相关实验视频

Updated: Jul 13, 2025

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea
07:19

Field Experiments of Pollination Ecology: The Case of Lycoris sanguinea var. sanguinea

Published on: November 25, 2016

11.5K

两个相似树种的开花时间变化有助于避免对授粉者服务的竞争

Larissa Alves-de-Lima1, Eduardo Soares Calixto2,3, Marcos Lima de Oliveira1,2

  • 1Instituto de Biologia, Universidade Federal de Uberlândia, Uberlândia 38400-902, MG, Brazil.

Plants (Basel, Switzerland)
|October 14, 2023
PubMed
概括

巴西的两种相关植物通过不同的开花时间避免受粉者竞争. 这种时间分区允许共存,尽管有相似的花朵和共享的授粉者,这表明了反竞争机制.

关键词:
蜜汁和花蜜是不同的.现象学 (phenology) 是一种现象学.对于花粉来说,这是一个很好的选择.授粉 授粉 授粉 授粉时间分区时间分区.

更多相关视频

In Vitro Rearing of Solitary Bees: A Tool for Assessing Larval Risk Factors08:50

In Vitro Rearing of Solitary Bees: A Tool for Assessing Larval Risk Factors

Published on: July 16, 2018

8.2K
Forced Flowering in Mandarin Trees under Phytotron Conditions08:42

Forced Flowering in Mandarin Trees under Phytotron Conditions

Published on: March 6, 2019

9.1K

相关概念视频

Pollination and Flower Structure02:40

Pollination and Flower Structure

Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.  
64.8K
Frequency-dependent Selection01:21

Frequency-dependent Selection

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.
22.0K
Formation of Species01:31

Formation of Species

Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
39.3K
Biological Clocks and Seasonal Responses02:45

Biological Clocks and Seasonal Responses

The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
34.7K
Competition02:34

Competition

When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
21.7K
Genetics of Speciation02:16

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
19.3K