The Taro and Ticino rivers were sampled (maximum 15 cm depth) for nematodes during 1 year at three sites for each river and some ecological parameters were measured. The yearly mean abundance of nematodes in the river Taro was 23 individuals/10 cm2 and in the river Ticino 79 individuals/10 cm2. In the two rivers five to 15 and three to ten species, respectively, were found. The highest station (Taro 1) of the river Taro was significantly different from all the other Taro and Ticino stations both for number and species composition: bacterial feeders were the dominant group in Taro 1 (mean Maturity Index (MI) was 2.25), whereas unicellular eukaryote feeders dominated the other Taro and Ticino sites (mean MI of 2.85). Chromadorina bioculata was the most common species in both rivers, except at Taro 1, where Eumonhystera dispar dominated. Significant correlations were found between conductivity and unicellular eukaryote feeders and bacterial feeders. For the first time the Distinctness Index δ+ is used for freshwater nematodes. Comparing our communities with other Italian rivers (data taken from the literature), we detected significant differences between polluted and not polluted habitats.
Purchase
Buy instant access (PDF download and unlimited online access):
Institutional Login
Log in with Open Athens, Shibboleth, or your institutional credentials
Personal login
Log in with your brill.com account
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 423 | 100 | 13 |
| Full Text Views | 114 | 1 | 0 |
| PDF Views & Downloads | 25 | 1 | 0 |
The Taro and Ticino rivers were sampled (maximum 15 cm depth) for nematodes during 1 year at three sites for each river and some ecological parameters were measured. The yearly mean abundance of nematodes in the river Taro was 23 individuals/10 cm2 and in the river Ticino 79 individuals/10 cm2. In the two rivers five to 15 and three to ten species, respectively, were found. The highest station (Taro 1) of the river Taro was significantly different from all the other Taro and Ticino stations both for number and species composition: bacterial feeders were the dominant group in Taro 1 (mean Maturity Index (MI) was 2.25), whereas unicellular eukaryote feeders dominated the other Taro and Ticino sites (mean MI of 2.85). Chromadorina bioculata was the most common species in both rivers, except at Taro 1, where Eumonhystera dispar dominated. Significant correlations were found between conductivity and unicellular eukaryote feeders and bacterial feeders. For the first time the Distinctness Index δ+ is used for freshwater nematodes. Comparing our communities with other Italian rivers (data taken from the literature), we detected significant differences between polluted and not polluted habitats.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 423 | 100 | 13 |
| Full Text Views | 114 | 1 | 0 |
| PDF Views & Downloads | 25 | 1 | 0 |