Abstract
In the present paper we investigated macrophyte community structure in 60 natural and impacted stream and river sites distributed throughout the Walloon river network. The objectives were to describe the distribution of macrophyte assemblages in relation to physico‐chemical parameters of their environment and to assess the variability in ecological metrics within these watercourses. Two‐way clustering allowed us to simultaneously assign sample units and species to groups by performing two separate cluster analyses. Indicator species analysis allowed us to assess the degree to which a species indicated a group, based on its constancy and distribution of abundance. Six end‐groups were identified as a result of using two‐ way clustering and indicator species analysis techniques. Hygroamblystegium fluviatile, Chiloscyphus polyanthos and Lemanea fluviatilis were found to characterize acidic and low impacted streams and rivers (G1), while Ranunculus fluitans was found in all low impacted large streams (G2). Potamogeton pectinatus, proved to be more common in eutrophicated waters in the calcareous areas particularly in the ʺLoess low plateauxʺ region (G6). Cinclidotus riparius, Fissidens crassipes and Pellia endiviifolia, appeared in rivers situated in the Condroz region (G4), which was characterized by a high concentration of nitrogen.
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Claims 4
Claim · model-written summary
Hygroamblystegium fluviatile, Chiloscyphus polyanthos and Lemanea fluviatilis characterize acidic and low impacted streams and rivers
- Taxon
- Hygroamblystegium fluviatile, Chiloscyphus polyanthos and Lemanea fluviatilisLemanea fluviatilis
_3413.JPG?width=60)
Chiloscyphus polyanthos_3023.JPG?width=60)
Hygroamblystegium fluviatilee2 - Outcome
- characterize acidic and low impacted streams and rivers (G1)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_3413.JPG?width=500)
_3023.JPG?width=500)
Verbatim
e2“Hygroamblystegium fluviatile, Chiloscyphus polyanthos and Lemanea fluviatilis were found to characterize acidic and low impacted streams and rivers (G1)”
Claim · model-written summary
Ranunculus fluitans was found in all low impacted large streams
- Taxon
- Ranunculus fluitans
Ranunculus fluitanse3 - Outcome
- found in all low impacted large streamse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Ranunculus fluitans was found in all low impacted large streams (G2)”
Claim · model-written summary
Potamogeton pectinatus was more common in eutrophicated waters in calcareous areas
- Taxon
- Potamogeton pectinatus
Stuckenia pectinatae4 - Outcome
- more common in eutrophicated waterse4
- Setting
- calcareous arease4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Potamogeton pectinatus, proved to be more common in eutrophicated waters in the calcareous areas”
Claim · model-written summary
Cinclidotus riparius, Fissidens crassipes and Pellia endiviifolia appeared in rivers of the Condroz region characterized by a high concentration of nitrogen
- Taxon
- Cinclidotus riparius, Fissidens crassipes and Pellia endiviifolia
Cinclidotus riparius_5726.JPG?width=60)
Apopellia endiviifolia.jpg?width=60)
Fissidens crassipese5 - Outcome
- appeared in rivers situated in the Condroz region (G4)e5
- Qualifier
- a high concentration of nitrogene5
- Setting
- Condroz regione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_5726.JPG?width=500)
.jpg?width=500)
Verbatim
e5“Cinclidotus riparius, Fissidens crassipes and Pellia endiviifolia, appeared in rivers situated in the Condroz region (G4), which was characterized by a high concentration of nitrogen”