Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia)
We studied spatio-temporal distribution of hyporheic invertebrate community at the stream-reach scale in the River Bača on three sampling occasions (January, March, May) in 2005. On each sampling occasion, invertebrates were collected from the shallow hyporheic zone (RB1; depth 30-60 cm, 3 replicat...
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University of Ljubljana Press (Založba Univerze v Ljubljani)
2011-06-01
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| Series: | Natura Sloveniae |
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| Online Access: | https://journals.uni-lj.si/NaturaSloveniae/article/view/16826 |
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| author | Nataša Mori Anton Brancelj |
| author_facet | Nataša Mori Anton Brancelj |
| author_sort | Nataša Mori |
| collection | DOAJ |
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We studied spatio-temporal distribution of hyporheic invertebrate community at the stream-reach scale in the River Bača on three sampling occasions (January, March, May) in 2005. On each sampling occasion, invertebrates were collected from the shallow hyporheic zone (RB1; depth 30-60 cm, 3 replicates), and deeper hyporheic zone (RB2; depth 60-90 cm, 2 replicates) in the river bed, and adjacent gravel bar (GB; depth 60-90 cm, 3 replicates) using Bou-Rouch piston pump. Concurrently, temperature, conductivity and oxygen were measured in the surface water and in hyporheic water at each sampling station. Differences in hyporheic community between dates and habitats were analysed by using two-way ANOVA (dates and habitats as fixed factors) and explored by principal component analysis (PCA). Altogether, 21,657 specimens from 63 taxa were collected. Cyclopoida juveniles, Leuctra sp. (Plecoptera), Chironomidae (Diptera), Acanthocyclops vernalis (Fischer, 1853) and Diacyclops languidus (G. O. Sars, 1863) were the most abundant in the samples. Two-way ANOVA showed significant differences between habitats (RB1 and GB), but no differences between dates when using taxonomic richness as dependent variable. No differences between habitats and dates were calculated when invertebrate densities were applied. PCA of hyporheic invertebrate data showed a gradient in community composition from shallow hyporheic zone (RB1) to deeper hyporheic zone (RB2) and gravel bar (GB). The differences were most probably due to different sediment composition in the studied habitats and less frequent disturbances due to floods in deeper layers and lateral gravel bars.
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| format | Article |
| id | doaj-art-af6bc88a8bd9418cae870d79e324297e |
| institution | Kabale University |
| issn | 1580-0814 1854-3081 |
| language | English |
| publishDate | 2011-06-01 |
| publisher | University of Ljubljana Press (Založba Univerze v Ljubljani) |
| record_format | Article |
| series | Natura Sloveniae |
| spelling | doaj-art-af6bc88a8bd9418cae870d79e324297e2025-01-29T20:49:51ZengUniversity of Ljubljana Press (Založba Univerze v Ljubljani)Natura Sloveniae1580-08141854-30812011-06-0113110.14720/ns.13.1.25-38Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia)Nataša Mori0Anton Brancelj1Department of Freshwater and Terrestrial Ecosystems Research, National Institute of Biology, Večna pot 111, SI-1001 LjubljanaDepartment of Freshwater and Terrestrial Ecosystems Research, National Institute of Biology, Večna pot 111, SI-1001 Ljubljana We studied spatio-temporal distribution of hyporheic invertebrate community at the stream-reach scale in the River Bača on three sampling occasions (January, March, May) in 2005. On each sampling occasion, invertebrates were collected from the shallow hyporheic zone (RB1; depth 30-60 cm, 3 replicates), and deeper hyporheic zone (RB2; depth 60-90 cm, 2 replicates) in the river bed, and adjacent gravel bar (GB; depth 60-90 cm, 3 replicates) using Bou-Rouch piston pump. Concurrently, temperature, conductivity and oxygen were measured in the surface water and in hyporheic water at each sampling station. Differences in hyporheic community between dates and habitats were analysed by using two-way ANOVA (dates and habitats as fixed factors) and explored by principal component analysis (PCA). Altogether, 21,657 specimens from 63 taxa were collected. Cyclopoida juveniles, Leuctra sp. (Plecoptera), Chironomidae (Diptera), Acanthocyclops vernalis (Fischer, 1853) and Diacyclops languidus (G. O. Sars, 1863) were the most abundant in the samples. Two-way ANOVA showed significant differences between habitats (RB1 and GB), but no differences between dates when using taxonomic richness as dependent variable. No differences between habitats and dates were calculated when invertebrate densities were applied. PCA of hyporheic invertebrate data showed a gradient in community composition from shallow hyporheic zone (RB1) to deeper hyporheic zone (RB2) and gravel bar (GB). The differences were most probably due to different sediment composition in the studied habitats and less frequent disturbances due to floods in deeper layers and lateral gravel bars. https://journals.uni-lj.si/NaturaSloveniae/article/view/16826stream reachhyporheic zoneinvertebratesdistributioncommunity compositionspatial and temporal distribution |
| spellingShingle | Nataša Mori Anton Brancelj Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia) Natura Sloveniae stream reach hyporheic zone invertebrates distribution community composition spatial and temporal distribution |
| title | Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia) |
| title_full | Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia) |
| title_fullStr | Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia) |
| title_full_unstemmed | Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia) |
| title_short | Spatial and temporal variability of hyporheic invertebrate community within a stream reach of the River Bača (W Slovenia) |
| title_sort | spatial and temporal variability of hyporheic invertebrate community within a stream reach of the river baca w slovenia |
| topic | stream reach hyporheic zone invertebrates distribution community composition spatial and temporal distribution |
| url | https://journals.uni-lj.si/NaturaSloveniae/article/view/16826 |
| work_keys_str_mv | AT natasamori spatialandtemporalvariabilityofhyporheicinvertebratecommunitywithinastreamreachoftheriverbacawslovenia AT antonbrancelj spatialandtemporalvariabilityofhyporheicinvertebratecommunitywithinastreamreachoftheriverbacawslovenia |