Plant diversity in three types of hedgerows adjacent to cropfields

被引:58
作者
Boutin, C
Jobin, B
Bélanger, L
Choinière, L
机构
[1] Environm Canada, Canadian Wildlife Serv, Natl Wildlife Res Ctr, Hull, PQ K1A 0H3, Canada
[2] Environm Canada, Canadian Wildlife Serv, St Foy, PQ G1V 4H5, Canada
[3] Bur Ecol Appl Inc, Levis, PQ G6V 4Z6, Canada
关键词
eastern Canada; farmland; field margin; natural woody hedgerow; plant diversity; planted hedgerow; plant species richness; windbreak;
D O I
10.1023/A:1014023326658
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
The farming landscape of eastern Canada is dotted with three main types of hedgerows: (1) natural woody, (2) planted woody and (3) herbaceous. The objective of this study was to compare the value of these habitats as a repository of plant biodiversity in agricultural areas of southern Quebec. The overall plant diversity was higher in natural hedgerows and they contained more plant species of conservation values than other hedgerow types. Plant species richness per quadrat was, however, higher in planted woody hedgerows, and together with the species composition, lead to the conclusion that planted hedgerows in their entirety consisted of an ecotone type of vegetation such as is found in field edges which usually support high plant diversity and productivity but where transient plant species predominate. Consequently, this study indicated that natural hedgerows fare better than planted hedgerows in terms of diversity of plants of conservation interest. In spite of that, planted woody hedgerows contained plant (and bird) species of some interest and should be favoured over more desolate herbaceous hedgerows. In areas where hedgerows were removed and are not re-establishing naturally, a mixture of deciduous trees and conifers should be encouraged in further windbreak planting programs so as to conciliate both the conservation and agronomic objectives. Furthermore, management practices should optimise the growth of establishing plants of conservation values.
引用
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页码:1 / 25
页数:25
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