From 1954 to 1990, the diversity index increases from 2.30 to 2.60, the dominance index decreases from 0.59 to 0.45, and the fragmentation index of high quality landscapes increases from 0.33 to 0.42. These changes mostly ascribe to urban land expanding and culture pond enlargement.

  • 从1954年到1990年,景观多样性从2.30上升到了2.60,优势度由0.59下降到0.45,高功能景观破碎度由0.33上升到0.42。

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