JeanBouchard1991

Référence

Jean, M., Bouchard, A. (1991) Temporal changes in wetland landscapes of a section of the St. Lawrence River, Canada. Environmental Management, 15(2):241-250.

Résumé

Historical aerial photographs (from 1946 through 1983) were used to study and describe the nature and extent of changes in wetland vegetation of a section of the St. Lawrence River and to evaluate the relative importance of water level, fire, and vegetational development as causal factors of these historical changes. Data were encoded and analyzed using a geographical information system, autocorrelation, and Mantel tests. Results show three temporal patterns in wetland dynamics. First, some wetland zones have been reduced by human activities (urbanization, landfilling, canal dredging). The second group consists of wetland areas that remain stable and do not change over time. They are generally protected sites artificially maintained by water-level control. A third situation has occurred in the Lake Saint-Francois National Wildlife Area, where no significant wetland losses were detected, but where landscape structure has changed greatly. Modeling with Mantel tests suggests that, in the latter case, these changes in wetland landscape are related to the suppression of burning (fires set deliberately by Indians) since the purchase of the territory by the Canadian federal government. This situation has caused rapid replacement of wet meadows by Alnus rugosa scrub and a possible decline in habitat diversity.

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@ARTICLE { JeanBouchard1991,
    AUTHOR = { Jean, M. and Bouchard, A. },
    TITLE = { Temporal changes in wetland landscapes of a section of the St. Lawrence River, Canada },
    JOURNAL = { Environmental Management },
    YEAR = { 1991 },
    VOLUME = { 15 },
    PAGES = { 241-250 },
    NUMBER = { 2 },
    NOTE = { 0364152X (ISSN) Cited By (since 1996): 20 Export Date: 26 April 2007 Source: Scopus CODEN: EMNGD Language of Original Document: English },
    ABSTRACT = { Historical aerial photographs (from 1946 through 1983) were used to study and describe the nature and extent of changes in wetland vegetation of a section of the St. Lawrence River and to evaluate the relative importance of water level, fire, and vegetational development as causal factors of these historical changes. Data were encoded and analyzed using a geographical information system, autocorrelation, and Mantel tests. Results show three temporal patterns in wetland dynamics. First, some wetland zones have been reduced by human activities (urbanization, landfilling, canal dredging). The second group consists of wetland areas that remain stable and do not change over time. They are generally protected sites artificially maintained by water-level control. A third situation has occurred in the Lake Saint-Francois National Wildlife Area, where no significant wetland losses were detected, but where landscape structure has changed greatly. Modeling with Mantel tests suggests that, in the latter case, these changes in wetland landscape are related to the suppression of burning (fires set deliberately by Indians) since the purchase of the territory by the Canadian federal government. This situation has caused rapid replacement of wet meadows by Alnus rugosa scrub and a possible decline in habitat diversity. },
    KEYWORDS = { landscaping river human activity wetland Canada, Quebec, St Lawrence River Alnus rugosa },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.04 },
}

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