SPECIES RICHNESS AND ABUNDANCE OF BIRDS IN MT LOFTY RANGES GUM WOODLAND HABITAT: YEAR 2000 SURVEY

摘要: As a part of the on-going bird survey Mt Lofty Ranges South Australia we visited 61 sites in 46 patches gum woodland spring and summer year 2000. Each patch contained one or more 2-hectare that were for three 1-hour periods on different days. visit was divided into consecutive 20-minute sampling providing total nine samples each site 549 overall. This paper provides data public record with some basic analysis discussion. Three lists summarise categorise records by species, sample. Overall, 98 species recorded; this is 26 than concurrent stringybark habitat (Possingham, Field Possingham 2006). We calculate two measures abundance probability recording density. Comparing relative from surveys, 22 show preference seven stringybark. Basic statistical predicts there 90% average number recorded during single sample 2-ha 10.3–11.5. an estimate richness Ranges. These figures contrast 9.11–9.95 woodland. Aggregating all to form 3hour results 24.4–26.4 probability. The equivalent are 20.3– 22.5. differences between highly significant statistically diverse. used accumulation model presented Possingham, (2004) obtain better estimates region. Supporting previous paragraph, visits gave estimated confidence interval 79.6– 83.3, being significantly greater 58.7– 71.3 et al. (2006). More may be needed, however, explain 122 obtained analysing accuracy relationship its density has been improved inclusion flocking factor. factor separates groups. groups defined birds per four, less two. improvement illustrated root-mean-square error reducing 0.0072 compared 0.934 when not used. Statistical observer, wind had effect recorded. changes 16.5 6.0 over observers, 11.6 7.3 caused strong and, eight sites. report available authors.