Ephedra rhytidosperma的分布和保存方法
Chao Tan1, David Kay Ferguson2, Yong Yang1
1Co-Innovation Center for Sustainable Forestry in Southern China, State Key Laboratory of Tree Genetics and Breeding, College of Life Sciences Nanjing Forestry University Nanjing China.
Ecology and evolution
|January 2, 2025
概括
危物种Ephedra rhytidosperma的保护工作不足,只有15.1%的息地在自然保护区内. 迫切需要一种综合的方法,将现场和现场保护结合起来,以保护这一危植物物种.
科学领域:
- 保护生物学 保护生物学
- 生态生态学 生态生态学
- 植物学 植物学
背景情况:
- 全球变暖和人类活动威胁着生物多样性,全球约有28%的物种面临灭绝.
- 埃菲德拉 (Ephedra rhytidosperma) 是中国黑兰山脉本土的危植物,是国家关键保护的野生植物.
- 现有的危物种保护措施可能不足,需要重新评估它们的有效性.
研究的目的:
- 为了调查Ephedra rhytidosperma的保存状况和有效性.
- 预测物种在过去,现在和未来的气候场景下潜在的地理分布.
- 确定影响物种分布和适应的关键环境因素.
主要方法:
- 利用MaxEnt模型与发生数据和环境变量来预测地理分布.
- 分析了过去,现在和未来的气候场景,以了解范围的变化.
- 评估了该物种在现有自然保护区内的分布比例.
主要成果:
- 这种物种的范围已经显著缩小,自从最后的间冰期以来,它们向西迁移.
- 未来的预测表明波动范围与向东的迁移趋势.
- 降水量 (Bio14),温度 (Bio9) 和斜率是决定物种分布的关键因素.
- 只有15.1%的Ephedra rhytidosperma热点位于自然保护区内,突出显示了重要的保护差距.
- 不同高度的种群表现出不同的环境适应性.
结论:
- 目前的现场保护工作不足以保护Ephedra rhytidosperma,存在相当大的保护差距.
- 现场保护得到了有限的关注,进一步加剧了保护挑战.
- 综合保护战略,结合现场和现场管理,对于物种的生存至关重要.
- 这项研究为制定针对Ephedra rhytidosperma的有针对性的保护计划提供了必要的数据.
相关概念视频
01:28Adrenergic Agonists: Mixed-Action Agents
661
Mixed-action adrenergic agonists, like ephedrine and pseudoephedrine, directly and indirectly affect adrenergic receptors. These agents stimulate adrenoceptors and indirectly release stored neurotransmitters, amplifying the adrenergic response.
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...
Ephedrine and pseudoephedrine lack a catecholamine group, making them less susceptible to degradation by metabolic enzymes. They have increased oral bioavailability and lipophilicity, resulting in a longer duration of action. Their response is reduced by...
661
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
02:40Epiphytes, 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
01:57Adaptations that Reduce Water Loss
25.1K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.1K
01:24Biodiversity and Human Values
13.0K
Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.
13.0K
01:21Drug Distribution: Tissue Binding
2.5K
Upon entering the systemic circulation, drugs can distribute into the interstitial and intracellular fluid of various tissue cells. This distribution is facilitated by the binding of drugs to different cellular components within tissues, which may lead to drug accumulation in specific areas. Drugs bound to tissue components serve as reservoirs that release free drugs back into the system, prolonging the drug's overall action. However, this accumulation can also result in local toxicity.
For...
For...
2.5K