César A. Bernal

ORCID: 0000-0003-0580-0974
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About
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Research Areas
  • Ocean Acidification Effects and Responses
  • Marine Bivalve and Aquaculture Studies
  • Coral and Marine Ecosystems Studies
  • Coastal wetland ecosystem dynamics
  • Marine and coastal plant biology
  • Environmental and Ecological Studies
  • Microbial Fuel Cells and Bioremediation
  • Environmental Chemistry and Analysis
  • Mercury impact and mitigation studies
  • Geochemistry and Elemental Analysis
  • Marine and coastal ecosystems
  • Marine Biology and Ecology Research
  • Microplastics and Plastic Pollution
  • Geological and Tectonic Studies in Latin America
  • Water Resource Management and Quality

José Benito Vives de Andréis Marine and Coastal Research Institute
2021-2024

Institute of Marine and Coastal Research
2024

Abstract Seagrass ecosystems rank amongst the most efficient natural carbon sinks on earth, sequestering CO 2 through photosynthesis and storing organic (C org ) underneath their soils for millennia thereby, mitigating climate change. However, estimates of C stocks accumulation rates in seagrass meadows (blue carbon) are restricted to few regions, further information spatial variability is required derive robust global estimates. Here we studied soil across Colombian Caribbean. We estimated...

10.1038/s41598-021-90544-5 article EN cc-by Scientific Reports 2021-05-26

The Colombian marine and coastal areas are exposed to multiple stressors as a result of anthropic activities such agriculture, mining, port tourism, among others. added this is the lack wastewater treatment basic sanitation systems in human settlements, which contributes inadequate disposal liquid solid waste, exacerbating pollution.The ecosystems Colombia have environmental importance offer ecosystem services. For reason, country developing actions protect, conserve use them sustainable...

10.5194/oos2025-1436 preprint EN 2025-03-26

Natural processes such as upwelling of deeper-water masses change the physical-chemical conditions water column creating localized ocean acidification events that can have an impact on natural communities. This study was performed in a coral reef system archetypical bay within Tayrona National Park (PNNT) (Colombia), and aimed to quantify net calcification rates foundational species temporal context (6 months) taking into account dynamics seasonal influence area. Net fragments were obtained...

10.3390/oceans4020012 article EN cc-by Oceans 2023-04-18

Mercury pollution is a significant environmental issue, primarily resulting from industrial activities, including gold mining extraction. In this study, 333 microorganisms were tested in increasing mercury concentrations, where 158 bacteria and 14 fungi able to grow remain viable at concentrations over 5.0 mg/L of mercuric chloride (II). One the bacterial strains, Stenotrophomonas sp. INV PRT0231, isolated mouth San Juan River Chocó region Colombia, showed high resistance level (MIC90 27 ± 9...

10.3390/microorganisms12122631 article EN cc-by Microorganisms 2024-12-19

Microplastic (MP) concentrations were assessed in a 210Pb-dated sediment core from Ciénaga Los Vásquez, coastal lagoon Cartagena, Colombian Caribbean. The concentration of MPs increased over time reaching up to 5358 items/kg d.w. the year 2021 ± 0.31, which is consistent with several studies around world reflecting increase plastic production recent decades, consumption, and lack management that influence pollution settings. Nile Red-induced fluorescence under 365 nm light automatic counting...

10.2139/ssrn.4853494 preprint EN 2024-01-01

<title>Abstract</title> We explore the variation of carbonate system in water column over a seagrass meadow under ecological restoration and its correlation with Net Primary Production (NPP), Calcification (NC) Eutrophication, small coralline island within Seaflower International Biosphere Reserve, Colombian Caribbean. assessed one point another devoid seagrass, during dry rainy seasons. Dry season was characterized by higher levels pH<sub>T</sub> (total scale), descending Dissolved...

10.21203/rs.3.rs-4707952/v1 preprint EN Research Square (Research Square) 2024-08-06

Most of the theoretical and practical development ocean acidification (OA) phenomenon involves open ocean, not much is known significance variation in pH carbonate system coastal environments effect, if any, OA. Traditional potentiometric measurements are carried out on NBS scale (pHNBS), developed for freshwaters, but OA it necessary to use total (pHT), which includes additional ions seawater. Using a series in-situ potential, with pHNBS electrode artificial lagoon La Escollera Santa Marta...

10.15446/rbct.101365 article EN cc-by-nc-nd Boletín de Ciencias de la Tierra 2022-12-02

have caused changes in the hydrodynamics and contribution of sediments to Cispatá Bay [6].Using 210 Pb technique, we dated a sediment core collected bay 2019 evaluate temporal trends accumulation rates (SAR) last century, under hypothesis that input are related channel Sinú River.The results achieved will be valuable understand role River delta, erosive processes, textural features, pollution trends. Methodology Area StudyCispatá is located Colombian Caribbean Coast, enclosed The Mestizos...

10.31038/gems.2021322 article EN 2021-04-30
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