01983nas a2200169   4500008004100000245009800041210006900139300001000208490000800218520146300226100001401689700001601703700001501719700001501734700001501749856004901764       2007                        eng d00aFactors and scales potentially important for saproxylic beetles in temperate mixed oak forest0 aFactors and scales potentially important for saproxylic beetles   a86-980 v1353 aThe influence of environmental factors on species richness and species composition may be manifested at different spatial levels. Exploring these relationships is important to understand at which spatial scales certain species and organism groups become sensitive to fragmentation and changes in habitat quality. At different spatial scales we evaluated the potential influence of 45 factors (multiple regression, PCA) on saproxylic oak beetles in 21 smaller broadleaved Swedish forests of conservation importance (woodland key habitats, WKH). Local amount of dead wood in forests is often assumed to be important, but two landscape variables, area of oak dominated woodland key habitats within 1 km of sites and regional amount of dead oak wood, were the main (and strong) predictors of variation in local species richness of oak beetles. The result was similar for red-listed beetles associated with oak. Species composition of the beetles was also best predicted by area of oak woodland key habitat within 1 km, with canopy closure as the second predictor. Despite suitable local quality of the woodland key habitats, the density of such habitat patches may in many areas be too low for long-term protection of saproxylic beetles associated with broadleaved temperate forests. Landscapes with many clustered woodland key habitats rich in oak should have high priority for conservation of saproxylic oak beetles. (c) 2006 Elsevier Ltd. All rights reserved.1 aFranc, N.1 aGotmark, F.1 aOkland, B.1 aNorden, B.1 aPaltto, H.  uhttps://sciaroidea.myspecies.info/node/2679600745nas a2200145   4500008004100000245010600041210006900147300001200216490000700228653006100235653016500296653003900461100001500500856008400515       1996                        eng d00aUnlogged forests: important sites for preserving the diversity of mycetophilids (Diptera: Sciaroidea)0 aUnlogged forests important sites for preserving the diversity of  a297-3100 v7610aconservation implications; FOREST-AND-WOODLAND; Unlogged10aSciaroidea; CONSERVATION-; Species diversity ; &;  abundance in unlogged forest significance; SPECIES-DIVERSITY; POPULATION-SIZE; Importance of unlogged forests10aspecies diversity ; &;  abundance;1 aOkland, B.  uhttp://www.online-keys.net/sciaroidea/1991_2000/Okland_1996_unlogged_forest.pdf02732nas a2200301   4500008004100000245010000041210006900141300000900210490000800219520171100227653001801938653003401956653001601990653009502006653001902101653004602120653001302166653001802179653000902197653001902206100001802225700001902243700001802262700001802280700001802298700002002316856009402336       2005                        eng d00aRegional diversity of mycetophilids (Diptera: Sciaroidea) in Scandinavian oak-dominated forests0 aRegional diversity of mycetophilids Diptera Sciaroidea in Scandi  a9-200 v1213 aMycetophilids is a species-rich insect group for which the ecological requirements in temperate forests are poorly understood. This study of mycetophilids was based on trap samples from 15 oak-dominated sites in the boreonemoral zone of southern Sweden. Species richness and composition were analysed in relation to environmental variables at a local and at larger scales (multiple regression), and compared to results from similar studies in spruce-dominated sites in the boreal zone of Norway (PCA and two-sample t tests). Regressions showing a dominance of regional factors over local in-site variables agree with species-richness models assuming that local communities most often are unsaturated. Precipitation (inter-correlated with elevation) was the strongest factor for explaining the variation in species-richness, which is consistent with previous results indicating that mycetophilids are disfavoured by drought. In addition to precipitation, the area of mixed forest with high biodiversity values (woodland key habitats and protected areas) was a positive factor for species-richness, probably because such habitats combine elements of both coniferous and deciduous forests. PCA ordination revealed a clear separation of the species composition between boreal and boreonemoral forests. Species-richness in boreal forest was significantly higher than in boreonemoral forest, indicating a preference for boreal habitats in many of the species. For mycetophilids and other drought-sensitive insects, it is suggested that (partial) cutting in some dense successional oak stands should be avoided, and that some invading spruces should be tolerated. Copyright 2004 Elsevier Ltd. All rights reserved.10aAngiospermae-10aAnimalia-; [26070-] Fagaceae-10aArthropoda-10aBiodiversity-; Biogeography-: Population-Studies; Forestry-; Terrestrial-Ecology: Ecology-10aDicotyledones-10aEnvironmental-Sciences; [75314-] Diptera-10aInsecta-10aInvertebrata-10aPlan10aSpermatophyta-1 aOkland, Bjorn1 aGotmark, Frank1 aNorden, Bjorn1 aFranc, Niklas1 aKurina, Olavi1 aPolevoi, Alexei  uhttp://www.online-keys.net/sciaroidea/2000_/Okland_et_al_2005_regional_Mycetophilidae.pdf02457nas a2200361   4500008004100000245010800041210006900149300001000218490000800228520100500236653001801241653003901259653013401298653001601432653001601448653005501464653001301519653001301532653001801545653004901563653018701612653001401799653002101813653003201834653001201866653001901878653002001897653004001917100002201957700002401979700002402003856006802027       2001                        eng d00aImpacts of the weed Tradescantia fluminensis on insect communities in fragmented forests in New Zealand0 aImpacts of the weed Tradescantia fluminensis on insect communiti  a31-460 v1023 aThe impact of the weed Tradescantia fluminensis on insect communities, as represented by Malaise-trapped beetles (Coleoptera) and fungus gnats (Diptera: Mycetophilidae s. l.), was studied in three forest fragments. Each fragment contained three plots with and without a dense weed cover. Data on vegetation and habitat variables were collected. Twinspan and Decorana analyses separated the plots by fragment for fungus gnat communities, and nearly so for the presence/absence of beetle species. The fungus gnat communities separated into plots with and without tradescantia at two sites, and there were fewer species of fungus gnats and beetles in tradescantia plots at the site with the simplest habitat structure. The richness of beetle and fungus gnat species was correlated with vascular plant richness. As tradescantia is known to prevent regeneration of many native plants, we predict a corresponding decline in invertebrate diversity and fragment complementarity where the weed is established.10aAngiospermae-10aAnimalia-; [25260-] Commelinaceae-10aAnimalia-; beetle- (Coleoptera-); Tradescantia-fluminensis (Commelinaceae-): weed-; fungus-gnat (Diptera-); Coleoptera-: Animals-10aArthropoda-10aArthropods-10aBiodiversity-; Conservation-; [75304-] Coleoptera-10aInsecta-10aInsects-10aInvertebrata-10aInvertebrates-; Commelinaceae-: Angiosperms-10aInvertebrates-; New-Zealand: Australasian-region; Decorana-analysis: analytical-method; Twinspan-analysis: analytical-method; fragmented-forests; insect-communities; species-richness10aMonocots-10aMonocotyledones-10aPlantae-; [75314-] Diptera-10aPlants-10aSpermatophyta-10aSpermatophytes-10aVascular-Plants; Diptera-: Animals-1 aToft, Richard, J.1 aHarris, Richard, J.1 aWilliams, Peter, A.  uhttp://www.online-keys.net/sciaroidea/add01/Toft_et_al_2001.pdf