躺平，就是，黑皇后，
韭菜，就是，紅皇后，
The Black Queen Hypothesis (BQH) is an evolutionary theory suggesting microorganisms can streamline their genomes by losing "leaky" essential genes if other community members provide the necessary, shared resources. It explains how, rather than genetic drift, natural selection can favor losing costly, yet vital, functions to boost efficiency, creating dependencies on "helper" species. [1, 2, 3]
Key Aspects of the BQH
- Proposed Origin: The hypothesis was introduced by Jeffrey Morris (with collaborators Richard Lenskiand Erik Zinser) in 2011/2012, as described on Wikipedia and in this NIH article.
- "Leaky" Functions: Functions that are partially public (e.g., detoxification of the environment) allow beneficiaries to stop performing the function, while others act as "helpers" or "Black Queens" that retain the gene.
- Evolutionary Advantage: Microbes shed genes to conserve energy and reduce the cost of replicating large genomes, enabling faster growth.
- Coexistence: The system creates a stable, co-dependent relationship, often with negative frequency dependence, where beneficiaries (cheaters) and helpers coexist, as noted in studies from PLOS Oneand ScienceDirect.
- Examples: The hypothesis helps explain genome reduction in marine bacteria like Prochlorococcus, which often lacks essential catalase-peroxidase genes to break down hydrogen peroxide, relying on other microbes to do it. [1, 2, 3, 4, 5, 6]
