Deadwood in piles or distributed : does it make any difference to saproxylic beetles?
Piles of deadwood are often retained in forests after management to support the biodiversity of saproxylic organisms which depend on deadwood to survive. Any knowledge about the crucial role of piles as suitable habitat of saproxylic organisms compared to single distributed deadwood objects that are...
| Autor principal: | |
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| Formato: | H2 |
| Lenguaje: | Inglés sueco |
| Publicado: |
SLU/Dept. of Ecology
2011
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| Materias: |
| _version_ | 1855570586920550400 |
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| author | Eslamifar, Shermin |
| author_browse | Eslamifar, Shermin |
| author_facet | Eslamifar, Shermin |
| author_sort | Eslamifar, Shermin |
| collection | Epsilon Archive for Student Projects |
| description | Piles of deadwood are often retained in forests after management to support the biodiversity of
saproxylic organisms which depend on deadwood to survive. Any knowledge about the crucial role of
piles as suitable habitat of saproxylic organisms compared to single distributed deadwood objects that
are around the piles would help conservation actors to motivate more forest owners to support
saproxylic organisms during their management. Therefore to give facts to this the saproxylic fauna of
different pile positions (up and low) was studied and compared to distributed deadwood samples
around each pile. Our study was focused on saproxylic beetles. Some other parameters such as
diameter, deadwood volume, pile volume and decay stage were assessed to define any effect. Our
study was done in a small part of urban forests in Uppsala. We collected pair-wise samples: one from
pile consisting of two up and low sub-samples and one from distributed deadwood. Saproxylic beetles
were reared indoors in rearing boxes for three months and determined. In total we recorded 106
individuals of 55 different species. The results showed that position, diameter and deadwood volume
of the samples were not affecting species density or individual density of saproxylic beetles. However
pile volume was positively related with individual density. Presence of the most decayed wood was
positively related with species density. According to our results we concluded pile deadwood is useful
for saproxylic beetles compared to distributed deadwood and saproxylic beetles are more frequent in
bigger piles with presence of the most decayed wood.
Keywords: Saproxylic beetles, Pile, position, Deadwood, Wood living, connectivity, volume,
diameter, Quality, Distributed, Scattered, Accumulated, Stage of decay, Conservation, Biodiversity,
Red-listed, Forest management, Boreo-nemoral forest, Sweden.
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| format | H2 |
| id | RepoSLU3772 |
| institution | Swedish University of Agricultural Sciences |
| language | Inglés swe |
| publishDate | 2011 |
| publishDateSort | 2011 |
| publisher | SLU/Dept. of Ecology |
| publisherStr | SLU/Dept. of Ecology |
| record_format | eprints |
| spelling | RepoSLU37722012-04-20T14:24:30Z Deadwood in piles or distributed : does it make any difference to saproxylic beetles? Död ved i högar eller utspritt : gör det någon skillnad för vedlevande skalbaggar? Eslamifar, Shermin Saproxylic beetles, Sweden Forest management, Boreo-nemoral forest Pile, Position Deadwood, Red-listed Wood living, Forest management Connectivity, volume, diameter, Quality, Distributed, Scattered. Accumulated, Stage of decay, Conservation, Biodiversity, Piles of deadwood are often retained in forests after management to support the biodiversity of saproxylic organisms which depend on deadwood to survive. Any knowledge about the crucial role of piles as suitable habitat of saproxylic organisms compared to single distributed deadwood objects that are around the piles would help conservation actors to motivate more forest owners to support saproxylic organisms during their management. Therefore to give facts to this the saproxylic fauna of different pile positions (up and low) was studied and compared to distributed deadwood samples around each pile. Our study was focused on saproxylic beetles. Some other parameters such as diameter, deadwood volume, pile volume and decay stage were assessed to define any effect. Our study was done in a small part of urban forests in Uppsala. We collected pair-wise samples: one from pile consisting of two up and low sub-samples and one from distributed deadwood. Saproxylic beetles were reared indoors in rearing boxes for three months and determined. In total we recorded 106 individuals of 55 different species. The results showed that position, diameter and deadwood volume of the samples were not affecting species density or individual density of saproxylic beetles. However pile volume was positively related with individual density. Presence of the most decayed wood was positively related with species density. According to our results we concluded pile deadwood is useful for saproxylic beetles compared to distributed deadwood and saproxylic beetles are more frequent in bigger piles with presence of the most decayed wood. Keywords: Saproxylic beetles, Pile, position, Deadwood, Wood living, connectivity, volume, diameter, Quality, Distributed, Scattered, Accumulated, Stage of decay, Conservation, Biodiversity, Red-listed, Forest management, Boreo-nemoral forest, Sweden. Död ved i högar eller utspritt: Gör det någon skillnad för vedlevande skalbaggar? En vanlig naturvårdsåtgärd för att gynna vedlevande organismer är att lämna högar av ved. Det är oftast klena stammar och grenar som blir över vid huggningar eller som av naturliga orsaker fallit och som ligger olämpligt i en parkmiljö eller betesmark som läggs i högar. Det finns dock i stort sett inga studier som undersökt i vilken grad dessa högar utnyttjas av de organismer som man vill gynna och om den höglagda vedens fauna skiljer sig från samma typ av ved om den ligger utspridd. För att ta reda på hur vedlevande skalbaggar förekommer i högarna samlade jag in prover från 11 dödvedshögar i tätortsnära skog i södra Uppsala. Prover togs från tre ‘positioner’ i eller vid varje hög: ytlagret (up) och bottenlagret (down) samt från utspridd ved i närheten (20-150m från högen). Enbart lövträdsved provtogs och vedens ‘diameter’ och ‘röststadium’ samt ‘högstorlek’ antecknades. Proverna togs genom att fylla 38.5*26*17 cm stora papplådor med buntar av ca 35 cm långa vedbitar som sågats in från högarna tidigt i maj. För varje provkategori togs två sådana buntar, ur vilka skalbaggar kläcktes fram inomhus. Totalt kläcktes 106 vedlevande skalbaggar tillhörande 55 olika arter fram. Fyra av dem var rödlistade. ‘Position’ och ‘diameter’ kunde inte påvisas ha någon effekt på artantal eller antal individer per prov. Däremot fann jag fler individer av vedskalbaggar per prov i stora högar. Det fanns också fler arter per prov där ved i de mest rötade successionsstadierna fanns. De positiva sambanden med högstorlek och rötad ved tyder på att stora högar som legat längre innehåller fler vedskalbaggar, kanske som en effekt av att högen successivt koloniseras av nya arter. Det höga artantalet, inte minst av rödlistade arter, visar att högarna utnyttjas och har positiv naturvårdsnytta, men att vedens nytta inte verkar påverkas av om veden ligger i högar eller är utspridd. SLU/Dept. of Ecology 2011 H2 eng swe https://stud.epsilon.slu.se/3772/ |
| spellingShingle | Saproxylic beetles, Sweden Forest management, Boreo-nemoral forest Pile, Position Deadwood, Red-listed Wood living, Forest management Connectivity, volume, diameter, Quality, Distributed, Scattered. Accumulated, Stage of decay, Conservation, Biodiversity, Eslamifar, Shermin Deadwood in piles or distributed : does it make any difference to saproxylic beetles? |
| title | Deadwood in piles or distributed : does it make any difference to saproxylic beetles? |
| title_full | Deadwood in piles or distributed : does it make any difference to saproxylic beetles? |
| title_fullStr | Deadwood in piles or distributed : does it make any difference to saproxylic beetles? |
| title_full_unstemmed | Deadwood in piles or distributed : does it make any difference to saproxylic beetles? |
| title_short | Deadwood in piles or distributed : does it make any difference to saproxylic beetles? |
| title_sort | deadwood in piles or distributed : does it make any difference to saproxylic beetles? |
| topic | Saproxylic beetles, Sweden Forest management, Boreo-nemoral forest Pile, Position Deadwood, Red-listed Wood living, Forest management Connectivity, volume, diameter, Quality, Distributed, Scattered. Accumulated, Stage of decay, Conservation, Biodiversity, |