Mesozooplankton Structure and Seasonal Dynamics in Three Coastal Systems of Argentina: Bahía Blanca Estuary, Pirámide Bay, and Ushuaia Bay

Berasategui, Anabela A.; Abbate, María Celeste López; D'agostino, Valeria Carina; Presta, María Laura; Uibrig, Román Armando; García, Tami Mailén; Nahuelhual, Eugenia Gabriela; Chazarreta, Carlo Javier; Dutto, M. Sofía; Garcia, Maximiliano Darío; Capitanio, Fabiana L.; Hoffmeyer, Mónica S.

doi:10.1007/978-3-319-77869-3_16

Cited by 5 publications

(8 citation statements)

References 67 publications

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“…In addition, this relationship has also been suggested between surf-and adjacent neritic coastal waters (<50 m; Menéndez et al, 2019). In the study area, the abundances of common taxa were similar or slightly higher than those reported in the nearby estuary (Table 1; e.g., Berasategui et al, 2018;Menéndez et al, 2012), emphasizing the importance of surf waters as a habitat rather than being used as a transient area between the estuary and offshore environments. Surprisingly, the composition of zooplankton in the MH surf zone was similar to that in the BBE two decades ago (Hoffmeyer, 2004).…”

Section: Understanding the Role Of The Surf Waters Of Monte Hermoso B...supporting

confidence: 76%

“…that the BBE populations probably belong to a different lineage (a) (b) (Drillet et al, 2008), which may have gained tolerance to higher salinity levels over the generations (the salinity range of the estuary is 27-36; Berasategui et al, 2018). In the study area, the salinity values were consistently higher than 32.9, indicating the high salinity tolerance of A. tonsa and the presence of well-established populations with slow progressive transformations of their physiological tolerances (Cervetto et al, 1999).…”

Section: Holoplankton In Surf Zone Watersmentioning

confidence: 83%

“…Only a few studies recorded higher meroplankton abundances: up to 1000 ind m −3 in North Carolina, USA (Stull et al, 2016) and the Rio Grande do Soul, Brazil (Rodrigues et al, 2019). In the nearby estuary, the meroplankton is generally represented by decapods, cirripeds, polychaetes, and mollusks, the Decapoda being the most abundant group during summer (Berasategui et al, 2018; Table 1). The The ecological significance of planktonic larvae is, therefore, very relevant considering that they are a dispersal stage for benthic organisms, that determine the potential of the species to colonize adjacent habitats (Shanks, 2009).…”

Section: Meroplankton In Surf Zone Watersmentioning

confidence: 99%

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Holoplankton and meroplankton communities in surf zone waters of a temperate SW Atlantic sandy beach: Seasonal patterns

2023

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Sandy beaches and their associated surf zones are the most common type of open shoreline, with significant ecological and socio‐economic importance. In this study, we explored the seasonal fluctuations of the surf zone holo‐ and meroplankton communities to understand the underlying environmental variables driving the temporal dynamics of each community. We also defined a surf‐zooplankton community on a temperate sandy beach (Monte Hermoso, Argentina) and related the organisms to those reported in a nearby estuary for a better understanding of the connection between adjacent coastal ecosystems. Holoplankton was very abundant (13.52–11070.4 ind m−3) and showed a strong seasonality, mainly related to the specific pattern of the two most abundant species: Acartia tonsa (>autumn) and Paracalanus parvus (>winter). This community was affected by seasonal changes in water temperature and salinity and variations in the velocity of currents, which showed that hydrodynamic forces were more significant on a short‐term time scale than seasonal ones. Meroplankton abundances (1.3–48.05 ind m−3) were significantly lower than those recorded for the holoplankton and were mainly dominated by Medusae and larvae of Bivalvia and Decapoda. This fraction also showed a clear seasonal pattern (>abundances in summer), primarily related to the seasonal changes in temperature. The abundances of the main surf‐zooplanktonic taxa were high and constant, emphasizing the importance of these waters as habitats for well‐established communities rather than being used as a transient area. Consequently, we proposed a “specific” surf‐zooplankton community for a temperate sandy beach, considering resident and non‐resident taxa. Finally, the comparison of the surf and estuarine communities indicated a faunal relationship between seascapes, highlighting the ecological role of coastal waters in planktonic life.

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Section: Understanding the Role Of The Surf Waters Of Monte Hermoso B...supporting

confidence: 76%

Section: Holoplankton In Surf Zone Watersmentioning

confidence: 83%

Section: Meroplankton In Surf Zone Watersmentioning

confidence: 99%

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Holoplankton and meroplankton communities in surf zone waters of a temperate SW Atlantic sandy beach: Seasonal patterns

2023

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“…m −3 , being this copepod the predominant holoplanktonic species of BBE (Berasategui et al, 2018). This species is found in the water column throughout the year, with a maximal abundance during the warm season (austral summer: December to March,) and minimal abundance during the cold season (austral winter: June to August) (Berasategui et al, 2018). In particularly, A. tonsa was the most abundant (4342±3197 ind.…”

Section: Materials and Methods Study Areamentioning

confidence: 99%

“…The incubations were carried out in a culture chamber for 72 hours at 18±1 °C, salinity of 32±2, and ~16 hours light (Berasategui et al, 2018). Aeration with bubble air was provided into the culture medium to avoid the decrease of oxygen.…”

Section: Laboratory Proceduresmentioning

confidence: 99%

Size-fractionated chitin contribution to seston, with linkages to the copepod Acartia

Biancalana

Berasategui

2020

Ocean Coast. Res.

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Size-fractionated chitin contribution to seston, with linkages to the copepod Acartia The main purpose of the present work was to determine chitin from experimental size-fractioned incubations of the copepod Acartia tonsa, considered one of the primary sources of chitin in the Bahía Blanca Estuary. Sampling was performed during the austral warm season at one station in 2014 and 2015. Field-collected females (200 individuals) and males (100 individuals) were incubated in 8 L containers in the laboratory simulating in situ environmental conditions of temperature and salinity for 72 hours. Chitin content was measured in different size fractions (20-60, 60-135 and ≥135 μm). Particulate organic matter and dry weight were also determined in the different size fractions. Highly agglutinated debris, pellets, and natural food (diatoms and tintinnids) were observed in the 20-60 μm size fraction, with a maximum of 0.68±0.21mg L-1 chitin, and the highest contribution of chitin to POC (34.62±18.50 %). Eggs, nauplii and natural food (diatoms and tintinnids) were observed in the 60-135 μm size fraction, with a maximum of 0.20±0.12 mg L-1 chitin and a contribution to POC of 9.80±5.00 %. Acartia adults and their exuviae were observed in the ≥135 μm size fraction, with a maximum concentration of chitin of 0.67±0.40, and a maximum contribution of chitin to POC TS of 30.47±27.23 %. Differences were detected between the different fractions in chitin, POC and DW, indicating that the 20-60 and ≥135 µm size fractions were both an important contribution of chitin in the experiment. Our results suggest that pellets, carcasses and exuviae along with natural food and organic aggregates were the main source of chitin in this system.

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Long-term monitoring of southern right whale feeding behavior indicates that Península Valdés is more than a calving ground

et al. 2023

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Mesozooplankton Structure and Seasonal Dynamics in Three Coastal Systems of Argentina: Bahía Blanca Estuary, Pirámide Bay, and Ushuaia Bay

Cited by 5 publications

References 67 publications

Holoplankton and meroplankton communities in surf zone waters of a temperate SW Atlantic sandy beach: Seasonal patterns

Holoplankton and meroplankton communities in surf zone waters of a temperate SW Atlantic sandy beach: Seasonal patterns

Size-fractionated chitin contribution to seston, with linkages to the copepod Acartia

Long-term monitoring of southern right whale feeding behavior indicates that Península Valdés is more than a calving ground

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