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Speciation Rates

Speciation Rates

Types of Genetic Transfer Between Organisms

Types of Genetic Transfer Between Organisms

Types of Genetic Transfer Between Organisms

Types of Genetic Transfer Between Organisms

Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.

Formation of Species

Formation of Species

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.

Gene Flow

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

Migration

Migration

Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.

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Related Experiment Video

Updated: Dec 23, 2025

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

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Published on: July 11, 2025

Species groups can be transferred across different scales.

Petr Petřík¹, Helge Bruelheide²

¹Institute of Botany, Academy of Sciences of the Czech Republic, Průhonice, Czech Republic.

Journal of Biogeography

|April 22, 2020

Summary

Species groups identified at fine scales are more transferable to broader scales. This finding aids in predicting missing species in large-scale surveys using detailed vegetation data.

Keywords:

COCKTAIL method Czech Republic Ellenberg indicator values distribution grid mapping multivariate analysis sampling bias scaling vascular plants vegetation

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Area of Science:

Ecology
Biogeography
Plant Community Ecology

Background:

Species assemblages, or groups, are fundamental units in ecological studies.
Understanding how these groups behave across different spatial scales is crucial for ecological generalization.

Purpose of the Study:

To assess the transferability of statistically derived species groups between broad, medium, and fine spatial scales.
To identify environmental factors driving species group composition at different scales.

Main Methods:

Utilized the COCKTAIL algorithm to identify species groups from floristic and vegetation data across three scales.
Performed cross-scale transferability analysis of identified species groups.
Employed canonical correspondence analysis (CCA) to determine driving factors for species group distribution.

Main Results:

Six out of twelve initially identified species groups were consistent across all three spatial scales.
Species groups derived from fine scales showed higher correspondence when applied to broader scales than vice versa.
Forest cover, altitude, and bedrock type were key drivers of species group variation across scales.

Conclusions:

Species group transferability is scale-dependent, with fine-scale groups being more robust for broader-scale applications.
This research provides a method for predicting species occurrences in large-scale surveys using fine-scale vegetation data.