Eva Calvo

Institut Català de Ciències del Clima

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i-10 index

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Co-Authors

Carles Pelejero

Institució Catalana de Recerca i Estudis Avançats

130

ÀL

Àngel López‐Sanz

Universitat de Barcelona

Isabel Cacho

Universitat de Barcelona

Leopoldo D. Pena

Universitat de Barcelona

Cèlia Marrasé

Institut Català de Ciències del Clima

Josep M. Gasol

Institut Català de Ciències del Clima

Helen Bostock

University of Queensland

Juancho Movilla

Instituto Español de Oceanografía

Robert M. Sherrell

Rutgers, The State University of New Jersey

Ariadna Martínez‐Dios

Institut de Ciències del Mar

Cooperative Institutions

Consejo Superior de Investigaciones Científicas

150

Institut de Ciències del Mar

111

Institut Català de Ciències del Clima

104

Universitat de Barcelona

National Research Council

Centre National de la Recherche Scientifique

Universitat Autònoma de Barcelona

European Organization for Nuclear Research

Centro Mediterráneo de Investigaciones Marinas y Ambientale

Instituto de Salud Carlos III

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Effects of low pH and feeding on calcification rates of the cold-water coralDesmophyllum dianthus

PeerJ (2020)

Ariadna Martínez‐Dios Carles Pelejero Àngel López‐Sanz Robert M. Sherrell Stanley Ko

Cold-Water Corals (CWCs), and most marine calcifiers, are especially threatened by ocean acidification (OA) and the decrease in the carbonate saturation state of seawater. The vulnerability of these organisms, however, also involves other global stressors like warming, deoxygenation or changes in sea surface productivity and, hence, food supply via the downward transport of organic matter to the deep ocean. This study examined the response of the CWC Desmophyllum dianthus to low pH under different feeding regimes through a long-term incubation experiment. For this experiment, 152 polyps were incubated at pH 8.1, 7.8, 7.5 and 7.2 and two feeding regimes for 14 months. Mean calcification rates over the entire duration of the experiment ranged between -0.3 and 0.3 mg CaCO3 g-1d-1. Polyps incubated at pH 7.2 were the most affected and 30% mortality was observed in this treatment. In addition, many of the surviving polyps at pH 7.2 showed negative calcification rates indicating that, in the long term, CWCs may have difficulty thriving in such aragonite undersaturated waters. The feeding regime had a significant effect on skeletal growth of corals, with high feeding frequency resulting in more positive and variable calcification rates. This was especially evident in corals reared at pH 7.5 (ΩA = 0.8) compared to the low frequency feeding treatment. Early life-stages, which are essential for the recruitment and maintenance of coral communities and their associated biodiversity, were revealed to be at highest risk. Overall, this study demonstrates the vulnerability of D. dianthus corals to low pH and low food availability. Future projected pH decreases and related changes in zooplankton communities may potentially compromise the viability of CWC populations.

Ocean Acidification

Scleractinia

10.7717/peerj.8236

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Citations (17)

COVID-19 lockdown moderately increased oligotrophy at a marine coastal site

The Science of The Total Environment (2021)

M. Montserrat Sala Francesc Peters Marta Sebastián Clara Cardelús Eva Calvo

COVID-19 has led to global population lockdowns that have had indirect effects on terrestrial and marine fauna, yet little is known on their effects on marine planktonic communities. We analysed the effect of the spring 2020 lockdown in a marine coastal area in Blanes Bay, NW Mediterranean. We compared a set of 23 oceanographic, microbial and biogeochemical variables sampled right after the strict lockdown in Spain, with data from the previous 15 years after correcting for long-term trends. Our analysis shows a series of changes in the microbial communities which may have been induced by the combination of the decreased nitrogen atmospheric load, the lower wastewater flux and the reduced fishing activity in the area, among other factors. In particular, we detected a slight decrease beyond the long-term trend in chlorophyll a, in the abundance of several microbial groups (phototrophic nanoflagellates and total prokaryotes) and in prokaryotic activity (heterotrophic prokaryotic production and β-glucosidase activity) which, as a whole, resulted in a moderate increase of oligotrophy in Blanes Bay after the lockdown.

Biogeochemical Cycle

10.1016/j.scitotenv.2021.151443

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Citations (12)

Més enllà de l’escalfament global: Oceans estressats globalment a l’antropocè

Mètode Revista de difusió de la investigació (2020)

Carles Pelejero Eva Calvo

La petjada de les activitats humanes sobre el planeta és tan profunda que molts científics ja suggereixen que hem entrat en una nova època geològica, l’antropocè. D’entre aquestes activitats, les que venen acompanyades de grans emissions de diòxid de carboni (CO2) afecten d’una manera global tot el planeta i, sobretot, els oceans. Aquests, a banda d’escalfar-se, es tornen progressivament més àcids i menys oxigenats. En aquest article discutim l’abast d’aquests estressos globals sobre els oceans després de contextualitzar aquest desorbitat augment antropogènic de CO2 i de veure com es distribueix. Acabem amb una discussió sobre possibilitats de mitigació a través dels oceans mateixos, tot recalcant la necessitat imperiosa i urgent d’atacar el problema, sobretot durant aquesta dècada que hem començat.

10.7203/metode.11.16830

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El canvi climàtic i els oceans

Eva Calvo

Taller de innovacion docente dirigido al profesorado para la introduccion del metodo cientifico en las aulas de primaria, ESO y bachillerato

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Controls on Primary Productivity in the Eastern Equatorial Pacific, East of the Galapagos Islands, During the Penultimate Deglaciation

Paleoceanography and Paleoclimatology (2020)

Lucía Quirós‐Collazos Eva Calvo Stefan Schouten Marcel T. J. van der Meer Marta Rodrigo‐Gámiz

Abstract Modern biogeochemical conditions of the Eastern Equatorial Pacific (EEP) region are characterized by high macronutrient concentrations but low phytoplankton abundance due to both iron and silicic acid limitation. Since primary producers significantly impact the global carbon cycle, paleoproductivity in relation to climate change and nutrient availability in this region has been a topic of a number of studies. However, the complex dynamics of this region, especially east of the Galapagos Islands, has led to some discrepancies when linking reconstructed paleoproductivity with potential mechanisms for higher primary productivity. Here we focus on reconstructing primary productivity of haptophyte algae and diatoms, as well as continental material input, sea surface salinity, and sea surface temperature, and compare these reconstructions with existing records for the period comprised between 150 and 110 ka (the penultimate deglaciation period) with the aim to understand the mechanisms that most significantly influence phytoplankton growth over the EEP region east of the Galapagos Islands. Our results suggest enhanced upwelling in the EEP system during the penultimate deglaciation and increased phytoplankton abundance mainly as the result of both the increasing influence of nutrient‐rich Southern Ocean sourced waters through the Equatorial Undercurrent and a higher input of iron through atmospheric deposition. The highest phytoplankton abundances recorded at the study site during the penultimate deglaciation also suggest that maximum input of nutrients might have occurred during the millennial‐scale event Heinrich Event 11 in the North Atlantic as a result of global atmospheric and oceanic reorganizations.

Deglaciation

Biogeochemical Cycle

Biogeochemistry

10.1029/2019pa003777

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Citations (8)

Response of Mediterranean sponges to ocean acidification

Marta Ribes Eva Calvo Juan Ignacio Movilla Ramiro Logares Rafel Coma

Ocean Acidification

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Atmosphere-ocean linkages in the eastern equatorial Pacific over the early Pleistocene

Paleoceanography (2016)

Patricia Povea Isabel Cacho Ana Moreno Leopoldo D. Pena Melisa Menéndez

Here we present a new set of high-resolution early Pleistocene records from the eastern equatorial Pacific (EEP). Sediment composition from Ocean Drilling Program Sites 1240 and 1238 is used to reconstruct past changes in the atmosphere-ocean system. Particularly remarkable is the presence of laminated diatom oozes (LDOs) during glacial periods between 1.85 and 2.25 Ma coinciding with high fluxes of opal and total organic carbon. Relatively low lithic particles (coarse and poorly sorted) and iron fluxes during these glacial periods indicate that the increased diatom productivity did not result from dust-stimulated fertilization events. We argue that glacial fertilization occurred through the advection of nutrient-rich waters from the Southern Ocean. In contrast, glacial periods after 1.85 Ma are characterized by enhanced dust transport of finer lithic particles acting as a new source of nutrients in the EEP. The benthic ecosystem shows dissimilar responses to the high productivity recorded during glacial periods before and after 1.85 Ma, which suggests that the transport processes delivering organic matter to the deep sea also changed. Different depositional processes are interpreted to be the result of two distinct glacial positions of the Intertropical Convergence Zone (ITCZ). Before 1.85 Ma, the ITCZ was above the equator, with weak local winds and enhanced wet deposition of dust. After 1.85 Ma, the glacial ITCZ was displaced northward, thus bringing stronger winds and stimulating upwelling in the EEP. The glacial period at 1.65 Ma with the most intense LDOs supports a rapid southward migration of the ITCZ comparable to those glacial periods before 1.85 Ma.

Intertropical Convergence Zone

Last Glacial Maximum

Deglaciation

10.1002/2015pa002883

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Citations (5)

Dinoflagellate cyst production index of sediment cores of the southwest Pacific

Helen Bostock Joseph G. Prebble Giuseppe Cortese Bruce W. Hayward Eva Calvo

Dinoflagellate

Industrial production index

Sediment trap

10.1594/pangaea.899812

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Citations (0)

Testing systems to monitor atmospheric CO2, PH and PCO2 in the OBSEA submarine

Instrumentation viewpoint (2014)

Carles Pelejero Marc Nogueras Cervera Carola Artero Delgado Elisa F. Guallart Àngel López Sanz

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Psychometric characteristics of the Spanish version of instruments to measure neck pain disability

BMC Musculoskeletal Disorders (2008)

Francisco M. Kovacs Joan Bagó Ana Royuela Jesús Seco‐Calvo Sergio Giménez

The NDI, COM and NPQ are evaluation instruments for disability due to NP. There was no Spanish version of NDI or COM for which psychometric characteristics were known. The objectives of this study were to translate and culturally adapt the Spanish version of the Neck Disability Index Questionnaire (NDI), and the Core Outcome Measure (COM), to validate its use in Spanish speaking patients with non-specific neck pain (NP), and to compare their psychometric characteristics with those of the Spanish version of the Northwick Pain Questionnaire (NPQ). Translation/re-translation of the English versions of the NDI and the COM was done blindly and independently by a multidisciplinary team. The study was done in 9 primary care Centers and 12 specialty services from 9 regions in Spain, with 221 acute, subacute and chronic patients who visited their physician for NP: 54 in the pilot phase and 167 in the validation phase. Neck pain (VAS), referred pain (VAS), disability (NDI, COM and NPQ), catastrophizing (CSQ) and quality of life (SF-12) were measured on their first visit and 14 days later. Patients' self-assessment was used as the external criterion for pain and disability. In the pilot phase, patients' understanding of each item in the NDI and COM was assessed, and on day 1 test-retest reliability was estimated by giving a second NDI and COM in which the name of the questionnaires and the order of the items had been changed. Comprehensibility of NDI and COM were good. Minutes needed to fill out the questionnaires [median, (P25, P75)]: NDI. 4 (2.2, 10.0), COM: 2.1 (1.0, 4.9). Reliability: [ICC, (95%CI)]: NDI: 0.88 (0.80, 0.93). COM: 0.85 (0.75,0.91). Sensitivity to change: Effect size for patients having worsened, not changed and improved between days 1 and 15, according to the external criterion for disability: NDI: -0.24, 0.15, 0.66; NPQ: -0.14, 0.06, 0.67; COM: 0.05, 0.19, 0.92. Validity: Results of NDI, NPQ and COM were consistent with the external criterion for disability, whereas only those from NDI were consistent with the one for pain. Correlations with VAS, CSQ and SF-12 were similar for NDI and NPQ (absolute values between 0.36 and 0.50 on day 1, between 0.38 and 0.70 on day 15), and slightly lower for COM (between 0.36 and 0.48 on day 1, and between 0.33 and 0.61 on day 15). Correlation between NDI and NPQ: r = 0.84 on day 1, r = 0.91 on day 15. Correlation between COM and NPQ: r = 0.63 on day 1, r = 0.71 on day 15. Although most psychometric characteristics of NDI, NPQ and COM are similar, those from the latter one are worse and its use may lead to patients' evolution seeming more positive than it actually is. NDI seems to be the best instrument for measuring NP-related disability, since its results are the most consistent with patient's assessment of their own clinical status and evolution. It takes two more minutes to answer the NDI than to answer the COM, but it can be reliably filled out by the patient without assistance. Clinical Trials Register NCT00349544.

Specialty

Neck pain

Sports medicine

10.1186/1471-2474-9-42

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Citations (78)