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Mostrando publicaciones 1-8 de 8
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A source of isotopically light organic carbon in a low-pH anoxic marine zone
Vargas, Cristian A.; Cantarero, Sebastian I.; Sepúlveda, Julio; Galán, Alexander; De Pol-Holz, Ricardo; Walker, Brett; Schneider, Wolfgang; Farías, Laura; Cornejo D´Ottone, Marcela; Walker, Jennifer; Xu, Xiaomei; Salisbury, Joe (2021)Geochemical and stable isotope measurements in the anoxic marine zone (AMZ) off northern Chile during periods of contrasting oceanographic conditions indicate that microbial processes mediating sulfur and nitrogen cycling ...
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Argo float reveals biogeochemical characteristics along the freshwater gradient off western patagonia
Galán, Alexander; Saldías, Gonzalo S.; Corredor-Acosta, Andrea; Muñoz, Richard; Lara, Carlos; Iriarte, José L. (2021)The coastal region off Chilean Patagonia has been poorly studied due to the lack of available observations. Here we analyzed, by the very first time, biogeochemical (BGC) data to elucidate the role that biological and ...
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Biogeochemical response of the water column of Concepción Bay, Chile, to a new regime of atmospheric and oceanographic variability
Bustos-Espinoza, Luis; Torres-Ramírez, Patricio; Figueroa, Sergio; González, Pablo S.; Pavez, Marcelo A.; Jerez, Rodolfo; Saldías, Gonzalo S.; Espinoza, Claudio; Galán, Alexander (2024)Concepción Bay is a socio-economic and ecologically important embayment whose hydrographic variability has been historically regulated by wind-modulated seasonal upwelling events during spring–summer and by freshwater from ...
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Climatic regulation of vegetation phenology in protected areas along western South America
Lara, Carlos; Saldías, Gonzalo S.; Cazelles, Bernard; Rivadeneira, Marcelo M.; Muñoz, Richard; Galán, Alexander; Paredes, Álvaro L.; Fierro, Pablo; Broitman, Bernardo R. (2021)Using 19 years of remotely sensed Enhanced Vegetation Index (EVI), we examined the effects of climatic variability on terrestrial vegetation of six protected areas along southwestern South America, from the semiarid edge ...
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Fungal symbionts enhance N-uptake for Antarctic plants even in non-N limited soils
Acuña-Rodríguez, Ian S.; Galán, Alexander; Torres-Díaz, Cristian; Atala, Cristian; Molina-Montenegro, Marco A. (2020)Plant-fungi interactions have been identified as fundamental drivers of the plant host performance, particularly in cold environments where organic matter degradation rates are slow, precisely for the capacity of the fungal ...
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Oceanic phytoplankton structure off western Patagonia during the austral summer: implications for harmful algal blooms
Corredor-Acosta, Andrea; Galán, Alexander; Saldías, Gonzalo S.; Mardones, Jorge I.; Medellín-Mora, Johanna; Frangopulos, Máximo; Shiozaki, Takuhei; Harada, Naomi; González, Humberto E.; Iriarte, José L. (2025)Changes in phytoplankton composition and abundance are controlled by multiple factors, including physical forcing and nutrient stoichiometry. This study seeks to assess the interplay between the environmental and biogeochemical ...
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Spatiotemporal distribution of key pelagic microbes in a seasonal oxygen-deficient coastal upwelling system of the Eastern South Pacific Ocean
Molina, Verónica; Belmar, Lucy; Levipan, Héctor A.; Ramírez-Flandes, Salvador; Anguita, Cristóbal; Galán, Alexander; Montes, Ivonne; Ulloa, Osvaldo (2020)The strong seasonal variability in physical-chemical conditions of the Eastern South Pacific Ocean creates an ideal setting to study spatiotemporal distribution of key marine microbial communities. We herein report a nearly ...
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The role of upwelling intermittence in the development of hypoxia and nitrogen loss over the Oregon shelf
Galán, Alexander; Zirbel, Marnie Jo; Saldías, Gonzalo S.; Chan, Francis; Letelier, Ricardo (2020)Coastal upwelling regions represent less than 2% of the marine biosphere's volume. Nonetheless, local biogeochemical processes have a considerable impact on the structure and functioning of the global oceans. In this study ...