Did a Miocene-Pliocene island isolation sequence structure diversification of funnel web spiders in the Taiwan-Ryukyu Archipelago?

Yong Chao Su, Rafe M. Brown, Yung Hau Chang, Chung Ping Lin, I. Min Tso

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Aim: We tested the competing hypotheses concerning the relative importance of Pleistocene versus Miocene-Pliocene geological events for the formation of endemism in an Asian archipelago using the Macrothele taiwanensis (Hexathelidae) species group. Location: Taiwan-Ryukyu Archipelago. Methods: We estimated phylogenetic trees from cytochrome oxidase I subunit (COI) and 16S rRNA (16S) gene regions and employed Bayesian ancestral range reconstructions to investigate previously debated models of lineage diversification in the Taiwan-Ryukyu Archipelago. To evaluate alternative geological timeframes for their importance in shaping the genetic structure of funnel web spiders, we used five time calibration schemes to estimate timing of divergence, infer ancestral distributions, and to reconstruct historical demographic changes in each lineage. We tested taxonomic boundaries with two species delimitation procedures. Results: Our results indicate a north-to-south isolation sequence of the M. taiwanensis group: the Amami lineage diverged first, then Yaeyama, and finally the Taiwanese lineages. Divergence time estimation and population demographic change analyses indicate that Pleistocene climate fluctuations minimally impacted the genetic structure of these spiders. Instead, estimated divergence events correspond to Miocene-Pliocene geological events, strongly supporting a much older timeframe for diversification. The results of species delimitation analyses coincide well with morphological differences observed among the island populations, reinforcing inferred species boundaries, and at least three potential cryptic species were statistically detected within Taiwan. Main conclusions: Miocene-Pliocene geological events appear to have contributed disproportionately to diversification in the M. taiwanensis species group. The clear association between geographical area, genetic structure and statistical species delimitation strongly supports an interpretation of allopatric speciation. We advocate comparing our results with those derived from additional study organisms with similar life histories to further explore the Miocene-Pliocene diversification hypothesis.

Original languageEnglish
Pages (from-to)991-1003
Number of pages13
JournalJournal of Biogeography
Volume43
Issue number5
DOIs
Publication statusPublished - 2016 May 1

Fingerprint

spider web
Ryukyu Archipelago
archipelago
Taiwan
Pliocene
Miocene
Hexathelidae
demographic statistics
allopatric speciation
genetic structure
divergence
cytochrome-c oxidase
Araneae
indigenous species
calibration
life history
ribosomal RNA
climate
Pleistocene
phylogeny

Keywords

  • Allopatric speciation
  • Continental islands
  • Cryptic species
  • Endemism
  • Macrothele
  • Phylogeography
  • Species delimitation

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Did a Miocene-Pliocene island isolation sequence structure diversification of funnel web spiders in the Taiwan-Ryukyu Archipelago? / Su, Yong Chao; Brown, Rafe M.; Chang, Yung Hau; Lin, Chung Ping; Tso, I. Min.

In: Journal of Biogeography, Vol. 43, No. 5, 01.05.2016, p. 991-1003.

Research output: Contribution to journalArticle

@article{1415fc30f65e4089981aa87bc5c7c70f,
title = "Did a Miocene-Pliocene island isolation sequence structure diversification of funnel web spiders in the Taiwan-Ryukyu Archipelago?",
abstract = "Aim: We tested the competing hypotheses concerning the relative importance of Pleistocene versus Miocene-Pliocene geological events for the formation of endemism in an Asian archipelago using the Macrothele taiwanensis (Hexathelidae) species group. Location: Taiwan-Ryukyu Archipelago. Methods: We estimated phylogenetic trees from cytochrome oxidase I subunit (COI) and 16S rRNA (16S) gene regions and employed Bayesian ancestral range reconstructions to investigate previously debated models of lineage diversification in the Taiwan-Ryukyu Archipelago. To evaluate alternative geological timeframes for their importance in shaping the genetic structure of funnel web spiders, we used five time calibration schemes to estimate timing of divergence, infer ancestral distributions, and to reconstruct historical demographic changes in each lineage. We tested taxonomic boundaries with two species delimitation procedures. Results: Our results indicate a north-to-south isolation sequence of the M. taiwanensis group: the Amami lineage diverged first, then Yaeyama, and finally the Taiwanese lineages. Divergence time estimation and population demographic change analyses indicate that Pleistocene climate fluctuations minimally impacted the genetic structure of these spiders. Instead, estimated divergence events correspond to Miocene-Pliocene geological events, strongly supporting a much older timeframe for diversification. The results of species delimitation analyses coincide well with morphological differences observed among the island populations, reinforcing inferred species boundaries, and at least three potential cryptic species were statistically detected within Taiwan. Main conclusions: Miocene-Pliocene geological events appear to have contributed disproportionately to diversification in the M. taiwanensis species group. The clear association between geographical area, genetic structure and statistical species delimitation strongly supports an interpretation of allopatric speciation. We advocate comparing our results with those derived from additional study organisms with similar life histories to further explore the Miocene-Pliocene diversification hypothesis.",
keywords = "Allopatric speciation, Continental islands, Cryptic species, Endemism, Macrothele, Phylogeography, Species delimitation",
author = "Su, {Yong Chao} and Brown, {Rafe M.} and Chang, {Yung Hau} and Lin, {Chung Ping} and Tso, {I. Min}",
year = "2016",
month = "5",
day = "1",
doi = "10.1111/jbi.12674",
language = "English",
volume = "43",
pages = "991--1003",
journal = "Journal of Biogeography",
issn = "0305-0270",
publisher = "Wiley-Blackwell",
number = "5",

}

TY - JOUR

T1 - Did a Miocene-Pliocene island isolation sequence structure diversification of funnel web spiders in the Taiwan-Ryukyu Archipelago?

AU - Su, Yong Chao

AU - Brown, Rafe M.

AU - Chang, Yung Hau

AU - Lin, Chung Ping

AU - Tso, I. Min

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Aim: We tested the competing hypotheses concerning the relative importance of Pleistocene versus Miocene-Pliocene geological events for the formation of endemism in an Asian archipelago using the Macrothele taiwanensis (Hexathelidae) species group. Location: Taiwan-Ryukyu Archipelago. Methods: We estimated phylogenetic trees from cytochrome oxidase I subunit (COI) and 16S rRNA (16S) gene regions and employed Bayesian ancestral range reconstructions to investigate previously debated models of lineage diversification in the Taiwan-Ryukyu Archipelago. To evaluate alternative geological timeframes for their importance in shaping the genetic structure of funnel web spiders, we used five time calibration schemes to estimate timing of divergence, infer ancestral distributions, and to reconstruct historical demographic changes in each lineage. We tested taxonomic boundaries with two species delimitation procedures. Results: Our results indicate a north-to-south isolation sequence of the M. taiwanensis group: the Amami lineage diverged first, then Yaeyama, and finally the Taiwanese lineages. Divergence time estimation and population demographic change analyses indicate that Pleistocene climate fluctuations minimally impacted the genetic structure of these spiders. Instead, estimated divergence events correspond to Miocene-Pliocene geological events, strongly supporting a much older timeframe for diversification. The results of species delimitation analyses coincide well with morphological differences observed among the island populations, reinforcing inferred species boundaries, and at least three potential cryptic species were statistically detected within Taiwan. Main conclusions: Miocene-Pliocene geological events appear to have contributed disproportionately to diversification in the M. taiwanensis species group. The clear association between geographical area, genetic structure and statistical species delimitation strongly supports an interpretation of allopatric speciation. We advocate comparing our results with those derived from additional study organisms with similar life histories to further explore the Miocene-Pliocene diversification hypothesis.

AB - Aim: We tested the competing hypotheses concerning the relative importance of Pleistocene versus Miocene-Pliocene geological events for the formation of endemism in an Asian archipelago using the Macrothele taiwanensis (Hexathelidae) species group. Location: Taiwan-Ryukyu Archipelago. Methods: We estimated phylogenetic trees from cytochrome oxidase I subunit (COI) and 16S rRNA (16S) gene regions and employed Bayesian ancestral range reconstructions to investigate previously debated models of lineage diversification in the Taiwan-Ryukyu Archipelago. To evaluate alternative geological timeframes for their importance in shaping the genetic structure of funnel web spiders, we used five time calibration schemes to estimate timing of divergence, infer ancestral distributions, and to reconstruct historical demographic changes in each lineage. We tested taxonomic boundaries with two species delimitation procedures. Results: Our results indicate a north-to-south isolation sequence of the M. taiwanensis group: the Amami lineage diverged first, then Yaeyama, and finally the Taiwanese lineages. Divergence time estimation and population demographic change analyses indicate that Pleistocene climate fluctuations minimally impacted the genetic structure of these spiders. Instead, estimated divergence events correspond to Miocene-Pliocene geological events, strongly supporting a much older timeframe for diversification. The results of species delimitation analyses coincide well with morphological differences observed among the island populations, reinforcing inferred species boundaries, and at least three potential cryptic species were statistically detected within Taiwan. Main conclusions: Miocene-Pliocene geological events appear to have contributed disproportionately to diversification in the M. taiwanensis species group. The clear association between geographical area, genetic structure and statistical species delimitation strongly supports an interpretation of allopatric speciation. We advocate comparing our results with those derived from additional study organisms with similar life histories to further explore the Miocene-Pliocene diversification hypothesis.

KW - Allopatric speciation

KW - Continental islands

KW - Cryptic species

KW - Endemism

KW - Macrothele

KW - Phylogeography

KW - Species delimitation

UR - http://www.scopus.com/inward/record.url?scp=84953807516&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84953807516&partnerID=8YFLogxK

U2 - 10.1111/jbi.12674

DO - 10.1111/jbi.12674

M3 - Article

AN - SCOPUS:84953807516

VL - 43

SP - 991

EP - 1003

JO - Journal of Biogeography

JF - Journal of Biogeography

SN - 0305-0270

IS - 5

ER -