二氧化碳和甲气体的交换在北极泥炭地采摘藻后发生
Satu K Karjalainen1, Jani Anttila1, Liisa Maanavilja2
1Natural Resources Institute Finland (Luke), Latokartanonkaari 9, 00790 Helsinki, Finland.
Journal of environmental management
|November 27, 2024
概括
收获藻影响了泥炭土的碳平衡. 收获对温室气体排放的影响取决于水分,湿地显示甲增加,干地起初充当二氧化碳来源,然后下沉.
科学领域:
- 环境科学 环境科学
- 泥炭地生态 泥炭地生态
- 气候变化研究 气候变化研究
背景情况:
- 收获藻是一种新兴的土地利用方式,对泥炭土碳循环的影响尚不清楚.
- 泥炭地是关键的碳汇,它们的干扰需要仔细评估环境影响.
研究的目的:
- 为了研究藻收获对泥炭地碳平衡和温室气体排放的影响.
- 通过分析二氧化碳 (CO2) 和甲 (CH4) 流量来评估收获实践的可持续性.
主要方法:
- 现场研究芬兰8个被采伐的泥炭地 (2015-2021年).
- 测量二氧化碳 (NEE) 和CH4排放的生态系统净交换.
- 评估与水分水平相关的Sphagnum再生和植被继承.
主要成果:
- 脊柱菌的再生有显著的差异:2-28%在湿带采摘的地点,而在干燥的清晰采摘的地点是最小的.
- 温室气体排放取决于水分;湿地随着时间的推移增加了CH4和Eriophorum vaginatum覆盖.
- 年轻,干燥的土地是二氧化碳的来源,而较旧的干燥地带有灌木成为二氧化碳的吸收;湿地在植被恢复时从较低的二氧化碳吸收能力过渡到更高的二氧化碳吸收能力.
结论:
- 在Sphagnum收获后的泥炭地碳平衡高度依赖于水分和植被恢复.
- 有效的二氧化碳捕获与适当的地下水位有关,这对于藻的恢复至关重要.
- 了解这些动态对于可持续管理被采伐的泥炭地至关重要.
相关概念视频
00:46Bioremediation
18.2K
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.
18.2K
01:20Gas Exchange and Transport
67.9K
Gas exchange, the intake of molecular oxygen (O2) from the environment and the outflow of carbon dioxide (CO2) into the environment, is necessary for cellular function. Gas exchange during respiration occurs largely via the movement of gas molecules along pressure gradients. Gas travels from areas of higher partial pressure to areas of lower partial pressure. In mammals, gas exchange occurs in the alveoli of the lungs, which are adjacent to capillaries and share a membrane with them.
67.9K
01:22The Sulfur Cycle
43.7K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
43.7K
02:04Regulation of Transpiration by Stomata
27.8K
During photosynthesis, plants acquire the necessary carbon dioxide and release the produced oxygen back into the atmosphere. Openings in the epidermis of plant leaves is the site of this exchange of gasses. A single opening is called a stoma—derived from the Greek word for “mouth.” Stomata open and close in response to a variety of environmental cues.
27.8K
01:20Respiration and Gaseous Exchange
1.4K
The intricate interplay between the cardiovascular and respiratory systems is crucial for efficiently transporting respiratory gases throughout the body. Let us explore the cardiovascular system's multifaceted functions, emphasizing its pivotal role in gas exchange.
Respiration involves the exchange of gases, especially oxygen (O2) and carbon dioxide (CO2), between the alveoli and body cells, a process facilitated by blood circulation. As a result, the cardiovascular system, which involves...
Respiration involves the exchange of gases, especially oxygen (O2) and carbon dioxide (CO2), between the alveoli and body cells, a process facilitated by blood circulation. As a result, the cardiovascular system, which involves...
1.4K
01:30Environmental Applications of Microorganisms
2
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
2