Journal of The Japanese Coral Reef Society最新文献_第2页

Acropora community composition at Siladen Island, North Sulawesi, Indonesia 印度尼西亚北苏拉威西岛Siladen岛鹿角虫群落组成

Journal of The Japanese Coral Reef Society Pub Date : 2007-12-10 DOI: 10.3755/JCRS.9.23

Frangky Runtukahu, S. Pinca, P. Scaps

引用次数: 3

Algicidal bacteria in a high-latitude coral community and their effect on zooxanthellae (Symbiodinium spp.) isolated from the coral Acropora formosa 高纬度珊瑚群落中的杀藻细菌及其对台湾鹿角珊瑚虫黄藻的影响

Journal of The Japanese Coral Reef Society Pub Date : 2007-12-10 DOI: 10.3755/JCRS.9.13

S. Keshavmurthy, K. Fukami, E. Nakao

{"title":"Algicidal bacteria in a high-latitude coral community and their effect on zooxanthellae (Symbiodinium spp.) isolated from the coral Acropora formosa","authors":"S. Keshavmurthy, K. Fukami, E. Nakao","doi":"10.3755/JCRS.9.13","DOIUrl":"https://doi.org/10.3755/JCRS.9.13","url":null,"abstract":"In order to investigate the potential effect of algicidal (algae-killing) bacteria on zooxanthellae, some bacterial strains having algicidal properties were isolated from a coral community in the south of Kochi Prefecture (Japan) and their effect on freshly isolated zooxanthellae from Acropora formosa and zooxanthellae in culture (CCMP 2466-Symbiodinium goreaui (Trench et Blank)) was observed. Out of twenty bacterial strains isolated, three strains (strain 4-2DW-1, strain 4-1SW-1 and strain 1B) were found to have strong algicidal activity towards zooxanthellae with considerable cell degradation in up to five different grades (transparent/bleached cells, shrunken cells, swollen cells, necrosis and degradation). In case of freshly isolated zooxanthellae, the algicidal activity of strains 1B, 4-2DW-1 and 4-1SW1 affected 64-86%, 48-67% and 56-75.4% of cells respectively. However, in case of cultured zooxanthellae CCMP 2466-Symbiodinium goreaui (Trench et Blank), only 8-11% of zooxanthellae cells were affected. The results of this study indicate the presence of algicidal bacteria in coral communities, which can influence the health condition of zooxanthellae and suggests that algicidal bacteria might be playing a role in bleaching of corals susceptible to bacterial attack.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"300 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123084767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

アザミサンゴの種内変異型の研究 : ポリプ色彩パターン、刺胞形態、共骨密度研究蓟珊瑚的种内变型:多色彩模式，刺细胞形态，共骨密度

Journal of The Japanese Coral Reef Society Pub Date : 2007-12-10 DOI: 10.3755/JCRS.9.49

Defny S. Wewengkang, 俊樹渡邉, 道雄日高

{"title":"アザミサンゴの種内変異型の研究 : ポリプ色彩パターン、刺胞形態、共骨密度","authors":"Defny S. Wewengkang, 俊樹渡邉, 道雄日高","doi":"10.3755/JCRS.9.49","DOIUrl":"https://doi.org/10.3755/JCRS.9.49","url":null,"abstract":"Many scleractinian corals exhibit intraspecific variation in color and colony morphology. Several color morphs of Galaxea fascicularis have been described in Okinawan populations. Colonies of G. fascicularis have also been divided into types based on the shape of tentacular microbasic p-mastigophore (MpM) nematocysts and the density of the coenosteum. To understand the relationships of color morphs and types based on various characters, we studied color pattern of polyps, shape of tentacular nematocysts, and density of the coenosteum of colonies of G. fascicularis collected at Sesoko Island, Zampa and Teniya, Okinawa. Colonies of G. fascicularis were divided into three morphotypes based on the shape of tentacular MpM nematocysts. In addition to two morphotypes S and H, which were previously reported to possess different types of MpMs, we found mixed-type colonies (morphotype M) whose tentacles possessed both types of nematocysts. Although the average size of skeletal vesicles of the coenosteum of morphotype S colonies was greater than that of morphotype H colonies, the size of skeletal vesicles varied largely among colonies belonging to the same morphotype and appeared to be affected by environmental factors. We could not find clear relationships between the color morphs and the morphotypes based on the shape of tentacular nematocysts in G. fascicularis.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"39 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114022824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

サンゴ礁海域における海洋保護区 (MPA) の多様性と多面的機能珊瑚礁海域海洋保护区(MPA)的多样性和多方面功能

Journal of The Japanese Coral Reef Society Pub Date : 2007-05-21 DOI: 10.3755/JCRS.8.91

鹿熊信一郎

{"title":"サンゴ礁海域における海洋保護区 (MPA) の多様性と多面的機能","authors":"鹿熊信一郎","doi":"10.3755/JCRS.8.91","DOIUrl":"https://doi.org/10.3755/JCRS.8.91","url":null,"abstract":"フィジー、サモア、フィリピン、インドネシア、モーリシャス、および沖縄の5地区のサンゴ礁海域MPAを事例に、主に水産資源管理を目的としたMPAの多様性、それ以外の目的を有す多面的機能を整理するとともに、効果的なMPAの設定方法、適正なMPAの面積を決める方法を考察した。その結果、MPAが熱帯亜熱帯における強力な資源管理ツールであることを確認した。MPAの形態は多様で、完全禁漁か多目的利用か、政府主体か村落主体か、永久設定か期間限定か、対象魚種を限定するかどうかによって性格は大きく異なることがわかった。また、面積は様々であり、機能も生態系保全やエコツーリズムの場として利用することを主目的とするものもあった。生物多様性のためにはMPAは大きくあるべきだが、漁業者には大きいMPAは操業区域の縮小を意味する。また、エコツーリズムによる利用も、漁撈文化・食文化と対立する可能性がある。このバランスをとるには、MPA内の生物がMPA外へ拡散するスピルオーバー効果を定量的に調査すると同時に、地域住民の参加を得てMPAの位置・面積などを決定し、順応的にMPAを改善していくべきだろう。","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"212 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114318322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A new genus of paralcyoniid soft corals (Octocorallia, Alcyonacea, Paralcyoniidae) from the Indo-West Pacific 印-西太平洋副珊瑚纲软珊瑚一新属(副珊瑚亚，副珊瑚科，副珊瑚科)

Journal of The Japanese Coral Reef Society Pub Date : 2006-06-15 DOI: 10.3755/JCRS.8.25

L. Ofwegen, Y. Benayahu

引用次数: 7

Air-sea CO2 flux and gas exchange coefficient at the Sesoko coral reefs, Okinawa, Japan 日本冲绳县雪子古珊瑚礁的海气二氧化碳通量和气体交换系数

Journal of The Japanese Coral Reef Society Pub Date : 2006-06-15 DOI: 10.3755/JCRS.8.51

Y. Kitada, H. Fujimura, R. Tokeshi, T. Oomori

{"title":"Air-sea CO2 flux and gas exchange coefficient at the Sesoko coral reefs, Okinawa, Japan","authors":"Y. Kitada, H. Fujimura, R. Tokeshi, T. Oomori","doi":"10.3755/JCRS.8.51","DOIUrl":"https://doi.org/10.3755/JCRS.8.51","url":null,"abstract":"The partial pressure of CO2 in seawater and air-sea CO2 flux were measured at the Sesoko coral reefs in Okinawa, Japan, and the effect of various perturbations on the gas exchange coefficient is discussed. The CO2 flux varied from -1.0 to 1.3mmol m-2h-1, which corresponded with the variation in partial pressure of CO2 in seawater. Atmospheric CO2 was absorbed by seawater during the day and released at night. This was mainly because of community photosynthesis and respiration. The gas exchange coefficient obtained from the chamber method was relatively larger than the wind dependent gas exchange coefficient. In the present study, the gas exchange coefficient was 5 and 30 times higher than that reported by Wanninkhof (1992) and Liss and Merlivat (1986), respectively when the wind velocity was set to 2.8m s-1. Our result (13.8±2.7cm h-1) was close to that reported by Komori and Shimada (1995), which took into account both the effects of turbulence and wind velocity on the gas exchange coefficient, indicating that not only wind, but also the effects of turbulence and other factors are important in the coefficient estimation at the Sesoko coral reefs.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127780142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Thermal inhibition and recovery of the maximum quantum yield of photosystem II and the maximum electron transport rate in zooxanthellae of a reef-building coral 造礁珊瑚虫黄藻最大量子产率和最大电子传递速率的热抑制和恢复

Journal of The Japanese Coral Reef Society Pub Date : 2006-06-15 DOI: 10.3755/JCRS.8.1

R. Bhagooli, M. Hidaka

{"title":"Thermal inhibition and recovery of the maximum quantum yield of photosystem II and the maximum electron transport rate in zooxanthellae of a reef-building coral","authors":"R. Bhagooli, M. Hidaka","doi":"10.3755/JCRS.8.1","DOIUrl":"https://doi.org/10.3755/JCRS.8.1","url":null,"abstract":"To examine whether damage to zooxanthellar photosystem II (PSII) is the primary step of thermally induced coral bleaching, we first assessed the relationship between the maximum quantum yield of PSII (Fv/Fm) or active PSII centers (Fv/Fo) and maximum electron transport rate (ETRmax), which represent the PSII activity and electron flow beyond the PSII, respectively, in the symbiotic algae of the coral Pachyseris rugosa. Next, the photo-physiological responses of the symbionts to stress treatments of 1h high temperature (33.5°C) and/or high light (1030μmol quanta m-2 s-1) stress and 6h recovery were investigated. The 1h high temperature treatment in darkness produced a significant, but reversible (6h recovery) decline in ETRmax without any change in Fv/Fm. The 1h high light treatment reduced Fv/Fm, but not ETRmax. High temperature in combination with high light resulted in a more pronounced reduction in Fv/Fm, along with a significant decline in ETRmax. Neither Fv/Fm nor ETRmax recovered fully within 6h. Reversible increases in non-photochemical quenching (NPQ), energy dissipation in PSII, were also recorded. Chloramphenicol (CAP), an inhibitor of synthesis of D1 protein of PSII reaction center, revealed that a minimum of -60% of the Fv/Fm or -30% of active PSII centers (Fv/Fo) is required to maintain ETRmax in the in hospite symbionts. These results suggest that the primary step of heat-induced damage in the symbiont's photosynthetic apparatus involves a component beyond the PSII, probably at the level of the dark reaction as indicated by reduced ETRmax and the PSII damage is secondary.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"15 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113976227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Chemical impact of the acidic red soil on seawater 酸性红壤对海水的化学影响

Journal of The Japanese Coral Reef Society Pub Date : 2006-06-15 DOI: 10.3755/JCRS.8.13

Mohamed M. Kombo, Said Suleiman Bakari, R. Shinjo, A. Tokuyama

{"title":"Chemical impact of the acidic red soil on seawater","authors":"Mohamed M. Kombo, Said Suleiman Bakari, R. Shinjo, A. Tokuyama","doi":"10.3755/JCRS.8.13","DOIUrl":"https://doi.org/10.3755/JCRS.8.13","url":null,"abstract":"Red soil contamination into marine ecosystems such as coral reefs and estuaries is a prevalent environmental problem in the Okinawa Islands. This study was conducted to examine the chemical impact of Okinawan red soil on seawater. The different soil weights were mixed and shaken with 100 mL of seawater for four hours to obtain the extracts. The pH, concentrations of Na+, K+, Ca+, Mg2+, Al3+ and dissolved silica were then determined. The soil is acidic with a pH value of 5.03, dominated by SiO2 and Al2O3. The pH of the Zampa cape seawater was 8.23 and decreased with soil weight to the lowest value of 4.06. The Al concentration in the seawater was 0.0256 megL-1 and increased with soil to solution ratio to the maximum value of 5.95 megL-1. The base metal concentrations decreased from the seawater by 23.5%, 8.04%, and 3.59% in extracts for K+, Ca2+and Mg2+, respectively, while Na+ was relatively stable to change. The dissolved SiO2 increased from 0.430 mgL-1 in the seawater to the maximum value of 20.0 mgL-1 in ground soil. The Summation of decreasing K+, Ca2+and Mg2+ concentrations and increasing Al3+ and W in the extracts showed a high correlation coefficient (P<0.001), which largely suggests an exchange process. The significant correlations between logarithmic concentrations of Al3+ and silica vs. pH (P<0.001) also suggest the importance of W to release soluble Al as well as hydrogen-promoted weathering of silicates. Physical features such as sedimentation and turbidity do affect coral reefs, but possibly chemical effects such as the elevated Al concentration observed in coastal seawaters may also interfere with the coral's well being at significant red soil-affected areas in the Okinawa Islands.","PeriodicalId":432348,"journal":{"name":"Journal of The Japanese Coral Reef Society","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115338741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

High cadmium concentration in the estuarine sediment of the Miyara River (Ishigaki Island) 宫原河(石垣岛)河口沉积物中镉含量高

Journal of The Japanese Coral Reef Society Pub Date : 2006-06-15 DOI: 10.3755/JCRS.8.71

K. Abe

引用次数: 3

Preliminary survey and diet analysis of seagrass bed fishes at Mauritius, western Indian Ocean 西印度洋毛里求斯海草床鱼初步调查及食性分析

Journal of The Japanese Coral Reef Society Pub Date : 2006-06-15 DOI: 10.3755/JCRS.8.61

Y. Nakamura, H. Terashima, Samyan Chettanand, Naoshi Sato, H. Ida

引用次数: 7