Pharmaceutical Residues in Sediments of a Coastal Lagoon in Northwest Mexico-Occurrence and Environmental Risk Assessment.

Contamination of marine ecosystems by pharmaceutically active compounds (PhACs) deserves more research since their environmental fate differs from that observed in freshwater systems. However, knowledge remains scarce, especially in semi-arid coastal regions of the Global South. This study investigates the occurrence and distribution of caffeine, carbamazepine, ciprofloxacin, and sulfamethoxazole in sediments from the La Paz lagoon, a coastal system in a semi-arid region of Mexico with inverse estuarine conditions.

Health risk assessment by consumption of commercial biota contaminated with heavy metals in Tampamachoco coastal lagoon, Gulf of Mexico.

Metal pollution is a significant environmental and health problem in aquatic ecosystems worldwide, particularly in coastal systems impacted by emissions from thermoelectric plants, as is the case of the Tampamachoco lagoon. To evaluate the seasonal contamination levels of Cd, Pb, Cr, and Cu in species of commercial interest in the Tampamachoco lagoon and estimate the health risk associated with their consumption, a total of 180 fish, 90 oysters (Crassostrea virginica), 27 crabs (Callinectes sapidus), and 24 shrimp (Litopenaeus setiferus) were sampled. Metal concentrations in the species analyzed were Cu > Pb > Cr > Cd.

Evaluation of particulate organic carbon from MODIS-Aqua in a marine-coastal water body.

La Paz Bay (LPB) in Mexico is one of the largest marine-coastal bodies of water in the Gulf of California (GC) and is ecologically important for the feeding, reproduction, and refuge of marine species. Although particulate organic carbon (POC) is an important reservoir of oceanic carbon and an indicator of productivity in the euphotic zone, studies in this region are scarce. This study evaluates the performance of satellite-derived POC in LPB from January 2003 to December 2020.

Temporal distribution patterns of metals in water, sediment, and components of the trophic structure in a tropical coastal lagoon of the Gulf of Mexico.

Trophic transfer and bioaccumulation of trace metals have a profound impact on the structure and function of coastal areas; however, the metal accumulation patterns in detritus-based food webs and the influence of climatic variability have not been thoroughly investigated. The Tampamachoco Lagoon (Gulf of Mexico) is a coastal system impacted by emissions from a thermoelectric plant. We evaluated the spatial-temporal distribution patterns of Al, Cd, Hg, Cr, Cu, and Pb in water, sediments, and in organisms categorized by trophic levels (TLs), trophic guilds, and habitat preferences.

Isotope-based inferences of the seasonal foraging and migratory strategies of blue whales in the eastern Pacific Ocean.

Migratory marine megafauna generally move vast distances between productive foraging grounds and environmentally stable breeding grounds, but characterizing how they use these habitats to maintain homeostasis and reproduce is difficult. We used isotope analysis of blue whale skin strata (n = 621) and potential prey (n = 300) to examine their migratory and foraging strategies in the eastern Pacific Ocean. Our results suggest that most whales in the northeast Pacific use a mixed income and capital breeding strategy, and use the California Current Ecosystem as their primary summer-fall foraging ground.