論文 - Reimer James Davis

Yellow tails in the Red Sea: Phylogeography of the Indo-Pacific goatfish Mulloidichthys flavolineatus reveals isolation in peripheral provinces and cryptic evolutionary lineages

Fernandez-Silva I.

Journal of Biogeography ( Journal of Biogeography )  42 ( 12 ) 2402 - 2413   2015年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Aim Broadly distributed reef fishes tend to have high gene flow mediated by a pelagic larval phase. Here, we survey a reef-associated fish distributed across half the tropical oceans, from the Red Sea to the central Pacific. Our goal is to determine whether genetic structure of the broadly distributed Yellowstripe Goatfish (Mulloidichthys flavolineatus) is defined by biogeographical barriers, or facilitated via larval dispersal. Location Red Sea, Indian Ocean, Pacific Ocean Methods Specimens were obtained at 19 locations from the Red Sea to Hawai'i. Genetic data include mtDNA cytochrome b (n = 217) and 12 microsatellite loci (n = 185). Analysis of molecular variance (AMOVA), structure, a parsimony network and coalescence analyses were used to resolve recent population history and connectivity. Results Population structure was significant (mtDNA Phi(ST) = 0.68, P < 0.001; microsatellite F-ST = 0.08, P < 0.001), but mostly driven by samples from the North-western (NW) Indian Ocean (including the Red Sea) and Hawai'i. There was little population structure across the Indian Ocean to the central Pacific. Hawai'i was distinguished as an isolated population (mtDNA Phi(ST) = 0.03-0.08, P = n.s.; microsatellites F-ST = 0.05-0.10, P < 0.001). Specimens from the NW Indian Ocean clustered as a distinct phylogenetic lineage that diverged approximately 493 ka (d = 1.7%), which indicates that these fish persisted in isolation through several Pleistocene glacial cycles. Main conclusions These data reinforce the emerging themes that: (1) phylogeographical breaks within species often coincide with biogeographical breaks based on species distributions, and (2) populations on the periphery of the range (NW Indian Ocean and Hawai'i) are isolated and may be evolutionary incubators producing new species.

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Zoantharia (Cnidaria: Anthozoa: Hexacorallia) of the south china sea and gulf of thailand: A species list based on past reports and new photographic records

Reimer J.

Raffles Bulletin of Zoology ( Raffles Bulletin of Zoology )  63   334 - 356   2015年09月

掲載種別: 研究論文（学術雑誌）

Zoantharia (Cnidaria: Anthozoa: Hexacorallia) of the south china sea and gulf of thailand: A species list based on past reports and new photographic records

Reimer JD, HB Wee, A Put Jr, BW Hoeksema

Raffles Bulletin of Zoology ( Raffles Bulletin of Zoology )  63   334 - 356   2015年09月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Colony-specific investigations reveal highly variable responses among individual corals to ocean acidification and warming.

Kavousi J, Reimer JD, Tanaka Y, Nakamura T

Marine environmental research ( Marine Environmental Research )  109   9 - 20   2015年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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As anthropogenic climate change is an ongoing concern, scientific investigations on its impacts on coral reefs are increasing. Although impacts of combined ocean acidification (OA) and temperature stress (T) on reef-building scleractinian corals have been studied at the genus, species and population levels, there are little data available on how individual corals respond to combined OA and anomalous temperatures. In this study, we exposed individual colonies of Acropora digitifera, Montipora digitata and Porites cylindrica to four pCO(2)-temperature treatments including 400 mu atm-28 degrees C, 400 mu atm-31 degrees C, 1000 mu atm-28 degrees C and 1000 mu atm-31 degrees C for 26 days. Physiological parameters including calcification, protein content, maximum photosynthetic efficiency, Symbiodinium density, and chlorophyll content along with Symbiodinium type of each colony were examined. Along with intercolonial responses, responses of individual colonies versus pooled data to the treatments were investigated. The main results were: 1) responses to either OA or T or their combination were different between individual colonies when considering physiological functions; 2) tolerance to either OA or T was not synonymous with tolerance to the other parameter; 3) tolerance to both OA and T did not necessarily lead to tolerance of OA and T combined (OAT) at the same time; 4) OAT had negative, positive or no impacts on physiological functions of coral colonies; and 5) pooled data were not representative of responses of all individual colonies. Indeed, the pooled data obscured actual responses of individual colonies or presented a response that was not observed in any individual. From the results of this study we recommend improving experimental designs of studies investigating physiological responses of corals to climate change by complementing them with colony-specific examinations. (C) 2015 Elsevier Ltd. All rights reserved.

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Unexpected diversity and new species in the sponge-Parazoanthidae association in southern Japan.

Montenegro J, Sinniger F, Reimer JD

Molecular phylogenetics and evolution ( Molecular Phylogenetics and Evolution )  89   73 - 90   2015年08月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Currently the genera Parazoanthus (family Parazoanthidae) and Epizoanthus (family Epizoanthidae) are the only sponge-associated zoantharians (Cnidaria, Anthozoa). The Parazoanthidae-sponge associations are widely distributed in tropical and subtropical waters from the intertidal to the deep sea in the Atlantic and Indo-Pacific Oceans. However, the taxonomic identification of both parties is often confused due to variable morphology and wide ecological ranges. In particular, Parazoanthidae species diversity remains poorly understood in the Indo-Pacific. In the present study, the diversity of the sponge-zoanthid association in the Indo-Pacific was investigated with 71 Parazoanthidae specimens collected from 29 different locations in Japan (n = 22), Australia (n = 6) and Florida, USA (n = 1). For all specimens morphological analyses were performed and total DNA was extracted and amplified for four DNA markers (COI-mtDNA, mt 16S-rDNA, ITS-rDNA and ALG11-nuDNA). The combined data demonstrate that the specimens of this study are clearly different from those of all described Parazoanthus species, and lead us to erect Umimayanthus gen. n., within family Parazoanthidae, containing the three newly described species U. chanpuru sp. n., U. miyabi sp. n., U. nakama sp. n. The new genus also includes the previously described species U. parasiticus (Duchassaing and Michelotti, 1860; comb. nov.), previously belonging to the genus Parazoanthus. Neighbor joining, maximum likelihood and Bayesian posterior probability phylogenetic trees clearly demonstrate the monophyly of Umimayanthus gen. n. to the exclusion of all outgroup sequences. The phylogenetic results were also compared to morphological features, and polyp sizes, amount of sand content in tissues, types of connections between polyps, and cnidae data, in particular holotrichs-1, were useful in distinguishing the different species within this new genus. This new genus can be distinguished from all other Zoantharia by a unique and conserved 9 bp insertion and a 14 bp deletion in the mt 16S-rDNA region. Additionally, compared to Parazoanthus sensu stricto (i.e. P. axinellae [Schmidt, 1862]), Umimayanthus spp. are only found associated to sponges, and have a coenenchyme much less developed than Parazoanthus sensu strict. Each new species can be distinguished from other congeners by a unique DNA sequence, numbers of tentacle, maximum sizes of holotrichs, associated sponge morphology, and colony morphology. The identification of the host sponge species is the next logical step in this research as this may also aid in the distinction of Umimayanthus species. (C) 2015 Elsevier Inc. All rights reserved.

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Effects of causeway construction on environment and biota of subtropical tidal flats in Okinawa, Japan.

Reimer JD, Yang SY, White KN, Asami R, Fujita K, Hongo C, Ito S, Kawamura I, Maeda I, Mizuyama M, Obuchi M, Sakamaki T, Tachihara K, Tamura M, Tanahara A, Yamaguchi A, Jenke-Kodama H

Marine pollution bulletin ( Marine Pollution Bulletin )  94 ( 1-2 ) 153 - 67   2015年05月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Okinawa, Japan is known for its high marine biodiversity, yet little work has been performed on examining impacts of numerous large-scale coastal development projects on its marine ecosystems. Here, we examine apparent impacts of the construction of the Kaichu-Doro causeway, which was built over 40 years ago. The causeway is a 4.75 km long embankment that divides a large tidal flat and has only two points of water exchange along its entire length. We employed quadrats, transects, sampling, visual surveys, and microbial community analyses combined with environmental, water quality data, and 1 m cores, at five stations of two paired sites each (one on each side of Kaichu-Doro) to investigate how the environment and biota have changed since the Kaichu-Doro was built. Results indicate reduction in water flow, and site S1 was particularly heavily impacted by poor water quality, with low diversity and disturbed biotic communities. (C) 2015 The Authors. Published by Elsevier Ltd.

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First record of Nanozoanthidae from the Red Sea

Reimer J.D.

Marine Biodiversity Records ( Marine Biodiversity Records )  8   2015年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Here we report on the first finding of Nanozoanthidae (Anthozoa: Hexacorallia: Zoantharia) in the Red Sea and the first record west of Western Australia. A single specimen of Nanozoanthus sp. was found at a depth of 13 m off Dumsuq Island, the Farasan Islands, Saudi Arabia (16�33.846′N 42�03.510′E) during SCUBA surveys. Previous research had hypothesized that the genus could potentially be widespread in the Indo-Pacific and was simply undetected due to its small and cryptic nature, and the current specimen provides support for this idea. Such findings demonstrate the importance of biodiversity surveys by taxonomic specialists in understudied marine regions.

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First record of the genus Umimayanthus from Palau and Micronesia

Montenegro J.

Marine Biodiversity Records ( Marine Biodiversity Records )  8   2015年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Until recently, the only sponge-associated genera in the order Zoantharia were Parazoanthus (family Parazoanthidae), Epizoanthus and Thoracactis (family Epizoanthidae), both within the suborder Macrocnemina. The taxonomy of the genus Parazoanthus, as originally described, has been undergoing revision since 2010, with several species, genera and even families described. In 2015, multiple molecular markers were used in combination with morphological characteristics to erect the genus Umimayanthus inside the family Parazoanthidae. It included three species described from southern Japan, with other records for some of the species from the Great Barrier Reef, New Caledonia and the Red Sea. However, little is known of its distribution in the Pacific Islands. Here we report on the finding of Umimayanthus specimens in Palau, Micronesia, representing the first records for this region. A total of 32 specimens of Umimayanthus were collected from seven different locations eight of the specimens were identified as Umimayanthus chanpuru, while the remaining 24 colonies were only identified to genus level.

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Effect of phase shift from corals to zoantharia on reef fish assemblages

Cruz I.C.S.

PLoS ONE ( PLoS ONE )  10 ( 1 )   2015年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Consequences of reef phase shifts on fish communities remain poorly understood. Studies on the causes, effects and consequences of phase shifts on reef fish communities have only been considered for coral-to-macroalgae shifts. Therefore, there is a large information gap regarding the consequences of novel phase shifts and how these kinds of phase shifts impact on fish assemblages. This study aimed to compare the fish assemblages on reefs under normal conditions (relatively high cover of corals) to those which have shifted to a dominance of the zoantharian Palythoa cf. variabilis on coral reefs in Todos os Santos Bay (TSB), Brazilian eastern coast. We examined eight reefs, where we estimated cover of corals and P. cf. variabilis and coral reef fish richness, abundance and body size. Fish richness differed significantly between normal reefs (48 species) and phase-shift reefs (38 species), a 20% reduction in species. However there was no difference in fish abundance between normal and phase shift reefs. One fish species, Chaetodon striatus, was significantly less abundant on normal reefs. The differences in fish assemblages between different reef phases was due to differences in trophic groups of fish; on normal reefs carnivorous fishes were more abundant, while on phase shift reefs mobile invertivores dominated.

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First record of the coral-killing sponge Terpios hoshinota in the Maldives and Indian Ocean

Montano S.

Bulletin of Marine Science ( Bulletin of Marine Science )  91 ( 1 ) 97 - 98   2015年01月 [ 査読有り ]

掲載種別: 研究論文（その他学術会議資料等）

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Descriptions of two azooxanthellate Palythoa species (Subclass Hexacorallia, Order Zoantharia) from the Ryukyu Archipelago, southern Japan.

Irei Y, Sinniger F, Reimer JD

ZooKeys ( ZooKeys )  ( 478 ) 1 - 26   2015年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Two new species of zoantharians (Hexacorallia, Zoantharia, Sphenopidae), Palythoa mizigama sp. n. and P. umbrosa sp. n., are described from the Ryukyu Archipelago, southern Japan. Unlike almost all other known Palythoa spp., both species are azooxanthellate and inhabit low-light environments such as floors or sides of caves, crevasses, or hollows of shallow coral reefs. The two species were initially considered to be the same species from their similar habitat environments and highly similar morphological features. However, phylogenetic analyses of nuclear internal transcribed spacer (ITS) ribosomal DNA, mitochondrial 16S ribosomal DNA, and cytochrome oxidase subunit I (COI) sequences revealed that these two species have a genetically distant relationship within the genus Palythoa. Morphological characteristics, including polyp size, tentacle number, external/internal coloration, and types and sizes of cnidae were examined in this study. As a result, only tentacle coloration was found to be useful for the morphological distinction between the two species. Palythoa mizigama possesses white tentacles with black horizontal stripes while P. umbrosa possesses white tentacles without any stripe patterns. Considering their distant phylogenetic relationship, it can be assumed that their unique yet similar morphological and ecological characteristics developed independently in each species as an example of parallel evolution.

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A new genus and species of octocoral with aragonite calcium-carbonate skeleton (Octocorallia, Helioporacea) from Okinawa, Japan.

Miyazaki Y, Reimer JD

ZooKeys ( ZooKeys )  2015 ( 511 ) 1 - 23   2015年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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A new genus and species of octocoral with a calcium-carbonate skeleton, Nanipora kamurai sp. n., is described from a shallow coral reef in Okinawa, Japan. Contrary to most octocorals, the skeleton is composed of crystalline aragonite as in blue coral Heliopora. The results of molecular phylogenetic analyses of sequences of mtMutS, COI, and ITS1-5.8s-ITS2-28S region suggest Nanipora gen. n. specimens should be included in order Helioporacea. Based on morphological results compared with other Helioporacea including the genus Epiphaxum (family Lithotelestidae), we establish the new genus Nanipora within Lithotelestidae. This is the first time that a close molecular phylogenetic relationship between Heliopora and a related genus within Helioporacea has been revealed.

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New records of the rare calcareous sponge Paragrantia waguensis Hôzawa, 1940

Van Soest R

ZooKeys ( ZooKeys )  2015 ( 546 ) 1 - 20   2015年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Paragrantia waguensis Hozawa is reported from coastal reefs of the island of Okinawa. This rare species was previously known only from Central Japan, Mie Prefecture. It has peculiar apopylar tetractine spicules, so far unique among Calcarea. We present in situ images of the species and a full description including SEM images of skeletal structure and spicule complement. The status of Paragrantia as a separate genus of the family Grantiidae distinct from Grantia Fleming is confirmed on the basis of a morphological and molecular comparison with the European type species of Grantia, G. compressa (Fabricius).

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Buried fossil microatolls off the Kaichu-Doro Causeway, between Okinawa and Henza Islands

Fujita K, Hongo C, Koutoku M, Ito S, Asami R, Reimer JD

Fauna Ryuykuana   24   13 - 15   2015年 [ 査読有り ]

掲載種別: 研究論文（その他学術会議資料等）

Vertical distribution of zooxanthellate zoantharians on coral reefs of Terengganu Islands, Malaysia

HB Wee, HC Liew, Z Bachok, JD Reimer

Plateaux   12   29 - 37   2015年 [ 査読有り ]

掲載種別: 研究論文（その他学術会議資料等）

Four new species and one new genus of zoanthids (Cnidaria: Hexacorallia) from the Galápagos

James Davis Reimer, Takuma Fujii

ZooKeys ( その他の出版社 )  42   1 - 36   2010年03月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Investigations into the reproductive patterns, ecology and morphology in the zoanthid genus Palythoa (Cnidaria: Anthozoa: Hexacorallia) in Okinawa, Japan

Eriko Shiroma, James Davis Reimer

Zoological Studies ( その他の出版社 )  49   182 - 194   2010年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

The Parazoanthidae (Hexacorallia: Zoantharia) DNA taxonomy: description of two new genera

Frederic Sinniger, James Davis Reimer, Jan Pawlowski

Marine Biodiversity ( その他の出版社 )  40   57 - 70   2010年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Presence of Abyssoanthus sp. in the Mediterranean Sea: indication of a new cold seep or of ecological tolerance of Abyssoanthus to non-chemotrophic environments?

Frederic Sinniger, Kevin Zelnio, Marco Taviani, James Davis Reimer

Cahiers de Biologie Marine ( その他の出版社 )  in press   2010年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Domination and disappearance of the black sponge: a quarter century after the initial Terpios outbreak in southern Japan

James Davis Reimer, Yoko Nozawa, Euichi Hirose

Zoological Studies ( その他の出版社 )  in press   2010年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）