Species concepts

1
Species concepts

• Classical (morphological) species concept
• Populations that are morphological similar and
  that differ morphologically from other
  populations, form a species.
• Advantages Fast, inexpensive, easy to use.
• Disadvantages Subjective, hybridization causes
  problems, only use morphology.
• Biological species concept
• Species are population that can interbreed
  randomly but that are reproductively isolated
  from other populations.
• Advantages Objective.
• Disadvantages Hybridization makes it time
  consuming, hybridization is not uniformly, cannot
  be used with large groups, cannot be done with
  agamic or polyploid groups.

2
Species concepts

• Evolutionary species concept
• A species is a parent-offspring lineage where the
  offspring differs evolutionary from the parents.
• Advantages May use any type of data, relative
  objective.
• Disadvantages Computer based, type of data
  should be selected carefully, depending on the
  type of data used, it may become time consuming.
• Genomic species concept
• A species contains certain genomes, although the
  number and ration of these genomes may differ
  between different individuals.
• Advantages Best method, objective.
• Disadvantages The most time consuming method,
  hybridization can cause problems with the
  interpretation.