Related Experiment Video
Updated: Jun 25, 2025
07:34
Probing the Limits of Egg Recognition Using Egg Rejection Experiments Along Phenotypic Gradients
Published on: August 22, 2018
8.2K
Coevolution with hosts underpins speciation in brood-parasitic cuckoos.
N E Langmore1, A Grealy1,2, H-J Noh1
1Research School of Biology, Australian National University, Canberra, Australia.
Science (New York, N.Y.)
|May 30, 2024
Summary
Coevolution drives speciation in brood-parasitic cuckoos. Host rejection selects for mimicry, causing genetic divergence and increasing biodiversity through evolutionary diversification.
Area of Science:
- Evolutionary biology
- Speciation research
- Biodiversity science
Background:
- Coevolution is theorized to increase biodiversity, but links between microevolution and macroevolutionary patterns are limited.
- Brood parasitism presents a unique system for studying coevolutionary dynamics and speciation.
Purpose of the Study:
- To investigate the role of coevolution in the speciation of brood-parasitic cuckoos.
- To connect microevolutionary processes with macroevolutionary outcomes in cuckoo-host interactions.
Main Methods:
- Utilized two decades of behavioral research on cuckoo-host interactions.
- Employed historical DNA analysis to trace evolutionary lineages.
- Analyzed speciation rates and patterns in relation to parasite virulence and host exploitation.
Main Results:
- Coevolution with hosts is a key driver of speciation in bronze-cuckoos.
- Highly virulent brood parasites exhibit higher speciation rates and increased sympatric speciation compared to less-virulent relatives.
- Host rejection of nestlings selects for mimicry, leading to genetic and phenotypic divergence in brood parasites exploiting multiple hosts.
Conclusions:
- Microevolutionary mimicry driven by host-parasite interactions fuels macroevolutionary diversification.
- This study elucidates a common yet under-characterized evolutionary process driving biological diversification.
- Understanding coevolutionary dynamics is crucial for comprehending biodiversity patterns.
Related Concept Videos
01:07Speciation Rates
21.2K
Overview
21.2K
01:31Formation of Species
39.2K
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.
39.2K
02:16Genetics of Speciation
19.2K
Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.
19.2K
01:54Convergent Evolution
27.7K
Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
27.7K
00:58Symbiosis
27.7K
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
27.7K
02:55The Evidence for Evolution
42.7K
Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
42.7K