Estuarine mesozooplankton dynamics on a short-term time scale: role of semidiurnal tidal cycle

Menéndez, María Clara; Hoffmeyer, Mónica S.; Sassi, M.G.

doi:10.1590/s1679-87592011000300009

Cited by 6 publications

(7 citation statements)

References 18 publications

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“…Our findings clearly demonstrate the strong effect of the tidal cycle on short-term variations in the mesozooplankton community in both channels of BBE. Similar results have been reported for the main channel of this estuary by MENÉNDEZ et al (2011MENÉNDEZ et al ( , 2012 and GARIBOTTI (unpublished data). However, we found, as expected, a different vertical distribution pattern of mesozooplankton during the tidal cycle in the two smaller channels from that of the main channel.…”

Section: Discussionsupporting

confidence: 91%

Tidal effects on short-term mesozooplankton distribution in small channels of a temperate-turbid estuary, Southwestern Atlantic

et al. 2015

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The short-term variability of mesozooplankton distribution and physicochemical variables was examined in two different channels of the Bahía Blanca Estuary, Argentina, during two tidal cycles. All the physicochemical measurements and mesozooplankton sampling were performed at a fixed site during approximately 22-23 h at 3-h intervals. Pumps were used to obtain surface and bottom mesozooplankton samples and the water speed of each stratum was measured with an Acoustic Doppler Current Profiler (ADCP). In all, 23 mesozooplanktonic taxa belonging to four phyla (Arthropoda, Annelida, Echinodermata and Chordata) were identified. The most abundant taxa during the two tidal cycles were Balanus glandula larvae, Eurytemora americana and Acartia tonsa. A discernible variability in the water conditions and vertical mesozooplankton distribution (VMD) different from that known for the estuary's main channel, was found in the other two selected channels. VMD varied during the tidal cycle in both channels in accordance with the channel's geomorphology and water dynamic characteristics of each of them. The variation of the abundance of the different taxa during ebb and flood currents might indicate the existence of a tidal vertical migration of the mesozooplankton as a response to particular dynamic water conditions. A variação de curto prazo da distribuição do mesozooplâncton e das variáveis físico-químicas foi examinada em dois diferentes canais do Estuário de Bahia Blanca, Argentina, durante dois ciclos de maré. As medidas físico-químicas e a amostragem do zooplâncton foram realizadas em dois locais fixos durante aproximadamente 22-23 horas, com intervalos de 3 horas. Bombas foram utilizadas para obter amostras de zooplâncton na superfície e no fundo e a velocidade da água em cada estrato foi medida com o Perfilador Acústico de Corrente (ADCP). Ao todo, foram identificados 23 taxa mesozooplanctônicos pertencentes a 4 filos (Arthropoda, Annelida, Echinodermata e Chordata). Os grupos mais abundantes durante os dois ciclos de maré foram larvas de Balanus glandula, além de Eurytemora americana e Acartia tonsa. Nos dois canais selecionados foi identificada uma variação nas condições da água e na distribuição vertical do mesozooplâncton (DVZ) diferente daquela conhecida para o canal principal do estuário. DVZ variou durante o ciclo de maré em ambos os canais de acordo com a geomorfologia e características da dinâmica das águas existente em cada um deles. A variação na abundância dos diferentes taxa durante as marés vazante e enchente poderia estar indicando a existência de migração vertical do mesozooplâncton em resposta a uma determinada condição dinâmica da água. AbstrAct

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Section: Discussionsupporting

confidence: 91%

Tidal effects on short-term mesozooplankton distribution in small channels of a temperate-turbid estuary, Southwestern Atlantic

et al. 2015

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“…In coincidence with our results, the abundance in the channel margin was markedly higher during ebb tide than during flood, low or high tide events (Menéndez et al, 2011). Interestingly, A. tonsa abundances in the central zone of the main channel were of similar magnitude throughout the tidal cycle and they did not report an increase during the ebb (Menéndez et al, 2011). Thus, the increase of the abundance during the ebb only in the channel margin may be associated with a lateral movement of this species to avoid the net outflow at time (Menéndez al., of whether such a retention mechanism operates A. tonsa in the Bahía Blanca Estuary awaits further studies not only considering another sampling stations but also complementary observations related to behaviour of individual copepods species.…”

Section: Acartia Tonsa Maintenance In the Inner Zone Of The Bahía Bla...supporting

confidence: 92%

“…In a study closely related to this, Menéndez et al ( 2011) compared the mesozooplankton distribution between two zones: the northern margin, which coincide exactly with our fixed station, and the deeper central zone of the main channel (approximately 200 m away from our fixed sampling site). In coincidence with our results, the abundance in the channel margin was markedly higher during ebb tide than during flood, low or high tide events (Menéndez et al, 2011). Interestingly, A. tonsa abundances in the central zone of the main channel were of similar magnitude throughout the tidal cycle and they did not report an increase during the ebb (Menéndez et al, 2011).…”

Section: Acartia Tonsa Maintenance In the Inner Zone Of The Bahía Bla...supporting

confidence: 90%

“…Considering that our fixed sampling site coincides with the northern margin of the Principal Channel, the increase of the abundance during the ebb may be associated with a lateral movement of this species to areas of decreased flushing such as channel margins. This option has been suggested for different copepod species in order the net flow the (Cronin et al, 1962;De Pauw, 1973;Roddie et al, 1984;Castel and Veiga, 1990;Menéndez et al, 2011), but there are few data illustrating this. In a study closely related to this, Menéndez et al ( 2011) compared the mesozooplankton distribution between two zones: the northern margin, which coincide exactly with our fixed station, and the deeper central zone of the main channel (approximately 200 m away from our fixed sampling site).…”

Section: Acartia Tonsa Maintenance In the Inner Zone Of The Bahía Bla...mentioning

confidence: 99%

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Short-term variability on mesozooplankton community in a shallow mixed estuary (Bahía Blanca, Argentina): Influence of tidal cycles and local winds

Menéndez¹,

Hoffmeyer²

2012

Estuarine, Coastal and Shelf Science

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“…The greater proportion of zooplankton near the surface would reduce the advective losses and may be associated with a mechanism or strategy to avoid outward advection by bottom currents during the receding tide. This option has been suggested for some copepod species to resist the seaward net flow during the ebb (Castel and Veiga, 1990;Cronin, Daiber, and Hulbert, 1962;Menéndez et al, 2011;Roddie, Leakey, and Berry, 1984).…”

Section: Seasonal Analysis: Spm Pom Chl-a and Zooplankton Abundancementioning

confidence: 99%

Seasonal and Tidal Dynamics of Water Temperature, Salinity, Chlorophyll-a, Suspended Particulate Matter, Particulate Organic Matter, and Zooplankton Abundance in a Shallow, Mixed Estuary (Bahía Blanca, Argentina)

Menéndez

Delgado

Berasategui

et al. 2016

Journal of Coastal Research

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Menéndez, M.C.; Delgado, A.L.; Berasategui, A.A.; Piccolo, M.C., and Hoffmeyer, M.S., 0000. Seasonal and tidal dynamics of water temperature, salinity, chlorophyll-a, suspended particulate matter, particulate organic matter, and zooplankton abundance in a shallow, mixed estuary (Bahía Blanca, Argentina). Journal of Coastal Research, 00(0), 000-000. Coconut Creek (Florida), ISSN 0749-0208.Estuaries are characterized by a variety of interrelated, abiotic and biotic, structural components and intensive physical, chemical, and biological processes. The aim of this study was to investigate the seasonal-and tidal-mediated variability in water temperature, salinity, suspended particulate matter (SPM), particulate organic matter (POM), chlorophyll-a (Chl-a), and zooplankton abundance in the Bahía Blanca estuary, Argentina. The underlying mechanisms responsible for the observed variability are also discussed. Sampling was carried out every two months (December 2004-April 2006 during 14-h tidal cycles in a fixed station located in the inner zone of the estuary. Vertical profiles of temperature and salinity and water samples were obtained at the surface and the bottom to determine SPM, POM, Chl-a, and zooplankton. SPM (97.3 6 6.9 mg L À1 ) showed a strong seasonality, mainly attributed to biological activity. POM concentration (1539 6 107.6 mgC m À1 ) was high, possibly derived from vascular plants and benthic microalgae. Chl-a (6.91 6 0.73 mg m À3 ) and zooplankton (2024.23 6 9.16 individuals m À3 ) also showed a seasonal pattern, with higher concentrations in the summer. During the tidal cycle, the highest amounts of the measured variables were observed during the ebb tide. The results highlight the strong variability in the physicochemical and biological variables at different time scales in mesotidal, temperate estuaries. It is essential to take into account this variability in any monitoring program performed in a temperate system dominated by such a tidal regime.

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Estuarine mesozooplankton dynamics on a short-term time scale: role of semidiurnal tidal cycle

Cited by 6 publications

References 18 publications

Tidal effects on short-term mesozooplankton distribution in small channels of a temperate-turbid estuary, Southwestern Atlantic

Tidal effects on short-term mesozooplankton distribution in small channels of a temperate-turbid estuary, Southwestern Atlantic

Short-term variability on mesozooplankton community in a shallow mixed estuary (Bahía Blanca, Argentina): Influence of tidal cycles and local winds

Seasonal and Tidal Dynamics of Water Temperature, Salinity, Chlorophyll-a, Suspended Particulate Matter, Particulate Organic Matter, and Zooplankton Abundance in a Shallow, Mixed Estuary (Bahía Blanca, Argentina)

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