Laura Sanvicente‐Añorve

Universidad Nacional Autónoma de México

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César Flores-Coto

Universidad Nacional Autónoma de México

Miguel Alatorre-Mendieta

Universidad Nacional Autónoma de México

Elia Lemus-Santana

Universidad Nacional Autónoma de México

Margarita Hermoso‐Salazar

Universidad Nacional Autónoma de México

Marina Sánchez-Ramírez

Instituto Politécnico Nacional

María Ana Fernández-Álamo

Universidad Nacional Autónoma de México

Marco Violante-Huerta

Universidad Nacional Autónoma de México

Mitzi Sánchez‐Campos

Universidad Nacional Autónoma de México

Aurora Marrón-Becerra

Universidad Nacional Autónoma de México

Claudia Alba

Universidad Nacional Autónoma de México

Cooperative Institutions

Universidad Nacional Autónoma de México

Institut de Ciències del Mar

Centre National de la Recherche Scientifique

Consejo Superior de Investigaciones Científicas

Université de Lille

Center for Scientific Research and Higher Education at Ensenada

Universidad Autónoma Metropolitana

Sistema Nacional de Investigadores

Universidad Autónoma de la Ciudad de México

Laboratoire d’Océanologie et de Géosciences

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Encounters in the Zooplankton: Implications for Pelagic Ecosystem Dynamics

InTech eBooks (2018)

Laura Sanvicente‐Añorve Miguel Alatorre-Mendieta

Many important phenomena in the plankton are driven by encounters among individuals. These encounters are mediated by the relative motion of zooplankters, either through the swimming ability of organisms, the small-scale hydrodynamic turbulence, or both. Through selected case studies, in this chapter, we illustrate how encounter rates influence the predator-prey interactions and reproduction, two of the major processes regulating the zooplankton population dynamics. Estimations on the encounter rates among zooplankters were made on the basis of the Gerritsen-Strickler and Rothschild-Osborn models, which consider non-turbulent and turbulent conditions, respectively. In a first case, we show how the predatory impact of siphonophores is over the fish larvae, in the southern Gulf of Mexico. In the absence of water turbulence, a predator encounters 38–40 prey in a day at surface waters, but under the influence of the wind, encounters can increase between 1.2 and 3.3 times depending on the wind velocity and prey speed. In a second case, we examined the encounters between a copepod predator and a cladoceran prey, the dominant groups in the meromictic lagoon of Clipperton atoll. Here, a predator can encounter a high number of prey (until 441) in a day, due to the high density of prey. Turbulence conditions enhance encounter rates, but even if encounters are high, it does not mean that a predator can ingest a high number of prey. In a third case, we analyzed the mate encounters of the holoplanktonic mollusk Firoloida desmarestia from the southern Gulf of Mexico, throughout an annual cycle. Results indicated that May is the high reproductive season, a period where a female can encounter 17 males in a day, under turbulent conditions. As F. desmarestia is a low abundant species, the role of wind-induced turbulence proved to be highly important in increasing encounters between mates. These case studies illustrate the importance of encounters among zooplankters in the growth and maintenance of populations in the plankton. Future field and experimental studies are needed to achieve a better understanding of the pelagic ecosystem dynamics.

Gelatinous zooplankton

10.5772/intechopen.70662

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Citations (0)

Is the ‘muddy heterogeneous sediment assemblage’ an ecotone between the pebbles community and the Abra alba community in the southern bight of the North Sea?

Netherlands Journal of Sea Research (1992)

J.-M. Dewarumez Dominique Davoult Laura Sanvicente‐Añorve Serge Frontier

Ecotone

Assemblage (archaeology)

10.1016/0077-7579(92)90061-i

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Citations (20)

Changes in pelagic Polychaete assemblages along the California current system

Springer eBooks (2003)

María Ana Fernández-Álamo Laura Sanvicente‐Añorve Miguel Alatorre-Mendieta

10.1007/978-94-017-0655-1_31

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Citations (7)

Connectivity and larval dispersal pathways of Panulirus argus in the Gulf of Mexico: A numerical study

Journal of Sea Research (2019)

Julio Antonio Lara-Hernández Jorge Zavala‐Hidalgo Laura Sanvicente‐Añorve Patricia Briones‐Fourzán

Propagule

Eddy

10.1016/j.seares.2019.101814

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Citations (18)

The holoplanktonic Mollusca from the southern Gulf of Mexico. Part 1: heteropods

Cahiers de biologie marine (2014)

Elia Lemus-Santana Laura Sanvicente‐Añorve Margarita Hermoso‐Salazar César Flores-Coto

Cette etude documente la distribution verticale et horizontale des Mollusques heteropodes dans la zone epipelagique neritique du sud du Golfe du Mexique. Les echantillons de plancton ont ete preleves a 28 stations au sud du parallele 18°N, la zone la plus meridionale du Golfe du Mexique, durant les mois de mai et novembre 1995. 187 echantillons ont ete recoltes a cinq intervalles de profondeur de la colonne d'eau (0-6, 6-12, 12-18, 45-55 et 95-105 m) avec un filet ouvrant-fermant de 75 cm de diametre et 505 μm de vide de maille. Quatorze especes de Mollusques heteropodes ont ete identifiees ; les especes dominantes, expliquant 97% de l'abondance totale, etaient Atlanta lesueurii (60%), A. gaudichaudi (15%), Firoloida desmarestia (12%) et A. selvagensis (10%). Dans la colonne d'eau, leurs densites plus elevees ont ete enregistrees dans la couche de 0-18 m. Saisonnierement, seule A. gaudichaudi a enregistre son abondance la plus elevee en novembre. Nous suggerons que les variations saisonnieres de dominance des especes d'heteropodes pourraient etre une strategie ecologique permettant d'eviter la competition pour les ressources alimentaires. Le carinariide Carinaria challengeri est signale pour la premiere fois en Atlantique occidental. Nous donnons egalement une documentation detaillee sur la distribution mondiale des 14 especes d'heteropodes identifiees dans cette etude.

Dominance (genetics)

10.21411/cbm.a.97709f44

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Citations (6)

Variación estacional y nictímera en la distribución del zooplancton dominante en una laguna costera tropical

Revista de biología marina y oceanografía (2018)

Ángeles Mecalco-Hernández Manuel Castillo‐Rivera Laura Sanvicente‐Añorve César Flores-Coto Carlos Ãlvarez-Silva

El zooplancton dominante de la laguna La Mancha, Veracruz, México, fue analizado con el objetivo de evaluar su variabilidad estacional y nictímera, así como la influencia que sobre él ejercen las principales variables ambientales. De mayo 2012 a abril 2013, cada mes se realizó un ciclo de 24 h, tomando muestras cada 4 h, en la boca de la laguna. Simultáneamente a la toma de muestras de zooplancton, se registraron parámetros ambientales in situ como la temperatura, oxígeno disuelto, salinidad, clorofila a y número de células fitoplanctónicas. Se capturaron 54 taxa (principalmente del holoplancton) y 10 de ellos fueron considerados dominantes (abundancia total > 0,5%). La comunidad estuvo dominada por dos especies de copépodos (Acartia tonsa y Pseudodiaptomus pelagicus), así como por larvas zoea de braquiuros (~85%). La abundancia total del zooplancton mostró pulsos significativos a lo largo del año, uno en febreromarzo dominado por copépodos y otro en septiembre-octubre, dominado por larvas de decápodos. A pesar de que la abundancia total del zooplancton fue mayor en la noche, sólo P. pelagicus, anfípodos, megalopas y otras larvas de decápodo fueron significativos durante este período. De acuerdo con un Análisis de Correspondencia Canónica, el estado de la boca (abierta/cerrada), número de cianofitas y precipitación fueron los factores ambientales más importantes en la determinación de la abundancia del zooplancton dominante

Acartia tonsa

10.4067/s0718-19572018000100039

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Citations (3)

Distribución y diversidad de apendicularias en el sur del golfo de México

Revista Mexicana de Biodiversidad (2010)

César Flores-Coto Laura Sanvicente‐Añorve Marina Sánchez-Ramírez

The diversity and distribution of appendicularians on the continental shelf and upper part of the oceanic sea in the southern Gulf of Mexico is analyzed here for the first time. Samples were collected in September 2003 using a fine mesh net. Twenty species were identified, of which Fritillaria venusta and Pelagopleura oppressa are fi rst records for the Gulf of Mexico. Oikopleura species occur throughout the area, with greatest abundances in the upwelling waters of the inner shelf off Yucatán and Campeche. The greatest abundances of Fritillaria species and of the other genera were recorded in the mid, outer shelf, and oceanic areas of Campeche and Tabasco that are influenced by continental water discharges and an oceanic gyre. Diversity and abundance varied in differing directions, with high abundance and low diversity characterizing the costal areas and low abundance and high diversity in the mid, outer shelf, and oceanic areas. The distribution of appendicularian species appears to be influenced by upwelling currents, gyres, water column depth, continental water discharges, salinity, and temperature. However, it could be assumed that the reasons behind these physical environmental factors include the food supply, a short life cycle, and high reproductive efficiency, factors that are commonly associated with distribution.

10.22201/ib.20078706e.2010.001.192

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Citations (5)

Siphonophores off a riverine system in the southern Gulf of Mexico: factors affecting their distribution and spatial niche breadth and overlap

Aquatic Ecology (2008)

Laura Sanvicente‐Añorve Claudia Alba César Flores-Coto Manuel Castillo‐Rivera

Mesopelagic zone

Temperature salinity diagrams

10.1007/s10452-008-9172-0

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Opisthobranch Assemblages from a Coral Reef System: The Role of Habitat Type and Food Availability

Bulletin of Marine Science (2012)

Laura Sanvicente‐Añorve Margarita Hermoso‐Salazar Jazmín Ortigosa Vivianne Solís‐Weiss Elia Lemus-Santana

The present study examines how the habitat type and food availability influence the small scale distribution and assemblages of opisthobranch species in the National Park Arrecife Alacranes, the largest coral reef system in the southern Gulf of Mexico. Samples were collected during December 2009, and April and September 2010 over different habitats (green, red, and brown algae, seagrass meadows, drifting Sargassum spp., rocks, corals, and sand). In total, 32 species were identified and a multidimensional scaling (MDS) analysis based on the Bray-Curtis similarity index was used to determine the main opisthobranch assemblages. The degree of association between the habitat type and the species composition was tested by a chi-square test and the significance of its value was determined by Monte Carlo randomizations. MDS results defined four faunal associations (algal, Thalassia, Sargassum, and rocky assemblages), which showed a significant relationship between the composition of opisthobranch species and the habitat type. These results suggest that food supplies and feeding strategies play a dominant role in the coexistence of species and their small-scale spatial distribution within the reef. The algal assemblage, the group with the highest species richness, was mainly composed of herbivores inhabiting several types of benthic algal communities, whereas the Sargassum assemblage, was a less diversified group comprised of carnivores feeding on epibiont hydroids and was well adapted to the pelagic environment. The distribution of the opisthobranchs over the different habitats largely reflected the variety and availability of their food items.

10.5343/bms.2011.1117

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Holoplanktonic polychaetes from the Gulf of Tehuantepec, Mexico

Cahiers de biologie marine (2005)

María Ana Fernández-Álamo Laura Sanvicente‐Añorve

Composition, abundance, and main assemblages of holoplanktonic polychaetes were analysed in the Gulf of Tehuantepec. This Gulf, in Mexican waters of the eastern tropical Pacific, is a very productive system due to an upwelling during the winter. Zooplankton samples were taken over a station grid covering and waters during March and November 1978. Most species showed their highest densities in the region. In the western Gulf, the area sam- pled in both seasons, mean polychaete abundance was higher in November (549.2 ind.1000 m-3) than in March (143.8 ind.1000 m-3). A regression tree analysis showed that pH and dissolved oxygen were the main factors affecting the total polychaete abundance over the study area during March. Identified families were: Lopadorhynchidae (88.8%), Alciopidae (6.6%), Iospilidae (2.8%), Tomopteridae (1.1%) and Typhloscolecidae (0.7%). The dominant species, Pelagobia longicir- rata, accounted for 86.5% of the total polychaete abundance. A Bray-Curtis analysis identified two main polychaete assem- blages during March: oceanic and neritic. Species richness and mean polychaete abundance were higher in the oceanic assemblage, and P. longicirrata, Plotohelmis capitata, Rhynchonerella gracilis and Lopadorhynchus henseni were the most frequent and abundant species in this assemblage. In the neritic assemblage, the iospilids Phalacrophorus uniformis and Iospilus phalacroides registered the highest relative abundance. It is suggested that the structure of holo- planktonic polychaete assemblages could be determined by the feeding habits of the species and their tolerance to the varia- bility in environmental conditions. Resume : La composition, l'abondance et les principaux assemblages de polychetes holoplanctoniques du Golfe de Tehuantepec sont analyses. Ce Golfe, situe dans les eaux mexicaines de l'est du Pacifique tropical, est un systeme tres pro- ductif en raison d'un upwelling hivernal. Le zooplancton a ete echantillonne sur un quadrillage couvrant les eaux neritiques et oceaniques en mars et novembre 1978. Les plus fortes densites sont obtenues dans la region pour la plupart des especes. Dans la partie ouest du Golfe, region echantillonnee pendant les deux saisons, l'abondance moyenne des poly- chetes est plus elevee en novembre (549,2 ind.1000 m -3 ) qu'en mars (143,8 ind.1000 m -3 ). L'analyse par arbres de regres- sion montre que le pH et l'oxygene dissous sont les principaux facteurs affectant l'abondance totale des Polychetes sur la zone d'etude en mars. Les familles identifiees sont: Lopadorhynchidae (88,8%), Alciopidae (6,6%), Iospilidae (2,8%), Tomopteridae (1,1%) et Typhloscolecidae (0,7%). L'espece dominante, Pelagobia longicirrata, represente 86,5% de l'a- bondance totale. Une analyse de Bray-Curtis permet d'identifier deux principaux assemblages en mars: un assemblage oceanique et un assemblage neritique. La richesse specifique et l'abondance moyenne des polychetes sont plus elevees dans l'assemblage oceanique, P. longicirrata, Plotohelmis capitata, Rhynchonerella gracilis et Lopadorhynchus henseni sont les especes les plus frequentes et les plus abondantes de cet assemblage. Les plus fortes abondances relatives des

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