气候和种子动态对分布边缘种子捕食者的繁殖表现的直接和间接影响
Daniel Oro1, Lídia Freixas2, Carme Bartrina2
1Ecology and Complexity Department Center of Advanced Studies (CEAB-CSIC) Blanes Spain.
Ecology and evolution
|August 19, 2024
概括
在它们的范围边缘,可食用的休眠鼠种群表现出不同的繁殖成功. 蒙特塞尼是个非常古老的城市.
科学领域:
- 生态生态学 生态生态学
- 动物学 动物学
- 保护生物学 保护生物学
背景情况:
- 边缘群体,通常密度较低,对环境变化非常脆弱.
- 可食用的鼠 (Glis glis),一个冬眠的动物和种子捕食者,居住在树叶森林中.
- 了解分布边缘的种群动态对于保护至关重要.
研究的目的:
- 分析在它们分布范围边缘的食用鼠种群的繁殖表现.
- 研究气候,种子可用性和息地特征对繁殖成功的影响.
- 在对比的息地探索人口对环境随机性的反应.
主要方法:
- 利用了两种不同的食用鼠种群 (Montseny和Montnegre) 的10年巢盒数据.
- 评估气候变化,树木覆盖的变化和种子的可用性 (树和).
- 分析了繁殖性能指标,包括占用,殖民,灭绝和 litter 尺寸.
主要成果:
- 蒙特塞尼种群显示,与种子可用性和异步种子生产相关的繁殖性能有所增加,排除了跳繁殖.
- 蒙特内格人口在恶劣的环境中表现出跳过育种作为一种适应策略,种子的可用性并不能推动业绩.
- 与蒙特内格雷相比,蒙特尼尼的占用率,殖民率和灭绝率都更高,灭绝率也更低.
结论:
- 在分布边缘的食用休眠鼠种群表现出对立的适应策略,以应对息地和气候变化.
- 种子的可用性及其可预测性显著影响边缘息地的繁殖成功和种群动态.
- 范围边缘的长期研究提供了对生物适应机制和保护需求的关键见解.
关键词:
野生花 (Fagus sylvatica) 是一种植物.眼睛 眼睛 眼睛 眼睛科尔库斯 (Quercus sppp) 是一种植物.粮食的可用性 粮食的可用性地方适应 地方适应当地的气象条件.边缘人口是边缘人口.生殖生殖的繁殖.种子生产种子生产种子生产.更多相关视频
相关概念视频
01:46Types of Selection
40.3K
Natural selection influences the frequencies of particular alleles and phenotypes within populations in several different ways. Primarily, natural selection can be directional, stabilizing, or disruptive. Directional selection favors one extreme trait and shifts the population towards that phenotype while selecting against individuals displaying alternate traits. Stabilizing selection favors an intermediate trait with a narrow range of variation. Deviation from the optimal phenotype towards an...
40.3K
02:39Predator-Prey Interactions
16.2K
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.
16.2K
00:54Distribution and Dispersion
21.6K
To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...
21.6K
01:32What is Natural Selection?
114.9K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
114.9K
01:21Frequency-dependent Selection
21.9K
When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
21.9K
00:51Energy Budgets
9.2K
Organisms must balance energy intake with the energy required for growth, maintenance and reproduction. These trade-offs result in a variety of survivorship and reproductive strategies, including semelparity and iteroparity. Semelparous species, like annual plants, have only one reproductive episode in their lifetimes and consequently have short lifespans. Iteroparous species, by contrast, have many reproductive events during their lifetimes but have relatively few offspring. These two...
9.2K