Long-term and seasonal zooplankton dynamics in the northwest Iberian shelf and its relationship with meteo-climatic and hydrographic variability

Buttay, Lucie; Miranda, A.; Casas, Gerardo; González-Quirós, R.; Nogueira, E.

doi:10.1093/plankt/fbv100

Cited by 33 publications

(41 citation statements)

References 71 publications

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“…However, investigations focusing on the dynamics of whole zooplankton communities have been based mainly on freshwater ecosystems (Keitt et al ; Keitt ; Vasseur et al ), so there is a scarcity of studies dealing with zooplankton dynamics of natural marine populations. A previous analysis of the dataset used in the present work described significant changes on the zooplankton community (Buttay et al ). More precisely, an important increase of the abundance of the whole zooplankton community as well as all the main taxa studied was observed from 2001 onwards.…”

mentioning

confidence: 77%

Environmental multi‐scale effects on zooplankton inter‐specific synchrony

Buttay

Cazelles

Miranda

et al. 2017

Limnology & Oceanography

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confidence: 77%

Environmental multi‐scale effects on zooplankton inter‐specific synchrony

Buttay

Cazelles

Miranda

et al. 2017

Limnology & Oceanography

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“…On the other hand, Valdés et al. () showed a significant reduction in primary production in a transect situated in Cantabrian Sea in the period 1993–2003 and Buttay, Miranda, Casas, González‐Quirós, and Nogueira () found that total zooplankton abundance in the Ría de Vigo and adjacent shelf declined between 1995 and 2001. In this sense, although not in all the subareas analyzed, there is a decrease in the production of the system related to the decrease in the upwelling, there seems to be a modification related to the environmental regime shift of mid‐1990s.…”

Section: Discussionmentioning

confidence: 99%

Study of sardine (Sardina pilchardus) regime shifts in the Iberian Atlantic shelf waters

Cabrero

González-Nuevo

Gago

et al. 2018

Fisheries Oceanography

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Sardine fisheries in the Iberian Atlantic shelf (36°N–44.5°N) show decadal‐scale cycles. In the late 1990s, a positive phase in sardine stock was expected; on the contrary, catches have declined until now. Regime shifts in climatic and oceanographic variables on different scales (as forcing factor) and shifts in sardine stock (as result) have been used with the aim of identifying the physical variables that explain most of the sardine population variance in the region. Circa 1998, when last sardine regime shift was detected, the main patterns of large‐scale atmospheric circulation in the Northern Hemisphere with influence in the study area namely Northern Atlantic Oscillation (NAO) and East Atlantic (EA) pattern changed and coupled in a combination that led to a rise in sea surface temperature and a decline in the coastal upwelling intensity. Several years with a downwelling situation in average in the main spawning and feeding Iberian sardine areas would have affected the stock abundance, averting the return to the projected positive regime. The sardine negative regime shift was detected first in the regions of the study located further north. The regional variable latent heat flux that groups a set of environmental processes related to the ocean–atmosphere heat exchanges and so with the turbulence manages to explain the 72% of sardine recruitment.

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“…Cnidarians are not very abundant in zooplankton community in Galicia (Buttay et al, 2015). Thus, these results could suggest selective predation on cnidarians, as also observed in turtles and sunfish (Dodge et al, 2011; Sousa et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Diet Composition and Variability of Wild Octopus vulgaris and Alloteuthis media (Cephalopoda) Paralarvae: a Metagenomic Approach

et al. 2017

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The high mortality of cephalopod early stages is the main bottleneck to grow them from paralarvae to adults in culture conditions, probably because the inadequacy of the diet that results in malnutrition. Since visual analysis of digestive tract contents of paralarvae provides little evidence of diet composition, the use of molecular tools, particularly next generation sequencing (NGS) platforms, offers an alternative to understand prey preferences and nutrient requirements of wild paralarvae. In this work, we aimed to determine the diet of paralarvae of the loliginid squid Alloteuthis media and to enhance the knowledge of the diet of recently hatched Octopus vulgaris paralarvae collected in different areas and seasons in an upwelling area (NW Spain). DNA from the dissected digestive glands of 32 A. media and 64 O. vulgaris paralarvae was amplified with universal primers for the mitochondrial gene COI, and specific primers targeting the mitochondrial gene 16S gene of arthropods and the mitochondrial gene 16S of Chordata. Following high-throughput DNA sequencing with the MiSeq run (Illumina), up to 4,124,464 reads were obtained and 234,090 reads of prey were successfully identified in 96.87 and 81.25% of octopus and squid paralarvae, respectively. Overall, we identified 122 Molecular Taxonomic Units (MOTUs) belonging to several taxa of decapods, copepods, euphausiids, amphipods, echinoderms, molluscs, and hydroids. Redundancy analysis (RDA) showed seasonal and spatial variability in the diet of O. vulgaris and spatial variability in A. media diet. General Additive Models (GAM) of the most frequently detected prey families of O. vulgaris revealed seasonal variability of the presence of copepods (family Paracalanidae) and ophiuroids (family Euryalidae), spatial variability in presence of crabs (family Pilumnidae) and preference in small individual octopus paralarvae for cladocerans (family Sididae) and ophiuroids. No statistically significant variation in the occurrences of the most frequently identified families was revealed in A. media. Overall, these results provide new clues about dietary preferences of wild cephalopod paralarvae, thus opening up new scenarios for research on trophic ecology and digestive physiology under controlled conditions.

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Long-term and seasonal zooplankton dynamics in the northwest Iberian shelf and its relationship with meteo-climatic and hydrographic variability

Cited by 33 publications

References 71 publications

Environmental multi‐scale effects on zooplankton inter‐specific synchrony

Environmental multi‐scale effects on zooplankton inter‐specific synchrony

Study of sardine (Sardina pilchardus) regime shifts in the Iberian Atlantic shelf waters

Diet Composition and Variability of Wild Octopus vulgaris and Alloteuthis media (Cephalopoda) Paralarvae: a Metagenomic Approach

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