Gelatinous zooplankton of the Marshall Islands, Central Tropical Pacific: an inventory

Abstract. Marine isotope stage 5 deposits have been reported on many tropical Pacific islands. This paper presents a database compiled through the review of MIS 5e (Last Interglacial – LIG) coral reef records from islands belonging to French Polynesia (Anaa, Niau, Makatea, Moruroa, Takapoto, Bora Bora), the Hawaiian Islands (Oahu, Lana'i, Midway Atoll), Tuvalu, Kiribati (Christmas Island, Tarawa), the Cook Islands (Mangaia, Atiu, Mitiaro, Mauke, Pukapuka, Rakahanga, Rarotonga), Tonga, Samoa, the Federal States of Micronesia, the Mariana Islands, the Marshall Islands (Enewetak, Bikini), New Caledonia, Papua New Guinea, Vanuatu, Fiji and Niue. Studies reporting other sea-level indicators dated to other Pleistocene interglacials and Holocene sea-level indicators were not inserted in the database, but are included in this data description paper for completeness. Overall, about 300 studies concerning Pleistocene and Holocene sea-level indicators have been reviewed, and finally 284 data points from 35 studies on the MIS 5e have been inserted in the database. The main sea-level indicators include emerged coral reef terraces, but also reef units recovered in drill cores from a few islands, thus reflecting the diversity of tectonic settings and sampling approaches. Future research should be directed towards better constrained relative sea-level (RSL) reconstructions, including more precise chronological data, more accurate elevation measurements as well as a better refinement of the palaeo-water depth significance of coralgal assemblages. The database for Tropical Pacific Islands is available open-access at this link: http://doi.org/10.5281/zenodo.3991672 (Hallmann and Camoin, 2020).

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A standardized database of Marine Isotopic Stage 5e sea-level proxies on tropical Pacific islands

Earth System Science Data ◽

10.5194/essd-13-2651-2021 ◽

2021 ◽

Vol 13 (6) ◽

pp. 2651-2699

Author(s):

Nadine Hallmann ◽

Gilbert Camoin ◽

Jody M. Webster ◽

Marc Humblet

Keyword(s):

Coral Reef ◽

Sea Level ◽

Pacific Islands ◽

Tropical Pacific ◽

Marshall Islands ◽

Last Interglacial ◽

Federal States ◽

Data Points ◽

Mis 5E ◽

Holocene Sea Level

Abstract. Marine Isotope Stage 5 deposits have been reported on many tropical Pacific islands. This paper presents a database compiled through the review of MIS 5e (last interglacial – LIG) coral reef records from islands belonging to French Polynesia (Anaa, Niau, Makatea, Moruroa, Takapoto, Bora Bora), the Hawaiian Islands (Oahu, Lanai, Midway Atoll), Tuvalu, Kiribati (Christmas Island, Tarawa), the Cook Islands (Mangaia, Atiu, Mitiaro, Mauke, Pukapuka, Rakahanga, Rarotonga), Tonga, Samoa, the Federal States of Micronesia, the Mariana Islands, the Marshall Islands (Enewetak, Bikini), New Caledonia, Papua New Guinea, the Solomon Islands, Vanuatu, Fiji and Niue. Studies reporting other sea-level indicators dated to other Pleistocene interglacials and Holocene sea-level indicators were not inserted in the database but are included in this data description paper for completeness. Overall, about 300 studies concerning Pleistocene and Holocene sea-level indicators have been reviewed, and finally 163 age data points and 94 relative sea-level (RSL) data points from 38 studies on the MIS 5e have been inserted in the database. An additional 155 age data points have been reviewed; i.e. the tropical Pacific islands database contains 318 age data points. The main sea-level indicators include emerged coral reef terraces, but also reef units recovered in drill cores from a few islands, thus reflecting the diversity of tectonic settings and sampling approaches. Future research should be directed towards better constrained RSL reconstructions, including more precise chronological data, more accurate elevation measurements and a better refinement of the palaeo-water-depth significance of coralgal assemblages. The database for tropical Pacific islands is available open access at this link: https://doi.org/10.5281/zenodo.3991672 (Hallmann and Camoin, 2020).

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Structure of hyperiid amphipod assemblages on Isla Gorgona, eastern tropical Pacific off Colombia

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315411001780 ◽

2011 ◽

Vol 92 (7) ◽

pp. 1489-1499 ◽

Cited By ~ 4

Author(s):

Bellineth Valencia ◽

Alan Giraldo

Keyword(s):

Similarity Index ◽

Zooplankton Community ◽

Sampling Period ◽

Gelatinous Zooplankton ◽

Tropical Pacific ◽

Dry Season ◽

The Other ◽

Subsurface Water ◽

Eastern Tropical Pacific ◽

Entire Sampling Period

Temporal variation of hyperiid amphipod structure assemblages was studied on Isla Gorgona, eastern tropical Pacific (ETP) off Colombia between September 2005 and August 2006. Forty-six species were found during the entire sampling period:Hyperioides sibaginis, Lestrigonus bengalensis, Phronimopsis spinifera, Tetrathyrus forcipatusandParalycaea gracilisdominated the assemblage, representing 92%. The dendogram based on the Bray–Curtis similarity index showed that the hyperiid assemblages were separated into two groups, which did not coincide with the seasonality described for the ETP (wet versus dry season). Rather, groups comprised wet (May to November) and dry season months (December to April). The first group included November, December, February and March. During these months, significantly higher hyperiid richness, diversity and abundance were found, although colder subsurface water temperatures in Gorgona were registered only during February and March. The other group included May to October and January, and was characterized by lower hyperiid diversity and abundance values. Significant correlations were found between hyperiid abundance and the possible gelatinous zooplankton hosts (medusae, siphonophores and salps). This study contributes to increasing knowledge of the zooplankton community in the Panama Bight, as well as of a poorly studied group in the ETP.

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Recent movements of the ITCZ in the tropical Pacific and ramifications for the Marshall Islands

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1307/6/7/072010 ◽

2009 ◽

Vol 6 (7) ◽

pp. 072010 ◽

Cited By ~ 2

Author(s):

J Sachs ◽

Mark Stege ◽

T Keju

Keyword(s):

Tropical Pacific ◽

Marshall Islands ◽

The Tropical Pacific

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New records of gelatinous zooplankton from an oceanic island in the Eastern Tropical Pacific

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315417000558 ◽

2017 ◽

Vol 98 (6) ◽

pp. 1219-1226

Author(s):

Marco Corrales-Ugalde ◽

Andrés J. Quesada ◽

Beatriz Naranjo-Elizondo ◽

Jorge Cortés

Keyword(s):

New Records ◽

First Record ◽

Gelatinous Zooplankton ◽

Tropical Pacific ◽

Costa Rican ◽

Oceanic Island ◽

Eastern Tropical Pacific ◽

Pelagic Environment ◽

Present Information ◽

Cocos Island

Gelatinous zooplankton are an abundant and diverse group of animals in the pelagic environment. However, knowledge of species diversity and spatial distributions, as well as their ecological role, is scarce. We present information of epi- and mesopelagic gelatinous zooplankton recorded by the ‘DeepSee’ submersible between 2006 and 2012 at Isla del Coco (Cocos Island), Costa Rica, an oceanic island in the Eastern Tropical Pacific. Two species of scyphomedusae, three species of hydromedusae, two genera of siphonophores, and two species of ctenophores were observed in the videos, at depths between 50 and 400 m. None of these species had been previously recorded in the waters around the island. Furthermore, except for the jellyfish Pelagia noctiluca and a siphonophore in the genus Praya, all are new records for Costa Rican waters. This study also includes the first record of the cnidarians Modeeria rotunda, Solmissus sp., Halitrephes maasi and Apolemia spp., and the ctenophore Thalassocalyce inconstans in the Eastern Tropical Pacific. We show that surveys in regions with little information about gelatinous zooplankton may broaden our knowledge of their natural history and may result in new records of gelatinous species.

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