Mammalian responses to Middle Holocene climatic change in the Great Basin of the western United States
Mammalian responses to Middle Holocene climatic change in the Great Basin of the western United States
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DOI：
10.1046/j.1365-2699.2000.00383.x
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发表时间：
2000-01-01
影响因子：
3.9
通讯作者：
Grayson, DK
中科院分区：
文献类型：
--
作者：
Grayson, DK
尽管在过去的10，000年里，人们对大盆地（美国西部）的气候和生态进行了数十年的深入研究，但哺乳动物对中全新世极端干旱的反应（c。距今8000-5000年），对这一地区的生物学研究知之甚少。使用一个很好的日期从宅基地洞，中北部犹他州的小哺乳动物序列，我表明，中全新世小哺乳动物区系的这一地区经历了物种丰富度和均匀度的下降，主要是由一系列的本地aprotations和近aprotations加上一个显着增加的丰富的类群很好地适应干旱条件。在这一时期结束时，一些需要相对中型栖息地的类群开始迅速增加，其他类群直到几千年后才恢复，而其他类群则根本没有恢复。这一系列的反应很难被发现，因为中全新世开始时的气候变化比接近其结束时发生的变化要大得多。
In spite of decades of intense research directed toward understanding the climates and ecology of the Great Basin (western United States) during the past 10,000 years, the responses of mammals to the extreme aridity of the Middle Holocene (c. 8000-5000 years ago) in this region have been poorly understood. Using a well-dated small mammal sequence from Homestead Cave, north-central Utah, I show that the Middle Holocene small mammal faunas of this area underwent a decrease in species richness and evenness, driven largely by a series of local extinctions and near-extinctions coupled with a dramatic increase in the abundance of taxa well-adapted to xeric conditions. At the end of this period, some taxa that require relatively mesic habitats began to increase in abundance immediately, others did not rebound in abundance until several thousand years later, while still others have not returned at all. This suite of responses has been difficult to detect because climatic change at the beginning of the Middle Holocene was so much more substantial than that which occurred toward its end.