Related Experiment Video
Updated: Jun 20, 2026
05:58
Rearing Axenic Delia antiqua with Half-Fermented Sterile Diets
Published on: December 22, 2023
Parasites--the new frontier: celebrating Darwin 200
1Institute of Integrative Biology (IBZ), ETH-Zürich ETH-Zentrum CHN, Universitätsstrasse 16, CH-8092 Zürich, Switzerland. psh@env.ethz.ch
Biology Letters
|August 28, 2009
Summary
Parasites significantly influence evolution, driving adaptations in areas like sexual selection and behavior. Integrating parasite-host dynamics with ecological immunology offers new insights into evolutionary processes.
Area of Science:
- Evolutionary biology
- Parasitology
- Ecology
Background:
- Parasites, recognized by Darwin, are increasingly studied as significant selective factors.
- Evolutionary parasitology integrates behavioral/evolutionary ecology with population biology/ecology.
- This field illuminates old questions in evolutionary biology.
Purpose of the Study:
- To review the impact of parasites on evolutionary biology.
- To highlight the emergence of ecological immunology.
- To discuss the integration of mechanistic and adaptive approaches.
Main Methods:
- Review of existing literature in evolutionary parasitology and ecological immunology.
- Conceptual analysis of parasite-host interactions and their evolutionary consequences.
- Examination of how underlying mechanisms inform adaptive trait value.
Main Results:
- Parasite significance as selective factors is now well-established.
- Parasite influence is evident in sexual selection, evolution of sex, behavior, and life histories.
- Ecological immunology provides a cost-benefit framework for immune defenses.
Conclusions:
- Parasite-host interactions are crucial for understanding adaptation and evolution.
- Integrating mechanistic and adaptive frameworks is key for future research.
- Further conceptual and empirical studies are needed to fully understand parasite-driven evolution.
Related Concept Videos
01:24Evolution of New Traits in Microbes
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
01:22Microbial Interactions: Parasitism
Parasitism is a form of microbial interaction in which parasitic microbes exploit a host organism for nutrients and shelter, often at the host's expense. Unlike mutualistic relationships, where both organisms benefit, parasitism benefits only the parasite and harms the host.Classification of ParasitesMicrobial parasites are broadly classified based on their location relative to the host.Ectoparasites remain on the host’s surface, such as the skin or outer tissues, drawing nutrients...
02:56The Fossil Record
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
01:26Evolutionary Processes in Microbes
Microbial evolution occurs rapidly due to short generation times and a variety of genetic processes, including horizontal gene transfer, mutation, recombination, and genetic drift. These mechanisms collectively enable microbes to adapt swiftly to changing environments.Horizontal gene transfer (HGT) allows genes to move between different species and occurs through three main mechanisms: conjugation, transformation, and transduction. Conjugation involves direct cell-to-cell contact for DNA...
01:15Diversity of Protists I
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...
01:25Colonisation of Pathogens
Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...