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首页> 外文期刊>Biology Bulletin >Changes in the Population of Forest and Dendrophilous Birds of the Clay Semidesert in the Volga-Ural Interfluve over Sixty Years
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Changes in the Population of Forest and Dendrophilous Birds of the Clay Semidesert in the Volga-Ural Interfluve over Sixty Years

机译：六十年代伏尔加-乌鲁沟地区粘土半沙漠化森林和树状鸟类的种群变化

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摘要

The modern situation of the vertebrate population in the clay semidesert of the interfluve of the Volga and Ural rivers differs significantly from that observed 50-60 years ago. This is due to the fact that reduction of ravine forests and steppe shrubs (which began in the 18th century) has extremely affected the forest and dendrophilous animals. The artificial afforestation, especially intense since the middle of the 20th century, provided surrogate "forest" sites in the region by the end of the 1970s. This helped to restore the missing species and raise the abundance and dispersal of forest and dendrophilous animals. By the beginning of the 21st century, afforestation had stopped in the region and the plantation areas had begun to shrink. Some trends in the populations of mammals and birds can be already noticed.
机译：伏尔加河和乌拉尔河交汇处的粘土半沙漠中的脊椎动物种群的现代状况与50到60年前观察到的情况大不相同。这是由于这样的事实，即沟壑森林和草原灌木丛的减少（始于18世纪）极大地影响了森林和树突动物。自20世纪中叶以来特别强烈的人工造林，到1970年代末在该地区提供了替代性的“森林”遗址。这有助于恢复丢失的物种，并提高森林和树突动物的丰度和扩散。到21世纪初，该地区的植树造林已经停止，种植面积开始缩小。哺乳动物和鸟类种群的一些趋势已经被注意到。

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