连接着火,食物网和河流生态系统中的鱼.
David A Roon1, J Ryan Bellmore2, Joseph R Benjamin3
1Oregon State University, Department of Forest Ecosystems & Society, Corvallis, Oregon USA.
概括
野火可以通过各种途径影响水生生态系统和鱼群. 食品网络建模显示,火灾严重程度和其他因素影响短期和长期生物质动态,对溪流生态系统的结果各不相同.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 水生生态系统 水生生态系统
背景情况:
- 野火制度正在发生转变,引发了对水生生态系统和鱼群的担忧.
- 预测鱼类对野火的反应是复杂的,因为有多种相互作用的途径.
- 整个生态系统的方法,如食物网络建模,对于理解这些复杂的相互作用是有价值的.
研究的目的:
- 应用动态食物网模拟模型来评估野火对河流生态系统的影响.
- 研究野火严重程度如何影响周边生物,无脊椎动物和鱼类的短期和长期生物质动态.
- 确定驱动水生生态系统对山火的反应的关键因素.
主要方法:
- 利用动态食物网模拟模型将热带动态与野火效应联系起来.
- 模拟野火对周边生物,水生无脊椎动物和鱼类生物质的影响.
- 分析了西太平洋西北流的不同火灾严重程度,时间尺度和热带水平的反应.
主要成果:
- 野火通常会在短期和长期内增加模拟的周围生物,无脊椎动物和鱼类生物量.
- 模拟的反应在方向,幅度和持续时间上有显著的变化,这取决于火灾的严重程度,火灾发生后的时间和热量级.
- 水温,树冠覆盖,河岸阴影和度是影响反应轨迹的敏感因素.
结论:
- 野火对水生生态系统的影响是复杂的,取决于环境,导致不同的反应.
- 食物网模型是一个有用的启发式工具,用于理解火-生态系统-鱼的联系.
- 确定火灾可能对鱼类产生负面影响的特定环境对于资源管理至关重要.
更多相关视频
09:35Fluorescently Labeled Bacteria as a Tracer to Reveal Novel Pathways of Organic Carbon Flow in Aquatic Ecosystems
Published on: September 13, 2019
7.0K
12:24Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout Salvelinus namaycush from Its Prey
Published on: August 29, 2014
10.9K
相关概念视频
Trophic Levels
30.6K
All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food from either solar or chemical energy. Each subsequent level obtains energy from the levels below. Detritivores can occupy any of the levels above primary producers.
30.6K
What is an Ecosystem?
39.3K
Overview
39.3K
Production Efficiency
16.7K
Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
16.7K
Trophic Efficiency
20.3K
Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
20.3K
Fixed Action Patterns
15.8K
A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
15.8K
Osmoregulation in Fishes
49.3K
When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
49.3K
