Towards understanding insect species introduction and establishment: A community-level barcoding approach using
Eduardo Jiménez-García1,2, Carmelo Andújar1, Heriberto López1
1Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), La Laguna, Spain.
Molecular Ecology
|April 28, 2023
Summary
Species preadaptation, not competition, better explains successful introductions in Canary Islands beetles. This study highlights a significant gap in arthropod biodiversity data, termed the Humboldtean shortfall.
Area of Science:
- Ecology
- Evolutionary Biology
- Biodiversity Science
Background:
- Darwin's naturalization conundrum explores why some introduced species thrive outside their native ranges.
- Two main hypotheses are preadaptation (species suited to new environments) and competition (native species are weak competitors).
- The relative importance of these hypotheses remains debated, especially within arthropod communities.
Purpose of the Study:
- To evaluate the relative support for preadaptation versus competition hypotheses in Canary Islands' laurel forest beetle communities.
- To assess the utility of DNA barcoding for understanding species' native or introduced status in arthropod research.
Main Methods:
- Generated a mitogenome backbone tree using cytochrome c oxidase I (COI) sequences for Canary Islands beetle genera.
- Phylogenetically placed native and introduced species sampled in laurel forests.
- Assembled and placed COI sequences for introduced species not found in laurel forests for comparative analysis.
Main Results:
- Found stronger evidence supporting the preadaptation hypothesis over resource competition for introduced beetles.
- Identified a significant shortfall in biodiversity data regarding the native or introduced status of arthropod species, termed the Humboldtean shortfall.
Conclusions:
- Species preadaptation appears to be a more influential factor than resource competition in the establishment of introduced beetles in this ecosystem.
- The study emphasizes the need for improved arthropod biodiversity data and recommends DNA barcoding to address the Humboldtean shortfall.
Related Concept Videos
01:17Understanding Species and Reproductive Barriers
A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...
02:54Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
01:28Methods of Classification and Identification
Bacterial identification relies on a diverse array of techniques to classify and understand microorganisms, each tailored to uncover specific characteristics. Traditional morphological approaches, while still valuable, are limited for closely related or structurally simple organisms. Modern methods integrate biochemical, serological, genetic, and advanced molecular tools to achieve greater accuracy.Morphological and Biochemical TechniquesMorphological characteristics, such as cell shape and...
01:29Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
01:20Applications of Molecular Taxonomy
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...