季风驱动的植物浮游生物大小类和热带状态之间的相互作用在热带海岸湖中的热带海岸湖
Sambit Singh1, Susmita Raulo1, Tamoghna Acharyya2
1Kerala University of Fisheries and Ocean Studies (KUFOS), Kochi, Kerala, India.
The Science of the total environment
|August 8, 2025
概括
皮科植物浮游生物在热带湖中占主导地位,即使在安食状态下,也会影响食物网. 季风驱动水文学的季节性变化会影响浮游植物的大小类别和湖的生产力.
科学领域:
- 水生生态学 水生生态学
- 临界技术 临界技术
- 海洋学 海洋学 海洋学
背景情况:
- 热带沿海湖面临淡水流入季节性变化,影响热带状态.
- 植物浮游生物大小类 (PSC) 对水文变异性的反应尚不清楚.
- 印度的奇利卡湖为研究这些动态提供了一个模型系统.
研究的目的:
- 在奇利卡湖 (Chilika Lagoon) 调查植物浮游生物大小类分布.
- 分析PSC与热量水平指数 (TLI) 之间的关系.
- 了解季风水文对湖热流动学的影响.
主要方法:
- 从2018-2019年开始,每月通过盐度梯度采样.
- 使用HPLC辅助的色素化学分类法进行植物浮游生物大小类别的表征.
- 用环境变量计算热量水平指数 (TLI) 和冗余分析 (RDA).
主要成果:
- 奇利卡湖因营养物质减少和度增加而从缩 (2018年) 转变为中缩 (2019年).
- 皮科植物浮游生物始终占主导地位 (66-76%),显示了适应性的优势.
- 微型浮游生物在季风期间增加,这与度和酸盐的可用性有关.
- RDA证实了PSC与环境因素 (盐度,度,营养物质) 之间的时空联系.
结论:
- 皮科植物浮游生物的主导地位支持微生物食物网,特别是在季风前后的季节.
- 季风期间微型浮游生物的增加表明,人们正在转向混合的食物营养结构.
- 在PSC的季节性变化显著影响能源传输效率和湖的生产力.
相关概念视频
Trophic Efficiency
21.7K
Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
21.7K
Primary Production
23.9K
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.
23.9K
Diversity of Protists IV
123
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
123
Diversity of Protists III
127
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
127
Diversity of Protists II
135
Alveolates are a group of organisms recognized by the presence of alveoli, which are cytoplasmic sacs located beneath the cell membrane. While their function remains uncertain, alveoli may help regulate water balance by controlling how much water enters and leaves the cell. In dinoflagellates, these structures may serve as armor plates. There are three major types of alveolates: ciliates, which move using cilia; dinoflagellates, which use flagella for movement; and apicomplexans, which are...
135
Trophic Levels
31.9K
All organisms in an ecosystem occupy a trophic level in the food chain. The lowest level consists of primary producers, which synthesize their food from either solar or chemical energy. Each subsequent level obtains energy from the levels below. Detritivores can occupy any of the levels above primary producers.
31.9K


