Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration
The distribution of leaf litter and benthic macroinvertebrates was studied in two boreal streams: a stream with a natural streambed (Merenoja), a channelized stream (Rutajoki), and the latter stream after its restoration. Leaf release experiments were performed to characterise the retentive structur...
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Boreal Environment Research Publishing Board
2024
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Online Access: | http://hdl.handle.net/10138/578183 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/578183 2024-09-15T18:00:09+00:00 Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration Haapala, A. Muotka, T. Laasonen, P. 2024-06-27T13:44:48Z 19-30 application/pdf http://hdl.handle.net/10138/578183 eng eng Boreal Environment Research Publishing Board Boreal Environment Research 1239-6095 1797-2469 1 8 http://hdl.handle.net/10138/578183 Suomen ympäristökeskus CC BY 4.0 openAccess Artikkeli lehdessä 2024 ftunivhelsihelda 2024-08-21T23:48:04Z The distribution of leaf litter and benthic macroinvertebrates was studied in two boreal streams: a stream with a natural streambed (Merenoja), a channelized stream (Rutajoki), and the latter stream after its restoration. Leaf release experiments were performed to characterise the retentive structures of each stream. Benthic samples were collected from patches that retained artificial leaves (`retention sites') and from randomly located patches (`random sites'). Retention sites contained significantly more benthic leaves than random sites in each stream, but the difference between patch types was most distinct in the channelized stream. Densities of shredders and other detritivores were distinctly higher in retention than in random sites in Rutajoki, both before and after restoration. In Merenoja, shredders were evenly distributed among the patch types. Restoration clearly increased the trapping efficiency of Rutajoki, but only slightly reduced the aggregation of detritivores to retentive stream patches. Our study highlights the importance of detritus aggregations for stream invertebrates, especially in channelized streams. Article in Journal/Newspaper Boreal Environment Research HELDA – University of Helsinki Open Repository |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
description |
The distribution of leaf litter and benthic macroinvertebrates was studied in two boreal streams: a stream with a natural streambed (Merenoja), a channelized stream (Rutajoki), and the latter stream after its restoration. Leaf release experiments were performed to characterise the retentive structures of each stream. Benthic samples were collected from patches that retained artificial leaves (`retention sites') and from randomly located patches (`random sites'). Retention sites contained significantly more benthic leaves than random sites in each stream, but the difference between patch types was most distinct in the channelized stream. Densities of shredders and other detritivores were distinctly higher in retention than in random sites in Rutajoki, both before and after restoration. In Merenoja, shredders were evenly distributed among the patch types. Restoration clearly increased the trapping efficiency of Rutajoki, but only slightly reduced the aggregation of detritivores to retentive stream patches. Our study highlights the importance of detritus aggregations for stream invertebrates, especially in channelized streams. |
format |
Article in Journal/Newspaper |
author |
Haapala, A. Muotka, T. Laasonen, P. |
spellingShingle |
Haapala, A. Muotka, T. Laasonen, P. Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration |
author_facet |
Haapala, A. Muotka, T. Laasonen, P. |
author_sort |
Haapala, A. |
title |
Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration |
title_short |
Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration |
title_full |
Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration |
title_fullStr |
Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration |
title_full_unstemmed |
Distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration |
title_sort |
distribution of benthic macroinvertebrates and leaf litter in relation to streambed retentivity: implications for headwater stream restoration |
publisher |
Boreal Environment Research Publishing Board |
publishDate |
2024 |
url |
http://hdl.handle.net/10138/578183 |
genre |
Boreal Environment Research |
genre_facet |
Boreal Environment Research |
op_relation |
Boreal Environment Research 1239-6095 1797-2469 1 8 http://hdl.handle.net/10138/578183 Suomen ympäristökeskus |
op_rights |
CC BY 4.0 openAccess |
_version_ |
1810437265147559936 |