Cátia Carreira

University of Aveiro

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Christian Lønborg

Aarhus University

Xosé Anxelu G. Morán

King Abdullah University of Science and Technology

Mathias Middelboe

University of Copenhagen

Marc Staal

Delft University of Technology

Isabel Pereira

University of Aveiro

Corina P. D. Brussaard

Royal Netherlands Institute for Sea Research

Eva Teira

Universidade de Vigo

Xosé Antón Álvarez‐Salgado

Instituto de Investigacións Mariñas

Michele Giani

National Institute of Oceanography and Applied Geophysics

Judith A. Rosentreter

Southern Cross University

Cooperative Institutions

Universitat de les Illes Balears

Aarhus University

Australian Institute of Marine Science

University of Copenhagen

Royal Netherlands Institute for Sea Research

Consejo Superior de Investigaciones Científicas

University of Aveiro

Utrecht University

King Abdullah University of Science and Technology

Scottish Association For Marine Science

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Too hot to handle? An urgent need to understand climate change impacts on the biogeochemistry of tropical coastal waters

Global Change Biology (2023)

Cátia Carreira Patrick Joyce Xosé Anxelu G. Morán Susana Carvalho Laura J. Falkenberg

Abstract Tropical regions contain ecologically and socio‐economically important habitats, and are home to about 3.8 billion people, many of which directly depend on tropical coastal waters for their well‐being. At the basis of these ecosystems are biogeochemical processes. Climate change is expected to have a greater impact in the tropics compared to temperate regions because of the relatively stable environmental conditions found there. However, it was surprising to find only 660 research articles published focusing on the impact of climate change on the biogeochemistry of coastal tropical waters compared to 4823 for temperate waters. In this perspective, we highlight important topics in need of further research. Specifically, we suggest that in tropical regions compared to temperate counterparts climate change stressors will be experienced differently, that organisms have a lower acclimation capacity, and that long‐term baseline biogeochemical datasets useful for quantifying future changes are lacking. The low number of research papers on the impacts of climate change in coastal tropical regions is likely due to a mix of reasons including limited resources for research and limited number of long time series in many developing tropical countries. Finally, we propose some action points that we hope will stimulate more studies in tropical coastal waters.

Biogeochemistry

Biogeochemical Cycle

Tropical climate

Tropical marine climate

Global Change

Marine ecosystem

10.1111/gcb.17074

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Citations (2)

Dissolved Organic Carbon Source Influences Tropical Coastal Heterotrophic Bacterioplankton Response to Experimental Warming

Frontiers in Microbiology (2019)

Christian Lønborg Federico Baltar Cátia Carreira Xosé Anxelu G. Morán

Global change impacts on marine biogeochemistry will be partly mediated by heterotrophic bacteria. Besides ocean warming, future environmental changes have been suggested to affect the quantity and quality of organic matter available for bacterial growth. However, it is yet to be determined in what way warming and changing substrate conditions will impact marine heterotrophic bacteria activity. Using short-term (4 days) experiments conducted at 3 temperatures (-3°C, in situ, +3°C) we assessed the temperature dependence of bacterial cycling of marine surface water used as a control and 3 different dissolved organic carbon (DOC) substrates (glucose, seagrass and mangrove) in tropical coastal waters of the Great Barrier Reef, Australia. Our study shows that DOC source had the largest effect on the measured bacterial response, but this response was amplified by increasing temperature. We specifically demonstrate that 1) extracellular enzymatic activity and DOC consumption increased with warming, 2) this enhanced DOC consumption did not result in increased biomass production, since the increases in respiration were larger than for bacterial growth with warming, and 3) different DOC bioavailabilities affected the magnitude of the microbial community response to warming. We suggest that in coastal tropical waters, the magnitude of heterotrophic bacterial productivity and enzyme activity response to warming will depend partly on the DOC source bioavailability.

Bacterioplankton

Biogeochemistry

10.3389/fmicb.2019.02807

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Citations (31)

A global database of dissolved organic matter (DOM) concentration measurements in coastal waters (CoastDOM v1)

Earth system science data (2024)

Christian Lønborg Cátia Carreira Gwénaël Abril Susana Agustı́Valentina Amaral

Abstract. Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the dissolved organic matter (DOM) pool and are important components of biogeochemical cycling in the coastal ocean. Here, we present the first edition of a global database (CoastDOM v1; available at https://doi.org/10.1594/PANGAEA.964012, Lønborg et al., 2023) compiling previously published and unpublished measurements of DOC, DON, and DOP in coastal waters. These data are complemented by hydrographic data such as temperature and salinity and, to the extent possible, other biogeochemical variables (e.g. chlorophyll a, inorganic nutrients) and the inorganic carbon system (e.g. dissolved inorganic carbon and total alkalinity). Overall, CoastDOM v1 includes observations of concentrations from all continents. However, most data were collected in the Northern Hemisphere, with a clear gap in DOM measurements from the Southern Hemisphere. The data included were collected from 1978 to 2022 and consist of 62 338 data points for DOC, 20 356 for DON, and 13 533 for DOP. The number of measurements decreases progressively in the sequence DOC > DON > DOP, reflecting both differences in the maturity of the analytical methods and the greater focus on carbon cycling by the aquatic science community. The global database shows that the average DOC concentration in coastal waters (average ± standard deviation (SD): 182±314 µmol C L−1; median: 103 µmol C L−1) is 13-fold higher than the average coastal DON concentration (13.6±30.4 µmol N L−1; median: 8.0 µmol N L−1), which is itself 39-fold higher than the average coastal DOP concentration (0.34±1.11 µmol P L−1; median: 0.18 µmol P L−1). This dataset will be useful for identifying global spatial and temporal patterns in DOM and will help facilitate the reuse of DOC, DON, and DOP data in studies aimed at better characterizing local biogeochemical processes; closing nutrient budgets; estimating carbon, nitrogen, and phosphorous pools; and establishing a baseline for modelling future changes in coastal waters.

Biogeochemical Cycle

Alkalinity

Biogeochemistry

10.5194/essd-16-1107-2024

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Citations (6)

Isolation of cyanophage CrV infecting Cylindrospermopsis raciborskii and the influence of temperature and irradiance on CrV proliferation

Aquatic Microbial Ecology (2016)

LM Steenhauer Joren Wierenga Cátia Carreira RWAL Limpens A. Koster

AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 78:11-23 (2016) - DOI: https://doi.org/10.3354/ame01800 Isolation of cyanophage CrV infecting Cylindrospermopsis raciborskii and the influence of temperature and irradiance on CrV proliferation Lisa M. Steenhauer1,2,*, Joren Wierenga2, Cátia Carreira2, Ronald W. A. L. Limpens3, Abraham J. Koster3, Peter C. Pollard1, Corina P. D. Brussaard2 1Australian Rivers Institute, School of Engineering, Griffith University, 170 Kessels Road, Nathan, QLD 4111, Australia 2Department of Marine Microbiology and Biogeochemistry, NIOZ - Royal Netherlands Institute for Sea Research, and Utrecht University, PO Box 59, 1790 AB Den Burg, Texel, the Netherlands 3Electron Microscopy Section, Department of Molecular Cell Biology, Leiden University Medical Center, Postal Zone S-1-P, PO Box 9600, 2300 RC Leiden, the Netherlands *Corresponding author: lisa.steenhauer@griffithuni.edu.au ABSTRACT: A lytic virus that infects a European strain of the freshwater filamentous cyano-bacterium Cylindrospermopsis raciborskii was isolated from a lake in the Netherlands and partially characterised. With a genome size of 110 ± 15 kb, an icosahedral capsid of 65 ± 1 nm (n = 22) and a long non-contractile tail of 612 ± 31 nm (n = 15), this dsDNA cyanophage CrV appears to belong to the Siphoviridae family. CrV was highly host specific, not infecting other filamentous cyanobacteria species isolated from the same lake, nor 4 Australian strains of C. raciborskii. The latent period of this cyanophage was 20-24 h. Varying the irradiance affected cyanophage-host interactions: at low light (20 µmol quanta m-2 s-1) the latent period was 1.3 times longer compared with at mid light (90 µmol quanta m-2 s-1); burst size at mid light was 332 CrV per lysed host cell, at low light it was halved (48%) and at high light (250 µmol quanta m-2 s-1) the burst size was further reduced to only 14% of that of mid light. Temperature also affected the virus growth characteristics: the CrV latent period at high temperature (30°C) was reduced to just 11% (compared with a mid temperature of 22°C), but still the burst size increased to 541 CrV per lysed host cell; at low temperature (15°C) the latent period was prolonged 1.3-fold and the burst size was reduced to 43%. Our findings indicate that ecologically relevant environmental factors can affect the extent of viral lysis of C. raciborskii, advancing our understanding of the spread of this invasive cyanobacterium across Europe. KEY WORDS: Invasive cyanobacteria · Cyanophage · Freshwater · Latent period · Burst size · Temperature · Light Full text in pdf format PreviousNextCite this article as: Steenhauer LM, Wierenga J, Carreira C, Limpens RWAL, Koster AJ, Pollard PC, Brussaard CPD (2016) Isolation of cyanophage CrV infecting Cylindrospermopsis raciborskii and the influence of temperature and irradiance on CrV proliferation. Aquat Microb Ecol 78:11-23. https://doi.org/10.3354/ame01800 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 78, No. 1. Online publication date: November 17, 2016 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 2016 Inter-Research.

Cylindrospermopsis raciborskii

Lytic cycle

Prochlorococcus

Siphoviridae

10.3354/ame01800

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Citations (13)

Fungi and viruses as important players in microbial mats

FEMS Microbiology Ecology (2020)

Cátia Carreira Christian Lønborg Michael Kühl Ana I. Lillebø Ruth‐Anne Sandaa

Microbial mats are compacted, surface-associated microbial ecosystems reminiscent of the first living communities on early Earth. While often considered predominantly prokaryotic, recent findings show that both fungi and viruses are ubiquitous in microbial mats, albeit their functional roles remain unknown. Fungal research has mostly focused on terrestrial and freshwater ecosystems where fungi are known as important recyclers of organic matter, whereas viruses are exceptionally abundant and important in aquatic ecosystems. Here, viruses have shown to affect organic matter cycling and the diversity of microbial communities by facilitating horizontal gene transfer and cell lysis. We hypothesise fungi and viruses to have similar roles in microbial mats. Based on the analysis of previous research in terrestrial and aquatic ecosystems, we outline novel hypotheses proposing strong impacts of fungi and viruses on element cycling, food web structure and function in microbial mats, and outline experimental approaches for studies needed to understand these interactions.

Microbial mat

Microbial loop

10.1093/femsec/fiaa187

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Citations (17)

Bacterial consumption of total and dissolved organic carbon in the Great Barrier Reef

Biogeochemistry (2021)

Cátia Carreira Sam Talbot Christian Lønborg

Cycling

Carbon fibers

10.1007/s10533-021-00802-x

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Citations (13)

Peer Review #1 of "Small-scale distribution of microbes and biogeochemistry in the Great Barrier Reef (v0.1)"

Cátia Carreira Júlia Porto Silva Carvalho Samantha Talbot Isabel Pereira

Microbial communities distribute heterogeneously at small-scales (mm-cm) due to physical, chemical and biological processes.To understand microbial processes and functions it is necessary to appreciate microbes and matter at small scales, however, few studies have determined microbial, viral, and biogeochemical distribution over space and time at these scales.In this study, the small-scale spatial and temporal distribution of microbes (bacteria and chlorophyll a), viruses, dissolved inorganic nutrients and dissolved organic carbon were determined at five locations (spatial) along the Great Barrier Reef (Australia), and over 4 consecutive days (temporal) at a coastal location.Our results show that: 1) the parameters show high small-scale heterogeneity; 2) none of the parameters measured explained the bacterial abundance distributions at these scales spatially or temporally; 3) chemical (ammonium, nitrate/nitrite, phosphate, dissolved organic carbon, and total dissolved nitrogen) and biological (chl a, and bacterial and viral abundances) measurements did not reveal significant relationships at the small scale; and 4) statistically significant differences were found between sites/days for all parameter measured but without a clear pattern.

Biogeochemistry

10.7287/peerj.10049v0.1/reviews/1

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Citations (0)

Effect of increased pCO2 on phytoplankton–virus interactions

Biogeochemistry (2012)

Cátia Carreira Mikal Heldal Gunnar Bratbak

Emiliania huxleyi

Ocean Acidification

Biota

Sink (geography)

Coccolithophore

10.1007/s10533-011-9692-x

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Citations (18)

Coloured dissolved organic matter dynamics in the Great Barrier Reef

Continental Shelf Research (2021)

Christian Lønborg Lachlan I. W. McKinna Matthew Slivkoff Cátia Carreira

The coloured dissolved organic matter (CDOM) pool was studied to provide information about the characteristics and dynamics of the dissolved organic carbon (DOC) fraction in the largest contiguous coral reef system in the world, the Great Barrier Reef, Australia. The large-scale dataset consisted of 793 discrete measurements collected in offshore and coastal regions in the period from 2004 to 2017. The study demonstrates that despite spatial-temporal variations, the CDOM values in the Great Barrier Reef are comparable to those found in other oligotrophic coastal waters. The CDOM optical properties suggest a higher terrestrial contribution and low photochemical degradation of CDOM during the Austral wet season, which is in line with the higher river inputs and overcast conditions during this period compared with the other seasons. The study also revealed a strong relationship between the DOC normalized CDOM absorption coefficient at 350 nm and the spectral slope between 275 nm and 295 nm (S275-295), suggesting that the correlation between DOC and CDOM varies depending on the DOC properties or source. The poor relationship between CDOM and salinity could be explained by a range of factors, but is likely primarily linked with the extensive photochemical degradation and generally low river inputs in the Great Barrier Reef.

Spectral slope

Overcast

10.1016/j.csr.2021.104395

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Citations (9)

Impacts of Anthropogenic Resuspension on Sediment Organic Matter: An Experimental Approach

Christian Lønborg Stiig Markager Simon David Herzog Cátia Carreira Signe Høgslund

Download This Paper Open PDF in Browser Add Paper to My Library Share: Permalink Using these links will ensure access to this page indefinitely Copy URL Copy DOI

10.2139/ssrn.4737735

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