Seasonal distribution of genetic types of planktonic foraminifer morphospecies in the Santa Barbara Channel and its paleoceanographic implications

Darling, Kate; Kučera, Michal; Wade, Christopher M.; Langen, P. von; Pak, Dorothy K.

doi:10.1029/2001pa000723

Cited by 90 publications

(105 citation statements)

References 31 publications

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“…Branch lengths suggest that this divergence is relatively early when compared with the divergences of the other Type II genotypes. The later divergences may be associated with Quaternary climate cyclicity (20) and are consistent with the Quaternary divergences observed in N. pachyderma (1).…”

Section: Biogeography Of Arctic Subpolar and Polar N Pachyderma Genosupporting

confidence: 72%

“…1. A single genotype (Type IIe, n ϭ 124) of this subpolar species was identified and was found to be highly distinct from all other genotypes of this species known to date (19)(20). No other G. bulloides genotypes were found in the North Pacific subpolar gyre during our collection in the northern summer of 2002.…”

Section: Biogeography Of Arctic Subpolar and Polar N Pachyderma Genomentioning

confidence: 87%

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Global molecular phylogeography reveals persistent Arctic circumpolar isolation in a marine planktonic protist

Darling

Kučera

Wade

2007

Proc. Natl. Acad. Sci. U.S.A.

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126

100

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The high-latitude planktonic foraminifera have proved to be particularly useful model organisms for the study of global patterns of vicariance and gene flow in the oceans. Such studies demonstrate that gene flow can occur over enormous distances in the pelagic marine environment leading to cosmopolitanism but also that there are ecological and geographical barriers to gene flow producing biogeographic structure. Here, we have undertaken a comprehensive global study of genetic diversity within a marine protist species, the high-latitude planktonic foraminiferan Neogloboquadrina pachyderma. We present extensive new data sets from the North Pacific and Arctic Oceans that, in combination with our earlier data from the North Atlantic and Southern Oceans, allow us to determine the global phylogeography of this species. The new genetic data reveal a pattern of Arctic circumpolar isolation and bipolar asymmetry between the Atlantic and Pacific Oceans. We show that the ancestry of North Pacific N. pachyderma is relatively recent. It lies within the upwelling systems and subpolar waters of the Southern Hemisphere and remarkably not within the neighboring Arctic Ocean. Instead, the Arctic Ocean population forms a genetic continuum with the North Atlantic population, which became isolated from the southern populations much earlier, after the onset of Northern hemisphere glaciation. Data from the planktonic foraminiferal morphospecies Globigerina bulloides is also introduced to highlight the isolation and endemism found within the subpolar North Pacific gyre. These data provide perspective for interpretation and discussion of global gene flow and speciation patterns in the plankton.global biogeography ͉ Globigerina bulloides ͉ Neogloboquadrina pachyderma ͉ planktonic foraminifera

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Section: Biogeography Of Arctic Subpolar and Polar N Pachyderma Genosupporting

confidence: 72%

Section: Biogeography Of Arctic Subpolar and Polar N Pachyderma Genomentioning

confidence: 87%

Global molecular phylogeography reveals persistent Arctic circumpolar isolation in a marine planktonic protist

Darling

Kučera

Wade

2007

Proc. Natl. Acad. Sci. U.S.A.

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126

100

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“…), and does not show a unimodal distribution when flux is plotted versus temperature (Zarić et al, 2005). G. bulloides comprises at least six different genetic types and exhibits a polymodal distribution pattern (Darling et al, 1999(Darling et al, , 2000Stewart et al, 2001;Kucera and Darling, 2002;Darling et al, 2003). Zarić et al (2005) showed that in the tropical Indian Ocean, G. bulloides is present at higher temperatures than in the Atlantic and Pacific Ocean.…”

Section: Growth (Tg)mentioning

confidence: 99%

“…), G. bulloides typically occurs in subpolar and transitional water masses (Bradshaw, 1959;Tolderlund and Bé, 1971;Bé, 1977), and is also found in upwelling areas (Duplessy et al, 1981;Thunell and Reynolds, 1984;Hemleben et al, 1989). Temperature does not seem to be a controlling factor in the distribution of this species, although the exact relationship between environmental parameters and geographical distribution of G. bulloides may be masked by the fact that this species group comprises several distinct genotypes (Darling et al, 1999(Darling et al, , 2000Stewart et al, 2001;Kucera and Darling, 2002;Darling et al, 2003). Generally, the abundance of G. bulloides is related to high productivity areas (Prell and Curry, 1981;Bé et al, 1985;Hemleben et al, 1989;Giraudeau, 1993;Watkins and Mix, 1998;Zarić et al, 2005).…”

Section: Spatial Distribution Patternsmentioning

confidence: 99%

Predicting the global distribution of planktonic foraminifera using a dynamic ecosystem model

et al. 2008

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Abstract. We present a new planktonic foraminifera model developed for the global ocean mixed-layer. The main purpose of the model is to explore the response of planktonic foraminifera to different boundary conditions in the geological past, and to quantify the seasonal bias in foraminiferabased paleoceanographic proxy records. This model is forced with hydrographic data and with biological information taken from an ecosystem model to predict monthly concentrations of the most common planktonic foraminifera species used in paleoceanography: N. pachyderma (sinistral and dextral varieties), G. bulloides, G. ruber (white variety) and G. sacculifer. The sensitivity of each species with respect to temperature (optimal temperature and range of tolerance) is derived from previous sediment-trap studies.Overall, the spatial distribution patterns of most of the species are in agreement with core-top data. N. pachyderma (sin.) is limited to polar regions, N. pachyderma (dex.) and G. bulloides are the most common species in high productivity zones, while G. ruber and G. sacculifer are more abundant in tropical and subtropical oligotrophic waters. For N. pachyderma (sin) and N. pachyderma (dex.), the season of maximum production coincides with that observed in sediment-trap records. Model and sediment-trap data for G. ruber and G. sacculifer show, in general, lower concentrations and less seasonal variability at all sites. A sensitivity experiment suggest that, within the temperature-tolerance range of a species, food availability may be the main parameter controlling its abundance.

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“…North Pacific and North Atlantic morphospecies of N. pachyderma sin. represent genetically different cryptospecies [Darling et al, 2003;Kucera and Darling, 2002;Darling et al, 2006]. The North Pacific variety is a subpolar cryptospecies and represents warmer temperatures than its polar counterpart in the North Atlantic [Darling et al, 2006].…”

Section: Sea Surface Temperature and Sea Surface Salinitymentioning

confidence: 99%

Paleonutrient and productivity records from the subarctic North Pacific for Pleistocene glacial terminations I to V

Gebhardt¹,

Sarnthein²,

et al. 2008

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[1] Our study addresses fundamental questions of the mode and timing of orbital and millennial-scale changes in the meridional overturning circulation (MOC) of the subarctic North Pacific. Particular concerns are the vertical mixing, the present and past abundance of nutrients in surface waters despite strong stratification, and the North Pacific-North Atlantic seesaw of oscillations in sea surface temperature (SST). We do this by generating and interpreting multiple records for glacial terminations I-V down two long piston cores, one each from the western and eastern subarctic Pacific. Chlorins and biogenic opal are proxies for surface water productivity; d 13 C of epibenthic foraminifera is a record of deepwater ventilation; and the d 13 C of N. pachyderma sin. is a tracer of nutrients in subsurface waters that extend up to the sea surface during times of vertical mixing. The degree of mixing is traced by pairing SST and d 18 O records of planktic surface and subsurface (pycnocline) dwellers. Tight age control is deduced from a suite of age-calibrated 14 C plateau boundaries for Termination I and benthic d 18 O and geomagnetic events for the last 800 ka. Carbon 14 paleoreservoir ages record the ages of surface and deep waters to uncover short-term changes in MOC over Termination I. We have defined a standard sequence of short-term productivity events for Termination I, also evident during terminations II to V and subsequent interglacials over the last 450 ka. The peak glacial regime of stable stratification and low productivity terminated, together with the end of ice rafting and melting, near 17 ka, $2000 years after the onset of Termination I. Pulses of vertical mixing and incursion of warm surface waters from the subtropics followed. Convected young water masses finally penetrated down to 3600-m water depth at 17.0 to less than 14.5 ka, significantly improving bottom water ventilation through the late deglacial and earliest interglacial. Mixing with upwelled nutrients from the pycnocline induced short-term maxima in algal production of chlorins and biogenic opal near 17-15 and 15-12 ka, respectively. Deglacial meltwater incursions in the Aleutian Current and silica input from North American rivers also promoted East Pacific productivity after 15.5 ka. Productivity decreased during the late deglacial and early interglacial, coeval with an exceptional peak in CaCO 3 preservation caused by both low organic flux and well-ventilated deepwater. Subsequently, low salinity and cool surface waters and in turn, stratification were gradually restored. A second, opaldominated productivity maximum marked the ends of interglacials. The deglacial pulses of vertical mixing around 17-11 ka imply an important contribution of the North Pacific to the coeval release of oceanic CO 2 into the atmosphere and support the east-west seesaw model of climate change.Citation: Gebhardt, H., M. Sarnthein, P. M. Grootes, T. Kiefer, H. Kuehn, F. Schmieder, and U. Röhl (2008), Paleonutrient and productivity records from the subarctic North ...

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Seasonal distribution of genetic types of planktonic foraminifer morphospecies in the Santa Barbara Channel and its paleoceanographic implications

Cited by 90 publications

References 31 publications

Global molecular phylogeography reveals persistent Arctic circumpolar isolation in a marine planktonic protist

Global molecular phylogeography reveals persistent Arctic circumpolar isolation in a marine planktonic protist

Predicting the global distribution of planktonic foraminifera using a dynamic ecosystem model

Paleonutrient and productivity records from the subarctic North Pacific for Pleistocene glacial terminations I to V

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