Community Structure and Spatiotemporal Dynamics of the Zooplankton in the South Brazilian Bight: A Review

NogueiraJr., Miodeli; Brandini, Frederico Pereira

doi:10.1007/978-3-319-77869-3_8

Cited by 8 publications

(3 citation statements)

References 93 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Falkland Shelf ecosystem and the South Brazil Bight ecosystem share some similarities in terms of structure and presence of keystone species. They display in fact a high productivity and host a small number of key species, which act as bottlenecks to energy circulation and play a critical role in maintaining the overall health and productivity of the ecosystem (Nascimento et al ., 2011; Nogueira and Brandini, 2018). The Falkland Shelf ecosystem is characterized by complex hydrodynamics, including the Falkland Current and the Antarctic Circumpolar Current, resulting in upwelling nutrients and therefore high productivity (Vivier and Provost, 1999; Agnew, 2002; Belkin et al ., 2009; Matano et al ., 2010; van der Grient et al ., 2023).…”

Section: Discussionmentioning

confidence: 99%

Unveiling the wasp-waist structure of the Falkland shelf ecosystem: the role of Doryteuthis gahi as a keystone species and its trophic influences

Büring,

van Der Grient,

Pierce

et al. 2024

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

The Falkland Shelf is a highly productive ecosystem in the Southwest Atlantic Ocean. It is characterized by upwelling oceanographic dynamics and displays a wasp-waist structure, with few intermediate trophic-level species and many top predators that migrate on the shelf for feeding. One of these resident intermediate trophic-level species, the Patagonian longfin-squid Doryteuthis gahi, is abundant and plays an important role in the ecosystem. We used two methods to estimate the trophic structure of the Falkland Shelf food web, focusing on the trophic niche of D. gahi and its impacts on other species and functional groups to highlight the importance of D. gahi in the ecosystem. First, stable isotope measurements served to calculate trophic levels based on an established nitrogen baseline. Second, an Ecopath model was built to corroborate trophic levels derived from stable isotopes and inform about trophic interactions of D. gahi with other functional groups. The results of both methods placed D. gahi in the centre of the ecosystem with a trophic level of ~ 3. The Ecopath model predicted high impacts and therefore a high keystoneness for both seasonal cohorts of D. gahi. Our results show that the Falkland Shelf is not only controlled by species feeding at the top and the bottom of the trophic chain. The importance of species feeding at the third trophic level (e.g. D. gahi and Patagonotothen ramsayi) and observed architecture of energy flows confirm the ecosystem's wasp-waist structure with middle-out control mechanisms at play.

show abstract

Section: Discussionmentioning

confidence: 99%

Unveiling the wasp-waist structure of the Falkland shelf ecosystem: the role of Doryteuthis gahi as a keystone species and its trophic influences

Büring,

van Der Grient,

Pierce

et al. 2024

J. Mar. Biol. Ass.

View full text Add to dashboard Cite

show abstract

“…On the Continental Shelf of Maranhão State, oceanographic agents, such as the flow of the São Marcos and São José bays, can influence the distribution of nutrients, thus becoming a fundamental element for the maintenance of plankton communities throughout the three areas of study. According to Nogueira Júnior and Brandini (2018), plankton production tends to be more influenced by the oligotrophic tropical water of the Brazilian Current, similar to what occurs with the Northern Current of Brazil, which in turn is enriched by the advection of the central water of the South Atlantic, which is rich in nutrients.…”

Section: Discussionmentioning

confidence: 98%

Characterization of the zooplankton in the continental shelf of the Brazilian Equatorial Atlantic

Nunes¹,

Cutrim²,

Díaz³

et al. 2023

Bol. Inst. Pesca

View full text Add to dashboard Cite

The equatorial Atlantic is characterized by its high abundance of zooplankton. However, starting point studies concerning the species composition in the northern Brazilian continental shelf are still scarce. Species cataloging studies can help to know the diversity of this ecosystem and, consequently, develop conservation studies and strategies for natural resources management. Thus, this work aims to characterize the species composing the zooplanktonic communities present on the continental shelf of Maranhão. Ninety-six taxa distributed among the Radiolaria, Myozoa, Foraminifera, Cnidaria, Mollusca, Annelida, Arthropoda, Bryozoa, Chaetognatha, Echinodermata, Chordata, and other groups, were recorded. The composition of mesozooplankton showed a wide distribution, indicating that the species are finding the appropriate conditions for their development.

show abstract

“…Low salinity Río de la Plata plume (RPP) waters (ca. 25000 m 3 s −1 ; Hoffmeyer et al ., 2018) are advected beyond the estuary's mouth and reach maximum northeastern penetration (up to 1000 km) during winter (Piola et al ., 2008). This buoyant plume adds hydrographic complexity and makes this an important biogeographic boundary between communities of coastal-brackish, oceanic subtropical and subantarctic origins (Boltovskoy et al ., 1999).…”

Section: Introductionmentioning

confidence: 99%

Microzooplankton community structure in a subtropical South-West Atlantic coastal site

2023

View full text Add to dashboard Cite

The microzooplankton community structure (species abundance, biomass, diversity) was investigated at a coastal marine station on the South-West Atlantic Ocean (34°23′S–53°45′W, Uruguay). This is a hydrographically complex site within the Subtropical Convergence zone of the SW Atlantic where knowledge of the microzooplankton is particularly scant. The main goal was to perform a first characterization of that community and evaluate its association to environmental drivers along an annual cycle. Oceanographic variables (temperature, salinity, irradiance, nutrients, chlorophyll-a) and ciliates (aloricate and loricate), and dinoflagellates were recorded monthly from July 2019 to June 2020. Over 100 microzooplankton taxa belonging to approximately 30 families and 40 genera were identified, including several subtropical and subantarctic species. Community structure followed wide transitions at the seasonal scale – particularly between summer and winter as subtropical taxa alternated with euryhaline taxa from colder subantarctic waters. The core environmental variables (temperature, salinity and dissolved inorganic nitrogen [DIN]) explained overall variance in microzooplankton community assembly. During summer, high temperatures (20.3, 16.3–22.4°C) and low nutrients (DIN: 3.5, 0.7–6.7 μM; PO4: 1.0, 0.8–1.5 μM) benefited the development of aloricate ciliates. A nutrient pulse in winter posed favourable stoichiometric conditions and the numerical abundance was dominated by dinoflagellates and loricate ciliates in the following months, while diversity remained highest (taxonomic richness: 36 [22–46]; Shannon–Wiener index: 2.5 [1.9–2.8]). Results suggested that the microzooplankton community at the study site is mainly structured by hydrographic variability linked to the seasonal replacement of offshore water masses that differed in thermohaline properties and nutrient levels, and local processes.

show abstract

Community Structure and Spatiotemporal Dynamics of the Zooplankton in the South Brazilian Bight: A Review

Cited by 8 publications

References 93 publications

Unveiling the wasp-waist structure of the Falkland shelf ecosystem: the role of Doryteuthis gahi as a keystone species and its trophic influences

Unveiling the wasp-waist structure of the Falkland shelf ecosystem: the role of Doryteuthis gahi as a keystone species and its trophic influences

Characterization of the zooplankton in the continental shelf of the Brazilian Equatorial Atlantic

Microzooplankton community structure in a subtropical South-West Atlantic coastal site

Contact Info

Product

Resources

About