| 1. |
- Arrhenius, Birgit, et al.
(författare)
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En bildsten revideras
- 1960
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Ingår i: Fornvännen. - 0015-7813 .- 1404-9430. ; , s. 173-192
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Holmqvist, Niklas, et al.
(författare)
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Lake trophic status and bioaccumulation of polychlorinated biphenyls in benthic organisms: a comparison between littoral and profundal invertebrates
- 2005
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Ingår i: Canadian Journal of Fisheries and Aquatic Sciences. - 1205-7533. ; 62:6, s. 1201-1209
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Tidskriftsartikel (refereegranskat)abstract
- We investigated the influence of lake trophic status on accumulation of polychlorinated biphenyls (PCBs) in littoral and profundal invertebrates from 19 lakes in southern Sweden. The PCB concentration in profundal chironomids (Chironomus sp.) was negatively correlated with lake trophy but the concentration in littoral crayfish (Pacifasticus leniusculus) was unrelated to shifting nutrient regimes. PCB concentrations in chironomids were negatively correlated, while crayfish did not correlate with lake total phosphorus. Two findings indicate that different processes determine bioaccumulation in littoral and profundal invertebrates: (i) a lack of correlation between PCB concentrations in crayfish and chironomids within lakes and (ii) some differences in congener distribution in the two species. We suggest a possible explanation in that chironomids are directly exposed to settling material from the pelagic zone, while crayfish are omnivorous and feed mainly in the littoral zone. A intensive investigation on one pond population could not reveal any individual factors, such as lipid content, size, or sex, influencing bioaccumulation of PCBs in crayfish.
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| 3. |
- Holmqvist, Niklas, et al.
(författare)
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Persistent organic pollutants (POP) in a benthic omnivore - A comparison between lake and stream crayfish populations
- 2007
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Ingår i: Chemosphere. - : Elsevier BV. - 1879-1298 .- 0045-6535. ; 66:6, s. 1070-1078
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Tidskriftsartikel (refereegranskat)abstract
- We investigated the accumulation of PCB and DDT in crayfish populations in 10 streams in southern Sweden. The results were compared with an earlier study on crayfish in lakes from the same area. We found that the concentration of pollutants in crayfish did not differ between the two types of systems. Variation in body burden was higher in stream living crayfish probably because of the higher influence from pollutants deposited in the catchment area and the more dynamic transport in streams. In streams, pp'-DDE concentrations were positively correlated to trophic status (total phosphorous) while PCB did not show any correlation with the nutrient regime. Further, mean Sigma PCB and p,p'-DDE concentrations in crayfish did not correlate in streams. We suggest that the sources of the two pollutants differ for stream living crayfish. The results indicate that crayfish in streams are affected to a higher degree to pollutants in the catchment area and the precipitation regime. In lakes, internal processes govern uptake of pollutants in crayfish.
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| 4. |
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| 5. |
- Holmqvist, Wilhelm
(författare)
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Den konsthistoriska kongressen i Linz
- 1950
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Ingår i: Fornvännen. - 0015-7813 .- 1404-9430. ; 45, s. 40-42
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 6. |
- Holmqvist, Wilhelm
(författare)
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Den nordiska sfinxen
- 1958
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Ingår i: Fornvännen. - 0015-7813 .- 1404-9430. ; 53, s. 225-240
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 7. |
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| 8. |
- Holmqvist, Wilhelm
(författare)
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Den tidiga staden
- 1973
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Ingår i: Fornvännen. - 0015-7813 .- 1404-9430. ; 68, s. 49-51
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Holmqvist, Wilhelm, et al.
(författare)
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Diskussion kring Valsgärde 7
- 1978
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Ingår i: Fornvännen. - 0015-7813 .- 1404-9430. ; 73, s. 180-193
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 10. |
- Holmqvist, Wilhelm
(författare)
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Dryckeshornen från Söderby-Karl
- 1951
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Ingår i: Fornvännen. - 0015-7813 .- 1404-9430. ; , s. 33-65
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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