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相关概念视频

Primary Production01:06

Primary Production

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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.
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相关实验视频

Updated: Jul 4, 2025

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds
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Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds

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在营养研究中优先考虑河流流域.

Anthony J Tesoriero1, Dale M Robertson2, Christopher T Green3

  • 1U.S. Geological Survey, Portland, OR, USA. tesorier@usgs.gov.

Environmental monitoring and assessment
|February 9, 2024
PubMed
概括

优先考虑美国排水盆地的营养研究至关重要. 两种方法",影响"和"变性",确定了研究营养污染对水质和生态系统影响的关键领域.

关键词:
盆地选择盆地选择联邦研究研究.水文学的水文学监控设计 监控设计营养素 营养素 营养素水的质量 水的质量

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Last Updated: Jul 4, 2025

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科学领域:

  • 环境科学 环境科学
  • 水文学的水文学
  • 生态生态学 生态生态学

背景情况:

  • 较高的 (N) 和 (P) 流量导致重大环境问题,包括饮用水退化,环保化,有害藻类繁殖,气候变化和生物多样性丧失.
  • 解决这些复杂,大规模的问题需要在代表性排水盆地的研究工作的战略优先级.

研究的目的:

  • 开发和应用系统的,定量方法来优先排水盆地营养研究在整个邻的美国.
  • 确定受营养污染影响最大的盆地以及营养来源和运输因素变化最大的盆地.

主要方法:

  • 开发了两种基于地理空间数据的方法:"影响"方法和"变化"方法.
  • "影响"方法使用了营养度,来源和受体影响 (生态系统,人类健康) 的变量.
  • "可变性"方法包括营养度,来源/运输因素,模型准确性和受体影响.

主要成果:

  • 在全国和18个水文区域内排名163个排水盆地.
  • 在全国范围内",影响"方法的热点在中西部; "变化"方法的热点分散.
  • 从区域来看,这些方法在18个地区中的15个地区确定了不同的排名最高的盆地,其中"变化"盆地显示了更广泛的度范围.

结论:

  • "变性"方法有利于研究景观因素如何影响地表水质和生态系统健康.
  • "影响"方法有效地针对高营养度和人类发展的地区,表明减缓行动在哪里可以为水资源和生态系统带来最大的益处.