非同步的多重的水平调节变化显示出对湖泊色的弹性
Xu Chen1, Xue Bai2, Peter G Langdon3
1Hubei Key Laboratory of Critical Zone Evolution, School of Geography and Information Engineering, China University of Geosciences, Wuhan 430078, China; School of Geography and Environmental Science, University of Southampton, Southampton SO17 1BJ, UK.
The Science of the total environment
|November 28, 2023
概括
湖泊色会影响跨多个食物营养层的生态系统. 我们的研究表明,动物草草和混合营养藻类在潮湿环境中起着关键作用,影响湖泊生态平衡.
科学领域:
- 古代气候学是一种古气候学.
- 淡水生态学 淡水生态
- 气候变化科学 气候变化科学
背景情况:
- 由于溶解有机碳增加,气候变暖和沉积的增加,导致湖泊色化,构成了广泛的环境挑战.
- 了解对湖泊色的多营养水平反应对于有效的生态系统管理至关重要.
- 沉积物记录为湖泊的长期生态变化提供了宝贵的见解.
研究的目的:
- 为了研究在中国一个偏远的河头湖泊中对湖泊色的多营养水平反应.
- 分析藻,藻胃囊和藻类的变化,作为生态变化的指标.
- 确定这些转变背后的驱动力及其相对重要性.
主要方法:
- 来自三峡水库地区一个偏远的河头湖的沉积物核心分析.
- 沉积层的年代测定,以确定生物群落的时间变化.
- 对藻,藻胃囊细胞和藻类作为生物代理物的分析.
- 生物转移与温度,沉积 (δ15N) 和沿海的扩张 (δ13C) 等环境因素的相关性.
主要成果:
- 观察到社区转移的不同时间:基罗诺米德 (公元1886年±18年),植物 (公元1914年±10年) 和藻 (公元1941年±6年).
- 这些变化与温度上升,沉积,沿海的扩张和生物相互作用有关,在各个种类中,驱动因素的重要性各不相同.
- 在湿条件下,zoobenthos放牧成为潜在的主导因素,超过自下而上的路径.
- 20世纪50年代以后,各种藻类的共存表明,混合的化植物通过异质减轻了色.
结论:
- 湖泊色制度的变化需要多层次的分析才能全面理解.
- 混合植物的异质变性过程可以维持棕色化湖中的生态平衡.
- 异质性在碳循环中的作用可能会在经历水化的山地湖泊中增加.
相关概念视频
Threats to Biodiversity
22.3K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.3K
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
Speciation Rates
21.2K
Overview
21.2K
Ecological 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
Hybrid Zones
17.0K
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
17.0K
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


