相关实验视频
Updated: Jun 12, 2025

12:44
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
8.0K
新的保护区的能力,以抵消降级,缩小规模,和degazettement损失
Yanyun Yan1, Song Ling Tan1, Edward L Webb2,3
1Department of Biological Sciences, National University of Singapore, Singapore.
Conservation biology : the journal of the Society for Conservation Biology
|September 25, 2024
概括
保护区的降级,缩小和排放 (PADDD) 往往无法恢复生物多样性. 新的保护区 (PA) 和PADDD补偿很少弥补损失,突出了改善保护战略的迫切需要.
科学领域:
- 保护科学 保护科学
- 生物多样性管理的管理
- 环境政策 环境政策
背景情况:
- 保护区的降级,缩小和撤销 (PADDD) 是一个全球趋势,可能会破坏生物多样性保护.
- 新的保护区 (PA) 和PADDD补偿是恢复通过PADDD失去的生态代表性的潜在机制.
研究的目的:
- 评估PADDD补偿和新的PA在恢复受影响保护区网络内的生物多样性特征方面的有效性.
- 评估PADDD补偿和新的PA在多大程度上弥补了保护区覆盖面,关键生物多样性区域 (KBA),生态区域和危物种范围的损失.
主要方法:
- 在2011年至2020年期间,对16个陆地和4个海洋地区进行了PADDD的分析.
- 在PADDD事件和随后的保护行动之前和之后,对面积覆盖面,KBA代表性,生态区域以及临的两动物,哺乳动物,鸟类和爬行动物物种的定量评估.
主要成果:
- PADDD的补偿很少发生 (19%陆地,25%海洋),很少获得完全的补偿.
- 补偿和新的PA部分恢复了面积 (63%) 和KBA (57%) 的代表性,但在生态区域 (38%) 和危物种 (20-33%) 中不足.
- 由于PADDD造成的生物多样性损失的补偿存在重大缺陷,即使包括不相关的PA.
结论:
- 目前的PADDD抵消策略在很大程度上不足以恢复生物多样性代表性.
- 迫切需要扩大PADDD抵消和新的PAA,以实现保护目标,包括全球生物多样性框架的30x30目标.
- 未来的保护计划必须优先考虑恢复生物多样性和受PADDD影响的保护区网络的完整性.
相关概念视频
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
Conservation of Declining Populations
9.6K
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
9.6K
What is Conservation Biology?
18.4K
Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
18.4K
Conservation of Small Populations
13.1K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
13.1K
Design Example: Analyzing Capacity Contours for Flood Risk Assessment
41
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
41
Threats to Biodiversity
22.2K
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...
22.2K

