Article
Biology
Jose Maria Gomez, Miguel Verdu, Adela Gonzalez-Megias
Summary: In mammals, adulticide behavior is influenced by various factors, with male adulticide associated with size dimorphism and intrasexually selected weapons, while female adulticide is related to infanticide. The evolutionary pathways of adulticide differ between sexes in mammals.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Multidisciplinary Sciences
Javier Houspanossian, Raul Gimenez, Juan I. Whitworth-Hulse, Marcelo D. Nosetto, Wlodek Tych, Peter M. Atkinson, Mariana C. Rufino, Esteban G. Jobbagy
Summary: This study demonstrates the impacts of rainfed agriculture on hydrology through remote sensing analysis, field studies, and simulation experiments. The findings reveal that the expansion of farming in the South American plains has led to increased flood coverage and shallower groundwater levels, which are attributed to the reduced rooting depths and evapotranspiration in croplands. These results highlight the escalating flood risks associated with rainfed agriculture expansion.
Article
Geosciences, Multidisciplinary
A. M. Varuolo-Clarke, A. P. Williams, J. E. Smerdon, M. Ting, D. A. Bishop
Summary: This study found that the increase in summer precipitation in southeastern South America is influenced by the South American low-level jet. The increased moisture flux through the jet explains a portion of the observed precipitation trend, and the increased humidity is identified as the fundamental driver for the increased moisture flux and precipitation. Additionally, the intensification of the jet's velocity also contributes to the enhanced precipitation.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geology
Didier Bert, Stephane Reboulet, Benjamin Vernet, Stephane Bersac, Leon Canut
Summary: The study in southeastern France identified a new species Crioceratites claveli and proposed a new stratigraphic zone division based on the stratigraphic distribution of Crioceratites claveli and Crioceratites loryi. This may have implications for the geological study in the Mediterranean Caucasian Subrealm of the Mediterranean Province.
CRETACEOUS RESEARCH
(2021)
Article
Ecology
Alexandra L. Singleton, Megan H. Liu, Samantha Votzke, Andrea Yammine, Jean P. Gibert
Summary: The research found that genetic diversity positively influences population growth of Tetrahymena thermophila at lower temperatures, but this effect weakens as temperature increases. Moreover, the interaction between genetic diversity and temperature plays a significant role in this temperature effect.
ECOLOGY AND EVOLUTION
(2021)
Article
Environmental Sciences
Mungi Kim, Seongjin Hong, Young Kyun Lim, Jihyun Cha, Youngnam Kim, Chang-Eon Lee, Ji Nam Yoon, Hee-Seok Lee, Seung Ho Baek
Summary: This study aimed to determine the spatial and seasonal distributions of 12 lipophilic marine biotoxins (LMTs) in phytoplankton and mussels in the South Sea Coast of Korea in 2021, and evaluate the potential risks to human health. The findings showed that Gonyaulux spinifera and Dinophysis acuminata had high densities and LMT concentrations from May to July. SPATT samples detected more diverse LMTs than seawater, phytoplankton, and mussels. The concentrations of LMTs in domestic seafood samples were below the recommended standard and posed no significant risk to human health.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biodiversity Conservation
Gabriele Midolo, Camilla Wellstein, Soren Faurby
Summary: The study found that the 'fitness-centre' relationship is rare, with only a few cases showing a significant positive correlation, and it is not affected by the precision of the SDMs or the dispersal ability and climatic breath of the species.
Article
Marine & Freshwater Biology
Pedro Carriquiriborde, Juan Ignacio Fernandino, Carina G. Lopez, Eduardo de San Benito, Juan Manuel Gutierrez-Villagomez, Diego Cristos, Vance L. Trudeau, Gustavo M. Somoza
Summary: Atrazine (ATZ) is a common contaminant in freshwater ecosystems in agricultural regions. This study evaluated the effects of ATZ on gene expression and early gonadal development in Odontesthes bonariensis larvae during the gonadal differentiation period. Results showed increased fish growth in fish exposed to 7 and 70 mu g ATZ/L at 6 wah, but this effect disappeared at 12 wah. ATZ from 7 mu g ATZ/L upregulated the expression of lhb. However, a dimorphic effect was observed on the expression of cyp19a1a at 70 mu g ATZ/L, upregulating or downregulating mRNA transcription in males and females, respectively. In addition, delayed ovarian development and increased number of testicular germ cells were observed at 7 to 70 mu g ATZ/L, respectively. One larva at 70 mu g ATZ/L also showed sex inversion. Overall, ATZ disrupted HPG axis physiology and normal gonadal development in O. bonariensis larvae at environmentally relevant concentrations.
AQUATIC TOXICOLOGY
(2023)
Article
Ecology
Corey T. Callaghan, Facundo X. Palacio, Yanina Benedetti, Federico Morelli, Diana E. Bowler
Summary: Quantifying intraspecific and interspecific trait variability is crucial for understanding biogeography, ecology, and conservation. This study used citizen science data to examine bird responses to urbanization across the US and found that interspecific variability was greater than intraspecific variability.
JOURNAL OF ANIMAL ECOLOGY
(2023)
Review
Marine & Freshwater Biology
Diego Frau
Summary: The article discusses the role of grazing as a controlling factor of phytoplankton in South America, comparing different mechanisms such as fish, microphagous rotifers, and copepoda. The impact of exotic filter-feeding fish and bivalves on phytoplankton remains controversial. Further research is needed to fully understand the grazing effects on phytoplankton in South America.
Article
Multidisciplinary Sciences
Zoltan Botta-Dukat
Summary: Comparing variations of traits within species can test ecological theories. Measures of relative variation, such as the coefficient of variation (CV), are commonly used to remove the effect of mean trait differences. However, using CV may result in differences in interpretation, especially with outlier trait values. The quartile coefficient of variation is a better alternative as it gives the same value for a trait and its inverse and is not sensitive to outliers.
SCIENTIFIC REPORTS
(2023)
Article
Plant Sciences
Mariana Gabriela Lopez, Monica Fass, Juan Gabriel Rivas, Jose Carbonell-Caballero, Pablo Vera, Andrea Puebla, Raquel Defacio, Joaquin Dopazo, Norma Paniego, Horacio Esteban Hopp, Veronica Viviana Lia
Summary: This study aimed to estimate plastome diversity within Zea mays and analyse the distribution of haplotypes in South American maize landraces. The results identified 27 haplotypes among 51 individuals, with differences between Andean and lowland South American landraces. However, differentiation patterns did not provide meaningful information on subspecies diversification.
Article
Meteorology & Atmospheric Sciences
Zhaoxiangrui He, Aiguo Dai, Mathias Vuille
Summary: The South American climate is influenced by both Atlantic Multidecadal Variability (AMV) and Pacific Multidecadal Variability (PMV), with complex correlations observed between precipitation and temperature changes. The perturbations in local circulations play a key role in driving these anomalies, with varying patterns observed in different seasons and regions.
JOURNAL OF CLIMATE
(2021)
Article
Meteorology & Atmospheric Sciences
Nicolas Diaz, Marcelo Barreiro, Nicolas Rubido
Summary: The South American dipole (SAD) is the main mode of rainfall variability in South America. This study investigates the intraseasonal predictability of the SAD in relation to the Madden-Julian oscillation (MJO). Significant predictability windows for the SAD's extreme states emerge up to 10-20 days after the MJO is found in phase 2.
JOURNAL OF CLIMATE
(2022)
Article
Multidisciplinary Sciences
Rikho Jerikho, Surya Gentha Akmal, Veryl Hasan, Yonvitner, Jindrich Novak, Andre Lincoln Barroso Magalhaes, Alberto F. Maceda-Veiga, Michael L. Tlusty, Andrew Rhyne, Ondrej Slavik, Jiri Patoka
Summary: The pet trade serves as an important pathway for the introduction of aquatic non-native species, with Indonesia playing a significant role in this trade. A survey of the Indonesian market and aquaculture reveals the volume of trade and the customer countries involved in the import of South American river stingrays. Analysis of the climate similarities between the native range of these species and Indonesia identifies several areas suitable for their establishment, and the presence of established populations in the Brantas River confirms this. The unregulated culture of these stingrays poses a risk to wildlife, highlighted by the first recorded case of envenomation caused by Potamotrygon spp. outside of South America. Continuous monitoring and risk mitigation measures are strongly recommended.
SCIENTIFIC REPORTS
(2023)
Article
Biotechnology & Applied Microbiology
Patricia I. Gomez, Paola Haro, Priscilla Lagos, Yussi Palacios, Jennifer Torres, Katia Saez, Pablo Castro, Victor Gonzalez, Ingrid Inostroza, Mariela A. Gonzalez
JOURNAL OF APPLIED PHYCOLOGY
(2016)
Article
Plant Sciences
Mariela A. Gonzalez, Paula A. Aguayo, Ingrid de L. Inostroza, Pablo A. Castro, Glenda A. Fuentes, Patricia I. Gomez
Article
Fisheries
J. L. Iriarte, J. Leon-Munoz, R. Marce, A. Clement, C. Lara
NEW ZEALAND JOURNAL OF MARINE AND FRESHWATER RESEARCH
(2017)
Article
Fisheries
Ricardo Giesecke, Alejandro Clement, Jose Garces-Vargas, Jorge I. Mardones, Humberto E. Gonzalez, Luciano Caputo, Leonardo Castro
LATIN AMERICAN JOURNAL OF AQUATIC RESEARCH
(2014)
Article
Biochemistry & Molecular Biology
Pablo A. Castro-Varela, Paula S. M. Celis-Pla, Roberto Abdala-Diaz, Felix L. Figueroa
Summary: This study found that different light qualities significantly affect the photosynthetic efficiency, growth, and biochemical composition of Porphyridium cruentum. When supplemented with blue light under SOX light, the microalgae showed higher photosynthetic efficiency and significant differences in total protein levels and phycoerythrin content.
PHOTOCHEMISTRY AND PHOTOBIOLOGY
(2021)
Article
Plant Sciences
Pablo Castro-Varela, Katia Saez, Patricia I. Gomez
Summary: This study demonstrates the feasibility of using urea as a low-cost nitrogen source for the culture of the red microalga P. purpureum, as well as the viability of growing this species outdoors in Central-Southern Chile. Lipid content in the culture was significantly affected by the nitrogen source, while protein content was influenced by nitrogen concentration.
Article
Environmental Sciences
Pablo Castro-Varela, Paula S. M. Celis-Pla, Felix L. Figueroa, Monica Rubilar
Summary: This study evaluated the extraction and separation of R-phycoerythrin from S. skottsbergii using two green technologies, ultrasound-assisted extraction and high-pressure homogenization. The results showed that high-pressure homogenization was the most efficient extraction method, with extraction yields consistent with predictive values, and R-phycoerythrin exhibited antioxidant capacity.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Thais Favero Massocato, Victor Robles-Carnero, Bruna Rodrigues Moreira, Pablo Castro-Varela, Lorena Pinheiro-Silva, Willian da Silva Oliveira, Julia Vega, Antonio Aviles, Jose Bonomi-Barufi, Leonardo Rubi Rorig, Felix L. Figueroa
Summary: This study found that the seaweeds Ulva pseudorotundata and Ulva rigida can effectively remove nutrients, especially ammonium and nitrate, from wastewater. The growth rate and protein content of both seaweed species were higher when cultivated in 100% effluent concentration compared to 50%. These findings contribute to the improvement of seaweed growth and biofiltration capacity, as well as management practices in aquaculture effluent treatment systems.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Studies
Eduardo Bustos, Hugo Robotham, Guillermo Rodriguez, Francisco Ther-Rios, Jorge Munoz, Lorenzo Andrade, Nancy Barahona, Alejandro Clement
Summary: This article proposes a method to integrate sustainable development indicators to assess the status of small-scale fisheries in developing countries and suggest corrective measures. By converting indicators into sustainability indices, this approach improves public communication. Applying this method to king's littleneck clam fisheries in Quellon, Chile, it is found that overfishing is occurring and management actions are necessary to increase sustainability levels.
Article
Marine & Freshwater Biology
Marcela Avila, Constanza De Zarate, Alejandro Clement, Pamela Carbonell, Felipe Perez
REVISTA DE BIOLOGIA MARINA Y OCEANOGRAFIA
(2015)
Article
Marine & Freshwater Biology
JI Carreto, M Seguel, NG Montoya, A Clément, MO Carignan
JOURNAL OF PLANKTON RESEARCH
(2001)
Article
Fisheries
G Arzul, M Seguel, A Clément
ICES JOURNAL OF MARINE SCIENCE
(2001)