相关实验视频

Updated: Jun 24, 2025

Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity

Methods for Characterizing the Co-development of Biofilm and Habitat Heterogeneity

Published on: March 11, 2015

鱼类贝塔多样性与水文和人为干扰梯度相关,在对比的溪流流程中

J Tyler Fox¹, Daniel D Magoulick²

¹Arkansas Cooperative and Wildlife Research Unit, Department of Biological Sciences, University of Arkansas, Fayetteville, AR, USA.

The Science of the total environment

|June 10, 2024

概括

水文变化显著塑造淡水鱼群,空间周转是河流流程之间多样性差异的主要驱动因素. 保护工作应采用以流域为中心的战略,以有效保护物种.

科学领域:

生态生态学生态生态学
淡水生物学淡水生物学
保护科学保护科学

背景情况:

了解水文变异是管理淡水生物多样性的关键.
贝塔多样性分为空间周转和嵌套性,揭示了社区变革的驱动因素.

研究的目的:

为了检查河流鱼类在水文和人为干扰梯度上的β多样性.
评估不同的溪流流程如何影响鱼群组成.

主要方法:

分析了252个物种的长期 (1916-2016年) 鱼类发生记录 (n=17,375) .
在六个流量流程中将β多样性分为空间周转和嵌套性.
与水文和人为变量相关联的β多样性.

主要成果:

空间周转,而不是嵌套性,主要推动了河流流动模式之间的β多样性差异 (> 86%).
最高的鱼类β多样性和空间周转发生在中间流稳定性流 (地下水闪闪发光) 中.
流量稳定的流量显示出更低的周转率和更高的嵌套率;与季节性水文学相关的周转率,特别是在间歇性流中.

结论:

鱼群结构受到水文变化和空间周转的强烈影响.
人为干扰与β多样性相关,特别是在地下水稳定流中.
有效的鱼类保护需要以流域为重点的方法,针对多个空间分布的河流.

关键词:

组装的营业额组装的营业额生态水文学生态水文学环境流动环境流动流动生态学流动生态学中间干扰是一种中介干扰.间歇性流是间歇性的流.嵌套效应嵌套效应嵌套效应

更多相关视频

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems

Published on: October 29, 2016

相关概念视频

What is an Ecosystem?

What is an Ecosystem?

What is Biodiversity?

What is Biodiversity?

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.

Habitat Fragmentation

Habitat Fragmentation

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.

Ecological Disturbance

Ecological Disturbance

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.

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Hybrid Zones

Hybrid Zones

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.