Article
Environmental Sciences
Javier Tamayo-Leiva, Jeronimo Cifuentes-Anticevic, Pilar Aparicio-Rizzo, Jose Ignacio Arroyo, Italo Masotti, Beatriz Diez
Summary: Chilean Patagonian fjords, belonging to the Subantarctic ecosystem, are one of the world's largest fjord systems. Estuarine Water strongly influences oceanographic conditions, generating sharp gradients of oxygen, salinity and nutrients. Microbial dispersion exists along the fjords, with bacterioplankton depending on eukaryotic phytoplankton community composition.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Anna Maria Addamo, Serena Zaccara, Gunter Forsterra, Juan Hofer, Ricardo Garcia-Jimenez, Giuseppe Crosa, Annie Machordom
Summary: This study focuses on the emblematic cold-water coral Desmophyllum dianthus in the Comau Fjord, confirming it as a panmictic population through analyses of microsatellite loci. The results highlight the importance of synchrony between environmental factors and the biological cycle of the species in ecological inference.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Cara Nissen, Nicolas Gruber, Matthias Muennich, Meike Vogt
Summary: The study used a high-resolution model to analyze the important role of silicifying diatoms and calcifying coccolithophores in controlling nutrient levels and stoichiometry in the Southern Ocean. Results demonstrate that the efficient consumption and export of Si(OH)4 by diatoms, as well as the export of organic matter by coccolithophores, contribute to the control of biogeochemical processes in the Southern Ocean.
GLOBAL BIOGEOCHEMICAL CYCLES
(2021)
Review
Oceanography
Joseph R. Crosswell, Francisco Bravo, Ivan Perez-Santos, Geoffrey Carlin, Nagur Cherukuru, Cassie Schwanger, Rob Gregor, Andrew D. L. Steven
Summary: This study examines the functional differences between three major fjords in the Chiloe Inland Sea (CIS) in northern Patagonia and identifies the external forcing and local geomorphology as key factors shaping biogeochemical cycling in fjords. The findings have important implications for the sustainable management of fjords and adaptation to climate change and anthropogenic stressors.
PROGRESS IN OCEANOGRAPHY
(2022)
Article
Ecology
Francisco Diaz-Rosas, Catharina Alves-de-Souza, Emilio Alarcon, Eduardo Menschel, Humberto E. Gonzalez, Rodrigo Torres, Peter von Dassow
Summary: The study showed that coccolithophores in Patagonian fjords are affected by factors like freshwater inputs, and Emiliania huxleyi is the most widely distributed species in the region, exhibiting plasticity and adaptability in its ecological response.
Article
Environmental Sciences
Nicholas Bock, Ajit Subramaniam, Andrew R. Juhl, Joseph Montoya, Solange Duhamel
Summary: Marine phytoplankton play a central role in global biogeochemical cycling and carbon export. This study presents a method for measuring picophytoplankton per-cell chlorophyll a in field samples and demonstrates its accuracy in determining the chlorophyll a content of different phytoplankton groups.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Engineering, Marine
Hyeonji Bae, Dabin Lee, Jae Joong Kang, Jae Hyung Lee, Naeun Jo, Kwanwoo Kim, Hyo Keun Jang, Myung Joon Kim, Jae-Il Kwon, Sang Heon Lee
Summary: The protein concentration of phytoplankton plays a crucial role in the growth of higher trophic levels and the balance of oceanic food webs. Developing an algorithm to estimate protein concentration and monitor spatiotemporal variations is essential for long-term monitoring of climate-related ecosystem changes in the East/Japan Sea (EJS). Further improvement of the algorithm through continuous field surveys is necessary for a better understanding of spatiotemporal variation in protein concentration.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Oceanography
Camila Soto-Riquelme, Elias Pinilla, Lauren Ross
Summary: This study investigates the seasonal variability in residual circulation, wind forcing, and stratification in a fjord and channel system in Chilean Patagonia. Results show that during winter, wind force reverses the surface outflow and creates a three-layer residual velocity structure. In spring, northward winds enhance stratification and inhibit mixing, resulting in a two-layer residual velocity structure.
CONTINENTAL SHELF RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Katherine E. Helliwell, Ellen L. Harrison, Joseph A. Christie-Oleza, Andrew P. Rees, Friedrich H. Kleiner, Trupti Gaikwad, Joshua Downe, Maria M. Aguilo-Ferretjans, Lisa Al-Moosawi, Colin Brownlee, Glen L. Wheeler
Summary: Diatoms, as a crucial phytoplankton group responsible for a significant portion of carbon fixation on Earth, utilize a unique Ca2+-dependent signaling pathway to sense and respond to phosphorus (P) availability. This pathway, conserved across different species of diatoms, allows for rapid recovery from P limitation and facilitates efficient resource competition in regions with fluctuating nutrient supplies.
Article
Environmental Sciences
Peixuan Wang, Edward Laws, Yongzhi Wang, Jixin Chen, Xue Song, Ruiping Huang, Tifeng Wang, Xiangqi Yi, Jiazhen Sun, Xianghui Guo, Xin Liu, Kunshan Gao, Bangqin Huang
Summary: The increase in atmospheric pCO(2) has caused problems for marine ecosystems. Elevated pCO(2) may enhance dominance by small diatoms and change the community structure of coastal ecosystems.
MARINE POLLUTION BULLETIN
(2022)
Article
Environmental Sciences
Peariya Anil, Nikathithara Velappan Madhu, Chazhikulam Rajan Vishal, Ponnaratta Gopika, Sukumaran Jyothi, Kanneth Satheesan Arya, Thundiyil Raju Gireeshkumar
Summary: A pioneering study using the HPLC-CHEMTAX analytical approach was conducted to investigate the dynamics of phytoplankton functional groups (PFGs) in the Ashtamudi estuary and its adjacent nearshore waters. The study found that the estuary exhibited high temperature, salinity, and ammonium levels during the non-monsoon seasons, while the summer monsoon resulted in low salinity and increased nitrate and phosphate concentrations. Cyanobacteria were the dominant phytoplankton community during the non-monsoon season, while diatoms dominated the nearshore waters. The study also revealed that the estuary was phosphorus-limited for phytoplankton growth during the non-monsoon seasons.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Ivan Perez-Santos, Patricio A. Diaz, Nelson Silva, Rene Garreaud, Paulina Montero, Carlos Henriquez-Castillo, Facundo Barrera, Pamela Linford, Constanza Amaya, Sergio Contreras, Claudia Aracena, Elias Pinilla, Robinson Altamirano, Luis Vallejos, Javiera Pavez, Juan Maulen
Summary: This study focuses on the Patagonian fjord system in the north with a 3-year observation, revealing the asynchronous seasonal input of oceanic and estuarine water, and the significant contribution of oceanic water mass to subsurface inorganic nutrient input. The N/P ratio in the water column indicates the absence of eutrophication despite intense aquaculture activities. Shifts in phytoplankton composition were observed, related to physicochemical conditions in the water column.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Oceanography
P. Anil, N. Madhu
Summary: This study evaluated the composition and temporal dynamics of phytoplankton community in the Alappuzha nearshore waters along the southwest coast of India using HPLC-derived marker pigments and microscope-based species composition data. The results showed a characteristic phytoplankton succession pattern, with a significant increase in chlorophyll a during the peak southwest monsoon period. Diatoms dominated the phytoplankton community, with cyanobacteria and cryptophytes also present. The CHEMTAX calculations confirmed the contribution of diatoms to the chlorophyll a content, regardless of seasons.
CONTINENTAL SHELF RESEARCH
(2022)
Article
Marine & Freshwater Biology
Silvia Casabianca, Samuela Capellacci, Fabio Ricci, Michele Scardi, Antonella Penna
Summary: Through analyzing long-term time series data, this study examined the phytoplankton assemblage structure and its influence by seasonal and environmental factors in the coastal areas of Northwestern Adriatic Sea in Italy. The diatom group was identified as the main component of the phytoplankton assemblage, with various species showing distinct distribution patterns based on different seasons and years, with some species being influenced by long-term trends and exhibiting an increasing frequency.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Biodiversity Conservation
Carola Ferronato, Valeria A. Guinder, Maria Paz Chidichimo, Celeste Lopez-Abbate, Martin Amodeo
Summary: In the El Rinc'on area of northern Patagonia, the study assessed the composition and biomass of protistan plankton during spring and summer of different years, revealing the presence of large copepods and mainly juveniles and adults of the anchovy near the mid-shelf front. The results provide insights into the potential link between plankton assemblages, hydrological settings, and developing stages of highly exploited fish species.
Review
Marine & Freshwater Biology
Maria Simonet Roda, Erika Griesshaber, Lucia Angiolini, Claire Rollion-Bard, Elizabeth M. Harper, Maria Aleksandra Bitner, Sara Milner Garcia, Facheng Ye, Daniela Henkel, Vreni Haussermann, Anton Eisenhauer, Helmut Gnaegi, Uwe Brand, Alan Logan, Wolfgang W. Schmahl
Summary: Biological hard tissues provide valuable design concepts for advanced materials and offer insights into the evolution of life and its environmental conditions. This review focuses on the mineral and biopolymer organization in Recent brachiopods that produce carbonate shells, highlighting the adaptability of soft and hard tissues to different marine environments. The study utilizes advanced microscopy techniques to examine the structure and assembly of these hard tissues, and discusses the potential of using brachiopod shells as archives for paleoenvironment and paleoclimate reconstructions.
Article
Environmental Sciences
Cristian Rodrigo, Erick Cifuentes, Rodrigo Fernandez, Jose Andrade, Lorena Rebolledo, Diego Munoz, Praxedes Munoz
Summary: A study in Europa Fjord near the Southern Patagonian Icefield reveals that glacier retreat and increased meltwater discharge have influenced sediment delivery and accumulation rates, impacting marine fjord ecosystems. Through detailed analysis of multibeam bathymetry, backscatter, sub-bottom seismic profiles, and sediment core samples, the study provides insights into the glacial and sedimentary evolution of the fjord and its connection to neighboring fjords.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Marine & Freshwater Biology
Carlos A. Spano, Patricia Carbajal, Benjamin Ganga, Cristian Acevedo, Vreni Haussermann
Summary: This study provides new in situ records of the sublittoral sea anemone Oulactis coliumensis from northern Chile and Peru, extending its distribution range to lower latitudes.
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
(2022)
Review
Biodiversity Conservation
Anna Maria Addamo, Javier Sellanes, Vreni Haussermann, Gunter Forsterra, Annie Machordom
Summary: This review investigates the richness and distribution of coral species in Chilean coastal and marine waters. The study reveals significant knowledge gaps in understanding coral biodiversity in Chile, especially in regards to deep-sea benthic biodiversity. Previous research has primarily focused on coastal and shallow-water habitats, neglecting the exploration of continental slope, oceanic islands, and seamounts. The results show higher coral species richness in the Magellanic Province and discontinuous temporal occurrence records.
MARINE BIODIVERSITY
(2022)
Article
Biology
Kristina K. Beck, Gertraud M. Schmidt-Grieb, Jurgen Laudien, Guenter Foersterra, Verena Haeussermann, Humberto E. Gonzalez, Juan Pablo Espinoza, Claudio Richter, Marlene Wall
Summary: The cold-water coral Desmophyllum dianthus in the Comau Fjord of Chile benefits from stable environmental conditions and shows high adaptability to new environments. Additionally, there is an inverse relationship between coral fitness and environmental variability.
COMMUNICATIONS BIOLOGY
(2022)
Article
Biodiversity Conservation
Vreni Haussermann, Carlos Molinet, Manuel Diaz Gomez, Gunter Forsterra, Jorge Henriquez, Katherine Espinoza Cea, Thamara Matamala Ascencio, Mathias Hune, Cesar A. Cardenas, Heather Glon, Nancy Barahona Toledo, Dagoberto Subiabre Mena
Summary: The non-native sea anemone species Metridium senile in Chilean Patagonia poses a threat to the local benthic community, impacting benthic resources and occupying large areas of benthic substrate. It has been observed in multiple locations and its abundance has increased over time. It is recommended to implement a monitoring program and restrict the transport of benthic invertebrates to prevent its introduction to new sites.
BIOLOGICAL INVASIONS
(2022)
Article
Multidisciplinary Sciences
Anna Maria Addamo, Serena Zaccara, Vreni Haussermann, Juan Hofer, Gunter Forsterra, Ricardo Garcia-Jimenez, Giuseppe Crosa, Annie Machordom
Summary: This study focuses on the population genetic structure and adaptation of the deep-water cold-water coral Desmophyllum dianthus in Chilean Patagonia, as well as the impacts of natural and human factors. The lack of genetic structure and asymmetric dispersion of individuals were observed. The study highlights the importance of incorporating genetic information into the management and conservation of marine resources.
SCIENTIFIC REPORTS
(2022)
Article
Biodiversity Conservation
Carlos Molinet, Verena Haussermann, Marcela Astorga, Nancy Barahona, Katherine Espinoza, Manuel Diaz, Patricio Diaz, Jorge Henriquez, Thamara Matamala, Doris Soto
Summary: This article analyses the detection and expansion of the invasive sea anemone Metridium senile in an exploited bed of the edible sea urchin Loxechinus albus in southern Chile. The results show that M. senile has increased in coverage and presence, leading to a decrease in biodiversity and a shrinkage of the sea urchin bed. The expansion of M. senile poses a serious threat to local benthic communities and small-scale fisheries, emphasizing the need for further research and management.
BIOLOGICAL INVASIONS
(2023)
Article
Fisheries
Massimiliano Drago, Celia Llorach, Unai Ormazabal Santa Cruz, Lisette Zenteno-Devaud, Lorena Rebolledo, Diego Rita, Manel Gazo, Luis Cardona
Summary: This study used stable isotope ratios in whiskers and blood of young and subadult male Antarctic fur seals to investigate their diet. The results showed that Antarctic fur seals rely predominantly on Antarctic krill year-round, with penguins as their secondary prey. These findings highlight the importance of considering the dietary reliance of young and subadult male Antarctic fur seals in ecosystem-based fisheries management.
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
(2023)
Article
Geochemistry & Geophysics
James Kershaw, Joseph A. Stewart, Ivo Strawson, Maria Luiza de Carvalho Ferreira, Laura F. Robinson, Katharine R. Hendry, Ana Samperiz, Andrea Burke, James W. B. Rae, Rusty D. Day, Peter J. Etnoyer, Branwen Williams, Vreni Haussermann
Summary: Based on the study of modern Stylasteridae corals, it is found that [Ba]SW and sample mineralogy are the main factors influencing coral Ba/Ca ratios, while seawater temperature has a weak influence. Paired Sr/Ca measurements suggest that the variability in scleractinian Ba/Ca may be related to varying degrees of Rayleigh fractionation during calcification. Stylasteridae corals have the potential to be an important new archive for paleoceanographic studies.
Article
Fisheries
R. J. Shellock, C. Cvitanovic, M. C. McKinnon, M. Mackay, I. E. van Putten, J. Blythe, R. Kelly, P. Tuohy, K. M. Maltby, S. Mynott, N. Simmonds, M. Bailey, A. Begossi, B. Crona, K. A. Fakoya, B. P. Ferreira, A. J. G. Ferrer, K. Frangoudes, J. Gobin, H. C. Goh, P. Haapasaari, B. D. Hardesty, V. Haussermann, K. Hoareau, A-K. Hornidge, M. Isaacs, M. Kraan, Y. Li, M. Liu, P. F. M. Lopes, M. Mlakar, T. H. Morrison, H. A. Oxenford, G. Pecl, J. Penca, C. Robinson, S. A. Selim, M. Skern-Mauritzen, K. Soejima, D. Soto, A. K. Spalding, A. Vadrot, N. Vaidianu, M. Webber, M. S. Wisz
Summary: This article emphasizes the importance of diverse and inclusive marine research in addressing ocean sustainability challenges in the 21st century. Despite efforts to diversify ocean science, women still face barriers to career progression within academic institutions. Drawing on the experiences of 34 global women leaders, the article proposes practical strategies and actions to empower early career women researchers to become future leaders.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Biology
Heather Glon, Vreni Haussermann, Paul E. Brewin, Paul Brickle, Sungsik Kong, Megan L. Smith, Marymegan Daly
Summary: Members of the genus Metridium, including two species M. farcimen and M. senile, are widely distributed in temperate rocky habitats and fouling communities. Their biogeographic history reflects changes in currents and habitats influenced by climate and anthropogenic activities. Sequence-capture data revealed the dispersal history of Metridium, documenting the movement between and among oceans and the influence of anthropogenic activities on modern populations. Admixture and hybridization between the two species occur as a result of anthropogenic influences, and nonnative populations in Chile and the Falkland Islands originated from multiple introductions from different coasts of the United States.
BIOLOGICAL BULLETIN
(2023)
Article
Multidisciplinary Sciences
Sebastien Moreau, Tore Hattermann, Laura de Steur, Hanna M. Kauko, Heidi Ahonen, Murat Ardelan, Philipp Assmy, Melissa Chierici, Sebastien Descamps, Tilman Dinter, Tone Falkenhaug, Agneta Fransson, Eirik Gronningsaeter, Elvar H. Hallfredsson, Oliver Huhn, Anais Lebrun, Andrew Lowther, Nico Luebcker, Pedro Monteiro, Ilka Peeken, Alakendra Roychoudhury, Magdalena Rozanska, Thomas Ryan-Keogh, Nicolas Sanchez, Asmita Singh, Jan Henrik Simonsen, Nadine Steiger, Sandy J. Thomalla, Andre van Tonder, Jozef M. Wiktor, Harald Steen
Summary: This study reports on a dense late summer phytoplankton bloom in the Southern Ocean that accumulated unusually high amounts of organic matter and supported feeding hot spots for birds and whales. The authors show that this recurring open ocean bloom is driven by anomalies in easterly winds that push sea ice southwards and favor the upwelling of deep waters enriched in hydrothermal iron.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Thomas Heran, Juergen Laudien, Rhian G. Waller, Verena Haussermann, Guenter Forsterra, Humberto E. Gonzalez, Claudio Richter
Summary: Little is known about the biology of cold-water corals, but through a three-year aquarium experiment, researchers described the reproductive mode, larval release periodicity, and early life stages of the solitary scleractinian coral Caryophyllia (Caryophyllia) huinayensis. The study found that C. huinayensis is a brooder that releases planula larvae throughout the year, and the larvae undergo metamorphosis and develop tentacles after settling.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
Karen Araya, Praxedes Munoz, Laurent Dezileau, Antonio Maldonado, Rodrigo Campos-Caba, Lorena Rebolledo, Paola Cardenas, Marcos Salamanca
Summary: This study presents evidence of marine submersion events and flooding in the coast of Chile over the past 1000 years. Sedimentary records from the Pachingo wetland were analyzed, revealing extreme events caused by storm surges, tsunamis, and heavy rains. The geochronological analysis further confirmed the timing and nature of these events.
