ash, crude fiber, and ether extract showed no significant seasonal variation for G. veleroae. The chemical composition of G. vermiculophylla showed significant seasonal variation. G. vermiculophylla possesses a better agar quality than G. veleroae and is a species that could be considered as a source of agar for commercial use.

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Temporal and Spatial Variation of Frondose Benthic Seaweeds in La Paz Bay, B. C. S., Mexico

Cited by 18 publications

References 11 publications

Population dynamics of Caulerpa sertularioides (Chlorophyta: Bryopsidales) from Baja California, Mexico, during El Niño and La Niña years

Population dynamics of Caulerpa sertularioides (Chlorophyta: Bryopsidales) from Baja California, Mexico, during El Niño and La Niña years

Concentrations of trace elements in sea urchins and macroalgae commonly present in Sargassum beds: implications for trophic transfer

Seasonal variation of the agar quality and chemical composition of Gracilaria veleroae and Gracilaria vermiculophylla (Rhodophyceae, Gracilariaceae) from Baja California Sur, Mexico

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