The impacts for stone curlews of increased traffic on the A11. Model and predictions.

Clarke, R. T., Sharp, J. and Liley, D., 2009. The impacts for stone curlews of increased traffic on the A11. Model and predictions. Technical Report. Footprint Ecology. (Unpublished)

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Abstract

Stone curlew nest density in the Breckland region of Eastern England was shown to be negatively related to ‘nearby’ housing density and ‘nearby’ trunk road traffic (based on new traffic data for the period 1988-2006). However, no statistically significant additional relationship with non-trunk A-road traffic could be detected. We recommend using the statistical modelling predictions in the report Table 5 as the best currently available estimates of the potential effect of a 70% increase in A11 average daily (March-August)two-way traffic above the average All traffic levels in 2002-06. The predicted effect of a 70% increase in A11 traffic is for a reduction from current observed nest numbers on suitable arable land of 3.7% with no changes in housing density or 4.9% when combined with the predicted effect of housing options. A reduction of 7.3% is predicted for semi-natural grassland and SSSI habitats. Taking both semi-natural grassland/SSSI and arable habitats together, the observed total average nest numbers for the period 2002-2006 was 221.4, and the prediction following a 70% increase in traffic on the A11 is 210.8, a reduction of 10.6 nests (4.8%).

Item Type:Monograph (Technical Report)
Subjects:Geography and Environmental Studies
Group:School of Applied Sciences
ID Code:20536
Deposited By:Professor Ralph Clarke
Deposited On:28 Nov 2012 14:19
Last Modified:28 Nov 2012 14:19

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