Crossing the impassable: genetic connections in 20 reef fishes across the eastern Pacific barrier

The ‘impassable’ Eastern Pacific Barrier (EPB), ca 5000 km of deep water separating the eastern from the central Pacific, is the World's widest marine biogeographic barrier. Sequencing of mitochondrial DNA in 20 reef fish morphospecies encountered on both sides of the barrier revealed cryptic speciation in two. Among the other 18 species only two showed significant differentiation (as revealed by haplotype networks and F ST statistics) between the eastern and the central Pacific. Coalescence analyses indicated that genetic similarity in the 18 truly transpacific species resulted from different combinations of ages of most recent invasion and of levels of recurrent gene flow, with estimated times of initial separation ranging from approximately 30 000 to 1 Myr (ago). There is no suggestion of simultaneous interruptions of gene flow among the species. Migration across the EPB was previously thought to be exclusively eastward, but our evidence showed two invasions from east to west and eight cases in which subsequent gene flow possibly proceeded in the same direction. Thus, the EPB is sporadically permeable to propagules originating on either side.

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Intraspecific variability in the life histories of endemic coral-reef fishes between photic and mesophotic depths across the Central Pacific Ocean

Coral Reefs ◽

10.1007/s00338-017-1559-8 ◽

2017 ◽

Vol 36 (2) ◽

pp. 663-674 ◽

Cited By ~ 4

Author(s):

M. S. Winston ◽

B. M. Taylor ◽

E. C. Franklin

Keyword(s):

Coral Reef ◽

Pacific Ocean ◽

Life Histories ◽

Intraspecific Variability ◽

Reef Fishes ◽

Coral Reef Fishes ◽

Central Pacific ◽

Central Pacific Ocean

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The relationship between the El Niño Southern Oscillation and Australian monsoon rainfall on decadal time-scales

10.5194/egusphere-egu21-10482 ◽

2021 ◽

Author(s):

Hanna Heidemann ◽

Joachim Ribbe ◽

Benjamin J. Henley ◽

Tim Cowan ◽

Christa Pudmenzky ◽

...

Keyword(s):

Monsoon Rainfall ◽

Decadal Variability ◽

Southern Oscillation ◽

Eastern Pacific ◽

Central Pacific ◽

Australian Monsoon ◽

Enso Events ◽

Pacific Decadal Variability ◽

Prediction Systems ◽

Different Response

<p>This research analyses the observed relationship between eastern and central Pacific El Ni&#241;o Southern Oscillation (ENSO) events and Australian monsoon rainfall (AUMR) on a decadal timescale during the December to March monsoon months. To assess the decadal influence of the different flavours of ENSO on the AUMR, we focus on the phases of the Interdecadal Pacific Oscillation (IPO) over the period 1920 to 2020. &#160;The AUMR is characterized by substantial decadal variability, which appears to be linked to the positive and negative phases of the IPO. During the past two historical negative IPO phases, significant correlations have been observed between central Pacific sea surface temperature (SST) anomalies and AUMR over both the northeast and northwest of Australia. This central Pacific SST-AUMR relationship has strengthened from the first negative IPO phase (mid-1940s to the mid-1970s) to the second (late 1990s to mid-2010s), while the eastern Pacific SST-AUMR influence has weakened. Composite rainfall anomalies over Australia reveal a different response of AUMR to central Pacific El Ni&#241;o/La Ni&#241;a and eastern Pacific La Ni&#241;a events during positive IPO and negative IPO phases. This research clearly shows that ENSO's influence on AUMR is modulated by Pacific decadal variability, however this teleconnection, in itself, can change between similar decadal Pacific states.&#160; Going forward, as decadal prediction systems improve and become more mainstream, the IPO phase could be used as a potential source for decadal predictability of the tendency of AUMR. &#160;</p>

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Short-term temporal patterns of early recruitment of coral reef fishes in the tropical eastern Pacific

Marine Biology ◽

10.1007/s00227-002-0948-9 ◽

2003 ◽

Vol 142 (2) ◽

pp. 399-409 ◽

Cited By ~ 7

Author(s):

S. Lozano ◽

F. Zapata

Keyword(s):

Coral Reef ◽

Temporal Patterns ◽

Reef Fishes ◽

Coral Reef Fishes ◽

Eastern Pacific ◽

Tropical Eastern Pacific ◽

Short Term ◽

Early Recruitment

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Inferring gene flow in coral reef fishes from different molecular markers: which loci to trust?

Heredity ◽

10.1038/sj.hdy.6801005 ◽

2007 ◽

Vol 99 (3) ◽

pp. 331-339 ◽

Cited By ~ 11

Author(s):

C Fauvelot ◽

C Lemaire ◽

S Planes ◽

F Bonhomme

Keyword(s):

Molecular Markers ◽

Gene Flow ◽

Coral Reef ◽

Reef Fishes ◽

Coral Reef Fishes

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Correction to ‘Speciation over the edge: gene flow among non-human primate species across a formidable biogeographic barrier’

Royal Society Open Science ◽

10.1098/rsos.180736 ◽

2018 ◽

Vol 5 (6) ◽

pp. 180736

Author(s):

Ben J. Evans ◽

Anthony J. Tosi ◽

Kai Zeng ◽

Jonathan Dushoff ◽

André Corvelo ◽

...

Keyword(s):

Gene Flow ◽

Primate Species ◽

Biogeographic Barrier ◽

Human Primate

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A study of the effects of westerly wind bursts on ENSO based on CESM

Climate Dynamics ◽

10.1007/s00382-019-05034-2 ◽

2019 ◽

Vol 54 (1-2) ◽

pp. 885-899 ◽

Cited By ~ 2

Author(s):

Xiaoxiao Tan ◽

Youmin Tang ◽

Tao Lian ◽

Zhixiong Yao ◽

Xiaojing Li ◽

...

Keyword(s):

El Niño ◽

El Nino ◽

Eastern Pacific ◽

Parameterization Scheme ◽

Westerly Wind ◽

Central Pacific ◽

El Niño Events ◽

Wind Bursts ◽

Westerly Wind Bursts ◽

El Nino Events

AbstractNumerous works have indicated that westerly wind bursts (WWBs) have a significant contribution to the development of El Niño events. However, the simulation of WWBs commonly suffers from large biases in the current generation of coupled general circulation models (CGCMs), limiting our ability to predict El Niño events. In this study, we introduce a WWBs parameterization scheme into the global coupled Community Earth System Model (CESM) to improve the representation of WWBs and to study the impacts of WWBs on El Niño-Southern Oscillation (ENSO) characteristics. It is found that CESM with the WWBs parameterization scheme can generate more realistic characteristics of WWBs, in particular their location and seasonal variation of occurrence. With the parameterized WWBs, the skewness of the Niño 3 index is increased, in better agreement with observation. Eastern Pacific El Niño and central Pacific El Niño events could be successfully reproduced in the model run with WWBs parameterization. Further diagnoses show that the enhanced horizontal advection in the central Pacific and vertical advection in the eastern Pacific, both of which are triggered by WWBs, are crucial factors responsible for the improvements in ENSO simulation. Clearly, WWBs have important effects on ENSO asymmetry and ENSO diversity.

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