Related Experiment Video
Updated: Mar 17, 2026
07:41
Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems
Published on: July 30, 2019
8.1K
Negative scaling relationship between molecular diversity and resource abundances
Atsushi Kamimura1, Kunihiko Kaneko1
1Department of Basic Science, The University of Tokyo, 3-8-1, Komaba, Meguro-ku, Tokyo 153-8902, Japan.
Physical Review. E
|July 15, 2016
Summary
Limited resources in cell systems drive component diversity. This diversity increases as resource uptake decreases, balancing resource utility with reaction efficiency for optimal growth.
Area of Science:
- Biophysics
- Systems Biology
- Theoretical Biology
Background:
- Cell reproduction involves replicating diverse molecular species.
- Understanding the drivers of molecular diversity in cells is crucial.
Purpose of the Study:
- To theoretically investigate how resource availability influences molecular diversity in a growing cell system.
- To model the relationship between resource uptake and the number of coexisting molecular species.
Main Methods:
- Theoretical modeling of a cell system with catalytic reaction dynamics.
- Analysis of growth by resource uptake from the environment.
Main Results:
- Limited environmental resources lead to increased internal molecular diversity.
- The number of coexisting species shows a negative power-law relationship with resource uptake rate.
Conclusions:
- Resource limitation is a key factor promoting molecular diversity in cellular systems.
- Cellular growth speed is optimized by a trade-off between resource utilization and reaction rate concentration.
Related Concept Videos
01:20Applications of Molecular Taxonomy
648
Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
648
03:33Genetic Drift
44.9K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
44.9K
01:09Mutation, Gene Flow, and Genetic Drift
65.6K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
65.6K
01:24Diversity of Archaea II
608
Archaea, one of the three domains of life, exhibit remarkable diversity and adaptability, thriving in both extreme and moderate environments. Historically, most identified archaea have been classified into two major phyla: Euryarchaeota and Crenarchaeota. However, recent molecular studies have expanded this classification to include three additional phyla: Thaumarchaeota, Nanoarchaeota, and Korarchaeota, each exhibiting unique characteristics and ecological roles.Thaumarchaeota: Mesophiles...
608
02:04Conservation of Small Populations
17.6K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
17.6K
01:27Diversity of Archaea III
421
Crenarchaeota, a prominent phylum of Archaea, is remarkable for its ability to thrive in extreme environments characterized by high temperatures and acidity. These microorganisms inhabit sulfuric hot springs, volcanic systems, and submarine hydrothermal vents, where temperatures often exceed 100°C. The unique adaptations of Crenarchaeota not only allow survival under such extreme conditions but also provide insights into the mechanisms of life in primordial Earth-like...
421