相关实验视频
Updated: Jul 15, 2025

14:59
Determination of Total Lipid and Lipid Classes in Marine Samples
Published on: December 11, 2021
4.6K
鱼类物种的数量,更高的分类类型,和家族遗传相似性随着度和深度而减少,深海组合是独特的
Han-Yang Lin1, Shane Wright1, Mark John Costello2
1Institute of Marine Science, University of Auckland, Auckland, New Zealand.
PeerJ
|October 2, 2023
概括
海洋鱼类的多样性,包括物种丰富和植物遗传多样性,在热带和亚热带地区达到顶峰. 保护工作应优先考虑这些地区,考虑度和深度,以保护进化历史.
科学领域:
- 海洋生物学 海洋生物学
- 生物多样性科学 生物多样性科学
- 进化生物学 进化生物学
背景情况:
- 种类丰富性通常从极地增加到热带,在赤道上对海洋鱼类略有下降.
- 遗传学多样性为进化历史提供了洞察力,补充了生物多样性评估的物种丰富性.
- 识别高物种和植物遗传多样性的地区对于有效的海洋保护战略至关重要.
研究的目的:
- 为了比较度和深度梯度的物种丰富性和海洋鱼类的植物遗传多样性.
- 调查不同鱼群 (骨,软骨) 和深度区域在多样性模式中如何变化.
- 根据物种和植物遗传多样性的结合,确定保护的优先区域.
主要方法:
- 分析了5,619种海洋鱼类的模拟范围,横跨度 (75°S至75°N) 和深度梯度 (0-6000米).
- 量化物种丰富性和三个基因多样性的测量:平均基因多样性 (AvPD),较高分类层次的总和 (STL) 和STL/物种 (STL/spp).
- 对所有鱼类,骨类鱼类,软骨鱼类和四个深度区域进行了差异化分析.
主要成果:
- 种类丰富性和更高的分类丰富性 (STL) 在热带/亚热带地区是最高的,在赤道上呈现下降,并且跨群和深度相关.
- 较温暖,较浅的环境 (低度,浅水) 与较冷,更深的环境相比,表现出更为密切的遗传关系 (较低的AvPD,STL/spp).
- 在不同的深度区域中发现了不同的物种组合,表明了独特的进化途径.
结论:
- 热带和亚热带度和浅水深处是海洋鱼类物种和植物遗传多样性的热点.
- 更温暖,更浅的海洋环境可能经历了更高的进化速度.
- 保护战略必须涵盖所有度和深度区域,以确保全面保护海洋生物多样性和进化遗产.
相关概念视频
What is an Ecosystem?
39.7K
Overview
39.7K
Diversity of Protists III
42
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,...
42
What is Biodiversity?
27.4K
Biodiversity describes the variety of living things at multiple organizational levels: genetic, species and ecosystem diversity. Species diversity includes all branches of the evolutionary tree from single-celled prokaryotic organisms, bacteria, and archaea, to the eukaryotic kingdoms: plants; animals; fungi; and protists. To date, there have been about 1.75 million species identified, and new species are discovered every week.
27.4K
Diversity of Protists IV
33
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...
33
Diversity of Protists II
33
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...
33
Diversity of Protists I
31
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...
31

