辽宁蛇岛老铁山保护区迎今秋“万猛日”|久久久久久AV无码免费网站动漫
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中新网大连10月4日电 (记者 杨毅)近日,在位于大连旅顺的蛇岛老铁山国家级自然保护区的天空上演了一场震撼的猛禽“迁徙盛典”,期待已久的“万猛日”如约而至。

辽宁省唯一兼具世界自然遗产和世界生物圈保护区两大联合国教科文组织顶级生态品牌保护地,辽宁大连蛇岛—老铁山保护区为迁徙猛禽提供了足量的食物和渤海海峡最短飞越路线,是全球久负盛名的猛禽迁徙中转聚集地,被誉为“鸟栈”,每年秋季有数十万只猛禽经此迁徙,跨越渤海海峡,或沿渤海海岸线南迁。
10月2日,清晨5点30分,监测员们准时到达了监测平台。不久,远处的山坡上开始出现黑鸢的身影,28只、45只、189只......越来越多的黑鸢汇聚,形成了一条长长的“鸢河”,截至7点,黑鸢的数量累积到460只。正当志愿者们干劲十足的计数时,乌云与雷声在天际交织,雨滴也随着密云时而滴落,这样的天气往往不利于猛禽过海。

就在监测员们以为惊喜就这样结束了,雨停了,北风忽起。随后凤头蜂鹰的剪影刺破云层,大量“黑点”从山头涌出。监测员们高呼:“是凤头蜂鹰大部队!它们终于来了!”这条“鹰河”宽度逾1公里,高度300—500米,由500只凤头蜂鹰组成。此后凤头蜂鹰、黑鸢、灰脸鵟鹰、苍鹰、雀鹰、日本松雀鹰混群像洪水泄闸一般涌出,它们形成一个个鹰柱,如超大龙卷风一般在监测平台上空盘旋,当它们上升到一定高度后,又变换队形纷纷跨海。监测员们直呼过瘾,现场计数器声更是连成一片。

直至下午2点,猛禽监测数量达10495只,万猛日终于到来。盛况持续到下午3点半左右,气温逐渐降低,猛禽的高度也开始大幅度的降低,但是远处仍有猛禽陆续赶来。直到下午5点,监测员们在夕阳的余晖中依依不舍地下山。
经统计,当日监测猛禽总数最终定格在12077只,创下老铁山今年猛禽迁徙的数据新高。
“今年‘万猛日’迟到一周,是因为气温偏高,猛禽迁徙的‘脚步’也就慢了些。”保护区科研人员在分析数据时说道,“但这迟到的约定,恰恰说明猛禽对环境变化的敏感与适应,也体现了我们保护区作为‘重要候鸟驿站’的生态韧性。”(完)
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