相关实验视频
Updated: Jun 3, 2025
07:57
Necropsy-based Wild Fish Health Assessment
Published on: September 11, 2018
17.1K
外来物种对河流生物评估的影响
Maria João Feio1, Janine P da Silva1, Robert M Hughes2
1University of Coimbra, FCTUC/DCV, MARE - Marine and Environmental Sciences Centre/ARNET - Aquatic Research Network, Coimbra, Portugal.
Journal of environmental management
|January 8, 2025
概括
外来物种对河流健康和本土生物多样性产生重大影响. 将外来种类纳入生物评估工具提高了对河流退化的敏感性,因此需要将它们纳入监测计划.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 保护生物学 保护生物学
背景情况:
- 外来种类的日益流行对河流生态系统的健康构成威胁,但它们的确切影响仍然不清楚.
- 当前的生物评估工具往往无法充分考虑外来物种,这可能会限制它们在检测河流退化的有效性.
研究的目的:
- 评估河流生物指标中外来种类的流行程度.
- 确定外来种类对本地物种丰富性和丰富性的影响.
- 评估将外来种类纳入生物评估工具是否会提高它们对环境压力因素的敏感性.
主要方法:
- 对17个国家外来物种流行率的分析,重点关注鱼类,巨植物,巨无脊椎动物和藻.
- 检查了8个数据库,以调查外来种类繁多和河流退化之间的联系.
- 生物评估指数的评估,包括和不包括外来物种.
主要成果:
- 鱼类和巨植物拥有最多的外来物种,但在生物指标上与本地物种有着不一致的区别.
- 外来种类的丰富程度显著影响本土社区的组成,并与各种河流压力因素有关.
- 生物评估指数显示,当外来物种的丰富性和丰富性被考虑时,对河流退化的敏感性增加.
结论:
- 外来物种对河流生态系统和本土生物多样性产生重大影响.
- 生物评估工具必须包含外来种群指标,以准确评估河流的健康状况.
- 未来的研究应该专注于较小的生物和物种级别的鉴定,以提高生物监测的有效性.
相关概念视频
02:26Ecological Disturbance
17.0K
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
17.0K
00:46Bioremediation
18.2K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.2K
01:39Keystone Species
21.5K
Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
21.5K
01:50Threats to Biodiversity
22.1K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.1K