An archaeomalacological investigation of chitons on the Hane Dune site, Ua Huka, Marquesas Islands

2021 ◽  
pp. 1-23
Author(s):  
Gabrielle Traversat ◽  
Guillaume Molle ◽  
Eric Conte ◽  
Bernard Salvat
Keyword(s):  
Marquesas Islands

scholarly journals Evidence for efficient regenerated production and dinitrogen fixation in nitrogen-deficient waters of the South Pacific Ocean: impact on new and export production estimates

2008 ◽  
Vol 5 (2) ◽  
pp. 323-338 ◽  
Author(s):  
P. Raimbault ◽  
N. Garcia
Keyword(s):  
Pacific Ocean ◽  
Nitrogen Uptake ◽  
N2 Fixation ◽  
Inorganic Nitrogen ◽  
South Pacific ◽  
Dinitrogen Fixation ◽  
The South ◽  
New Production ◽  
Marquesas Islands ◽  
South Pacific Ocean

Abstract. One of the major objectives of the BIOSOPE cruise, carried out on the R/V Atalante from October-November 2004 in the South Pacific Ocean, was to establish productivity rates along a zonal section traversing the oligotrophic South Pacific Gyre (SPG). These results were then compared to measurements obtained from the nutrient – replete waters in the Chilean upwelling and around the Marquesas Islands. A dual 13C/15N isotope technique was used to estimate the carbon fixation rates, inorganic nitrogen uptake (including dinitrogen fixation), ammonium (NH4) and nitrate (NO3) regeneration and release of dissolved organic nitrogen (DON). The SPG exhibited the lowest primary production rates (0.15 g C m−2 d−1), while rates were 7 to 20 times higher around the Marquesas Islands and in the Chilean upwelling, respectively. In the very low productive area of the SPG, most of the primary production was sustained by active regeneration processes that fuelled up to 95% of the biological nitrogen demand. Nitrification was active in the surface layer and often balanced the biological demand for nitrate, especially in the SPG. The percentage of nitrogen released as DON represented a large proportion of the inorganic nitrogen uptake (13–15% in average), reaching 26–41% in the SPG, where DON production played a major role in nitrogen cycling. Dinitrogen fixation was detectable over the whole study area; even in the Chilean upwelling, where rates as high as 3 nmoles l−1 d−1 were measured. In these nutrient-replete waters new production was very high (0.69±0.49 g C m−2 d−1) and essentially sustained by nitrate levels. In the SPG, dinitrogen fixation, although occurring at much lower daily rates (≈1–2 nmoles l−1 d−1), sustained up to 100% of the new production (0.008±0.007 g C m−2 d−1) which was two orders of magnitude lower than that measured in the upwelling. The annual N2-fixation of the South Pacific is estimated to 21×1012g, of which 1.34×1012g is for the SPG only. Even if our "snapshot" estimates of N2-fixation rates were lower than that expected from a recent ocean circulation model, these data confirm that the N-deficiency South Pacific Ocean would provide an ideal ecological niche for the proliferation of N2-fixers which are not yet identified.

scholarly journals A new variety of Habenaria (Orchidaceae, Habenariinae) from French Polynesia

2010 ◽  
Vol 19 (1) ◽  
pp. 11-14
Author(s):  
Hanna Margońska
Keyword(s):  
French Polynesia ◽  
New Variety ◽  
Marquesas Islands

A new variety of Habenaria (Orchidaceae, Habenariinae) from French Polynesia A new variety of Habenaria tahitensis (Orchidaceae, Habenariinae) from Tahiti and the Marquesas Islands (French Polynesia) is described, illustrated and compared to its closest relatives.

Seismic imaging of hotspot-related crustal underplating beneath the Marquesas Islands

Nature ◽  
1995 ◽  
Vol 373 (6515) ◽  
pp. 600-603 ◽  
Author(s):  
David W. Caress ◽  
Marcia K. McNutt ◽  
Robert S. Detrick ◽  
John C. Mutter
Keyword(s):  
Seismic Imaging ◽  
Marquesas Islands

Tiracola plagiata. [Distribution map].

1972 ◽  
Author(s):  
Keyword(s):  
Sri Lanka ◽  
Geographical Distribution ◽  
Host Plants ◽  
Pacific Islands ◽  
Banana Fruit ◽  
Distribution Map ◽  
Irian Jaya ◽  
Society Islands ◽  
Marquesas Islands ◽  
New Distribution

Abstract A new distribution map is provided for Tiracola plagiata (Wlk.) (Lep., Noctuidae) (Cacao Armyworm, Banana Fruit-eating Caterpillar). Host Plants: Banana, cacao, cassava, castor, Citrus, coffee, rubber, tea, tobacco. Information is given on the geographical distribution in ASIA, Cambodia, China, India, Indonesia, Laos, Malaysia, Philippines, Sikkim, Singapore, Sri Lanka, Taiwan, Thailand, Vietnam (North), AUSTRALASIA and PACIFIC ISLANDS, Australia, Cook Islands, Marquesas Islands, Papua and New Guinea, Samoa, Society Islands, Tonga, Irian Jaya.

Anomis flava. [Distribution map].

1978 ◽  
Author(s):  
Keyword(s):  
Pacific Islands ◽  
New Caledonia ◽  
Solomon Islands ◽  
Distribution Map ◽  
Irian Jaya ◽  
Society Islands ◽  
Marquesas Islands ◽  
New Hebrides ◽  
New Distribution ◽  
Upper Volta

Abstract A new distribution map is provided for Anomis flava (F.) (Cosmophila flava[Anomis flava] F., C. indica Guer.) (Lep., Noctuidae) (Cotton semi-looper). Host Plants: Cotton, okra, Abutilon, tomato. Information is given on the geographical distribution in ASIA, Burma, Cambodia, China, Hongkong, India, Indonesia, Japan, Korea, South Laos, Malaysia, Pakistan, Philippines, Sikkim, Sri Lanka, Taiwan, Thailand, Vietnam, North AFRICA, Angola, Benin, Cameroun, Chad, Ethiopia, Gambia, Ghana, Ivory Coast, Kenya, Madagascar, Malawi, Mali, Mauritius, Niger, Nigeria, Rhodesia, Senegal, Somalia, Sudan, Tanzania, Togo, Uganda, Upper Volta, Zaire, Zambia, AUSTRALASIA and PACIFIC ISLANDS, Australia, Cook Islands, Fiji, Marianas Islands, Marquesas Islands, New Caledonia, New Hebrides, Papua New Guinea, Samoa, Society Islands, Solomon Islands, Tonga, Irian Jaya.

scholarly journals Redescription and generic placement of Neopamera mumfordi (Van Duzee, 1935) and Remaudiereana castanea (Van Duzee, 1935) (Hemiptera: Heteroptera: Lygaeoidea: Rhyparochromidae)

Zootaxa ◽  
2012 ◽  
Vol 3430 (1) ◽  
pp. 61
Author(s):  
PABLO M. DELLAPÉ ◽  
M. B. MALIPATIL
Keyword(s):  
New Genus ◽  
Marquesas Islands

A new genus, Neocnemodus gen. nov., is erected to accommodate Neopamera mumfordi (Van Duzee) from the Marquesas Islands; the species is redescribed and illustrated, and its relationships with the genera Cnemodus Herrich-Schaeffer and Andercnemodus Brailovsky & Cervantes-Peredo are analysed. Another Marquesas Island myodochine species, Remaudiereana castanea (Van Duzee), is redescribed, illustrated, and its generic placement discussed.

scholarly journals Volume distribution for particles between 3.5 to 2000 μm in the upper 200 m region of the South Pacific Gyre

2008 ◽  
Vol 5 (2) ◽  
pp. 299-310 ◽  
Author(s):  
L. Stemmann ◽  
D. Eloire ◽  
A. Sciandra ◽  
G. A. Jackson ◽  
L. Guidi ◽  
...  
Keyword(s):  
Weight Ratio ◽  
South Pacific ◽  
Dry Weight ◽  
Volume Distribution ◽  
The South ◽  
Size Spectra ◽  
Marquesas Islands ◽  
Large Particles ◽  
Living Organisms ◽  
South Pacific Gyre

Abstract. The French JGOFS BIOSOPE cruise crossed the South Pacific Gyre (SPG) on a transect between the Marquesas Islands and the Chilean coast on a 7500 km transect (8° S–34° S and 8° W–72° W). The number and volume distributions of small (3.5100 μm) were analysed combining two instruments, the HIAC/Royco Counter (for the small particles) and the Underwater Video Profiler (UVP, for the large particles). For the HIAC analysis, samples were collected from 12 L CTD Rosette bottles and immediately analysed on board while the UVP provided an estimate of in situ particle concentrations and size in a continuous profile. Out of 76 continuous UVP and 117 discrete HIAC vertical profiles, 25 had both sets of measurements, mostly at a site close to the Marquesas Islands (site MAR) and one in the center of the gyre (site GYR). At GYR, the particle number spectra from few μm to few mm were fit with power relationships having slopes close to −4. At MAR, the high abundance of large objects, probably living organisms, created a shift in the full size spectra of particles such that a single slope was not appropriate. The small particle pool at both sites showed a diel pattern while the large did not, implying that the movement of mass toward the large particles does not take place at daily scale in the SPG area. Despite the relatively simple nature of the number spectra, the volume spectra were more variable because what were small deviations from the straight line in a log-log plot were large variations in the volume estimates. In addition, the mass estimates from the size spectra are very sensitive to crucial parameters such as the fractal dimension and the POC/Dry Weight ratio. Using consistent values for these parameters, we show that the volume of large particles can equal the volume of the smaller particles. However the proportion of material in large particles decreased from the mesotrophic conditions at the border of the SPG to the ultra-oligotrophy of the center in the upper 200 m depth. We expect large particles to play a major role in the trophic interaction in the upper waters of the South Pacific Gyre.

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