A half-century analysis of landscape dynamics in southern Quebec, Canada

被引：16

作者：

Jobin, Benoit ^{[1
]}

Latendresse, Claudie ^{[1
]}

Baril, Alain ^{[2
]}

Maisonneuve, Charles ^{[3
]}

Boutin, Celine ^{[2
]}

Cote, Dominique ^{[1
]}

机构：

[1] Environm Canada, Canadian Wildlife Serv, Quebec City, PQ G1J 0C3, Canada

[2] Carleton Univ, Environm Canada, Natl Wildlife Res Ctr, Ottawa, ON K1A 0H3, Canada

[3] Minist Ressources Nat, Direct Expertise Faune Forets Terr Bas St Laurent, Rimouski, PQ G5L 8B3, Canada

来源：

ENVIRONMENTAL MONITORING AND ASSESSMENT | 2014年 / 186卷 / 04期

关键词：

Agriculture intensification; Fragmentation; Land cover; Landscape dynamic; Quebec; FARMLAND BIRDS; LAND-COVER; AGRICULTURAL INTENSIFICATION; RIPARIAN HABITATS; FRAGMENTATION; CONSERVATION; CONSEQUENCES; ABANDONMENT; DIVERSITY; SATELLITE;

D O I：

10.1007/s10661-013-3531-6

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We studied landscape dynamics for three time periods (< 1950, 1965, and 1997) along a gradient of agricultural intensity from highly intensive agriculture to forested areas in southern Qu,bec. Air photos were analyzed to obtain long-term information on land cover (crop and habitat types) and linear habitats (hedgerows and riparian habitats) and landscape metrics were calculated to quantify changes in habitat configuration. Anthropogenic areas increased in all types of landscapes but mostly occurred in the highly disturbed cash crop dominated landscape. Perennial crops (pasture and hayfields) were largely converted into annual crops (corn and soybean) between 1965 and 1997. The coalescence of annual crop fields resulted in a more homogeneous agricultural landscape. Old fields and forest cover was consistently low and forest fragmentation remained stable through time in the intensive agriculture landscapes. However, forest cover increased and forest fragmentation receded in the forest-dominated landscapes following farm abandonment and the transition of old fields into forests. Tree-dominated hedgerows and riparian habitats increased in areas with intensive agriculture. Observed changes in land cover classes are related to proximate factors, such as surficial deposits and topography. Agriculture intensification occurred in areas highly suitable for agriculture whereas farm abandonment was observed in poor-quality agriculture terrains. Large-scale conversion of perennial crops into annual crops along with continued urbanization exerts strong pressures on residual natural habitats and their inhabiting wildlife. The afforestation process occurring in the more forested landscapes along with the addition of tree-dominated hedgerows and riparian habitats in the agriculture-dominated landscapes should improve landscape ecological value.

引用

页码：2215 / 2229

页数：15

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