温帯雨林の土壌生地化学とバクテリア群に影響を与える
Bonnie G Waring1, Lena Lancastle1, Thomas Bell1
1Georgina Mace Centre for the Living Planet, Department of Life Sciences, Imperial College, London, SL5 7PY England.
まとめ
森林風暴は土壌の性質を変化させ 根のバイオマスを減少させます 土壌の細菌群は これらの障害に対して 回復力を発揮しますが 根の成長の変化は 森林の長期的回復に 影響を及ぼします
科学分野:
- エコロジー
- 林業
- 微生物学
背景:
- 森林の生態系は 嵐や山火事 害虫の蔓延など 様々な障害に直面しています
- 土壌の微生物は 森林の炭素と栄養素の循環に不可欠ですが 干渉に対するその反応は 完全に理解されていません
研究 の 目的:
- 温帯の針葉樹林の土壌細菌群に 激しい風暴が及ぼす影響を調査する
- 風による干渉が土壌の特性,根のバイオマス,そして異なる土壌の区画 (塊,根球,根の組織) の細菌のコミュニティ構造にどのように影響するか評価する.
主な方法:
- イギリスのキエルダー森林を研究し 荒れ果てた森林と風で荒れ果てた森林を比較しました
- 22の土地から土壌と根のサンプルを集め 土壌の炭素,窒素,pH,根のバイオマス,バクテリアのコミュニティ構造を分析しました
- 大量土壌,根球,根の組織から細菌を配列化し,根の微生物の近接性に基づいて影響を区分する.
主要な成果:
- 深刻な干渉は,地殻の覆い,土壌の炭素,微細な根のバイオマス,および土壌のpH値の上昇を示しました.
- 微妙に細菌の多様性に 影響を及ぼしました
- バクテリアの多様性への影響は,大量と根球の土壌サンプル間で異なるものではありませんでした.
結論:
- 土壌バクテリアのコミュニティは,風が吹き込むような地上の干渉に対して相対的なバッファリングを示します.
- 植物の根の成長と炭素循環のパターンの変化は,森林の生態系の回復に長期的な影響を及ぼす可能性があります.
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