TY - JOUR

T1 - Ynglefuglene i små uberørte skovbevoksninger

T2 - en sammenligning

AU - Kepfer Rojas, Sebastian

AU - Byriel, David Bille

AU - Brøgger-Jensen, Steffen

PY - 2017

Y1 - 2017

N2 - Crane flies were caught with a sweep net in 66 unmanaged and 57 managed collec- tion circles (706 m2) at 7 different forest areas. The sampling took place in June, July and September in 2015 where each collection circle was swept for 10 minutes. Crane fly diversity was assessed and the 10 most species rich collection circles (hotspots) in both unmanaged and managed forests were compared. Species richness was higher in unmanaged hotspots, and species composition varied greatly between and within management regime. By dividing crane flies into habitat categories, it was apparent that hotspot circles had a higher average number of crane flies associated with wetland habitats compared to the rest of the collection circles despite management. Further, the average number of crane flies in unmanaged hotspots had more wetland species than in the managed hotspots. This could be due to a limited distribution of wetland habitats in the managed forest due to drainage, and/or differences in structural and biochemical properties such as dead wood, and pH in combination with soil moisture and different wetland characteristics between the managed and unmanaged forests.

AB - Crane flies were caught with a sweep net in 66 unmanaged and 57 managed collec- tion circles (706 m2) at 7 different forest areas. The sampling took place in June, July and September in 2015 where each collection circle was swept for 10 minutes. Crane fly diversity was assessed and the 10 most species rich collection circles (hotspots) in both unmanaged and managed forests were compared. Species richness was higher in unmanaged hotspots, and species composition varied greatly between and within management regime. By dividing crane flies into habitat categories, it was apparent that hotspot circles had a higher average number of crane flies associated with wetland habitats compared to the rest of the collection circles despite management. Further, the average number of crane flies in unmanaged hotspots had more wetland species than in the managed hotspots. This could be due to a limited distribution of wetland habitats in the managed forest due to drainage, and/or differences in structural and biochemical properties such as dead wood, and pH in combination with soil moisture and different wetland characteristics between the managed and unmanaged forests.

M3 - Tidsskriftartikel

VL - 123

SP - 86

EP - 92

JO - Flora og Fauna

JF - Flora og Fauna

SN - 0015-3818

IS - 2-4

ER -