来自马尔基萨斯群岛周围的多种真核植物浮游生物,通过结合显微镜和分子技术进行记录
Jana Veselá-Strejcová1, Eleonora Scalco2, Adriana Zingone2
1Institute of Parasitology, Biology Centre, Czech Academy of Sciences, 37005 České Budějovice (Budweis), Czech Republic.
Protist
|June 16, 2023
概括
马尔基萨斯群岛附近的海洋浮游植物被使用显微镜和遗传方法识别出来. 研究人员发现了289种类型,突出显示了藻和恐龙虫的多样性,发现了许多未知的物种.
科学领域:
- 海洋生物学 海洋生物学
- 海洋学 海洋学 海洋学
- 微生物生态学 微生物生态学
背景情况:
- 植物浮游生物构成了海洋食物网的基础.
- 开放海洋植物浮游生物的物种组成和生态尚不清楚.
- 南太平洋的马尔奎萨群岛地区是海洋生物多样性的关键地区.
研究的目的:
- 为了描述马奎萨斯群岛附近的植物浮游生物社区结构.
- 为了比较显微镜和分子方法用于植物浮游生物的识别.
- 揭示该地区未知的和未经研究的植物浮游生物种群.
主要方法:
- 在塔拉海洋探险期间从四个地点和两个深度收集样本.
- 使用光显微镜,扫描电子显微镜和共聚焦激光扫描显微镜进行详细分析.
- 18S rRNA元编码用于社区组成分析.
主要成果:
- 鉴定了289种植物浮游生物种群,其中Dinophyceae (60%) 和Bacillariophyceae (32%) 主导.
- 在具有高自营生物质的地点,二体达到高细胞密度 (1.26 × 10^4 细胞L^-1).
- 显微镜揭示了许多未知的或研究不足的物种,补充了元编码数据.
- 元编码结果通常与基于显微镜的估计结果一致,特别是对于藻.
结论:
- 这项研究提供了对马尔奎萨群岛附近植物浮游生物群落的详细见解.
- 显微镜和分子技术的结合为植物浮游生物评估提供了一个全面的方法.
- 显著的多样性和未知种群的存在强调了对开放海洋生态系统的进一步研究的需要.
相关概念视频
01:27Diversity of Protists IV
49
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...
49
01:27Diversity of Protists II
60
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...
60
01:27Diversity of Protists III
59
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,...
59
01:15Diversity of Protists I
46
Excavata is a diverse group of protists that includes both chemoorganotrophic and phototrophic species, with some thriving in anaerobic environments. Among the key groups within Excavata are diplomonads and parabasalids, which are flagellated protists that lack mitochondria and chloroplasts. These microorganisms typically inhabit anoxic environments, such as the intestines of animals, where they exist either symbiotically or as parasites, relying on fermentation for energy production. Some...
46
01:19Other Algae
49
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
49
01:28Overview of Algae
62
The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
62