From coast to slope: Zooplankton communities shift in the Northern Alboran Sea

Ventero, Ana; Iglesias, M.; Miquel, Joan

doi:10.1016/j.ecss.2020.106854

Cited by 5 publications

(8 citation statements)

References 56 publications

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“…In general, for the ten studied GSAs, the ∆MVBS was positive (38 kHz frequency recorded a lower MVBS value than 120 kHz frequency) in the areas closest to the coast, becoming negative (38 kHz frequency recorded a higher MVBS value than 120 kHz frequency) as the distance to the coast and the depth increased. This fact has already been observed in GSA01 and associated with a change in the zooplankton community (Ventero et al 2020). In addition, the ∆MVBS was negative for all GSAs except GSA16, where a community dominated by Fluid-Like organisms presumably dominates (Ballón et al 2011).…”

Section: Resultssupporting

confidence: 60%

First description of the shelf epipelagic plankton layers at a Mediterranean basin-scale

Ventero

Iglesias

Giannoulaki

et al. 2022

Preprint

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This research represents the first approach to the study of the shelf zooplankton community at a Mediterranean scale, using acoustic standardized data collected in June-July in 10 different geographical sub-areas (GSAs) established by the General Fisheries Commission for the Mediterranean (GFCM) within the framework of the MEDiterranean International Acoustic Survey (MEDIAS). The analysis of the zooplankton layers based on their acoustic characteristics has revealed the potential of these surveys for the study of zooplankton at a Mediterranean basin scale and, also, the need to collect biological samples to interpret the acoustic records in terms of species. The fish population’s direct assessment is established in the MEDIAS framework, but the integration of zooplankton community data would constitute a qualitative step for the understanding of the fluctuations of fish populations and therefore to achieve the objective of an ecosystem-based management. Results have revealed the ubiquity of the zooplankton layers and its ability to form layers detectable by scientific echosounders throughout the Mediterranean at the common fish assessment frequency (38 kHz). In addition, the use of two frequencies (38 and 120 kHz) has allowed to apply the dB difference method, observing changes in the difference of the Mean Volume Backscattering Strength (∆MVBS) at 38 and 120 kHz frequencies, which would be related to changes in the composition of the zooplankton community.

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Section: Resultssupporting

confidence: 60%

First description of the shelf epipelagic plankton layers at a Mediterranean basin-scale

Ventero

Iglesias

Giannoulaki

et al. 2022

Preprint

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“…Although acoustic methods do not directly capture species information, the development of multi‐frequency acoustics has allowed us to qualitatively classify different marine organisms based on the strength of their signal scattering at different frequencies (Chu, 2011). For example, the Fluid‐like (FL) class includes copepods, euphausiids, or chaetognaths, and so on, and typically increases from low to high frequency (18–200 kHz) acoustic backscatter, while the Gas‐bearing (GB) class includes adult jellyfish, and fish larvae, and so on, have high backscatter intensity at almost all frequencies (Ventero et al., 2020). The spatial and temporal distribution of DVM and resources of Euphausia pacifica was studied at the bottom of the Yellow Sea Cold Water Mass using a multifrequency echosounder (Kim et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

“…Ventero et al. (2020) used a multi‐frequency echosounder Simrad EK60 and a biological trawl to classify the plankton community from the coastal areas to the continental shelf edge into three categories of plankton communities. In the shelf sea region of the Barents Sea, Skaret et al.…”

Section: Introductionmentioning

confidence: 99%

“…The spatial and temporal distribution of DVM and resources of Euphausia pacifica was studied at the bottom of the Yellow Sea Cold Water Mass using a multifrequency echosounder (Kim et al, 2022). Ventero et al (2020) used a multi-frequency echosounder Simrad EK60 and a biological trawl to classify the plankton community from the coastal areas to the continental shelf edge into three categories of plankton communities. In the shelf sea region of the Barents Sea, Skaret et al (2020) found three different trophic levels of organisms: northern krill (Thysanoessa inermis), capelin (Mallotus villosus), polar cod (Boreogadus saida) based on DVM of predator-prey spatial interactions at short time scales.…”

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confidence: 99%

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Spatial and Temporal Characteristics of Winter Diel Vertical Migration of Zooplankton and Nekton in the East China Shelf Seas Based on Multi‐Frequency Echosounder

Nie,

Li,

Liu

et al. 2023

JGR Oceans

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The diel vertical migration (DVM) of plankton and nekton plays an important role in the energy flow and material cycling of marine ecosystems. Especially in shelf seas, seasonal environmental variations may distinguish DVM characteristics in winter mixed water from summer pattern. Therefore, to investigate the patterns and influencing factors of winter DVM in East China Shelf Seas (ECSS), we carried out comprehensive research based on high‐resolution multi‐frequency acoustic data during the winter of 2019/2020. The results showed that: (a) acoustic and zooplankton sampling data can effectively capture the widely existence of winter DVM of different biological community in ECSS and their spatio‐temporal variabilities. (b) In East China Sea, the migration was mainly dominated by the Gas‐bearing class (GB), which had fast migration speed, compared to the Yellow Sea where the migration was dominated by the Fluid‐like class (FL). In addition, GB descends earlier than FL. (c) For large scale factors, during the full moon, the GB will aggregate deeper and the FL shallower, compared to the new moon, and regional temperature is an important factor affecting the distribution of organisms at meridional direction; for small scale processes, cold and warm currents and ocean fronts can also affect migration behavior. In the muddy area with full moon and spring tide, GB and FL show different inconsistent migration compared to normal relatively consistent pattern. These results will help us to better understand the physiological, ecological and environmental elements that control winter DVM, facilitating the management of ecosystem‐based fisheries resources.

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“…In the western Mediterranean Sea, numerical models have found the highest concentrations along the Catalan coast and most abundant across this region between 20 and 30 m depth (Soto-Navarro et al, 2020). Taking this into account, it is essential to quantify these items, mainly because zooplankton aggregation layers and krill-like aggregation areas constitute the main feeding grounds for pelagic fish inhabiting the continental shelf of the Mediterranean Sea, which can be clearly detected during the day by echo sounders (Ventero et al, 2019(Ventero et al, , 2020 and diurnal vertical migrations of pelagic fish may play a crucial factor in vertical transport and mixing processes, which is a current knowledge gap (Van Sebille et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Anthropogenic particles in the zooplankton aggregation layer and ingestion in fish species along the Catalan continental shelf

Compa

Alomar

Ventero

et al. 2022

Estuarine, Coastal and Shelf Science

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From coast to slope: Zooplankton communities shift in the Northern Alboran Sea

Cited by 5 publications

References 56 publications

First description of the shelf epipelagic plankton layers at a Mediterranean basin-scale

First description of the shelf epipelagic plankton layers at a Mediterranean basin-scale

Spatial and Temporal Characteristics of Winter Diel Vertical Migration of Zooplankton and Nekton in the East China Shelf Seas Based on Multi‐Frequency Echosounder

Anthropogenic particles in the zooplankton aggregation layer and ingestion in fish species along the Catalan continental shelf

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