Grant-in-Aid for Scientific Research -

Stability and responses to disturbances of scleractinia communities among Nansei Islands

Grant-in-Aid for Scientific Research(C)

Project Year: 2018.04  -  2021.03 

Investigator(s): NAKAMURA Takashi 

Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

　View Summary

Based on the dive surveys at more than 100 sites around the Islands of Yakushima, Amami, Yoron, Okinawa, Kerama, Kume, Tarama and Sekisei lagoon during the 3 years of research, coral communities at the Southern Ryukyu area are severely damaged by major disturbance of 2016 mass bleaching event. There is almost no recovery detected among these damaged reefs in the area. On the contrary, the coral communities at Middle Ryukyu to Northern Ryukyu area showed consistent stable or increasing pattern of coral cover with stable recruitments during the period. This may suggest that the increasing trend of variation in coral community structure among Southern, Middle and Northern Ryukyu area. In addition, there are significant differences in micro plastics contamination of sandy bottoms among Yaeyama, Tarama, Okinawa and Kerama area.

Stability and responses to disturbances of scleractinia communities among Nansei Islands

Grant-in-Aid for Scientific Research(C)

Project Year: 2018.04  -  2021.03 

Investigator(s): NAKAMURA Takashi 

Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

　View Summary

Based on the dive surveys at more than 100 sites around the Islands of Yakushima, Amami, Yoron, Okinawa, Kerama, Kume, Tarama and Sekisei lagoon during the 3 years of research, coral communities at the Southern Ryukyu area are severely damaged by major disturbance of 2016 mass bleaching event. There is almost no recovery detected among these damaged reefs in the area. On the contrary, the coral communities at Middle Ryukyu to Northern Ryukyu area showed consistent stable or increasing pattern of coral cover with stable recruitments during the period. This may suggest that the increasing trend of variation in coral community structure among Southern, Middle and Northern Ryukyu area. In addition, there are significant differences in micro plastics contamination of sandy bottoms among Yaeyama, Tarama, Okinawa and Kerama area.

Stability and responses to disturbances of scleractinia communities among Nansei Islands

Grant-in-Aid for Scientific Research(C)

Project Year: 2018.04  -  2021.03 

Investigator(s): NAKAMURA Takashi 

Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

　View Summary

Based on the dive surveys at more than 100 sites around the Islands of Yakushima, Amami, Yoron, Okinawa, Kerama, Kume, Tarama and Sekisei lagoon during the 3 years of research, coral communities at the Southern Ryukyu area are severely damaged by major disturbance of 2016 mass bleaching event. There is almost no recovery detected among these damaged reefs in the area. On the contrary, the coral communities at Middle Ryukyu to Northern Ryukyu area showed consistent stable or increasing pattern of coral cover with stable recruitments during the period. This may suggest that the increasing trend of variation in coral community structure among Southern, Middle and Northern Ryukyu area. In addition, there are significant differences in micro plastics contamination of sandy bottoms among Yaeyama, Tarama, Okinawa and Kerama area.

Stability and responses to disturbances of scleractinia communities among Nansei Islands

Grant-in-Aid for Scientific Research(C)

Project Year: 2018.04  -  2021.03 

Investigator(s): NAKAMURA Takashi 

Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

　View Summary

Based on the dive surveys at more than 100 sites around the Islands of Yakushima, Amami, Yoron, Okinawa, Kerama, Kume, Tarama and Sekisei lagoon during the 3 years of research, coral communities at the Southern Ryukyu area are severely damaged by major disturbance of 2016 mass bleaching event. There is almost no recovery detected among these damaged reefs in the area. On the contrary, the coral communities at Middle Ryukyu to Northern Ryukyu area showed consistent stable or increasing pattern of coral cover with stable recruitments during the period. This may suggest that the increasing trend of variation in coral community structure among Southern, Middle and Northern Ryukyu area. In addition, there are significant differences in micro plastics contamination of sandy bottoms among Yaeyama, Tarama, Okinawa and Kerama area.

Stability and responses to disturbances of scleractinia communities among Nansei Islands

Grant-in-Aid for Scientific Research(C)

Project Year: 2018.04  -  2021.03 

Investigator(s): NAKAMURA Takashi 

Direct: 3,400,000 (YEN)  Overheads: 4,420,000 (YEN)  Total: 1,020,000 (YEN)

　View Summary

Based on the dive surveys at more than 100 sites around the Islands of Yakushima, Amami, Yoron, Okinawa, Kerama, Kume, Tarama and Sekisei lagoon during the 3 years of research, coral communities at the Southern Ryukyu area are severely damaged by major disturbance of 2016 mass bleaching event. There is almost no recovery detected among these damaged reefs in the area. On the contrary, the coral communities at Middle Ryukyu to Northern Ryukyu area showed consistent stable or increasing pattern of coral cover with stable recruitments during the period. This may suggest that the increasing trend of variation in coral community structure among Southern, Middle and Northern Ryukyu area. In addition, there are significant differences in micro plastics contamination of sandy bottoms among Yaeyama, Tarama, Okinawa and Kerama area.

Grant-in-Aid for Scientific Research(B)

Project Year: 2017.04  -  2020.03 

Study on Integrated Coastal Resource Management and Inhabitant Participation Mechanism for Coral Reef Conservation: To Create Management System for Addressing Regional Problem

Grant-in-Aid for Scientific Research(B)

Project Year: 2017.04  -  2020.03 

Direct: 13,200,000 (YEN)  Overheads: 17,160,000 (YEN)  Total: 3,960,000 (YEN)

Study on Integrated Coastal Resource Management and Inhabitant Participation Mechanism for Coral Reef Conservation: To Create Management System for Addressing Regional Problem

Grant-in-Aid for Scientific Research(B)

Project Year: 2017.04  -  2020.03 

Investigator(s): Shinbo Teruyuki 

Direct: 13,200,000 (YEN)  Overheads: 17,160,000 (YEN)  Total: 3,960,000 (YEN)

　View Summary

About the deterioration of coral reef in Yoron Island, Kagoshima Prefecture, by field survey we clarified the current situation of coral reef and those eutrophication, notably accumulated phosphorus in which phosphate accumulates in the calcareous sand of seabed. Then, we found high phosphate concentrations in seawater from accumulated phosphorus clearly inhibit the skeletal formation of coral juveniles and interrupt the recovery of coral reef. And we elucidated the dynamics of chemical fertilizer, which is one of the major factor of eutrophication, by sulfur/nitrogen stable isotope ratio analysis. About marine protected area by community-based management in the Philippine, which is useful to think coral reef conservation in Japan, we investigated the actual situation of residents' participation in MPA management that influences the conservation performance. We clarified the importance of social capital as the trust in the community through fishery household survey by random sampling.

Study on Integrated Coastal Resource Management and Inhabitant Participation Mechanism for Coral Reef Conservation: To Create Management System for Addressing Regional Problem

Grant-in-Aid for Scientific Research(B)

Project Year: 2017.04  -  2020.03 

Investigator(s): Shinbo Teruyuki 

Direct: 13,200,000 (YEN)  Overheads: 17,160,000 (YEN)  Total: 3,960,000 (YEN)

　View Summary

About the deterioration of coral reef in Yoron Island, Kagoshima Prefecture, by field survey we clarified the current situation of coral reef and those eutrophication, notably accumulated phosphorus in which phosphate accumulates in the calcareous sand of seabed. Then, we found high phosphate concentrations in seawater from accumulated phosphorus clearly inhibit the skeletal formation of coral juveniles and interrupt the recovery of coral reef. And we elucidated the dynamics of chemical fertilizer, which is one of the major factor of eutrophication, by sulfur/nitrogen stable isotope ratio analysis. About marine protected area by community-based management in the Philippine, which is useful to think coral reef conservation in Japan, we investigated the actual situation of residents' participation in MPA management that influences the conservation performance. We clarified the importance of social capital as the trust in the community through fishery household survey by random sampling.

Study on Integrated Coastal Resource Management and Inhabitant Participation Mechanism for Coral Reef Conservation: To Create Management System for Addressing Regional Problem

Grant-in-Aid for Scientific Research(B)

Project Year: 2017.04  -  2020.03 

Investigator(s): Shinbo Teruyuki 

Direct: 13,200,000 (YEN)  Overheads: 17,160,000 (YEN)  Total: 3,960,000 (YEN)

　View Summary

About the deterioration of coral reef in Yoron Island, Kagoshima Prefecture, by field survey we clarified the current situation of coral reef and those eutrophication, notably accumulated phosphorus in which phosphate accumulates in the calcareous sand of seabed. Then, we found high phosphate concentrations in seawater from accumulated phosphorus clearly inhibit the skeletal formation of coral juveniles and interrupt the recovery of coral reef. And we elucidated the dynamics of chemical fertilizer, which is one of the major factor of eutrophication, by sulfur/nitrogen stable isotope ratio analysis. About marine protected area by community-based management in the Philippine, which is useful to think coral reef conservation in Japan, we investigated the actual situation of residents' participation in MPA management that influences the conservation performance. We clarified the importance of social capital as the trust in the community through fishery household survey by random sampling.

Study on Integrated Coastal Resource Management and Inhabitant Participation Mechanism for Coral Reef Conservation: To Create Management System for Addressing Regional Problem

Grant-in-Aid for Scientific Research(B)

Project Year: 2017.04  -  2020.03 

Investigator(s): Shinbo Teruyuki 

Direct: 13,200,000 (YEN)  Overheads: 17,160,000 (YEN)  Total: 3,960,000 (YEN)

　View Summary

About the deterioration of coral reef in Yoron Island, Kagoshima Prefecture, by field survey we clarified the current situation of coral reef and those eutrophication, notably accumulated phosphorus in which phosphate accumulates in the calcareous sand of seabed. Then, we found high phosphate concentrations in seawater from accumulated phosphorus clearly inhibit the skeletal formation of coral juveniles and interrupt the recovery of coral reef. And we elucidated the dynamics of chemical fertilizer, which is one of the major factor of eutrophication, by sulfur/nitrogen stable isotope ratio analysis. About marine protected area by community-based management in the Philippine, which is useful to think coral reef conservation in Japan, we investigated the actual situation of residents' participation in MPA management that influences the conservation performance. We clarified the importance of social capital as the trust in the community through fishery household survey by random sampling.

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Investigator(s): Harii Saki 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

　View Summary

Mesophotic Coral Ecosystems are considered as refuges for shallow corals from bleaching and expected to act as a larval source for recovery for shallow reefs. In this study, we examined larval recruitment and adaptation from deep to shallow, genetic structures between depths, and deep environments to reveal shallow reef recovery potential from the mesophotic coral, Seriatopora hystrix. We found that reproductive seasons are shorter with increasing depth, suggesting less opportunity for larval recruitment. The species did not recruit nor survive in shallow water conditions. On the other hand, they recruit mid-water, deep depths or shaded condition in shallow, and partially grew. High genetic diversity was observed in this species for all depths with no clear partitioning of haplotypes among depths/locations. Overall, we suggest that mesophotic larvae of this species may not recruit directly to shallow water, but recruit and recover slowly via mid-water depth as stepping stone.

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Investigator(s): Harii Saki 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

　View Summary

Mesophotic Coral Ecosystems are considered as refuges for shallow corals from bleaching and expected to act as a larval source for recovery for shallow reefs. In this study, we examined larval recruitment and adaptation from deep to shallow, genetic structures between depths, and deep environments to reveal shallow reef recovery potential from the mesophotic coral, Seriatopora hystrix. We found that reproductive seasons are shorter with increasing depth, suggesting less opportunity for larval recruitment. The species did not recruit nor survive in shallow water conditions. On the other hand, they recruit mid-water, deep depths or shaded condition in shallow, and partially grew. High genetic diversity was observed in this species for all depths with no clear partitioning of haplotypes among depths/locations. Overall, we suggest that mesophotic larvae of this species may not recruit directly to shallow water, but recruit and recover slowly via mid-water depth as stepping stone.

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Investigator(s): Harii Saki 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

　View Summary

Mesophotic Coral Ecosystems are considered as refuges for shallow corals from bleaching and expected to act as a larval source for recovery for shallow reefs. In this study, we examined larval recruitment and adaptation from deep to shallow, genetic structures between depths, and deep environments to reveal shallow reef recovery potential from the mesophotic coral, Seriatopora hystrix. We found that reproductive seasons are shorter with increasing depth, suggesting less opportunity for larval recruitment. The species did not recruit nor survive in shallow water conditions. On the other hand, they recruit mid-water, deep depths or shaded condition in shallow, and partially grew. High genetic diversity was observed in this species for all depths with no clear partitioning of haplotypes among depths/locations. Overall, we suggest that mesophotic larvae of this species may not recruit directly to shallow water, but recruit and recover slowly via mid-water depth as stepping stone.

Twilight zone- a key for coral reef recovery: vertical connectivity and depth adaptation of corals

Grant-in-Aid for Scientific Research(A)

Project Year: 2016.04  -  2020.03 

Investigator(s): Harii Saki 

Direct: 31,600,000 (YEN)  Overheads: 41,080,000 (YEN)  Total: 9,480,000 (YEN)

　View Summary

Mesophotic Coral Ecosystems are considered as refuges for shallow corals from bleaching and expected to act as a larval source for recovery for shallow reefs. In this study, we examined larval recruitment and adaptation from deep to shallow, genetic structures between depths, and deep environments to reveal shallow reef recovery potential from the mesophotic coral, Seriatopora hystrix. We found that reproductive seasons are shorter with increasing depth, suggesting less opportunity for larval recruitment. The species did not recruit nor survive in shallow water conditions. On the other hand, they recruit mid-water, deep depths or shaded condition in shallow, and partially grew. High genetic diversity was observed in this species for all depths with no clear partitioning of haplotypes among depths/locations. Overall, we suggest that mesophotic larvae of this species may not recruit directly to shallow water, but recruit and recover slowly via mid-water depth as stepping stone.