Effect of cereal harvesting method on a recent population decline of Corn BuntingsEmberiza calandraon the Western Isles of Scotland

Autor:	Jamie Boyle, Jeremy D. Wilson, Nicholas I. Wilkinson, Brian Lowe, Digger B. Jackson
Rok vydání:	2007
Předmět:	education.field_of_study biology Population Machair biology.organism_classification Western Isles Population decline Geography Agronomy Fodder soccer.team soccer Corn bunting Arable land education Ecology Evolution Behavior and Systematics Emberiza Nature and Landscape Conservation
Zdroj:	Bird Study. 54:362-370
ISSN:	1944-6705 0006-3657
DOI:	10.1080/00063650709461496
Popis:	Capsule Population decline since 1995 is associated with the harvesting of cereals as arable silage. Aim To survey Corn Bunting populations on the Western Isles and test whether population changes since 1995 are associated with change in cereal harvesting methods. Methods Twelve areas of machair on the Uists and Benbecula were re-surveyed in 2002, after previous surveys in 1983 and 1995. These and other areas of suitable habitat on these islands, plus Berneray, Baleshare, Vallay, Barra and Vatersay, were surveyed in 2003–05 to provide a breeding population estimate for the Western Isles. Cereal strips in the 12 core survey areas were mapped in 2002 and the timing and method of harvesting of each was recorded. Cattle-feeding stands in 24 crofting townships were visited in March 2003 to record the type of fodder available, measure grain abundance and ripeness in fodder samples, and record foraging Corn Buntings. Experimental trials tested whether Corn Buntings selected fodder with riper grain. Results The W...
Databáze:	OpenAIRE
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