Neogene sedimentary evolution of Baja California in relation to regional tectonics

Helenes, Javier; Carreño, Ana Luisa

doi:10.1016/s0895-9811(99)00042-5

Cited by 49 publications

(48 citation statements)

References 38 publications

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“…In contrast to the Pleistocene estimates from terrestrial animals, the geological evidence shows an earlier (mid-Miocene to late Pliocene) date for the seaway (Smith 1991;Helenes and Carreñ o 1999;Murphy and Aguirre-Léon 2002).…”

Section: Historical Vicariancementioning

confidence: 73%

Cryptic Vicariance in Gulf of California Fishes Parallels Vicariant Patterns Found in Baja California Mammals and Reptiles

Riginos¹

2005

Evol

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Comparisons across multiple taxa can often clarify the histories of biogeographic regions. In particular, historic barriers to movement should have affected multiple species and, thus, result in a pattern of concordant intraspecific genetic divisions among species. A striking example of such comparative phylogeography is the recent observation that populations of many small mammals and reptiles living on the Baja California peninsula have a large genetic break between northern and southern peninsular populations. In the present study, I demonstrate that five species of near-shore fishes living on the Baja coastline of the Gulf of California share this genetic pattern. The simplest explanation for this concordant genetic division within both terrestrial and marine vertebrates is that the Baja Peninsula was fragmented by a Plio-Pleistocene marine seaway and that this seaway posed a substantial barrier to movement for near-shore fishes. For some fish species, the signal of this vicariance in mtDNA has been eroded by gene flow and is not evident with classic, equilibrium measures of population structure. Yet, significant divisions are apparent in coalescent analyses that jointly estimate divergence with gene flow. The genetic divisions within Gulf of California fishes also coincide with recognized biogeographic regions based on fish community composition and several environmental factors. It is likely that adaptation to regional environments and present-day oceanographic circulation limit gene exchange between biogeographic regions and help maintain evidence of past vicariance.

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Section: Historical Vicariancementioning

confidence: 73%

Cryptic Vicariance in Gulf of California Fishes Parallels Vicariant Patterns Found in Baja California Mammals and Reptiles

Riginos¹

2005

Evol

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“…The first stage involves the presence of a northern proto-Gulf basin, which occupied the northern portion of today's Gulf and an extensive area to the north [90], and is estimated to have existed at least 11.61 Ma [16]. A Late Miocene seaway that connected the Pacific with the proto-Gulf basin through the central part of Baja has been proposed [17], [91], [92]. During the second stage, the Gulf of California-Baja Peninsula region attained its present form [89].…”

Section: Discussionmentioning

confidence: 99%

Contrasting Phylogeography of Sandy vs. Rocky Supralittoral Isopods in the Megadiverse and Geologically Dynamic Gulf of California and Adjacent Areas

2013

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Phylogeographic studies of animals with low vagility and restricted to patchy habitats of the supralittoral zone, can uncover unknown diversity and shed light on processes that shaped evolution along a continent’s edge. The Pacific coast between southern California and central Mexico, including the megadiverse Gulf of California, offers a remarkable setting to study biological diversification in the supralittoral. A complex geological history coupled with cyclical fluctuations in temperature and sea level provided ample opportunities for diversification of supralittoral organisms. Indeed, a previous phylogeographic study of Ligia, a supralittoral isopod that has limited dispersal abilities and is restricted to rocky patches, revealed high levels of morphologically cryptic diversity. Herein, we examined phylogeographic patterns of Tylos, another supralittoral isopod with limited dispersal potential, but whose habitat (i.e., sandy shores) appears to be more extensive and connected than that of Ligia. We conducted Maximum Likelihood and Bayesian phylogenetic analyses on mitochondrial and nuclear DNA sequences. These analyses revealed multiple highly divergent lineages with discrete regional distributions, despite the recognition of a single valid species for this region. A traditional species-diagnostic morphological trait distinguished several of these lineages. The phylogeographic patterns of Tylos inside the Gulf of California show a deep and complex history. In contrast, patterns along the Pacific region between southern California and the Baja Peninsula indicate a recent range expansion, probably postglacial and related to changes in sea surface temperature (SST). In general, the phylogeographic patterns of Tylos differed from those of Ligia. Differences in the extension and connectivity of the habitats occupied by Tylos and Ligia may account for the different degrees of population isolation experienced by these two isopods and their contrasting phylogeographic patterns. Identification of divergent lineages of Tylos in the study area is important for conservation, as some populations are threatened by human activities.

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“…About 6 Ma, the Pacific-North America Plate boundary shifted ∼250 km inland to its current location in the Gulf of California, roughly parallel to the coastline (Oskin et al 2001) and marine sediments were widely deposited in the Gulf (Helenes & Carreño 1999;Miller & Lizarralde 2013).…”

Section: G E O L O G I C a L S E T T I N Gmentioning

confidence: 99%

Seismic structure beneath the Gulf of California: a contribution from group velocity measurements

Luccio

Persaud

Clayton

2014

Geophysical Journal International

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Neogene sedimentary evolution of Baja California in relation to regional tectonics

Cited by 49 publications

References 38 publications

Cryptic Vicariance in Gulf of California Fishes Parallels Vicariant Patterns Found in Baja California Mammals and Reptiles

Cryptic Vicariance in Gulf of California Fishes Parallels Vicariant Patterns Found in Baja California Mammals and Reptiles

Contrasting Phylogeography of Sandy vs. Rocky Supralittoral Isopods in the Megadiverse and Geologically Dynamic Gulf of California and Adjacent Areas

Seismic structure beneath the Gulf of California: a contribution from group velocity measurements

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