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Responses to Drought and Flooding02:41

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
Threats to Biodiversity01:50

Threats to Biodiversity

There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
Adaptations that Reduce Water Loss01:57

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Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
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In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

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Updated: Jun 4, 2026

Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce (Lactuca sativa) Germplasm Collections
06:35

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Published on: April 17, 2015

2010年のアマゾン干ばつ.

Simon L Lewis1, Paulo M Brando, Oliver L Phillips

  • 1School of Geography, University of Leeds, Leeds LS2 9JT, UK. s.l.lewis@leeds.ac.uk

Science (New York, N.Y.)
|February 5, 2011
PubMed
まとめ
この要約は機械生成です。

2010年のアマゾンの干ばつが,2005年の干ばつよりも大きな面積に影響を及ぼし,木々の死から推定22億トンの炭素排出を引き起こした. この分析では,衛星による降雨データを用いて,2つの主要な干ばつを比較しました.

さらに関連する動画

The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees
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The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees

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関連する実験動画

Last Updated: Jun 4, 2026

Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce (Lactuca sativa) Germplasm Collections
06:35

Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce (Lactuca sativa) Germplasm Collections

Published on: April 17, 2015

The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees
08:31

The Calibration and Use of Capacitance Sensors to Monitor Stem Water Content in Trees

Published on: December 27, 2017

科学分野:

  • 環境科学 環境科学
  • 気候科学 気候科学
  • エコロジー エコロジー エコロジー

背景:

  • アマゾニアは,2005年と2010年に深刻な干ばつを経験しました.
  • 2010年の乾季は,アマゾンの盆地全体で,広範囲にわたる低雨量を示した.
  • 2010年の干ばつ状態は,2005年の干ばつと類似点を示した.

研究 の 目的:

  • 2005年と2010年のアマゾン干ばつによる地域規模と影響を比較する.
  • アマゾンの干ばつによる木々の死因による炭素排出量を推定する.
  • 衛星データを用いてアマゾンの乾季の降雨の動向を分析する.

主な方法:

  • 衛星による10年間の降雨データ (2000~2010年) の分析.
  • 干ばつ重さを定量化するために標準化された降雨異常の計算.
  • 2010年の炭素排出量を予測するために,2005年の干ばつへの対応関係の抽出.

主要な成果:

  • 2010年,アマゾンの57%は乾季の降雨量が少なく,2005年の37%と比較して減少した.
  • 2010年の干ばつが,2.2 x 10^15グラムの炭素排出を引き起こすと予測されています.
  • 2005年の干ばつが,推定1.6 x 10^15グラムの炭素排出をもたらした.

結論:

  • 2010年のアマゾンの干ばつが,2005年の干ばつよりも広範囲でした.
  • 干ばつによる木の死亡は,アマゾンの炭素排出量の重要な源である.
  • アマゾンの降雨量と森林への対応の継続的なモニタリングは,気候変動の影響を理解するために不可欠です.