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Kodama K, Kuroki M, Yamakawa T, Shimizu M, Kintsu H, Horiguchi T. Remarkable shifts in the megabenthic community structure over four decades in Tokyo Bay, Japan, in relation to environmental variations. MARINE ENVIRONMENTAL RESEARCH 2024; 200:106640. [PMID: 39013226 DOI: 10.1016/j.marenvres.2024.106640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 06/25/2024] [Accepted: 07/05/2024] [Indexed: 07/18/2024]
Abstract
We investigated long-term changes in the megabenthic community in Tokyo Bay, Japan, using data from fisheries-independent trawl surveys conducted from 1977 to 2023. In addition, we examined the potential relationship between changes in biotic communities and environmental conditions. The total abundance and biomass exhibited an increasing trend until 1987, followed by a substantial decline from the late 1980s to the 1990s due to a decrease in small to medium-sized fish and crustacean species. Meanwhile, a marked increase in the number of large fish (including elasmobranchs), mollusks, and echinoids, was observed in the 2000s. These shifts in the megabenthic community structure were correlated with an increase in water temperature and a decrease in nutrient concentrations and copepod densities. Cumulative evidence suggests that a remarkable shift in the megabenthic community structure occurred between the 1970s and the 2020s, which was possibly associated with variations in the environmental conditions in Tokyo Bay.
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Affiliation(s)
- Keita Kodama
- Health and Environmental Risk Division, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki, 305-8506, Japan.
| | - Mari Kuroki
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo, Tokyo, 113-8657, Japan
| | - Takashi Yamakawa
- Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Bunkyo, Tokyo, 113-8657, Japan
| | - Makoto Shimizu
- Faculty of Agriculture, The University of Tokyo, Bunkyo, Tokyo, 113-8657, Japan
| | - Hiroyuki Kintsu
- Health and Environmental Risk Division, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
| | - Toshihiro Horiguchi
- Health and Environmental Risk Division, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki, 305-8506, Japan
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Tremblay LA, Chariton AA, Li MS, Zhang Y, Horiguchi T, Ellis JI. Monitoring the Health of Coastal Environments in the Pacific Region-A Review. TOXICS 2023; 11:277. [PMID: 36977042 PMCID: PMC10059979 DOI: 10.3390/toxics11030277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/07/2023] [Accepted: 03/17/2023] [Indexed: 06/18/2023]
Abstract
Coastal areas provide important ecological services to populations accessing, for example, tourism services, fisheries, minerals and petroleum. Coastal zones worldwide are exposed to multiple stressors that threaten the sustainability of receiving environments. Assessing the health of these valuable ecosystems remains a top priority for environmental managers to ensure the key stressor sources are identified and their impacts minimized. The objective of this review was to provide an overview of current coastal environmental monitoring frameworks in the Asia-Pacific region. This large geographical area includes many countries with a range of climate types, population densities and land uses. Traditionally, environmental monitoring frameworks have been based on chemical criteria set against guideline threshold levels. However, regulatory organizations are increasingly promoting the incorporation of biological effects-based data in their decision-making processes. Using a range of examples drawn from across the region, we provide a synthesis of the major approaches currently being applied to examine coastal health in China, Japan, Australia and New Zealand. In addition, we discuss some of the challenges and investigate potential solutions for improving traditional lines of evidence, including the coordination of regional monitoring programs, the implementation of ecosystem-based management and the inclusion of indigenous knowledge and participatory processes in decision-making.
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Affiliation(s)
- Louis A. Tremblay
- Cawthron Institute, Private Bag 2, Nelson 7042, New Zealand
- School of Biological Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Anthony A. Chariton
- Department of Biological Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Meng-Shuo Li
- State Key Laboratory of Marine Environmental Science of China, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Yong Zhang
- State Key Laboratory of Marine Environmental Science of China, College of the Environment and Ecology, Xiamen University, Xiamen 361102, China
| | - Toshihiro Horiguchi
- Ecosystem Impact Research Section, Health and Environmental Risk Division, National Institute for Environmental Studies, 16-2, Onogawa, Tsukuba 305-8506, Ibaraki, Japan
| | - Joanne I. Ellis
- School of Sciences, Waikato University, Tauranga 3240, New Zealand
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Park JC, Kodama K, Oyama M, Lee JH, Ohta Y, Yamaguchi A, Shiraishi H, Horiguchi T. Changes in feeding habits of the starspotted smooth-hound, Mustelus manazo, in Tokyo Bay between periods with different stock size levels. MARINE POLLUTION BULLETIN 2020; 152:110863. [PMID: 32479271 DOI: 10.1016/j.marpolbul.2019.110863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 12/19/2019] [Accepted: 12/24/2019] [Indexed: 06/11/2023]
Abstract
We investigated differences in the feeding habits of the starspotted smooth-hound, Mustelus manazo, in Tokyo Bay between the mid-1990s (low stock size) and the late 2000s (high stock size). The frequency of M. manazo with empty stomachs increased from 5.9% in the mid-1990s to 16.1% in the late 2000s. A decrease in the relative weight of the stomach contents was evident from the mid-1990s to the late 2000s, especially in the small size classes, along with changes in the species composition in the stomach contents. Although crustaceans were the main constituents of the stomach contents, the proportion of crabs increased while those of shrimps and hermit crabs decreased. Changes in the feeding habits of M. manazo may be associated with shifts in the benthic community structure in Tokyo Bay.
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Affiliation(s)
- Jeong-Chae Park
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Keita Kodama
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
| | - Masaaki Oyama
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Jeong-Hoon Lee
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yasuhiko Ohta
- Laboratory of Experimental Animals, Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, Koyama, Tottori 680-8553, Japan
| | - Atsuko Yamaguchi
- Faculty of Fisheries, Nagasaki University, Nagasaki, Nagasaki 852-8521, Japan
| | - Hiroaki Shiraishi
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Toshihiro Horiguchi
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
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Kodama K, Waku M, Sone R, Miyawaki D, Ishida T, Akatsuka T, Horiguchi T. Ontogenetic and temperature-dependent changes in tolerance to hypoxia and hydrogen sulfide during the early life stages of the Manila clam Ruditapes philippinarum. MARINE ENVIRONMENTAL RESEARCH 2018; 137:177-187. [PMID: 29325692 DOI: 10.1016/j.marenvres.2017.12.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 12/28/2017] [Accepted: 12/28/2017] [Indexed: 06/07/2023]
Abstract
Wind-induced upwelling of hypoxic waters containing hydrogen sulfide (H2S) sometimes causes mass mortalities of aquatic organisms inhabiting coastal areas, including the hypoxia-tolerant Manila clam Ruditapes philippinarum. We examined the tolerance of Manila clam to H2S under controlled laboratory conditions. Larvae and juveniles obtained by artificial fertilization or from a wild population were exposed to normoxic or to hypoxic water with or without un-ionized H2S (concentrations, 0.2-52.2 mg/L). Twenty-four-hour exposure experiments revealed ontogenetic changes in the clam's tolerance to H2S exposure: tolerance was enhanced from the larval stages to juveniles just after settlement but was attenuated as juveniles grew. Tolerance of larvae and juveniles to H2S exposure weakened as the water temperature rose from 20 to 28 °C. Prolonged 48-h exposure to H2S attenuated the tolerance of juveniles to H2S. Temporary suspension of H2S exposure by 24-h reoxygenation improved the ability of juveniles to withstand repeated H2S exposure.
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Affiliation(s)
- Keita Kodama
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan.
| | - Mitsuyasu Waku
- Fisheries Environment Research Department, Aichi Fisheries Research Institute, Gamagori, Aichi 443-0021, Japan
| | - Ryota Sone
- Fisheries Environment Research Department, Aichi Fisheries Research Institute, Gamagori, Aichi 443-0021, Japan
| | - Dai Miyawaki
- Fisheries Environment Research Department, Aichi Fisheries Research Institute, Gamagori, Aichi 443-0021, Japan
| | - Toshiro Ishida
- Fisheries Environment Research Department, Aichi Fisheries Research Institute, Gamagori, Aichi 443-0021, Japan
| | - Tetsuji Akatsuka
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
| | - Toshihiro Horiguchi
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
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Lee JH, Kodama K, Oyama M, Shiraishi H, Horiguchi T. Effect of water temperature on survival of early-life stages of marbled flounder Pseudopleuronectes yokohamae in Tokyo Bay, Japan. MARINE ENVIRONMENTAL RESEARCH 2017; 128:107-113. [PMID: 27262399 DOI: 10.1016/j.marenvres.2016.05.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 04/08/2016] [Accepted: 05/26/2016] [Indexed: 06/05/2023]
Abstract
We investigated factors that might have disturbed the stock recovery of marbled flounder in Tokyo Bay by focusing on the early life stages. Field surveys in Tokyo Bay from 2006 to 2011 revealed that mature adult biomass increased from 2006 to 2008 and decreased thereafter. Meanwhile, larval and juvenile densities were high in 2006 and 2008 but low in other years. Discrepancies in the yearly trends of these parameters suggest that mortality during life stages between spawning and early larval phases might have affected the abundance of the subsequent life stages. Monthly mean water temperature between January and February, in which hatching and pelagic larvae occur in the bay, was lower in 2006 (8.6 °C) and 2008 (9.6 °C) than was observed in other years (10.4-11.4 °C). Significant negative correlation between water temperature and larval density implies that mortality during pre- and post-larval stages would be higher in warmer winter years (>10 °C). To test this hypothesis, we examined the effects of water temperature on mortality and development in egg and larval stages under controlled laboratory conditions. Hatching rate was high in a water temperature range of 9.2-12.7 °C (66.6-82.5%), whereas it decreased in cooler (3.7% at 5.9 °C) or warmer (33.9% at 14.8 °C) conditions. Meanwhile, days from fertilization to hatching, size of larvae at hatching and survival rate of larvae after 18 d from hatching were monotonically and significantly decreased as water temperature was elevated. Combined evidence of the field and laboratory studies suggests that a warmer reproductive season (>10 °C) might induce mortalities of marbled flounder larvae in Tokyo Bay.
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Affiliation(s)
- Jeong-Hoon Lee
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan
| | - Keita Kodama
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan.
| | - Masaaki Oyama
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan
| | - Hiroaki Shiraishi
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan
| | - Toshihiro Horiguchi
- Center for Health and Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan
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Briggs KB, Craig JK, Shivarudrappa S, Richards TM. Macrobenthos and megabenthos responses to long-term, large-scale hypoxia on the Louisiana continental shelf. MARINE ENVIRONMENTAL RESEARCH 2017; 123:38-52. [PMID: 27912074 DOI: 10.1016/j.marenvres.2016.11.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 11/21/2016] [Accepted: 11/21/2016] [Indexed: 06/06/2023]
Abstract
The macrobenthos and megabenthos responses to long-term, recurring hypoxia on the Louisiana continental shelf were compared at four locations with different historical (2000-2010) episodes of annual exposure to bottom-water hypoxia. Measurements of abundance, biomass, species diversity, and community composition of the two size classes of benthos suggested that the macrobenthic response is driven chiefly by tolerance to hypoxia, whereas the megabenthic response was affected by the ability to migrate and the availability/unavailability of macrobenthos prey at the sediment surface. The site exposed to the historically lowest average bottom-water dissolved oxygen (BWDO) concentration exhibited the lowest species diversity for macrobenthos and the highest species diversity for megabenthos, exemplifying the differential effects of hypoxia on different size classes. The high diversity and smaller average size of the megabenthos at the lowest DO site was due to high abundance of invertebrates and a preponderance of small, less vagile fishes that appeared to remain in the area after larger dominant sciaenids had presumably emigrated. The average size and the depth of habitation in the sediment of macrobenthos prey may have also influenced the abundance and biomass of megabenthos foragers.
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Affiliation(s)
- Kevin B Briggs
- Seafloor Sciences Branch, Naval Research Laboratory, Stennis Space Center, MS 39529, USA.
| | - J Kevin Craig
- Southeast Fisheries Science Center, National Marine Fisheries Service, Beaufort Laboratory, Beaufort, NC 28516, USA
| | - S Shivarudrappa
- Louisiana Universities Marine Consortium, 8124 Highway 56, Chauvin, LA 70344, USA
| | - T M Richards
- Marine Biology Department, Texas A&M University at Galveston, Galveston, TX 77554, USA
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Rathnayake RMLD, Sugahara S, Maki H, Kanaya G, Seike Y, Satoh H. High spatial resolution analysis of the distribution of sulfate reduction and sulfide oxidation in hypoxic sediment in a eutrophic estuary. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:418-426. [PMID: 28112669 DOI: 10.2166/wst.2016.516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Bottom hypoxia and consequential hydrogen sulfide (H2S) release from sediment in eutrophic estuaries is a major global environmental issue. We investigated dissolved oxygen, pH and H2S concentration profiles with microsensors and by sectioning sediment cores followed by colorimetric analysis. The results of these analyses were then compared with the physicochemical properties of the bottom water and sediment samples to determine their relationships with H2S production in sediment. High organic matter and fine particle composition of the sediment reduced the oxidation-reduction potential, stimulating H2S production. Use of a microsensor enabled measurement of H2S concentration profiles with submillimetre resolution, whereas the conventional sediment-sectioning method gave H2S measurements with a spatial resolution of 10 mm. Furthermore, microsensor measurements revealed H2S consumption occurring at the sediment surface in both the microbial mat and the sediment anoxic layer, which were not observed with sectioning. This H2S consumption prevented H2S release into the overlying water. However, the microsensor measurements had the potential to underestimate H2S concentrations. We propose that a combination of several techniques to measure microbial activity and determine its relationships with physicochemical properties of the sediment is essential to understanding the sulfur cycle under hypoxic conditions in eutrophic sediments.
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Affiliation(s)
| | - Shogo Sugahara
- Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Hideaki Maki
- National Institute for Environmental Studies (NIES), 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Gen Kanaya
- National Institute for Environmental Studies (NIES), 16-2, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yasushi Seike
- Interdisciplinary Faculty of Science and Engineering, Shimane University, Matsue, Shimane 690-8504, Japan
| | - Hisashi Satoh
- Division of Environmental Engineering, Faculty of Engineering, Hokkaido University, North-13, West-8, Sapporo 060-8628, Japan E-mail:
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Ruocco N, Varrella S, Romano G, Ianora A, Bentley MG, Somma D, Leonardi A, Mellone S, Zuppa A, Costantini M. Diatom-derived oxylipins induce cell death in sea urchin embryos activating caspase-8 and caspase 3/7. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 176:128-140. [PMID: 27130972 DOI: 10.1016/j.aquatox.2016.04.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 04/05/2016] [Accepted: 04/13/2016] [Indexed: 06/05/2023]
Abstract
Diatoms are an important class of unicellular algae that produce bioactive secondary metabolites with cytotoxic activity collectively termed oxylipins, including polyunsaturated aldehydes (PUAs), hydroxyacids (HEPEs), oxo-acids and epoxyalcohols. Previous results showed that at higher concentrations, the PUA decadienal induced apoptosis on copepods and sea urchin embryos via caspase-3 activation; at lower concentrations decadienal affected the expression levels of the caspase-8 gene in embryos of the sea urchin Paracentrotus lividus. In the present work, we studied the effects of other common oxylipins produced by diatoms: two PUAs (heptadienal and octadienal) and four hydroxyacids (5-, 9- 11- and 15-HEPE) on P. lividus cell death and caspase activities. Our results showed that (i) at higher concentrations PUAs and HEPEs induced apoptosis in sea urchin embryos, detected by microscopic observation and through the activation of caspase-3/7 and caspase-8 measured by luminescent assays; (ii) at low concentrations, PUAs and HEPEs affected the expression levels of caspase-8 and caspase-3/7 (isolated for the first time here in P. lividus) genes, detected by Real Time qPCR. These findings have interesting implications from the ecological point of view, given the importance of diatom blooms in nutrient-rich aquatic environments.
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Affiliation(s)
- Nadia Ruocco
- Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Stefano Varrella
- Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Giovanna Romano
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Adrianna Ianora
- Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Matt G Bentley
- Faculty of Science and Technology, C227 Christchurch House, Bournemouth University, Talbot Campus, Poole, UK
| | - Domenico Somma
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy
| | - Antonio Leonardi
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università di Napoli Federico II, Napoli, Italy
| | - Stefano Mellone
- Istituto di Endocrinologia e Oncologia Sperimentale, CNR, Napoli, Italy
| | - Antonio Zuppa
- Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy
| | - Maria Costantini
- Department of Biology and Evolution of Marine Organisms, Stazione Zoologica Anton Dohrn, Villa Comunale, 80121 Napoli, Italy.
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Song XY, Liu HX, Zhong Y, Tan YH, Qin G, Li KZ, Shen PP, Huang LM, Wang YS. Bacterial growth efficiency in a partly eutrophicated bay of South China Sea: Implication for anthropogenic impacts and potential hypoxia events. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:1529-1539. [PMID: 26024618 DOI: 10.1007/s10646-015-1497-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/20/2015] [Indexed: 06/04/2023]
Abstract
Bacterial metabolism plays a dual role [bacterial production (BP) and bacterial respiration (BR)] in the aquatic ecosystem and potentially leads to hypoxia in the coastal eutrophic area. Bacterial growth efficiency (BGE) is an important index showing the contribution of bacterial metabolism to marine biological production and carbon budget in the pelagic ecosystem. In this study, the spatial and seasonal variety as well as diurnal variation dynamics of BGE and associated ecological characteristics were investigated in a partly eutrophicated subtropical bay (the Daya Bay) located in the northern South China Sea. Furthermore, the relationship between bacterial metabolism and potential hypoxia event was analyzed. The average BGE was 0.14 and 0.22 in summer and winter, respectively, which was lower than the mean value ever reported in other coastal and estuarine waters. The diurnal variations of BGE and BP were widely fluctuated in the Daya Bay, with approximately 3-8 fold variation of BP and 2-3 fold variation of BR in different seasons, suggesting the importance of short-term ecological dynamics on evaluating the long-term ecological processes in the coastal waters. BR was the predominant contributor to the bacterial carbon demand; however, the variation of BGE was controlled by BP in both seasons. BGE was always high in the near-shore waters with higher eutrophic level and more active BP and BR. The bacterial metabolism could deplete dissolved oxygen (DO) in the Daya bay within about 9 days when the water body was enclosed and photosynthesis was prohibited. Therefore, low DO concentration and potential hypoxia was more likely to be found in the near-shore waters of the Daya Bay in summer, since the water was stratified and enclosed with poor water exchange capacity in this area. While in winter, hypoxia seldom occurred due to vertical mixing throughout the water column. Further biological-physical coupling research is recommended to find out the detailed formation mechanism of hypoxia in the bay, and to predict the potential hypoxia events and their environmental impacts in the future.
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Affiliation(s)
- Xing-Yu Song
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Science, Shenzhen, 518121, China.
| | - Hua-Xue Liu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- South China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, Guangzhou, 510300, China
| | - Yu Zhong
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Science, Shenzhen, 518121, China
| | - Ye-Hui Tan
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Geng Qin
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Kai-Zhi Li
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Ping-Ping Shen
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Liang-Min Huang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
- Daya Bay Marine Biology Research Station, Chinese Academy of Science, Shenzhen, 518121, China
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10
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Kanaya G, Nakamura Y, Koizumi T, Yamada K. Seasonal changes in infaunal community structure in a hypertrophic brackish canal: Effects of hypoxia, sulfide, and predator-prey interaction. MARINE ENVIRONMENTAL RESEARCH 2015; 108:14-23. [PMID: 25925266 DOI: 10.1016/j.marenvres.2015.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 04/16/2015] [Accepted: 04/19/2015] [Indexed: 06/04/2023]
Abstract
We conducted a one-year survey of macrozoobenthic community structure at 5 stations in a eutrophic canal in inner Tokyo Bay, focusing on the impacts of hypoxia, sediment H2S, and species interaction in the littoral soft-bottom habitats. Complete defaunation or decreasing density of less-tolerant taxa occurred under hypoxia during warmer months, especially at subtidal or sulfidic stations; this was followed by rapid recolonization by opportunistic polychaetes in fall-winter. Sedimentary H2S increased the mortality of macroinvertebrates under hypoxia or delayed population recovery during recolonization. The density of several polychaetes (e.g., Pseudopolydora reticulata) declined in winter, coincident with immigration of the predator Armandia lanceolata. This suggests that absence of A. lanceolata under moderate hypoxia enabled the proliferation of prey taxa. We conclude that oxygen concentration, sediment H2S, and hypoxia-induced changes in species interactions are potential drivers for spatiotemporal changes in macrozoobenthic assemblage structure in hypoxia-prone soft-bottom communities.
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Affiliation(s)
- Gen Kanaya
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
| | - Yasuo Nakamura
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Tomoyoshi Koizumi
- Nihon Mikuniya Corporation, 3-25-10 Mizonokuchi, Takatsu, Kawasaki, Kanagawa 213-0001, Japan
| | - Katsumasa Yamada
- National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan; Seikai National Fisheries Research Institute, FRA, Nagasaki 851-2213, Japan
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11
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Kodama K, Tajima Y, Shimizu T, Ohata S, Shiraishi H, Horiguchi T. Disturbance of recruitment success of mantis shrimp in Tokyo Bay associated with effects of hypoxia on the early life history. MARINE POLLUTION BULLETIN 2014; 85:433-438. [PMID: 24793777 DOI: 10.1016/j.marpolbul.2014.04.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 04/06/2014] [Accepted: 04/10/2014] [Indexed: 06/03/2023]
Abstract
We investigated effects of severe hypoxia (dissolved oxygen <1 ml l(-1)) on recruitment of mantis shrimp Oratosquilla oratoria in Tokyo Bay. Ten-year field surveys were conducted to examine quantitative relationships in annual mean densities of larvae and juveniles, and spatial distribution of juveniles and severe hypoxia. There was no significant correlation between annual mean densities of larvae and juveniles, suggesting that mortality during larval or juvenile stages varies among years, which might have regulated abundance of young-of-the-year juveniles. Juvenile density was low in the severely hypoxic area, implying that hypoxia could affect survivals and spatial distribution of juveniles. Meanwhile, there are yearly fluctuations in juvenile density in normoxic areas of both northern and southern part of the bay. This evidence suggests that abundance of post-settled juveniles might have been determined by not only effects of hypoxia, but also other factors influencing mortality during the early life stages.
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Affiliation(s)
- Keita Kodama
- Center for Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan.
| | - Yoshihiro Tajima
- Kanagawa Prefectural Fisheries Technology Center, Miura, Kanagawa 238-0237, Japan
| | - Takamichi Shimizu
- Kanagawa Prefectural Fisheries Technology Center, Miura, Kanagawa 238-0237, Japan
| | - Satoshi Ohata
- Tokyo Bay Fisheries Laboratory, Chiba Prefectural Fisheries Research Center, Futtsu, Chiba 293-0042, Japan
| | - Hiroaki Shiraishi
- Center for Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
| | - Toshihiro Horiguchi
- Center for Environmental Risk Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
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12
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Kodama K, Lee JH, Shiraishi H, Horiguchi T. Changes in growth and reproductive traits of dragonet Callionymus valenciennei in Tokyo Bay, concurrent with decrease in stock size. MARINE ENVIRONMENTAL RESEARCH 2014; 93:23-30. [PMID: 23998795 DOI: 10.1016/j.marenvres.2013.08.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2013] [Revised: 07/29/2013] [Accepted: 08/07/2013] [Indexed: 06/02/2023]
Abstract
We examined changes in the growth and reproductive traits of dragonet Callionymus valenciennei concurrent with decrease in stock size in Tokyo Bay. Stock size in mid 2000s decreased to 14% of that recorded in early 1990s. The minimum standard length at which dragonet attain gonadal maturation was smaller in 2000s (4.8 cm) compared to that in 1990s (6.0 cm). In addition, timing of the onset of the first spawning became earlier in 2000s (starting from spring) than that in 1990s (from summer). We also found significant changes in growth for both sexes from 1990s to 2000s; growth of dragonet after they attained sexual maturation showed a significant decrease in 2000s against that in 1990s. Changes in the life history traits may reflect trade-off for allocating available energy resource to reproduction rather than to somatic growth under limited prey abundance for enhancing a chance for stock recovery. However, these changes in the life history traits might have not led to the resilience of the population due to negative effects of hypoxia on settlement of larvae from the spring spawning season.
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Affiliation(s)
- Keita Kodama
- Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
| | - Jeong-Hoon Lee
- Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Hiroaki Shiraishi
- Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Toshihiro Horiguchi
- Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan
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13
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Matabos M, Tunnicliffe V, Juniper SK, Dean C. A year in hypoxia: epibenthic community responses to severe oxygen deficit at a subsea observatory in a coastal inlet. PLoS One 2012; 7:e45626. [PMID: 23029145 PMCID: PMC3446942 DOI: 10.1371/journal.pone.0045626] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 08/20/2012] [Indexed: 11/18/2022] Open
Abstract
Changes in ocean ventilation driven by climate change result in loss of oxygen in the open ocean that, in turn, affects coastal areas in upwelling zones such as the northeast Pacific. Saanich Inlet, on the west coast of Canada, is a natural seasonally hypoxic fjord where certain continental shelf species occur in extreme hypoxia. One study site on the VENUS cabled subsea network is located in the hypoxic zone at 104 m depth. Photographs of the same 5 m(2) area were taken with a remotely-controlled still camera every 2/3 days between October 6(th) 2009 and October 18(th) 2010 and examined for community composition, species behaviour and microbial mat features. Instruments located on a near-by platform provided high-resolution measurements of environmental variables. We applied multivariate ordination methods and a principal coordinate analysis of neighbour matrices to determine temporal structures in our dataset. Responses to seasonal hypoxia (0.1-1.27 ml/l) and its high variability on short time-scale (hours) varied among species, and their life stages. During extreme hypoxia, microbial mats developed then disappeared as a hippolytid shrimp, Spirontocaris sica, appeared in high densities (200 m(-2)) despite oxygen below 0.2 ml/l. The slender sole Lyopsetta exilis was abundant in severe hypoxia and diminished as oxygen increased in the summer. This planktivore may be responding to changes in the depth of the diurnal migration of zooplankton. While the squat lobster Munida quadrispina was common at all times, juveniles disappeared in fluctuating conditions. Despite low oxygen conditions, animal densities were high indicating that the risk from hypoxia is balanced by factors such as food availability and escape from less tolerant predators. As hypoxia increases on the continental shelf, we expect benthic communities to become dominated by low diversity, hypoxia-tolerant species of low commercial significance.
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Affiliation(s)
- Marjolaine Matabos
- School of Earth and Ocean Sciences, University of Victoria, Victoria, BC, Canada.
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14
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Kodama K, Rahman MS, Horiguchi T, Thomas P. Upregulation of hypoxia-inducible factor (HIF)-1α and HIF-2α mRNA levels in dragonet Callionymus valenciennei exposed to environmental hypoxia in Tokyo Bay. MARINE POLLUTION BULLETIN 2012; 64:1339-1347. [PMID: 22683105 DOI: 10.1016/j.marpolbul.2012.05.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 05/01/2012] [Accepted: 05/05/2012] [Indexed: 06/01/2023]
Abstract
There is an urgent need to develop reliable biomarkers of environmental hypoxia exposure in marine organisms in order to assess the ecological impacts of the marked increase in coastal hypoxia worldwide. Full-length hypoxia-inducible factor HIF-1α and HIF-2α cDNAs were cloned and characterized from dragonet Callionymus valenciennei, a representative epibenthic teleost inhabiting hypoxic areas in Tokyo Bay, to evaluate the potential utility of their transcript levels as biomarkers of environmental hypoxia exposure. HIF-1α and HIF-2α transcript levels in the livers of dragonet collected from hypoxic sites in Tokyo Bay were increased several-fold over those collected from nonhypoxic areas. Further, HIF-1α and HIF-2α mRNA levels were increased in dragonet livers after 7 days exposure to hypoxia in a controlled laboratory experiment, and they declined to control levels within 24h of restoration to normoxic conditions. Our findings suggest HIF-1α and HIF-2α transcript levels are potentially useful biomarkers of environmental hypoxia exposure.
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Affiliation(s)
- Keita Kodama
- National Institute for Environmental Studies, Center for Environmental Risk Research, Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
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15
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Kodama K, Lee JH, Oyama M, Shiraishi H, Horiguchi T. Disturbance of benthic macrofauna in relation to hypoxia and organic enrichment in a eutrophic coastal bay. MARINE ENVIRONMENTAL RESEARCH 2012; 76:80-89. [PMID: 21880357 DOI: 10.1016/j.marenvres.2011.08.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 08/09/2011] [Accepted: 08/12/2011] [Indexed: 05/31/2023]
Abstract
This study demonstrated the spatiotemporal patterns of the environmental conditions and benthic macrofauna in Tokyo Bay, Japan, and investigated the factors causing disturbances in the assemblage structure. In the north-central areas, the density and species diversity of the macrobenthos was low. Although hypoxia appeared in July, defaunation occurred in August. The delayed defaunation and recolonization soon after the abatement of hypoxia were attributed to several polychaete and bivalve species that were tolerant to the hypoxic environment. In the southeastern areas, however, the density and species diversity of the macrobenthos was high throughout the year, and no defaunation was recorded. Multivariate analyses showed that the disturbance in the macrofauna correlated with organic enrichment in the sediment and bottom-water hypoxia. There is a concern about further impairment of the macrofauna in the bay due to the expansion of sediment with high levels of organic matter towards the southern regions that could cause hypoxia and subsequent defaunation.
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Affiliation(s)
- Keita Kodama
- Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
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16
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Marrone V, Piscopo M, Romano G, Ianora A, Palumbo A, Costantini M. Defensome against toxic diatom aldehydes in the sea urchin Paracentrotus lividus. PLoS One 2012; 7:e31750. [PMID: 22363721 PMCID: PMC3282763 DOI: 10.1371/journal.pone.0031750] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2011] [Accepted: 01/12/2012] [Indexed: 12/30/2022] Open
Abstract
Many diatom species produce polyunsaturated aldehydes, such as decadienal, which compromise embryonic and larval development in benthic organisms. Here newly fertilized Paracentrotus lividus sea urchins were exposed to low concentration of decadienal and the expression levels of sixteen genes, implicated in a broad range of functional responses, were followed by Real Time qPCR in order to identify potential decadienal targets. We show that at low decadienal concentrations the sea urchin Paracentrotus lividus places in motion different classes of genes to defend itself against this toxic aldehyde, activating hsp60 and two proteases, hat and BP10, at the blastula stage and hsp56 and several other genes (14-3-3ε, p38 MAPK, MTase, and GS) at the prism stage. At this latter stage all genes involved in skeletogenesis (Nec, uni, SM50 and SM30) were also down-expressed, following developmental abnormalities that mainly affected skeleton morphogenesis. Moreover, sea urchin embryos treated with increasing concentrations of decadienal revealed a dose-dependent response of activated target genes. Finally, we suggest that this orchestrated defense system against decadienal represents part of the chemical defensome of P. lividus affording protection from environmental toxicants.
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Affiliation(s)
- Vincenzo Marrone
- Laboratory of Cellular and Developmental Biology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Marina Piscopo
- Department of Structural and Functional Biology, University of Naples Federico II, Naples, Italy
| | - Giovanna Romano
- Laboratory of Functional and Evolutionary Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Adrianna Ianora
- Laboratory of Functional and Evolutionary Ecology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Anna Palumbo
- Laboratory of Cellular and Developmental Biology, Stazione Zoologica Anton Dohrn, Naples, Italy
| | - Maria Costantini
- Laboratory of Cellular and Developmental Biology, Stazione Zoologica Anton Dohrn, Naples, Italy
- * E-mail:
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Kodama K, Horiguchi T. Effects of hypoxia on benthic organisms in Tokyo Bay, Japan: a review. MARINE POLLUTION BULLETIN 2011; 63:215-220. [PMID: 21561630 DOI: 10.1016/j.marpolbul.2011.04.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Revised: 03/10/2011] [Accepted: 04/12/2011] [Indexed: 05/30/2023]
Abstract
Bottom hypoxia (dissolved oxygen concentration ≤2 ml l(-1)) from anthropogenic eutrophication is a growing global concern. Here, we summarized characteristics of hypoxia and its effects on benthic organisms in Tokyo Bay. Despite recent decreases in nutrient inputs, hypoxia has been increasing in duration and spatial extent, suggesting that the substantial loss of tidal flats from reclamation is contributing to a decrease in the ability of Tokyo Bay to recycle nutrients. Hypoxia develops in the central to northern part of the bay and persists from spring to autumn, causing defaunation of benthic organisms. After the abatement of hypoxia in autumn, the defaunated area is recolonized, either through migration or larval settlement. Some megabenthic species with a spawning peak in spring and summer experience failure of larval settlement, which is probably due to hypoxia. The adverse effects of hypoxia are an impediment to recovery of benthic organisms in Tokyo Bay.
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Affiliation(s)
- Keita Kodama
- Center for Environmental Risk Research, National Institute for Environmental Studies, Onogawa, Tsukuba, Ibaraki 305-8506, Japan.
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