Photos are from Ryukyu Shimpo website. The area with the red dot is where the four new types of of seasweed have been discovered. The two white lines are the V-shape plan for a new base, previously agreed between the U.S. and Japan's LDP government. The current DPJ government has expressed their intention to follow through this agreement, where over 80% Okinawans oppose the construction of a new base within the prefecture already saturated with U.S. military bases. The below photograph is those of the four new types of seaweed.
From Asahi Shimbun, July 17
http://www.asahi.com/english/TKY201007160468.html
By TOMOYUKI YAMAMOTO THE ASAHI SHIMBUN
2010/07/17
Four previously unidentified types of seaweed have been found off Henoko in Nago, Okinawa Prefecture, near the likely relocation site for the U.S. Marine Corps Air Station Futenma.
A team led by Hideo Ohba, an assistant professor studying tropical seaweed at the Tokyo University of Marine Science and Technology, discovered four kinds of seaweeds that are believed to be new species.
The team collected samples at about 10 sites, including the Henokozaki district in Oura Bay in March and April. Divers collected samples from the seabed up to 30 meters deep.
Of the five specimens thought to be newly discovered species, four were concentrated on the east coast of the Henokozaki district. One of them, 5 to 6 centimeters high, is of the sea fan family. Another, which is 10 to 25 centimeters high, is of the family of halymenia red algae.
The area is a calm inner bay, but has complex seabed topography. Some areas are 50 meters deep. Team members said this new seaweed adapted to the unusual environment and thrived in the closed inner bay.
Although not yet confirmed, the air base relocation plan is expected to entail filling in this sea area to reclaim the land.
Team members say they are worried that reclaiming the land for the relocation could make their finds fruitless.
"It would be a shame if these seaweeds were extinguished so soon after they were discovered," Oba said.
http://www.asahi.com/english/TKY201007160468.html
By TOMOYUKI YAMAMOTO THE ASAHI SHIMBUN
2010/07/17
Four previously unidentified types of seaweed have been found off Henoko in Nago, Okinawa Prefecture, near the likely relocation site for the U.S. Marine Corps Air Station Futenma.
A team led by Hideo Ohba, an assistant professor studying tropical seaweed at the Tokyo University of Marine Science and Technology, discovered four kinds of seaweeds that are believed to be new species.
The team collected samples at about 10 sites, including the Henokozaki district in Oura Bay in March and April. Divers collected samples from the seabed up to 30 meters deep.
Of the five specimens thought to be newly discovered species, four were concentrated on the east coast of the Henokozaki district. One of them, 5 to 6 centimeters high, is of the sea fan family. Another, which is 10 to 25 centimeters high, is of the family of halymenia red algae.
The area is a calm inner bay, but has complex seabed topography. Some areas are 50 meters deep. Team members said this new seaweed adapted to the unusual environment and thrived in the closed inner bay.
Although not yet confirmed, the air base relocation plan is expected to entail filling in this sea area to reclaim the land.
Team members say they are worried that reclaiming the land for the relocation could make their finds fruitless.
"It would be a shame if these seaweeds were extinguished so soon after they were discovered," Oba said.
辺野古崎に海藻4新種 東京海洋大大葉氏採取
「埋め立てで絶滅」
2010年7月17日 09時38分
http://www.okinawatimes.co.jp/article/2010-07-17_8155/
米軍普天間飛行場の代替施設建設地として日米が合意した名護市辺野古崎の沿岸で、新種と見られる海藻4種が見つかった。東京海洋大学の大葉英雄助教(熱帯海藻学)らが今年3月から4月までに採取、確認した。同海域を埋め立てて滑走路を建設する案が有力視される中、大葉助教は「分布区域が限られている可能性が高く、発見と同時に埋め立てられると絶滅は免れずとても残念だ」と話した。
大葉助教らは辺野古崎沿岸を含む10カ所に潜り、水深10メートルから30メートルで182種の海草・海藻類を採取した。形態を分類した結果、ウミウチワやイソノハナの仲間など、まだ学名がない海藻5種を探し出した。うち1種は大浦湾で見つかった。
辺野古崎周辺は海岸とサンゴ礁の間に50メートル以上の深みがあり、国内でもめずらしい地形だという。サンゴ礁がある太平洋の国々で30年以上調査を続けている大葉助教は「一度に複数(の新種とみられる種)見つかるのは初めて。海藻の宝庫であることは間違いない」と評価した。
また、大葉助教は、国が実施している環境影響評価(アセスメント)について「琉球列島の海藻は季節性があり、毎年7月から12月の間はなくなってしまう特徴がある。アセスはその時期に調査されており、不適切だ」と不備を指摘した。(金城珠代)
「豊かな海証明」市民団体が指摘
名護市辺野古の米軍普天間飛行場の移設予定地で、新種とみられる海藻が4種見つかったことについて、大浦湾などでジュゴンの生態調査を続ける北限のジュゴンを見守る会の鈴木雅子代表は「驚きと同時にやっぱりという思いが強い。辺野古周辺海域は今後、発見が相次いでもおかしくない自然豊かな海だ。(発見は)同海域の生態系の希少性を証明してくれた」と喜んだ。
その上で、「海藻は地味な存在だが生物多様性の観点からもジュゴン同様に保護は重要。県は腰をすえて保護事業に取り組んでほしい」と期待した。
ジュゴンの生態や餌場の海草を調査している日本自然保護協会の大野正人保護プロジェクト部長は「見つかった場所はちょうどV字型滑走路の真下で、大浦湾とシュワブリーフの接点になっている。深い谷間で(潮の)流れが安定、まだ知られていない種が出てきてもおかしくない」と海域の特殊性を強調した。
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