Results 11 to 20 of about 661,822 (79)

Agricultural pesticides pose a continuous ecotoxicological risk to aquatic organisms in a tropical horticulture catchment

open access: yesEnvironmental Advances, 2023
Pesticides are used throughout the tropics in large amounts to protect crops against pests and weeds. These chemicals may be lost to the aquatic environment and impair its ecological status and the water quality for human consumption.
Frederik T. Weiss   +4 more
doaj   +1 more source

Composición de los macroinvertebrados según la calidad del agua en turberas de altura, Costa Rica

open access: yesRevista de Biología Tropical, 2023
Introducción: En Costa Rica, las turberas altas se localizan en la Cordillera de Talamanca de 2 400 a 3 200 m. Se forman a partir de depósitos de materia orgánica en descomposición, con oxígeno reducido y baja disponibilidad de nutrientes.
Paola Gastezzi, José E. Rincón
semanticscholar   +1 more source

Water quality evaluation using physicochemical and biological indices to characterize the integrity of the Orogodo River in sub-Saharan Africa

open access: yesFrontiers in Environmental Chemistry, 2022
The preliminary consequence of pollutants in water is to reduce the quality of water although this may not be immediately noticeable because of the self-purifying ability of some water bodies.
John Ovie Olomukoro   +4 more
doaj   +1 more source

Macroinvertebrados acuáticos como bioindicadores de la calidad ecológica en tres microcuencas del río Sampile, Choluteca, Honduras

open access: yesBionatura, 2022
En la actualidad los cuerpos de agua dulce se encuentran bajo constante presión debido a una creciente demanda del recurso, destinada principalmente para las diferentes actividades antropogénicas que se desarrollan en zonas cercanas a ellos, generando ...
Johan Rodas Vallejo   +3 more
semanticscholar   +1 more source

GLF-CR: SAR-enhanced cloud removal with global–local fusion [PDF]

open access: yesIsprs Journal of Photogrammetry and Remote Sensing, 2022
The challenge of the cloud removal task can be alleviated with the aid of Synthetic Aperture Radar (SAR) images that can penetrate cloud cover. However, the large domain gap between optical and SAR images as well as the severe speckle noise of SAR images
Fang Xu   +6 more
semanticscholar   +1 more source

A review of chromium (Cr) epigenetic toxicity and health hazards.

open access: yesScience of the Total Environment, 2023
Carcinogenic metals affect a variety of cellular processes, causing oxidative stress and cancer. The widespread distribution of these metals caused by industrial, residential, agricultural, medical, and technical activities raises concern for adverse ...
Mahalaxmi Iyer   +11 more
semanticscholar   +1 more source

Performance of selected macroinvertebrate-based biotic indices for rivers draining the Merendon Mountains region of Honduras

open access: yesCuadernos de investigación UNED, 2013
Cusuco National Park, a cloud forest park situated in the Merendon Mountains region of Honduras, is home to considerable biodiversity with a very high degree of endemism.
Paul O’Callaghan, Mary Kelly-Quinn
doaj   +1 more source

Health hazards of hexavalent chromium (Cr (VI)) and its microbial reduction

open access: yesBioengineered, 2022
Industrial effluents/wastewater are the main sources of hexavalent chromium (Cr (VI)) pollutants in the environment. Cr (VI) pollution has become one of the world’s most serious environmental concerns due to its long persistence in the environment and ...
Pooja Sharma   +3 more
semanticscholar   +1 more source

Adsorption mechanism of Cr(VI) on woody-activated carbons

open access: yesHeliyon, 2023
To provide guidance for the selection of woody-activated carbon in the treatment of wastewater containing hexavalent chromium (Cr(VI)), the adsorption tests on two varieties of commercial woody-activated carbon powder from different manufacturers were ...
Hua Wang   +3 more
semanticscholar   +1 more source

Bioindicadores de contaminación en aguas residuales de sistemas agropecuarios en el Distrito de Riego Arenal Tempisque, Guanacaste, Costa Rica

open access: yes, 2020
Drainage channels are a prominent feature of many intensively managed agricultural areas.These small shallow bodies of water refuge communities of macroinvertebrates, which resemble smallnatural lentic ecosystems.
María Fernanda Arias Araya
semanticscholar   +1 more source

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