超级动物的移动性:评估来自澳大利亚昆士兰州中东部的一个已灭绝的巨动物的食范围
Christopher Laurikainen Gaete1, Anthony Dosseto1, Lee Arnold2
1Wollongong Isotope Geochronology Laboratory, School of Earth, Atmospheric and Life Sciences, University of Wollongong, Wollongong, New South Wales, Australia.
PloS one
|April 23, 2025
概括
已灭绝的袋鼠巨型草食动物的家园范围比预期的要小,这表明环境质量,而不是身体质量,影响了它们的食. 稳定的热带雨林可能使它们易于因气候变化而灭绝.
科学领域:
- 古生物学的古生物学
- 生态生态学 生态生态学
- 进化生物学 进化生物学
背景情况:
- 了解灭绝的大型动物生态需要了解它们的地理范围.
- 在现存的食草动物中,人体质量会影响地理范围,但在有袋动物中,尤其是已灭绝的巨型动物中,人们对这种关系的理解较少.
- 在胎盘哺乳动物中建立了全尺度缩放关系,但对于有袋动物来说定义不清楚.
研究的目的:
- 为了估计已灭绝的有袋动物属Protemnodon的家园范围.
- 为了研究影响已灭绝的有袋动物大草食者的地理范围的因素.
- 了解纪巨型动物的灭绝动态.
主要方法:
- 用现存的巨动物进行的基因组概括最小平方回归模型.
- 在化石Protemnodon和地质样本中分析87Sr/86Sr同位素比率.
- -和TT-OSL约会以确定时间表.
主要成果:
- 回归模型预测Protemnodon的平均家庭范围为11.6 ± 5.8平方公里.
- 化石Protemnodon 87Sr/86Sr值表明它们在化石化地点附近寻找食物,这表明它们的家园范围更小.
- 大型动物的家园范围与环境质量比人体质量更强烈相关.
结论:
- 在稳定的热带雨林环境中的小家庭范围可能使得Protemnodon易受气候驱动的灭绝.
- 雨林适应的动植物在埃特纳山上持续到至少280万年.
- 区域特定的生物数据对于了解世动物灭绝途径至关重要.
相关概念视频
The Fossil Record
24.7K
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
24.7K
What is Evolutionary History?
35.9K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
35.9K
Ecological Niches
23.4K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
23.4K
Habitat Fragmentation
17.3K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
17.3K
Predator-Prey Interactions
15.9K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
15.9K
Conservation of Declining Populations
9.5K
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
9.5K


