Tim Conyers - Academia.edu (original) (raw)
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Papers by Tim Conyers
Biological Conservation, 1986
A BSTRA CT Hedgerow and ditch removal between 1838 and 1984 in an agricultural area of south east... more A BSTRA CT Hedgerow and ditch removal between 1838 and 1984 in an agricultural area of south east Essex was studied using maps, aerial photographs and field survey results as source materials. An opisometer was used to record hedgerow and ditch lengths (metres) at seven reference points over the 146year period. Removal was found to have occurred in two main periods, 1838-73 (35 kin) and 1960-84 (49 km). The rate of removal for the latter period showed no signs of decline. Removal of hedgerows and ditches on farms has occurred piecemeal, with larger farms undergoing greater changes. Smaller farms (< 70 ha) in the western region (an area composed solely of hedgerow field boundaries) of the study area still have relatively high hedgerow densities (average 136 m hat). As 3.8 km of hedgerow removed between 1980 and 1984 was due to farm enlargement in the western region, future losses are expected in this area upon further amalgamation of the smaller farms with adjacent larger concerns (> 150 ha). As the hedgerows on these small farms are important wildlife features, such a future trend has important implications for conservation on farms.
Biological Conservation, 1986
A BSTRA CT Hedgerow and ditch removal between 1838 and 1984 in an agricultural area of south east... more A BSTRA CT Hedgerow and ditch removal between 1838 and 1984 in an agricultural area of south east Essex was studied using maps, aerial photographs and field survey results as source materials. An opisometer was used to record hedgerow and ditch lengths (metres) at seven reference points over the 146year period. Removal was found to have occurred in two main periods, 1838-73 (35 kin) and 1960-84 (49 km). The rate of removal for the latter period showed no signs of decline. Removal of hedgerows and ditches on farms has occurred piecemeal, with larger farms undergoing greater changes. Smaller farms (< 70 ha) in the western region (an area composed solely of hedgerow field boundaries) of the study area still have relatively high hedgerow densities (average 136 m hat). As 3.8 km of hedgerow removed between 1980 and 1984 was due to farm enlargement in the western region, future losses are expected in this area upon further amalgamation of the smaller farms with adjacent larger concerns (> 150 ha). As the hedgerows on these small farms are important wildlife features, such a future trend has important implications for conservation on farms.