亚马逊河流中的土地利用如何影响动物浮游生物的功能性协会?
Francieli F Bomfim1, Sabrina Deosti2, Nayara Louback-Franco1
1Laboratório de Ecologia de Produtores Primários, Programa de Pós Graduação em Ecologia, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, Pará, Brazil.
PloS one
|August 1, 2023
概括
亚马逊河流的土地使用变化不会改变动物浮游生物的组成. 然而,诸如树冠覆盖和等环境因素影响了这些协会的分布,表明了河流的健康状况.
科学领域:
- 生态生态学 生态生态学
- 淡水生物学 淡水生物学
- 环境科学 环境科学
背景情况:
- 亚马逊河流对生物多样性和生态系统服务至关重要,面临土地利用变化的威胁.
- 土地利用变化可能会影响物种组成和食用动态,特别是在动物浮游生物群落.
- 了解动物浮游生物的功能性协会对于评估人类影响环境中的河流健康至关重要.
研究的目的:
- 调查土地使用如何影响亚马逊河流中动物浮游生物功能协会的组成.
- 确定驱动动物浮游生物功能协会沿着土地利用梯度分布的局部物理化学变量.
主要方法:
- 动物浮游生物和物理化学变量从巴西巴卡雷纳州的17个水体中取样.
- 森林覆盖,作为土地使用的代理,使用数字图像处理来确定.
- 动物浮游生物物种根据养策略被分为五个功能性协会.
主要成果:
- 总共有98种动物浮游生物种群被记录下来,过器食者是最丰富的协会.
- 动物浮游生物的功能性协会组成在土地利用梯度上没有显著变化.
- 功能性协会的分布受到环境变量的影响:与树冠覆盖相关的抓式食器,总的吸吸器/掠食者食器和总悬浮固体的过器/猛禽食器.
结论:
- 虽然土地使用没有改变功能性协会组成,但当地环境变量影响了亚马逊河流中的动物浮游生物协会分布.
- 抓鱼可能表明较高的树冠覆盖带有较少干扰的溪流.
- 其他功能性协会与和悬浮固体等变量的关联表明,改变流条件的潜在影响.
相关概念视频
What is an Ecosystem?
39.8K
Overview
39.8K
Keystone Species
21.7K
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...
21.7K
Ecological Niches
23.8K
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.
23.8K
Osmoregulation in Fishes
49.9K
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?
49.9K
Trophic Efficiency
20.7K
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.
20.7K
Primary Production
23.7K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.7K


