洪水变化导致温带湿地的二氧化碳和甲流动
Erin Hassett1, Gil Bohrer2, Lauren Kinsman-Costello3
1SUNY College of Environmental Science and Forestry, Syracuse, NY, United States of America.
The Science of the total environment
|January 15, 2024
概括
湿地淹水状态显著影响碳循环. 洪水条件有利于甲的释放,而较干燥的时期增加二氧化碳的吸收,强调了水位波动在湿地碳动态中的关键作用.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
背景情况:
- 湿地对全球碳循环至关重要,它们作为二氧化碳 (CO2) 和甲 (CH4) 的来源.
- 像溶解氧气,水深,植被和洪水状况这样的环境因素会影响这些碳流,但它们的相互作用效应尚未完全理解.
研究的目的:
- 调查环境和时间驱动因素对温带湿地的碳气体流量的影响.
- 描述洪水状态,水位和二氧化碳 (CO2) 和甲 (CH4) 排放之间的关系.
主要方法:
- 利用室内测量来评估植被和非植被地点的日间和季节性碳流模式.
- 从2022年7月到10月,每月监测溶解氧气和水位.
- 将基于室内的流量数据与状共变量塔测量结果进行比较.
主要成果:
- 洪水状况是碳流的主要驱动因素;洪水状况产生更高的甲 (CH4) 和更低的二氧化碳 (CO2) 流量,而干燥的条件显示相反.
- 湿地在被洪水淹没时充当了二氧化碳的净沉降池,但在低水期成为二氧化碳和CH4的来源.
- 埃迪协变塔的数据显示,无论海湾水位变化,CO2的吸收和CH4的释放都保持一致.
结论:
- 湿地淹水状况极大地影响碳循环,水位波动,特别是吸水,起着重要作用.
- 了解这些水文动态对于预测湿地对不断变化的气候条件的反应及其对碳捕获的影响至关重要.
更多相关视频
09:38Single-throughput Complementary High-resolution Analytical Techniques for Characterizing Complex Natural Organic Matter Mixtures
Published on: January 7, 2019
8.6K
11:19Measuring Carbon-based Contaminant Mineralization Using Combined CO2 Flux and Radiocarbon Analyses
Published on: October 21, 2016
12.0K
相关概念视频
Global Climate Change
24.4K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.4K
Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K
The Carbon Cycle
37.6K
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
37.6K
Adaptations that Reduce Water Loss
25.6K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.6K
Chemical Factors Affecting Respiration Centers
1.1K
Chemical factors such as changing CO2, O2, and H+ levels in arterial blood play a critical role in influencing respiration depth and rates. These variations are detected by chemoreceptors—specialized sensors located in two primary body areas. Central chemoreceptors are found throughout the brain stem, including the ventrolateral medulla, while peripheral chemoreceptors are located in the aortic arch and carotid arteries.
CO2 has a potent influence on respiration and is strictly regulated....
CO2 has a potent influence on respiration and is strictly regulated....
1.1K
Bioremediation
18.4K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
18.4K
