The mesozooplankton of the Patos Lagoon Estuary, Brazil: trends in community structure and secondary production

Teixeira-Amaral, Priscila; Amaral, W. J. A.; Ortiz, Danielle Ortiz de; Agostini, Vanessa Ochi; Muxagata, Erik

doi:10.1080/17451000.2016.1248850

Cited by 27 publications

(13 citation statements)

References 36 publications

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“…Thus, we question which environmental factors may have contributed to C. fallax population increase and what impacts it may cause. It occurred over three consecutive summers in the present study, but was mainly captured in summer 2012 (.16,000 medusae), which coincides with the swarm recorded from Patos Lagoon, 500 km south (Teixeira-Amaral et al, 2017); also suggesting that the changes reported here may not be restricted to PES. A hypothesis for the simultaneous occurrence of C. fallax swarms in these Brazilian estuaries may be related to large inter-annual variations in river discharge, circulation and salinization processes associated with ENSO events.…”

Section: R E S U L T S a N D Discussionsupporting

confidence: 88%

“…Although speculative, it is not unlikely that C. fallax is an introduced species considering that along with its recent discovery, all sites with known populations are brackish water environments near ports (e.g. Vanhöffen, 1911;Picard & Rahm, 1954;Kramp, 1959;Teixeira-Amaral et al, 2017;this study), and the high national and international ship traffic in PES could be a potential vector, along with other cnidarian and noncnidarian exotic species (e.g. Neves & Rocha, 2008;Van Ofwegen & Haddad, 2011;Haddad et al, 2014;Bettim & Haddad, 2017).…”

Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

“…It is difficult to explain the reasons for such a replacement in the dominant species, particularly due to the poor historical knowledge of the Brazilian hydromedusan fauna, but unexpected high abundances of C. fallax have also recently been recorded at Patos Lagoon (Teixeira-Amaral et al, 2017). Considering that the presence of C. fallax in the south-western Atlantic has only recently been detected, and now is known to occur in many estuaries along Brazilian coast between 24 and 348S (Teixeira-Amaral et al, 2017;; present study), two mutually excluding hypotheses may be proposed:…”

Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

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Biodiversity of planktonic hydrozoans from a subtropical estuary: evidence of assemblage structure change

et al. 2018

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The present study provides a comprehensive survey of the planktonic hydrozoan fauna from the Paranaguá Estuarine System (PES; southern Brazil, 25°S 48°W), a subtropical estuary considered a Natural World Heritage site by UNESCO. Extensive collections were performed throughout the estuary in five sampling campaigns during the summer and winter periods of 2012 and 2013 and summer of 2014, totalling 185 samples. About 49,000 organisms were analysed which together with the few previous records resulted in a total of 36 hydromedusae and three siphonophore species. We highlight the presence of Cnidostoma fallax in high abundance (>19,000 individuals captured; ~40% of all planktonic hydrozoans). The high abundance of this species throughout three consecutive summers suggests a change in the local assemblage structure, since previous reports in the 1980s, 1990s and 2000s had shown Liriope tetraphylla recurrently as the dominant species which now ranks fourth. It is difficult to ascertain the causes of such changes due to the paucity of previous studies on Brazilian estuaries, but one possibility is that C. fallax has been recently introduced. In any case, the high dominance of this hydromedusa was not expected and this scenario would potentially cause changes in the local food web since C. fallax and L. tetraphylla are quite different morphologically and ecologically and thus probably play different trophic roles. Future studies are necessary to check the long-term permanency of C. fallax and to assess its biology and ecology and the impact of this assemblage change on the ecosystem.

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Section: R E S U L T S a N D Discussionsupporting

confidence: 88%

Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

Section: R E S U L T S a N D Discussionmentioning

confidence: 99%

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Biodiversity of planktonic hydrozoans from a subtropical estuary: evidence of assemblage structure change

et al. 2018

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“…En la laguna La Mancha, del total de individuos contabilizados, los copépodos fueron el grupo dominante (>60%), coincidiendo con lo expuesto en otros estudios, donde se menciona que generalmente éste es el grupo dominante dentro de las comunidades zooplanctónicas (Johnson & Allen 2012). Dentro de los copépodos, las especies Acartia tonsa y Pseudodiaptomus pelagicus, ambas consideradas como estuarinas (Rhyne et al 2009), fueron las más abundantes, lo cual también es relativamente común para muchos otros estuarios y áreas costeras (Marques et al 2006, Modéran et al 2010, Liu et al 2017, Teixeira-Amaral et al 2017.…”

Section: Discussionunclassified

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

Mecalco-Hernández

Castillo-Rivera

Sanvicente‐Añorve³

et al. 2019

Rev. biol. mar. oceanogr.

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The dominant zooplankton of the La Mancha lagoon, Veracruz, Mexico, was analyzed with the objective of evaluating its seasonal and diel variability, as well as the influence of the main environmental variables on this variability. From May 2012 to April 2013, every month a 24-h cycle was completed, taking samples every 4 h, at the mouth of the lagoon. Simultaneously with zooplankton sampling, in situ environmental parameters such as temperature, dissolved oxygen, salinity, chlorophyll a and number of phytoplankton cells were recorded. We collected 54 taxa (mainly holoplankton) and 10 of them were considered dominant (total abundance > 0.5%). The zooplankton community was dominated mainly by two species of copepods (Acartia tonsa and Pseudodiaptomus pelagicus), as well as zoea larvae of brachyura (~85%). At seasonal level, the total abundance of zooplankton showed significant pulses throughout the year, one in February-March dominated by copepods and another in September-October, dominated by decapod larvae. On a diel scale, although total zooplankton abundance was significantly higher at night, only P. pelagicus, amphipods, megalopae, and other decapod larvae showed significant differences at this level. According to a Canonical Correspondence Analysis, the mouth stage (open/close), the number of cyanophytes and precipitation were the most important environmental factors in determining the abundance of the dominant zooplankton.

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“…However, due to methodological constraints, little information is available about the zooplankton secondary production, especially with continuous measurements over time. In this TI, Teixeira-Amaral et al (2017) present results of monthly measurements of zooplankton secondary production over four years at two stations in the PLE and identify large changes in the secondary production levels related to modifications in the hydrology. The highest secondary production values (1.17 mg C m −3 day −1 ) are mainly associated with the calanoid copepod Acartia tonsa Dana, 1849 in salt/brackish water.…”

Section: Editorialmentioning

confidence: 99%

Biota of the Patos Lagoon estuary and adjacent marine coast: long-term changes induced by natural and human-related factors

Odebrecht

Secchi

Abreu

et al. 2017

Marine Biology Research

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The mesozooplankton of the Patos Lagoon Estuary, Brazil: trends in community structure and secondary production

Cited by 27 publications

References 36 publications

Biodiversity of planktonic hydrozoans from a subtropical estuary: evidence of assemblage structure change

Biodiversity of planktonic hydrozoans from a subtropical estuary: evidence of assemblage structure change

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

Biota of the Patos Lagoon estuary and adjacent marine coast: long-term changes induced by natural and human-related factors

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