在巴西高海拔地区的高频率的两性恋
Amanda Pacheco1, Pedro Joaquim Bergamo1,2, Leandro Freitas1
1Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro 22460-030, Brazil.
Annals of botany
|October 17, 2024
概括
在巴西的一个社区中,使用动物和风的授粉策略 - - 两胞性 - - 在11%的物种中被发现. 这显著增加了已知的两植物物种的数量,揭示了在意想不到的地方的风传粉.
科学领域:
- 生态生态学 生态生态学
- 植物学 植物学
- 进化生物学 进化生物学
背景情况:
- 植物利用生物 (动物) 和非生物 (风) 授粉的两种授粉方式,这是一种罕见的授粉策略,研究有限.
- 之前关于两性恋的研究主要集中在风传粉属中的几种物种上,忽视了它在社区层面的流行.
研究的目的:
- 为了确定一个植物群体内双胞胎的频率.
- 研究风和动物授粉对潜在的双胞胎种类的种子生产的贡献.
主要方法:
- 评估了来自巴西高海拔萨凡纳 (campos de altitude) 的63种动物授粉物种的风传粉.
- 进行了受控的授粉实验,以量化风和动物对具有风传播花粉的物种种子集的贡献.
- 对表现出风传粉的物种分析了花特征和花访客组合.
主要成果:
- 在37%的被评估物种中,检测到由风传播的花粉.
- 七种物种 (11%) 证明了动物和风对其繁殖的贡献,其中一种物种被蜂鸟,大蜜蜂和风授粉.
- 这些双胞胎物种通常具有不受限制的花形态和通用化授粉策略.
结论:
- 两性在这个群体中发生的频率比以前报告的更高 (11%),为已知的两性物种增加了大约5%.
- 将风花粉分析与受控授粉实验相结合,成功地确定了在风花粉研究中经常被忽视的双胞胎物种.
- 这些发现表明,双胞胎性不仅仅局限于风传粉的血统,而且有利于这种策略的选择性压力也在动物传粉物种中发挥作用.
更多相关视频
相关概念视频
What is Climate?
18.4K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
18.4K
Epiphytes, Parasites, and Carnivores
12.9K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
12.9K
Frequency-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
Habitat Fragmentation
17.4K
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.
17.4K
Gene Flow
34.9K
Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.
34.9K
Thermosensation
30.3K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
30.3K


