相关实验视频
Updated: May 22, 2025

03:41
Employing Aeroponic Systems for the Clonal Propagation of Cannabis
Published on: December 1, 2021
3.6K
大麻sativa的物种分布:过去,现在和未来
Anna Halpin-McCormick1, Tai McClellan Maaz1, Michael B Kantar1
1Department of Tropical Plant and Soil Sciences, University of Hawaii at Manoa, Honolulu, Hawaii, United States of America.
PloS one
|March 13, 2025
概括
由于气候变化,大麻sativa L. 的分布正在转变. 未来的预测表明,大量的息地丧失,影响了这种多功能植物的种植和保护工作.
科学领域:
- 生态生态学 生态生态学
- 植物学 植物学
- 气候科学 气候科学
背景情况:
- 大麻三L.,欧亚原产的一年草,有着悠久的人类关联和多种用途 (食品,纤维,药物) 的历史.
- 它目前的分布受历史养,人类活动和不断变化的环境条件,包括气候波动的影响.
研究的目的:
- 通过古气候场景调查Cannabis sativa L.分布的过去变化.
- 在各种气候变化场景下,模拟和预测Cannabis sativa L.分布的未来变化.
主要方法:
- 使用物种分布建模,整合古气候数据和当今环境变量 (温度,降水,土壤特性).
- 影响分布的关键变量包括土壤有机碳含量 (ORCDRC),pH (PHIHOX),年平均温度 (BIO-1),最冷季度平均温度 (BIO-11) 和土壤有机碳密度 (OCDENS).
- 评估了未来气候预测 (RCP45/SSP245和RCP85/SSP585) 以评估息地适宜性变化.
主要成果:
- 古气候模型显示,C. sativa在欧亚大陆的利基扩张和收缩.
- 当前的建模在结合土壤和气候变量时显示出高预测准确度 (AUC = 0.934).
- 未来的气候场景预测,到2050年,全球适合息地损失约为43%,到2070年损失将持续但较慢.
结论:
- 预计气候变化将大大改变大麻sativaL.的全球分布.
- 这些变化对野生亲属的保护和户外大麻种植实践的可持续性产生了重大影响.
- 了解这些环境驱动因素对于未来的农业和保护战略至关重要.
相关概念视频
Distribution and Dispersion
21.5K
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...
21.5K
Introduction to Plant Diversity
43.5K
From Water to Land
43.5K
Formation of Species
38.8K
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.
38.8K
Probability Distributions
6.7K
The probability of a random variable x is the likelihood of its occurrence. A probability distribution represents the probabilities of a random variable using a formula, graph, or table. There are two types of probability distribution– discrete probability distribution and continuous probability distribution.
A discrete probability distribution is a probability distribution of discrete random variables. It can be categorized into binomial probability distribution and Poisson...
A discrete probability distribution is a probability distribution of discrete random variables. It can be categorized into binomial probability distribution and Poisson...
6.7K
Global Climate Change
24.0K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.0K
Evolutionary Relationships through Genome Comparisons
5.7K
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
5.7K

