在哥斯达黎加瓜纳卡斯特保护区 (Área de Conservación Guanacaste) 三个相邻生态系统的两动物多样性
Alex W Edwards1, Xavier A Harrison2, M Alex Smith3
1School of Biological and Marine Sciences, University of Plymouth, Plymouth, Devon, UK.
PeerJ
|November 30, 2023
概括
全球两动物数量正在减少,原因是气候变化和疾病. 在哥斯达黎加.
科学领域:
- 类学 类学 类学 类学
- 保护生物学 保护生物学
- 生态生态学 生态生态学
背景情况:
- 两动物面临着全球的衰退,受到气候变化和疾病的威胁,基线数据有限.
- 哥斯达黎加的瓜纳卡斯特保护区 (ACG) 在过去的三十年中经历了大量的两动物数量减少.
- 了解两动物的多样性模式对于在受威胁的新热带地区的保护至关重要.
研究的目的:
- 评估瓜纳卡斯特保护区 (ACG) 内的各种息地两动物物种丰富性和多样性模式.
- 将当代两动物物种丰富度与ACG的可可地区的历史数据进行比较.
- 评估气候变化和息地变化的对两动物种群的影响.
主要方法:
- 视觉接触调查在ACG的五个不同的地点进行:Murciélago,Santa Rosa,Maritza,San Gerardo和Cacao.
- 在调查期间,物种丰富的特征是基于距离和时间限制.
- 1987-1988年可可地区的历史两动物数据与当前的发现进行了比较.
主要成果:
- 热带雨林息地表现出两动物物种丰富度最高,支持比干旱森林多三倍的物种.
- 在可可地区观察到两动物物种丰富度大幅下降45%,从20种降至11种.
- 在被调查的息地中,物种丰富程度差异很大,云林和雨林的多样性高于干森林.
结论:
- 息地类型显著影响两动物物种丰富度,雨林至关重要.
- 瓜纳卡斯特保护区 (ACG) 显示两动物物种的历史性急剧下降,突出显示了环境变化的影响.
- ACG多样化的生态系统为研究热带群体对气候变化的弹性提供了独特的机会.
相关概念视频
Ecological Niches
23.7K
All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
23.7K
Threats to Biodiversity
22.3K
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...
22.3K
Hybrid Zones
17.0K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
17.0K
Habitat Fragmentation
17.5K
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.
17.5K
What is Biodiversity?
27.4K
Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
27.4K
What is an Ecosystem?
39.7K
Overview
39.7K


