Assessing the sensitivity of leeches as indicators of water quality
- Cortelezzi, Agustina
- Gullo, Bettina
- Simoy, Maria Veronica
- Cepeda, Rosana Esther
- Marinelli, Claudia Beatriz
- Rodrigues Capitulo, Alberto
- Berkunsky, Igor
DOIAbstract
The objective of this work was assessing the sensitivity of leeches to several water quality attributes in lowlands streams. We used occupancy modelling that account explicitly for detectability, to estimate the influence of four variables (dissolved oxygen, 5-days biochemicals oxygen demand, conductivity, and dissolved inorganic nitrogen) affecting nine species. We described the sensitivity as a change in the occupancy along the range of water quality attributes. We found at least one species of Helobdella in 81% of sites and Helobdella, as genus, was detected along the entire gradient of each attribute. However, differences in the sensitivity were observed between species. For example, if we analyse the sensitivity of the genus Helobdella...
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