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- Eriksson, Mats O.G., et al.
(författare)
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Breeding success of the Black-throated Diver Gavia arctica inside and outside bird sanctuaries in Lakes Fegen and Sottern
- 2005
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Ingår i: ORNIS SVECICA. ; 15, s. 212-219
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Tidskriftsartikel (refereegranskat)abstract
- We compared the breeding success of Black-throated Divers Gavia arctica inside and outside bird sanctuaries with restricted public access during the incubation period in Lake Fegen-Svansjöarna and Lake Sottern, South Sweden. Both lakes held populations of approximately 15–20 pairs. At Fegen-Svansjöarna, average breeding success was 0.51 large chicks per pair and year inside and 0.27 outside the sanctuaries (field surveys in 1983–1984 and 1997–2000). The difference was not statistically significant, however, and in two out of the six study years breeding success was higher outside the bird sanctuaries. At Sottern, breeding success was 0.39 and 0.25 large chicks per pair and year inside and outside the bird sanctuary, but breeding success was higher inside the sanctuary only in four out of nine years, 1997–2005. The results from the two lakes together indicated an overall positive effect (P = 0.08). We recommend keeping a constant water-level during incubation to be the primary measure to enhance breeding success. Sanctuaries with limited access may be an additional benefit at lakes highly frequented for out-door recreation.
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- Eriksson, Mats O.G., et al.
(författare)
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Mercury exposure to Red-throated Divers Gavia stellata and Black-throated Divers Gavia arctica in Sweden. : Kvicksilverbelastningen hos svenska smålommar Gavia stellata och storlommar Gavia arctica
- 2005
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Ingår i: ORNIS SVECICA. ; 15, s. 1-12
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Tidskriftsartikel (refereegranskat)abstract
- We investigated concentration of mercury in eggs of Redthroated Diver Gavia stellata and Black-throated Diver Gavia arctica collected in South and Central Sweden, 1981–1997. In South Sweden (Sydsvenska Höglandet), mean concentration in Red-throated Diver eggs was remarkably high (6.84 ppm dry weight, 5 pairs), or more than three times as high as in Black-throated Diver eggs (2.11 ppm dry weight, 16 pairs). In Central Sweden (Svealand), the concentration in Red-throated Diver eggs (3.04 ppm dry weight, 8 pairs) was significantly lower than in South Sweden, but still higher than in Blackthroated Diver eggs (1.21 ppm dry weight, 5 pairs). In Black-throated, but not in Red-throated Diver, there was higher mercury concentrations in eggs from pairs fishing in lakes affected by acidification. We found no relationship between mercury and breeding success, although concentrations in single Red-throated Diver eggs exceeded the level associated with high risk of impaired reproduction. We recommend that mercury concentration of diver eggs should be further monitored, with reference to the risks of increased exposure, related to leakage from terrestrial deposits of air-borne transmissions to freshwater habitats.
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- Eriksson, M.O.G., et al.
(författare)
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Projekt Lom 1999. Fågelåret 1999.
- 2000
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Ingår i: SOF 2000. Fågelåret 1999. Stockholm. ; , s. 34-39
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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- Eriksson, M.O.G., et al.
(författare)
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Projekt Lom 2000. Fågelåret 2000.
- 2001
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Ingår i: SOF 2001. Fågelåret 2000. Stockholm. ; , s. 46-53
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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- Eriksson, M.O.G., et al.
(författare)
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Projekt Lom 2001. Fågelåret 2001
- 2002
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Ingår i: SOF 2002. Fågelåret 2001. Stockholm. ; , s. 47-55
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Olofsson, Anders D., 1973-, et al.
(författare)
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Lärares professionella utveckling på nätet
- 2011
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Ingår i: Mer om nätbaserad utbildning. - Lund : Studentlitteratur. - 9789144068060 ; , s. 195-214
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Bokkapitel (refereegranskat)abstract
- Innehåll:KAPITEL 11 Lärares professionella utveckling på nätet 195 Anders D Olofsson och J Ola Lindberg Nätbaserade lärgemenskaper 196 Sex olika nätbaserade lärgemenskaper 198 The Inquiry Learning Forum 199 Transformation Teachers Programme 200 Florida Online Reading Professional Development 201 Lektionse 202 MirandaNet Fellowship 203 Pedanet – skolnätverk 204 Gemensamma teman 205 Möjligheter till förändring 210 Sammanfattning 211 Webbstöd 212 Litteratur 213
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