Elephant seals as ecosystem sentinels for the northeast Pacific Ocean twilight zone

Science, Journal Year: 2025, Volume and Issue: 387(6735), P. 764 - 769

Published: Jan. 2, 2025

The open ocean twilight zone holds most of the global fish biomass but is poorly understood owing to difficulties measuring subsurface ecosystem processes at scale. We demonstrate that a wide-ranging carnivore—the northern elephant seal—can serve as an sentinel for zone. link basin–scale foraging success with oceanographic indices estimate abundance five decades into past, and future. discovered small variation in maternal amplified larger changes offspring body mass enormous first-year survival recruitment. Worsening conditions could shift predator population trajectories from current growth sharp declines. As integrators, predators reveal impacts future anthropogenic change on ecosystems.

Language: Английский

Acute Toxicity Assessment of Textile Wastewater Treated with Pinus patula Biochar Using Daphnia pulex

Water, Journal Year: 2025, Volume and Issue: 17(8), P. 1143 - 1143

Published: April 11, 2025

The discharge of textile wastewater (TWW) into the environment releases multiple toxic substances that pose a significant threat to aquatic life. Most studies evaluating treatment efficiency focus on removal parameters, such as chemical oxygen demand (COD), total organic carbon (TOC), dissolved (DOC), biochemical (BOD), and colour. One processes has presented high efficiencies in TWW is use biochar (BC) an adsorbing material. BC shown ability remove complex from water since it able decrease content COD, TOC, DOC. However, toxicity treated effluents not been widely studied. In this regard, essential only treatments removing matter but also their reduce WW toxicity. This research evaluates acute real with Pinus patula by using Daphnia pulex sentinel species. For purpose, D. individuals were exposed BC-treated for 48 h, mortality defined absence movement limbs antennas. It was found although P. 120 min eliminated 72.8% initial DOC under optimal conditions (pH 3 13.5 g/L dose), effluent remained toxic, inducing 85.7% 71.4% rates 100% (v/v) 50% dilutions. Despite increase survival rate due protective effect achieved constituents contained reconstituted samples, these findings emphasize necessity conducting before considering after having treated.

Language: Английский

Programa ECOFAM: integrando ciencia ciudadana y fauna marina en la costa de la provincia de Buenos Aires

El Hornero, Journal Year: 2024, Volume and Issue: 39(1), P. 105 - 117

Published: Aug. 15, 2024

El Equipo Costero de Observadores Fauna y Ambiente Marinos (ECOFAM) es un programa ciencia ciudadana que promueve, a través la participación voluntarios comunidades locales, generación información calidad sobre el ambiente fauna marina en litoral atlántico Argentina. Durante los dos primeros años actividades costa provincia Buenos Aires (septiembre 2020-agosto 2022), 82 efectuaron recorridas playas durante 953 horas registraron 2297 carcasas 53 especies total, correspondientes aves (n=2069, 34 especies), tortugas marinas (n=7, 3 especies) mamíferos marinos (n=221, 16 especies). Las observaciones se del portal iNaturalist desarrolló una aplicación adicional para facilitar identificación las carcasas. Entre aves, pingüinos (Fam. Spheniscidae) fueron más abundantes (n=1712), seguido por petreles pardelas (Procellariidae, n=136), albatros (Diomedeidae, n=66), macáes (Podicipedidae, n=57), gaviotas (Laridae, n=47). Pingüino Patagónico (Spheniscus magellanicus) fue especie con mayor número (n=1691), presentando patrón abundancia temporal máximos entre meses febrero mayo. En distribución otras registros numerosos (Ardenna gravis Puffinus puffinus) también observó tendencia estacional desde enero mayo, noviembre marzo, respectivamente. Se presentan características programa, realizadas diversidad registros.