多变量特征分析显示,藻的可塑性受限于一组减少的生物轴
Phoebe A Argyle1, Nathan G Walworth2, Jana Hinners3
1Climate Change Cluster, University of Technology Sydney, Sydney, NSW, 2007, Australia. phoebe.argyle@uts.edu.au.
ISME communications
|November 8, 2023
概括
植物浮游生物的特征多样性不仅仅是由遗传学决定的. 现型可塑性产生各种特征,形成一个可预测的可塑性.
科学领域:
- 海洋生态海洋生态学
- 植物浮游生物学的生物学
- 基于特征的生态学
背景情况:
- 基于特征的方法在植物浮游生物生态学中越来越多地使用.
- 现型特征被整合到生态和生物地球化学模型中.
- 了解特征组合和可塑性对于预测生态系统反应至关重要.
研究的目的:
- 调查海洋藻属Thalassiosira的特征组合的内部和跨种类约束.
- 探索基因型多样性,表型多样性和表型可塑性之间的关系.
- 开发多变体表型的缩小维度表示 ('特征范围') 并评估其实用性.
主要方法:
- 在Thalassiosira藻中进行高通量表型化.
- 主要组件分析 (PCA) 将表型特征数据缩小为"特征景观".
- 对新环境条件的表型反应的评估.
主要成果:
- 在Thalassiosira内部的表型多样性是无法从基因型多样性中预测的.
- 表型可塑性可以导致不同的表型,独立于分类学分类.
- 一个"特征景观"有效地代表了缩小尺寸的多变体表型,其中77.7%的差异被两个轴捕获.
- 这种特征景观可以使用有限的特征集来重建.
- 环境变化扩大了特征值和特征范围,但反应模式和特征相关性在各个菌株中基本保持一致.
结论:
- 特征景观揭示了浮游植物多特征可塑性的共同约束,即使有不同的表型.
- 了解特征相关约束和权衡对于预测微生物对环境变化的反应至关重要.
- 将这些约束纳入模型将改善对未来元素循环影响的预测.
相关概念视频
01:29Three-Dimensional Analysis of Strain
222
Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
222
01:18Polygenic Traits
65.9K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
65.9K
01:21Plastic Deformations of Members with a Single Plane of Symmetry
92
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
92
01:27Diversity of Protists III
29
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,...
29
01:22Generalized Hooke's Law
998
The generalized Hooke's Law is a broadened version of Hooke's Law, which extends to all types of stress and in every direction. Consider an isotropic material shaped into a cube subjected to multiaxial loading. In this scenario, normal stresses are exerted along the three coordinate axes. As a result of these stresses, the cubic shape deforms into a rectangular parallelepiped. Despite this deformation, the new shape maintains equal sides, and there is a normal strain in the direction of the...
998
01:15Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
272
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
272