Deep-water zooplankton in the Mediterranean Sea: Results from a continuous, synchronous sampling over different regions using sediment traps

Danovaro, Roberto; Carugati, Laura; Boldrin, A.; Calafat, Antoni; Canals, Miquel; Fabrés, Joan; Finlay, Kerri; Heussner, Serge; Miserocchi, Stefano; Sánchez-Vidal, Anna

doi:10.1016/j.dsr.2017.06.002

Cited by 15 publications

(9 citation statements)

References 81 publications

(131 reference statements)

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“…In our near-bottom traps, copepods highly dominated among swimmers collected both inside the canyon and over the adjacent open slope, and included planktonic organisms able to perform vertical migrations and to swim actively into the traps as previously found in other geographical areas (Matsuno et al 2014;Makabe et al 2016). Such dominance of copepods in near-bottom zooplankton agrees with previous reports in other areas of Mediterranean Sea like the Ligurian Sea off Nice (Guidi-Cuilvard et al 2009; 2300 m deep), the Balearic Basin (Cartes et al, 2013; 1100 m deep) and the Adriatic Sea (Danovaro et al, 2017; 1050 m deep). However, this pattern contrasts with very recent findings in the Ionian Sea (Danovaro et al, 2017;2250 m deep), that reported dominance of ostracods (80%).…”

Section: Abundance and Composition Of Swimmerssupporting

confidence: 92%

“…Such dominance of copepods in near-bottom zooplankton agrees with previous reports in other areas of Mediterranean Sea like the Ligurian Sea off Nice (Guidi-Cuilvard et al 2009; 2300 m deep), the Balearic Basin (Cartes et al, 2013; 1100 m deep) and the Adriatic Sea (Danovaro et al, 2017; 1050 m deep). However, this pattern contrasts with very recent findings in the Ionian Sea (Danovaro et al, 2017;2250 m deep), that reported dominance of ostracods (80%). In that particular case, high ostracod abundance seemed to be linked to temperature conditions and the scarcity of potential predators (Hydromedusae, Siphonophora).…”

Section: Abundance and Composition Of Swimmerssupporting

confidence: 92%

“…5). The relatively high abundance of infaunal polychaetes (typically sedentary) in traps placed 25 mab, was previously reported in La Fonera Canyon (Sardá et al, 2009) and in the Alboran Sea (Danovaro et al, 2017). Transport processes in a highly turbulent environment, such as strong bottom currents and resuspension events typical of submarine canyon systems, may contribute to explain the presence of infaunal organisms in the traps.…”

Section: Abundance and Composition Of Swimmerssupporting

confidence: 62%

“…Sediment traps have seldom been used to approach biotic processes in the Mediterranean Sea. To the best of our knowledge, there are only two studies dealing with the temporal variability of deep-sea organisms caught in near-bottom sediment traps (Guidi-Guilvard et al, 2009, Danovaro et al 2017). The first one provides relevant data on the temporal variations in organism fluxes and species composition of swimmers collected continuously during more than two years in a single station at the distal part of a submarine canyon, as well as on their relationships with environmental variables (Guidi-Guilvard et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…The first one provides relevant data on the temporal variations in organism fluxes and species composition of swimmers collected continuously during more than two years in a single station at the distal part of a submarine canyon, as well as on their relationships with environmental variables (Guidi-Guilvard et al, 2009). A more recent study (Danovaro et al, 2017) compares shallow and near-bottom zooplankton assemblages in three different geographical sub-basins of the Mediterranean Sea (Danovaro et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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Canyon effect and seasonal variability of deep-sea organisms in the NW Mediterranean: Synchronous, year-long captures of “swimmers” from near-bottom sediment traps in a submarine canyon and its adjacent open slope

Romano

Flexas

Segura

et al. 2017

Deep Sea Research Part I: Oceanographic Research Papers

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Numerous organisms, including both passive sinkers and active migrators, are captured in sediment traps together with sediments. By capturing these "swimmers", the traps become an extraordinarily tool to obtain relevant information on the biodiversity and dynamics of deep-sea organisms. Here we analyze near-bottom swimmers larger than 500 µm and their fluxes collected from eight near-bottom sediment traps installed on instrumented moorings deployed nearby Blanes Canyon (BC). Our data, obtained from November 2008 to October 2009 with a sampling rate of 15 days, constitutes the first year-long, continuous time series of the whole swimmers' community collected at different traps and bottom depths (from 300 m to 1800 m) inside a submarine canyon and its adjacent open slope (OS). The traps captured 2155 specimens belonging to 58 taxa, with Crustacea (mainly Copepoda) and Annelida Polychaeta accounting for more than 90% of the total abundance. Almost half of the identified taxa (31) were only present in BC traps, where mean annual swimmer fluxes per trap were almost one order of magnitude higher than in the OS ones. Temporal variability in swimmer fluxes was more evident in BC than in OS. Fluxes dropped in winter (in coincidence with the stormy period in the region) and remained low until the following spring. In spring, there was a switch in taxa composition, including an increase of planktonic organisms. Additionally, we report drastic effects of extreme events, such as major storms, on deep-sea fauna. The impact of such extreme events along submarine canyon systems calls to rethink the influence of climate-driven phenomena on deep-sea ecosystems and, consequently, on their living resources.

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Section: Abundance and Composition Of Swimmerssupporting

confidence: 92%

Section: Abundance and Composition Of Swimmerssupporting

confidence: 92%

Section: Abundance and Composition Of Swimmerssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Canyon effect and seasonal variability of deep-sea organisms in the NW Mediterranean: Synchronous, year-long captures of “swimmers” from near-bottom sediment traps in a submarine canyon and its adjacent open slope

Romano

Flexas

Segura

et al. 2017

Deep Sea Research Part I: Oceanographic Research Papers

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Sediment trap illustrates taxon-specific seasonal signals in Southern Ocean zooplankton

Atherden,

Slomska,

Manno

2024

Mar Biol

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Southern Ocean zooplankton provide globally significant ecosystem services through their role in carbon sequestration, nutrient cycling and food webs. However, the remote and extreme nature of the Southern Ocean creates significant logistical difficulties for studying zooplankton all year round. Here, for the first time in the Southern Ocean, we present the seasonal occurrence of the zooplankton assemblage in the Northeast Scotia Sea using a sediment trap deployed throughout 2018 (P3 observation site, 52.80˚ S, 40.14˚ W). Results show that copepods and pteropods dominated trap abundance, representing 25.0–68.3% and 13.4–72.5% respectively, followed by amphipods (1.0–7.2%) and hydrozoa (0.2–15.6%). The dominant signal in copepods was consistent with previous observations using traditional (net) sampling methods while the relative contribution of pteropods, amphipods and hydrozoa was increased in our trap. Further, zooplankton showed taxon-specific seasonal signals, with a relatively high number of individuals throughout winter, including an increase in hydrozoa occurrences. This observation highlights the importance of zooplankton as source of nutrition for the benthic community in the winter. Our data reiterate the utility of sediment traps for observing zooplankton in remote locations and sampling specific taxa that might be otherwise understudied.

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Multi-year mesozooplankton flux trends in Kongsfjorden, Svalbard

D’Angelo,

Mayers,

Renz

et al. 2024

Polar Biol

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We conducted this study to investigate the relationship between environmental stressors and mesozooplankton fluxes in inner Kongsfjorden, Svalbard. The ongoing Arctic amplification, characterized by phenomena such as increased temperatures, glacial and watershed runoff, and diminishing ice cover, poses significant challenges to marine ecosystems. Our multi-year time-series analysis (2010–2018) of mesozooplankton, collected from a moored automatic sediment trap at approximately 87 m depth, aims to elucidate seasonal and interannual variations in fluxes within this Arctic fjord. We integrate meteorological, hydrological, and chemical datasets to assess their influence on zooplankton populations. Principal component analysis reveals the impact of seawater characteristics on mesozooplankton fluxes and composition, while two-way ANOVA highlights the role of seasonality in driving variations in our dataset. We observe a decrease in swimmer fluxes following the maxima mass flux event (from 2013 onwards), coupled with an increase in community diversity, possibly attributed to copepod decline and functional diversity. Notably, sub-Arctic boreal species such as Limacina retroversa have been detected in the sediment trap since 2016. Our continuous multi-year dataset captures the physical, chemical, and biological dynamics in this extreme environment. With Arctic amplification in Kongsfjorden and increasing submarine and watershed runoff, we anticipate significant shifts in mesozooplankton communities in the medium to long-term. This underscores the urgency for further research on their adaptation to changing environmental conditions and the potential introduction of alien species.

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Deep-water zooplankton in the Mediterranean Sea: Results from a continuous, synchronous sampling over different regions using sediment traps

Cited by 15 publications

References 81 publications

Canyon effect and seasonal variability of deep-sea organisms in the NW Mediterranean: Synchronous, year-long captures of “swimmers” from near-bottom sediment traps in a submarine canyon and its adjacent open slope

Canyon effect and seasonal variability of deep-sea organisms in the NW Mediterranean: Synchronous, year-long captures of “swimmers” from near-bottom sediment traps in a submarine canyon and its adjacent open slope

Sediment trap illustrates taxon-specific seasonal signals in Southern Ocean zooplankton

Multi-year mesozooplankton flux trends in Kongsfjorden, Svalbard

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