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Related Concept Videos

Genetics of Speciation02:16

Genetics of Speciation

Speciation is the evolutionary process resulting in the formation of new, distinct species—groups of reproductively isolated populations.The genetics of speciation involves the different traits or isolating mechanisms preventing gene exchange, leading to reproductive isolation. Reproductive isolation can be due to reproductive barriers that have effects either before or after the formation of a zygote. Pre-zygotic mechanisms prevent fertilization from occurring, and post-zygotic mechanisms...
Speciation Rates01:07

Speciation Rates

Speciation can proceed at markedly different rates, and evolutionary biologists commonly describe these differences through the models of gradualism and punctuated equilibrium. Both patterns explain how new species arise, but they differ in the tempo and continuity of evolutionary change. In both cases, evolutionary change arises from heritable variation within populations, with natural selection often shaping traits that improve survival and reproduction under specific environmental conditions.
Multi-species Conserved Sequences02:51

Multi-species Conserved Sequences

Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale  studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
Formation of Species01:31

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.Allopatric SpeciationIn allopatric speciation, gene flow between two populations of the same species is prevented by a geographic barrier, like...
Hybrid Zones02:29

Hybrid Zones

Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.Gene flow and natural selection are evolutionary mechanisms that shape the outcome of a hybrid zone. Gene flow...
Evolutionary Relationships through Genome Comparisons02:54

Evolutionary 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...

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Related Experiment Video

Updated: Jun 28, 2026

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
10:23

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

Published on: July 11, 2025

JESS, a joint expert speciation system-III. Surrogate functions.

P M May1, K Murray

  • 1School of Mathematical and Physical Sciences, Murdoch University, Murdoch, Western Australia 6150, Australia.

Talanta
|June 1, 1993
PubMed
Summary

A new method combines equilibrium calculations with other chemical processes using empirical functions. This approach is useful for modeling speciation under varying ionic strength and temperature conditions.

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Area of Science:

  • Chemical Thermodynamics
  • Computational Chemistry
  • Environmental Chemistry

Background:

  • Accurate chemical speciation modeling is crucial for understanding environmental processes.
  • Existing models often struggle to integrate equilibrium calculations with dynamic chemical effects.
  • Changes in ionic strength and temperature significantly impact chemical equilibria and speciation.

Purpose of the Study:

  • To introduce a novel, general method for coupling equilibrium calculations with other chemical processes.
  • To demonstrate the method's applicability in speciation modeling.
  • To provide a more comprehensive approach to chemical modeling.

Main Methods:

  • Development of a general method utilizing simple empirical functions.
  • Coupling of equilibrium calculations with empirical functions representing chemical effects.
  • Application of the method to speciation modeling under varying ionic strength and temperature.

Main Results:

  • Successful integration of equilibrium calculations with other chemical processes.
  • Demonstration of the method's effectiveness in speciation modeling.
  • Accurate prediction of speciation changes due to variations in ionic strength and temperature.

Conclusions:

  • The new method offers a versatile and general approach to chemical modeling.
  • Empirical functions provide a practical way to incorporate complex chemical effects.
  • This method enhances the accuracy and scope of speciation modeling.