测量了珊瑚礁上加勒比海珊瑚中Symbiodiniaceae藻类的多年变化
Ross Cunning1, Elizabeth A Lenz2, Peter J Edmunds3
1Conservation Research Department, John G. Shedd Aquarium, Chicago, Illinois, United States.
PeerJ
|June 3, 2024
概括
监测珊瑚共生体揭示了珊瑚礁退化如何影响珊瑚的健康. 了解Symbiodiniaceae的多样性对于有效的珊瑚礁保护战略至关重要.
科学领域:
- 海洋生物学 海洋生物学
- 生态生态学 生态生态学
- 遗传学 是一个遗传学.
背景情况:
- 珊瑚礁退化是一个重要的生态问题,但仅仅监测珊瑚覆盖层往往无法识别根本原因或告知保护.
- 研究Symbiodiniaceae (珊瑚中的共生藻类) 的遗传多样性对于了解珊瑚健康和弹性至关重要,但经常被忽视.
研究的目的:
- 调查圣约翰,美国维尔京群岛常见的珊瑚物种中Symbiodiniaceae社区的时间动态.
- 评估环境干扰,如风和珊瑚病,如何影响珊瑚共生体组成.
- 评估不同采样策略的有效性,以监测珊瑚共生物多样性.
主要方法:
- 通过在标记的珊瑚群中对Symbiodiniaceae进行基因鉴定,在三年 (2017-2019) 的时间内增强了生态时间序列.
- 使用Symbiodiniaceae内部转录间隔器2 (ITS2) 测序来识别不同的遗传类型和个人资料.
- 在珊瑚物种,个体和随着时间的推移中比较了共生物种的多样性,考虑了主要的干扰事件.
主要成果:
- 确定了525个不同的Symbiodiniaceae序列,包括42个ITS2类型配置文件,宿主物种和个体之间的多样性不同.
- 观察到共生群体在三年内在珊瑚宿主中得到很大程度上保存,尽管存在显著的物理干扰和石珊瑚组织损失疾病的出现.
- 在所有宿主物种的殖民地中发现了主导共生体的变化,这表明如果珊瑚种群下降,可能会对罕见的藻类系产生潜在影响.
结论:
- 对Symbiodiniaceae的时间监测对于了解珊瑚礁生态和为保护提供信息至关重要,尤其是在面临越来越多的威胁的情况下.
- 珊瑚宿主丰度的下降可能会导致罕见的Symbiodiniaceae血统的丧失,特别是如果这些下降是对象特异性的.
- 随机抽取众多珊瑚的样本可能比重复抽取标记的个体更有效,以捕捉珊瑚共生群体的全部多样性和动态.
相关概念视频
Overview of Algae
1.5K
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...
1.5K
Red Algae
1.9K
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
1.9K
Diversity of Protists II
2.2K
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...
2.2K
Other Algae
592
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...
592
Diversity of Protists III
2.1K
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,...
2.1K
Diversity of Protists IV
2.1K
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...
2.1K


