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    Wyświetlanie 1-3 z 3
    Tytuł:
    Evaluation of Surface Sediment Quality in Rivers with Fish Farming Potential (Peru) Using Indicators of Contamination, Accumulation and Ecological Risk of Heavy Metals and Arsenic
    Autorzy:
    Custodio, María
    Fow, Anthony
    Peñaloza, Richard
    Chanamé, Fernán
    Cano, Deyvis
    Powiązania:
    https://bibliotekanauki.pl/articles/1838420.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    sediment quality
    river
    fish potential
    pollution
    accumulation
    ecological risk
    Opis:
    Surface sediment quality of potential rivers in Peru was evaluated using indicators of contamination, accumulation and ecological risk of heavy metals and As. Surface sediment samples were collected at 54 sampling sites in the Tishgo and Chia rivers during 2018. The determination of Cu, Pb, Zn and As was performed by flame atomic absorption spectrophotometry. The results revealed the decreasing order of the mean concentrations of heavy metals and As in the Chia River of Zn > Cu > As > Pb and Tishgo of Zn > Pb > As > Cu. The PLI for the Tishgo River were greater than one (PLI > 1) denoting the deterioration it has been experiencing. In the Chia River, 60% of the sampling sites indicated no appreciable contamination by these elements (PLI < 1). The Igeo values of As in both rivers showed a state of contamination, from moderately to severely contaminated. In the Tishgo River the potential ecological risk varied from low to moderate and in the Chia River from low to considerable. Finally, this study reveals the applicability of the evaluation indexes of contamination, accumulation and potential ecological risk of toxic metals so that special control measures can be adopted.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 5; 78-87
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy Metals and Arsenic in Water, Sediment and the Muscle of Oncorhynchus Mykiss from the Tishgo River in the Central Andes of Peru
    Autorzy:
    Condor, Andrés
    Custodio, María
    Chanamé, Fernán
    Cuadrado, Walter
    Peñaloza, Richard
    Powiązania:
    https://bibliotekanauki.pl/articles/1839590.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    heavy metals
    arsenic
    water
    sediment
    Oncorhynchus mykiss
    Tishgo river
    Opis:
    The concentration of Cu, Pb, Zn and As in water, sediment and muscle of Oncorhynchus mykiss from the Tishgo river in the central Andes of Peru were analyzed. The water, sediment and fish samples were collected from 36 sites in three sampling sectors. The analytical determination was performed by flame atomic absorption spectrophotometry. The mean Pb concentrations in the water from the three sampling sectors showed significant differences (p < 0.05) which exceeded the values of the Peruvian standard and the WHO. The mean concentrations of Cu, Pb and As in sediment did not present significant differences (p > 0.05) in the three sectors evaluated. The redundancy analysis (RDA) revealed that the concentrations of As and Pb in water, and Cu, As and Zn in sediment significantly influence the concentration of these elements in the O. mykiss muscle. The mean concentrations of Cu, Pb, Zn and As in the O. mykiss muscle were lower than those established by international regulations. Therefore, the concentrations of heavy metals and As recorded in this study do not represent a threat to the consumption of O. mykiss from the Tishgo river.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 4; 156-166
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Space-time quantification of aboveground net primary productivity service supply capacity in high Andean bofedales using remote sensors
    Autorzy:
    Cano, Deyvis
    Crispin, Astrid
    Custodio, María
    Chanamé, Fernán
    Peñaloza, Richard
    Pizarro, Samuel
    Powiązania:
    https://bibliotekanauki.pl/articles/2203552.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Technologiczno-Przyrodniczy
    Tematy:
    aboveground net primary productivity
    ANPP
    bofedales
    ecosystem services
    high Andean wetlands
    MODIS
    Monteith model
    productivity
    remote sensing
    supply capacity
    Opis:
    The aboveground net primary productivity (ANPP) of bofedales is one of the most important indicators for the provision of ecosystem services in the high Andean areas. In the case of bofedales, the evaluation of the ANPP supply capacity as a service on a spatial and temporal scale through remote sensing has been little addressed. The capacity, intra and interannual, to provide the ANPP of the high Andean wetlands was quantified at a spatial and temporal level through remote sensing. The normalized difference vegetation index (NDVI) of the MODIS sensor was used according to the Monteith model (1972), product of the incident photosynthetically active radiation, fraction of the absorbed radiation, and the efficiency of using the radiation of the calibrated vegetation with dry matter sampling in the field. Results show an ANPP prediction R 2 of 0.52 (p < 0.05), with no significant spatial difference between field samples. When applying the model, the intra-annual temporary ANPP supply capacity presents a maximum average of 160.54 kg DM·ha -1·month -1 in the rainy season (December-May) and a maximum average of 81.17 kg DM·ha -1·month in the dry season (June-October). In 2003-2020, the interannual temporary capacity presented values of 1100-1700 kg DM·ha -1·year -1. This makes it possible not to affect the sustainability of the wetlands and prevent their depletion and degradation. Understanding the ANPP supply capacity of bofedales can favour the efficient use of the resource and indirectly benefit its conservation.
    Źródło:
    Journal of Water and Land Development; 2023, 56; 172--181
    1429-7426
    2083-4535
    Pojawia się w:
    Journal of Water and Land Development
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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