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Catarina Guerreiro

University of Lisbon

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Jan-Berend W Stuut

Vrije Universiteit Amsterdam

Laura F Korte

International Union for Conservation of Nature (Bangladesh)

Geert-Jan A Brummer

Royal Netherlands Institute for Sea Research

Michèlle van der Does

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung

Chris I Munday

Royal Netherlands Institute for Sea Research

Stefan Schouten

Royal Netherlands Institute for Sea Research

Dirk Jong

Vrije Universiteit Amsterdam

Henko de Stigter

Royal Netherlands Institute for Sea Research

Rick Hennekam

Royal Netherlands Institute for Sea Research

Carolina Sá

University of Lisbon

Cooperative Institutions

University of Lisbon

Royal Netherlands Institute for Sea Research

Utrecht University

University of Bremen

Vrije Universiteit Amsterdam

University of Aveiro

University of Algarve

Plymouth Marine Laboratory

National Oceanography Centre

Institut de Ciències del Mar

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Observations on the morphological diversity and distribution of two siliceous nannoplankton genera, Hyalolithus and Petasaria

Micropaleontology (2016)

Richard W. Jordan Kenta Abe Jarrett W. Cruz Ruth Eriksen Catarina Guerreiro

Scale-bearing siliceous nannoplankton are occasionally encountered in surface seawater samples, but are rarely identified or illustrated. In this study, the morphological diversity of the haptophyte Hyalolithus neolepis and the enigmatic Petasaria heterolepis are investigated in scanning and transmission electron microscopes using materials from around the world. Results show that H. neolepis scales exhibit variation in the width of the marginal hyaline area, but intermediate specimens make separation of the two morphologies difficult. Petasaria heterolepis scales also show differences, in the presence of tubercle rows in the hyaline area and degree of hyaline areal coverage, but separation into discrete varieties is difficult at present. However, specimens with scales bearing a protuberance are considered to be distinct enough to warrant the erection of a new species, Petasaria protuberans Jordan,Malinverno, Å upraha, Thomsen et Young sp. nov.

Haptophyte

Hyaline

10.47894/mpal.61.6.04

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Citations (6)

The role of estuarine discharges on the biogeochemical characteristics of the nearby continental shelf ecosystem. The Guadalquivir-Gulf of Cadiz case study

Catarina Guerreiro Diego Macías Álvaro Peliz Laura Prieto Javier Ruiz

Biogeochemical Cycle

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Late winter coccolithophore bloom off central Portugal in response to river discharge and upwelling

Continental Shelf Research (2013)

Catarina Guerreiro Anabela Oliveira Henko de Stigter Mário Cachão Carolina Sá

Coccolithophore

Emiliania huxleyi

Bloom

10.1016/j.csr.2013.04.016

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Citations (56)

Supplementary material to "Coccolithophore fluxes in the open tropical North Atlantic: influence of the Amazon river and of Saharan dust deposition"

Catarina Guerreiro Karl‐Heinz Baumann Geert-Jan A Brummer Gerhard Fischer Laura F Korte

Coccolithophore

Deposition

10.5194/bg-2017-216-supplement

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Coastal environmental changes after the Saemangeum seawall construction

Frontiers in Marine Science (2024)

Ji-Yeon Baek Catarina Guerreiro Jaeseong Kim Jungho Nam Young‐Heon Jo

The coastal environment in the Saemangeum area has experienced persistent physical stresses owing to the irregular operation of the sluice gates and related artificial disturbances since seawall construction, which has led to restricted freshwater-seawater circulation. To understand the impacts of stress, we performed long-term (1999-2022, 24 years) in situ measurements of relevant biotic and abiotic parameters and employed the random forest (RF) technique to determine the phytoplankton community response to environmental disturbance. Specifically, we estimated chlorophyll-a (Chl-a) concentrations using an RF model based on various environmental factors such as sea surface temperature (SST), sea surface salinity (SSS), dissolved oxygen saturation (DO), dissolved inorganic nitrogen (DIN), and dissolved inorganic phosphorus (DIP) as input variables. From the RF analysis, each environmental factor contributed to variation in Chl-a concentration as follows: SSS (42.91%), SST (17.88%), DIP (14.38%), DIN (13.36%), and DO (11.48%). In addition, we performed sensitivity experiments by altering the salinity, which was revealed to be the most influential environmental parameter. As a result, Chl-a concentration increased by approximately 1.79 times in lower salinity conditions (from 7 to 27 psu) compared to the normal salinity conditions prior to the seawall construction (from 12 to 32 psu) in both areas, including the inside and outside the seawall. More importantly, lower salinity conditions stimulated dinoflagellate blooms, that is, red tides, implying that restricted freshwater-seawater circulation could worsen coastal ecosystems. Thus, this study contributes to understanding the impacts of environmental changes caused by sluice gate manipulation on marine ecosystems, such as phytoplankton community dynamics. Moreover, this study recommends an ecologically suitable operation scheme for Saemangeum sluice gates to ensure a healthy coastal ecosystem.

Seawall

10.3389/fmars.2023.1307218

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Compositional Data Analysis (CoDA) as a tool to study the (paleo)ecology of coccolithophores from coastal-neritic settings off central Portugal

Sedimentary Geology (2015)

Catarina Guerreiro Mário Cachão Vera Pawlowsky‐Glahn Anabela Oliveira Aurora Rodrigues

Coccolith

Submarine canyon

Coda

Seafloor Spreading

10.1016/j.sedgeo.2015.01.012

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Citations (6)

Particle fluxes from sediment trap M4U

Laura F Korte Geert-Jan A Brummer Michèlle van der Does Catarina Guerreiro Rick Hennekam

Sediment trap

Trap (plumbing)

Particle (ecology)

10.1594/pangaea.872091

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Particle fluxes from sediment trap M2L

Laura F Korte Geert-Jan A Brummer Michèlle van der Does Catarina Guerreiro Rick Hennekam

Sediment trap

Trap (plumbing)

Particle (ecology)

10.1594/pangaea.872087

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Particle fluxes from sediment trap M5L

Laura F Korte Geert-Jan A Brummer Michèlle van der Does Catarina Guerreiro Rick Hennekam

Sediment trap

Trap (plumbing)

Particle (ecology)

10.1594/pangaea.872092

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Coccolithophore fluxes in the open tropical North Atlantic

Catarina Guerreiro Karl‐Heinz Baumann Geert-Jan A Brummer Gerhard Fischer Laura F Korte

Coccolithophore

Tropical Atlantic

Tropical marine climate

Atlantic hurricane

10.1594/pangaea.881485

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