陆地藻类:碳酸盐岩的先驱生物 在中国南方的石岩的溶解化
Ni Yan1,2,3, Jiawei Zhao1,2, Kangning Xiong1,2
1School of Karst Science, Guizhou Normal University, Guiyang, China.
Frontiers in microbiology
|March 1, 2024
概括
陆地藻类显著加速碳酸盐岩石的气候变化,有助于岩生态系统中的土壤形成. 与自然气候变化过程相比,这些先驱物种增加了三倍的岩石溶解.
科学领域:
- 地质地质地质地质地质地
- 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:
- 石土壤形成是一个关键的过程,受到岩石气候变化的影响.
- 陆地藻类殖民于裸露的碳酸盐岩层表面,可能调解气候变化.
- 藻类对溶液气候变化的强度的确切贡献仍然不太清楚.
研究的目的:
- 量化特定陆地藻类对碳酸盐岩石气候变化的影响.
- 研究藻类影响岩石溶解的机制.
- 评估藻类作为开拓性物种在岩生态系统发展中的作用.
主要方法:
- 使用两种藻类进行了气候模拟实验:Klebsormidium dissectum和Chlorella vulgaris.
- 碳酸盐岩基板在受控条件下暴露于藻类.
- 测量了藻类碳酸酶活性 (CAA) 和细胞外多糖体 (EPS) 分泌.
主要成果:
- *K. dissectum*和*C. vulgaris*都在碳酸盐岩石上表现出一种溶解气候效应.
- 与没有藻类的对照实验相比,藻类增加了碳酸盐岩石溶解的三倍.
- 藻类更高的碳酸酶活性和EPS分泌与加速的岩石气候变化相关.
结论:
- 陆地藻类在碳酸盐岩的溶液气候变化中发挥着重要作用.
- 藻类充当先驱物种,在岩环境中启动土壤形成过程.
- 这项研究提供了对藻类对岩生态系统的生物地球化学影响的定量证据.
相关概念视频
01:14The Carbon Cycle
37.4K
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.
37.4K
02:22The Colonization of Land
34.3K
Changes in the environment of the early Earth drove the evolution of organisms. As prokaryotic organisms in the oceans began to photosynthesize, they produced oxygen. Eventually, oxygen saturated the oceans and entered the air, resulting in an increase in atmospheric oxygen concentration, known as the oxygen revolution approximately 2.3 billion years ago. Therefore, organisms that could use oxygen for cellular respiration had an advantage. More than 1.5 years ago, eukaryotic cells and...
34.3K
01:21The Phosphorus Cycle
36.8K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
36.8K
01:06Primary Production
23.6K
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.
23.6K
02:17Ecological Succession
17.3K
Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
17.3K
01:27C4 Pathway and CAM
45.5K
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy.
C4 Pathway
The C4 pathway is used by plants such as...
C4 Pathway
The C4 pathway is used by plants such as...
45.5K