Community structure of insect herbivores on different genotypes of silver birch (<em>Betula pendula</em>)

<p>2002_Data: Abundances of 23 individual insect species on 22 birch genotypes planted in 6 blocks in both Kuikanniitty and Parikkala study sites in 2002. Data also contain the columns for species richness and total mean abundance. Those four species that were not surveyed in Parikkala 2002 were excluded from Kuikanniitty species richness and total mean abundance calculations to better enable site comparisons. Columns containing species counts are named as in Table 1 in the associated article. Site: 1=Kuikanniitty, 2=Parikkala</p> <p>2003_Data: Abundances of 27 individual insect species on 22 birch genotypes planted in 6 blocks in both Kuikanniitty and Parikkala study sites in 2003. Data also contain the columns for species richness and total mean abundance. Columns containing species counts are named as in Table 1 in the associated article. Site: 1=Kuikanniitty, 2=Parikkala.</p> <p>2003_Additional_KuikanniittyData: Abundances of 27 individual insect species on 22 birch genotypes planted in 6 blocks in Kuikanniitty. Each block has two saplings from each genotype: one that was sprayed with pyrethrin in 2002 and one non-sprayed control. Data also contain the columns for species richness and total mean abundance. Columns containing species counts are named as in Table 1 in the associated article. Insecticide: 0=control, i.e. natural herbivory, 1=herbivores removed by pyrethrin sprayings in 2002. Site: 1=Kuikanniitty.</p>