- Tytuł:
- Freshwater biodiversity crisis: macroinvertebrates’ response along the downstream gradient to receiving effluent from a wastewater treatment plant
- Autorzy:
-
Kędzior, R.
Dacewicz, E.
Ziernicka-Wojtaszek, A.
Chmielowski, K. - Powiązania:
- https://bibliotekanauki.pl/articles/53639055.pdf
- Data publikacji:
- 2023
- Wydawca:
- Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
- Opis:
- Suburban watercourses receiving sewage effluents often are low-flow and not modified, unlike large rivers to which wastewater is discharged. The impact of chemical pollutants on biodiversity as well as the effectiveness of ecosystem recovery and self-purification are worth careful attention. The aim was to assess the macroinvertebrates’ responses to receiving an input from a wastewater treatment plant (WWTP) along the downstream gradient. We studied the variability and recovery pattern of macroinvertebrates in six sections located along a sewage receiving stream continuum. The comparison of chemical parameters showed significant differences in the pH, BOD5, N-NH4+ and PO43-. At sites 100, 300 and 500 m downstream of the WWTP, the persistently high amount of pathogenic coliform bacteria testified to the high impact of bacteriological pollution of sewage on the receiver. Based on 18013 macroinvertebrates, nonmetric multidimensional scaling showed differences between the assemblages at the sections upstream of the WWTP, and located downstream. Effluent discharge affected the macroinvertebrate, causing a decrease of its quantitative index (abundance) by 7% and qualitative index (EPT) by 26% at the site of the sewage discharge. The recovery pattern was manifested by the gradual increase in macoinvertebrate indices at the sites located downstream from the WWTP, which at distances of 300 m and 500 m from the discharge site attained comparable values to those at the reference sites upstream of the WWTP. The populations of the most sensitive taxa were not fully restored with increasing distance from the WWTP, even at a distance of 500 meters, but instead were replaced by more resistant taxa. More attention should be paid to the impact of wastewater discharge from suburban wastewater treatment plants on receiving watercourse biodiversity and ecological water conditions, especially in the case of small and lowflow sewage receivers, where self-purification processes are difficult.
- Źródło:
-
Journal of Elementology; 2023, 28, 4; 1311-1328
1644-2296 - Pojawia się w:
- Journal of Elementology
- Dostawca treści:
- Biblioteka Nauki