原産のオイスターメタポポレーションの前例のない回復です
David M Schulte1, Russell P Burke, Romuald N Lipcius
1Department of Fisheries Science, Virginia Institute of Marine Science, The College of William and Mary, Gloucester Point, VA 23062, USA.
Science (New York, N.Y.)
|August 1, 2009
まとめ
オイスターサンゴ礁を高浮き構造で復元することで,大きなオイスターメタポレーションが成功しました. この生態学的回復は,ネイティブオイスター集団の持続と生態系の回復のための実行可能な戦略を示しています.
科学分野:
- マリン・バイオロジーの海洋生物学
- 復元エコロジー 復元エコロジー
- バイバルブ養殖の水産物です.
背景:
- 重要な生態系エンジニアであるネイティブオイスターの人口は,過剰漁獲と生息地の喪失のために,世界的に減少しています.
- 以前の修復の試みは課題に直面し,革新的なアプローチが必要になりました.
研究 の 目的:
- 異なるネイティブオイスターサンゴ礁の修復デザインの有効性を評価する.
- 回復したのメタポポレーションの長期的な生存可能性と成功を評価する.
主な方法:
- 大規模 (35ヘクタール) のフィールド実験は,バージニア州グレート・ウィコミコ川の9つの聖域で行われました.
- 3つのリーフタイプが構築されました:高地形,低地形,および復元されていないコントロール.
- オイスター群のサンプリングは,2007年と2009年に実施され,密度,募集,サンゴ礁の増殖を評価した.
主要な成果:
- さまざまな年齢層にわたる1,850万個のオイスターの繁盛するメタポポレーションが確立されました.
- オイスター密度は,低浮きサンゴ礁と比較して,高浮きサンゴ礁では著しく高かった (4倍).
- 幼生の増殖とサンゴ礁の増殖は,の密度と正の相関関係があり,集団の持続性を支持しています.
結論:
- ハイリリーフのリーフ構造は,ネイティブオイスターの回復を成功させるために不可欠です.
- この大規模な修復作業は,世界最大のネイティブ・オイスター・メタポポレーションを表しています.
- この発見は,生態学的回復を,地元のオイスター種とその生態学的機能を回復するための効果的な方法として検証しています.
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