Organic Cu-complexation at the shallow marine hydrothermal vent fields off the coast of Milos (Greece), Dominica (Lesser Antilles) and the Bay of Plenty (New Zealand)

2015 ◽  
Vol 173 ◽  
pp. 244-252 ◽  
Author(s):  
Charlotte Kleint ◽  
Stefan Kuzmanovski ◽  
Zach Powell ◽  
Solveig I. Bühring ◽  
Sylvia G. Sander ◽  
...  
Keyword(s):  
New Zealand ◽  
Hydrothermal Vent ◽  
Lesser Antilles ◽  
Shallow Marine

scholarly journals Fossil and modern sponge fauna of southern Australia and adjacent regions compared: interpretation, evolutionary and biogeographic significance of the late Eocene ‘soft’ sponges

2016 ◽  
Vol 85 (1) ◽  
pp. 13-35 ◽  
Author(s):  
Magdalena Łukowiak
Keyword(s):  
New Zealand ◽  
Shallow Water ◽  
Environmental Context ◽  
Late Eocene ◽  
Shallow Marine ◽  
Marine Communities ◽  
Shallow Water Species ◽  
Water Species

The late Eocene ‘soft’ sponge fauna of southern Australia is reconstructed based on disassociated spicules and is used to interpret the paleoecology and environmental context of shallow marine communities in this region. The reconstructed sponge association was compared with coeval sponge assemblages from the Oamaru Diatomite, New Zealand, and with the modern ‘soft’ sponge fauna of southern coastal of Australia. Based on the predominance of shallow- and moderately shallow-water species, the late Eocene assemblage is interpreted to have inhabited waters depths of about 100 m. This contrast with the spicule assemblage from New Zealand, which characterized deeper waters based on the presence of numerous strictly deepwater sponge taxa, and the absence of spicules of shallow-water demosponges represented in the Australian material. The southern Australian Eocene sponge assemblages have clear Tethyan affinities evidenced by the occurrence of sponges known today from diverse regions. This distribution suggests much wider geographical ranges of some sponge taxa during the Eocene. Their present distributions may be relictual. The modern sponge fauna inhabiting southern Australian waters shows only moderate differences from these of the late Eocene. Differences are more pronounced at lower taxonomic levels (family and genus).

Redox speciation of chromium in the oceanic water column of the Lesser Antilles and offshore Otago Peninsula, New Zealand

2003 ◽  
Vol 54 (6) ◽  
pp. 745 ◽  
Author(s):  
Sylvia Sander ◽  
Andrea Koschinsky ◽  
Peter Halbach
Keyword(s):  
New Zealand ◽  
Water Column ◽  
Effective Means ◽  
Stripping Voltammetry ◽  
Speciation Analysis ◽  
Hydrothermal Activity ◽  
Lesser Antilles ◽  
Species Determination ◽  
Seafloor Hydrothermal Activity ◽  
Redox Speciation

Chromium redox speciation analysis was carried out onboard ship in several water column profiles off the islands of Dominica, St Lucia and Grenada (Lesser Antilles), and at two stations offshore from the Otago Peninsula (New Zealand). The catalytic adsorptive stripping voltammetry with diethylenetriaminepentaacetic acid as complexing reagent and a hanging mercury drop as a working electrode were used. In the samples from the Lesser Antilles, Cr(VI) concentrations ranged around a relatively constant background of 1.5–2.5 nM, except for one higher value of 4.3 nM, whereas Cr(III) was highly variable and reached maximum concentrations of 12 nM. Variable environmental influences, such as hydrothermal activity and atmospheric input, are probable sources for reduced chromium species. In contrast, the Cr(III) contribution was less than 50% of total Cr in subantarctic non-hydrothermal water offshore from the Otago Peninsula and the presence of Cr(III) was restricted to the upper 100 m of the water column. In these depth profiles, Cr (VI) (up to 3.7 nM) was clearly the dominating species.Onboard ship redox speciation was shown to be an effective means to avoid storing artefacts in species determination. We conclude that seafloor hydrothermal activity contributes significantly to the reduced Cr species chemistry of the surrounding seawater.

New sponge species from hydrothermal vent and cold seep sites off New Zealand

Zootaxa ◽  
2019 ◽  
Vol 4576 (3) ◽  
pp. 401 ◽  
Author(s):  
MICHELLE KELLY ◽  
ASHLEY A. ROWDEN
Keyword(s):  
New Zealand ◽  
Future Study ◽  
Hydrothermal Vent ◽  
Cold Seep ◽  
Sponge Species ◽  
The Third ◽  
The North ◽  
New Subgenus ◽  
The Future ◽  
Hydrothermal Vent Field

Three new sponge species in the demosponge families Chalinidae Gray and Suberitidae Schmidt are described from the Calypso hydrothermal vent field in the Bay of Plenty, and one species from seep sites along the Hikurangi Margin, to the east of the North Island, New Zealand. The Calypso hydrothermal vent field is dominated by the chalinid sponge Haliclona (Soestella) battershilli sp. nov., a large, cream-coloured, finely branched species, and the less common H. (Halichoclona) sonnae sp. nov., an encrusting, translucent white, cushion-shaped species. The third species, the suberitid sponge Protosuberites novaezelandiae sp. nov., forms encrustations with digitate projections. Haliclona (Halichoclona) sonnae sp. nov. and Protosuberites novaezelandiae sp. nov. represent new subgenus and genus records, respectively, for New Zealand waters. The methanotrophic suberitid sponge, Pseudosuberites thurberi sp. nov., is found at many of the cold seep sites on the Hikurangi Margin where it forms extensive, encrusting to digitate mats. The description of these species provides a basis for the future study of the ecology of sponges that are apparently endemic to vent and seep habitats off New Zealand. 

Evolution of Holocene sedimentary bentonite in a shallow-marine embayment, Firth of Thames, New Zealand

1993 ◽  
Vol 109 (3-4) ◽  
pp. 267-278 ◽  
Author(s):  
Tim R. Naish ◽  
Campbell S. Nelson ◽  
A.Peter W. Hodder
Keyword(s):  
New Zealand ◽  
Shallow Marine ◽  
Marine Embayment

New Early Paleocene Mollusca from the Wangaloa Formation of South Island, New Zealand

1993 ◽  
Vol 67 (3) ◽  
pp. 360-369 ◽  
Author(s):  
Jeffrey D. Stilwell
Keyword(s):  
New Zealand ◽  
Southern Hemisphere ◽  
New Genus ◽  
New Records ◽  
Genetic Isolation ◽  
Shallow Marine ◽  
Early Paleocene ◽  
Molluscan Fauna ◽  
Three New Species ◽  
Early Paleogene

New Mollusca from the shallow marine, highly fossiliferous Wangaloa Formation of southeastern Otago, South Island, New Zealand, are described. This paper reports three new species and one new genus: Leionucula palaioanaxea n. sp. of the Nuculidae, Pyropsis zinsmeisteri n. sp. of the Tudiclidae, and Wangacteon grebneffi n. gen. and sp. of the Acteonidae. These taxa represent new records in New Zealand of apparently endemic taxa. The molluscan fauna of the Wangaloa Formation is important in the understanding of Paleogene biogeography of the Southern Hemisphere and changes in faunal composition of the Cretaceous–Tertiary Gondwana Realm. Genus- and species-level endemism in the “Wangaloan” fauna is marked and is probably a reflection of “greater New Zealand” 's geographic and genetic isolation during the Paleocene. Although deposits containing early Paleogene Mollusca are generally rare in the Southern Hemisphere, comparisons of known Gondwana molluscan taxa and those of similar age in the Northern Hemisphere indicate that the Mollusca of the Wangaloa Formation have Early Paleocene affinities. Microfossil evidence, in addition, supports an Early Paleocene age for the fauna. However, an uppermost Cretaceous age is indicated for the basal part of the Wangaloa Formation stratigraphically below the shell beds, but the K–T boundary has yet to be located.

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