M. Tjernberg’s scientific contributions

The black woodpecker - a key-species in European forests

Density of black woodpecker was examined and reproductive data collected, in a forest landscape area (128 km2) and in a farmland area (123 km2) with highly fragmented forests (26% forest), in C Sweden during 1985-1990. Densities (c0.15 territorial pairs/km2 of forest land) were the same in the forest area and in the farmland area with highly fragmented forests. There were no differences in reproductive rate, predation rate, body conditions of the young, or the breeding times between the two areas. The frequency distribution based on the duration in years of the territory occupation was also the same. -from Authors

Article

11 Reads

10 Citations

Density variation and breeding success of the black woodpecker Dryocopus martius in relation to forest fragmentation

... Only GSW, WT and CT have generally smaller breeding territories than the median value of our study plots (Ekman 1979;Cramp 1985;Cramp and Perrins 1993;Michalek and Miettinen 1993;Karlsson 1994;Rolstad et al. 1995;Siffczyk et al. 2003). For the other cavity-making species, the sizes of study plots are approximately of the same size or slightly smaller (TTW, LSW;Cramp 1985;Höntsch 1996;Wiktander et al. 2001;Pakkala et al. 2002;Pechacek 2004;Pechacek and d'Oleire-Oltmanns 2004) or clearly smaller compared with their breeding territory sizes (BW, GHW, WBW; Cramp 1985;Tjernberg et al. 1993;Ahola 1995;Blume 1996;Rolstad et al. 2000;Campion et al. 2020;Pakkala et al. 2020). Outside the breeding season all abovementioned species also use the surrounding forests. ...
Reference:
The intensity of forest management affects the nest cavity production of woodpeckers and tits in mature boreal forests

Citing Article
January 1993

The black woodpecker - a key-species in European forests

... Se considera al picamaderos negro Dryocopus martius (Linnaeus, 1758) una especie clave de los ecosistemas forestales porque proporciona cavidades que son utilizadas por otros vertebrados cuyas necesidades ecológicas se ven limitadas por las prácticas intensivas de la silvicultura moderna (Johnson et al., 1990;Rolstad et al., 2000;Mikusinski et al., 2001, Konsinski et al., 2010. Es un pájaro carpintero ampliamente distribuido por el Paleártico, desde el norte de la península Ibérica hasta Japón. ...
Reference:
PicamaderosNegro

Citing Article