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首页> 外文期刊>Landscape Ecology >Analysis of landscape pattern change trajectories within areas of intensive agricultural use: case study in a watershed of southern Qucbbec, Canada
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Analysis of landscape pattern change trajectories within areas of intensive agricultural use: case study in a watershed of southern Qucbbec, Canada

机译：集约化农业利用区域内景观格局变化轨迹的分析：以加拿大魁北克南部流域为例

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This study aimed at capturing the spatial variability of landscape patterns and their trajectories of change from 1950 to 2000 within a watershed, which is representative of areas of intensive agricultural use. After an analysis of landscape features changes for the entire watershed based on aerial photographs, hierarchical clustering analysis provided a typology of landscape patterns for the cadastral lots. Following that, the trajectory of change of each lot was characterized (nature, importance, direction, rate of change). Seven types of landscape patterns are distinguished by the relative importance of different classes of landscape features and 51 trajectories of change were identified for the lots. The analysis shows that although the majority of lots were subjected to a homogenization of their landscape patterns since 1950, this trend is not entirely uniform and that since 2000 it occurs alongside trends towards diversification of certain landscape features on some lots. Furthermore, nearly a third of the lots are not following the main trajectories of change detected. Thus, the results suggest that extrinsic forces (policies, technologies) that are directing main changes in areas of intensive agricultural use toward uniformity could be modulated by internal forces (uses and values of the population). A better understanding of theses internal forces seems crucial to manage landscapes. From a methodology standpoint, although the hierarchical clustering analyses appear useful for understanding the spatial and temporal variability of landscape patterns, particular attention must be given to validating the typology chosen to characterize them.
机译：这项研究旨在捕获流域内1950年至2000年景观格局及其变化轨迹的空间变异性，该流域代表了农业集约利用的地区。在基于航拍照片分析了整个流域的景观特征变化之后，分层聚类分析提供了地籍地块景观格局的类型学。然后，对每个批次的变化轨迹进行了表征（性质，重要性，方向，变化率）。不同类别的景观特征的相对重要性区分了七种景观格局，并为该地块确定了51条变化轨迹。分析表明，尽管自1950年以来大多数地段的景观格局均一化，但这种趋势并不完全统一，并且自2000年以来，这种趋势与某些地段某些景观特征多样化的趋势同时发生。此外，近三分之一的批次未遵循检测到的主要变化轨迹。因此，结果表明，将内在力量（人口的使用和价值）调节外在力量（政策，技术），将外来力量（政策，技术）引导到集约化农业利用领域的主要变化向统一性发展。更好地理解这些内部力量似乎对管理景观至关重要。从方法学的角度来看，尽管分层聚类分析对于理解景观格局的时空变异性似乎很有用，但必须特别注意验证选择用于表征其特征的类型学。

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