1 Australian Forestry 2 3 Diversity and abundance of Lepidoptera and Coleoptera in Greenfleet 4 reforestation plantings to offset carbon emissions: Proximity to remnants 5 will influence re-wilding of plantings 6 7 R. J. Forbesa, S. J. Watsona, E. O’Connorb, W. Wescottb and M. J. Steinbauera 8 9 aDepartment of Ecology, Environment and Evolution, La Trobe University, Melbourne, 10 Australia; bGreenfleet, 517 Flinders Lane, Melbourne, Australia 11 12 CONTACT Martin J. Steinbauer 13 email
[email protected] 14 Address Department of Ecology, Environment and Evolution, La Trobe University, 15 Melbourne, VIC 3086 1 16 ABSTRACT 17 Mixed-species (floristically diverse) plantings of trees and shrubs in former agricultural 18 landscapes to offset (sequester) carbon emissions are a recent component of Australian 19 landscapes. Although their potential to mitigate biodiversity loss is recognised, this ecological 20 function has not been investigated, in particular with respect to insect diversity. Over two 21 summers, we used light trapping to sample Lepidoptera (moths) and Coleoptera (beetles) in 22 Greenfleet plantings in two distinct locations in Victoria (plantings of four ages per location) 23 as well as in nearby remnant forest and in pasture. At both locations, we found that plantings 24 had a greater abundance of Lepidoptera than remnants but that the abundance in plantings was 25 comparable to the abundance in pasture. The species richness of Lepidoptera in plantings did 26 not differ significantly from that in remnants but was significantly greater than that in pasture. 27 The abundance and species richness of Coleoptera in plantings was lower than in remnant 28 forests but higher than in pasture.