揭开大规模灭绝的秘密——生态、演化和生物多样性的变化

研究环境变动时,生态系统中的生物群体如何反应?如果整个物种灭绝,剩下的物种会移动到空缺区域来占据,还是新物种会填补空白?康涅狄格大学地球科学系的博士生Sarah Brisson将探索这些问题。她的研究成果已发表在《英国皇家学会报B类:生物学》上。

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Brisson研究了发生在约3.7亿年前的晚泥盆纪的一次大规模灭绝事件,旨在了解生态系统和其中的生物群体的反应。在这项研究中,Brisson通过研究从纽约和宾夕法尼亚州阿巴拉契亚盆地收集的化石,关注了一种名为腕足动物的小型贝壳形海洋生物。

Brisson表示,“大规模灭绝事件”的名称吸引了人们的注意力。当环境发生重大变化时,这些变化如何影响生物是理解当前环境和环境变化的相关因素。

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在晚泥盆纪,阿巴拉契亚盆地是一个形成于增长山脉后的浅海。 Brisson说,海底可能被腕足动物覆盖,这些生物在样本集中很常见。在水中,鱼也变得更加丰富,而在陆地上,大量植被出现,是地球历史上首次进行的新植物演化。

Brisson在研究这些生态系动态时,将地球视为一个系统,将生物的演化过程作为整体结构的一个方面。

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Brisson解释说,“生态位空间是生物生存的环境,在这种情况下,是基质扰动的水平和在深度梯度中生物最舒适的位置。”

要考虑的两个概念是生态位保守和生态位演化。 Brisson解释说,对于生态位保守,生物保持原地,保留其特征,而对于生态位演化,生物在某些方面改变和演化,以更喜欢新的环境参数。

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Brisson说,“在生物学中,有很多关于生态位动态的讨论,以及我们是否看到生态位演化或生态位保守,而在深时间内研究这些的研究人员并不多。”

通过艰苦地鉴定约20,000个腕足动物化石并分析它们在深度梯度上的喜好,B

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Exploring the Exterior Wall Systems Market Factors Shaping the Revenue Growth Rate of the market at a CAGR of 5.9% from 2023 – 2030

作者 宋·刘

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