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関連する概念動画

Responses to Drought and Flooding02:41

Responses to Drought and Flooding

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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.
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Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

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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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What is Climate?01:16

What is Climate?

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Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
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Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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Light Acquisition02:16

Light Acquisition

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In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
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関連する実験動画

Updated: Jun 5, 2025

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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日々の降雨の変動に対する大規模な植物の感受性

Andrew F Feldman1,2, Alexandra G Konings3, Pierre Gentine4

  • 1Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, USA. andrew.feldman@nasa.gov.

Nature
|December 11, 2024
PubMed
まとめ

地球上の植物の光合成は 降雨量だけでなく 日々の降雨量にも 敏感です 降雨の頻度と強度の変化は 植物の成長と炭素循環に大きな影響を与えます

さらに関連する動画

Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM
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Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands
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Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

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関連する実験動画

Last Updated: Jun 5, 2025

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

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Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM
12:11

Measurement of Leaf Hydraulic Conductance and Stomatal Conductance and Their Responses to Irradiance and Dehydration Using the Evaporative Flux Method EFM

Published on: December 31, 2012

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Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands
00:09

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

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科学分野:

  • 気候科学
  • エコロジー
  • リモートセンシング

背景:

  • 世界的な気候変動により 降雨パターンが変化し 降雨の頻度が減る一方で 降雨量が増加しています
  • 年間降雨総量は安定しているにもかかわらず,陸上の植物の光合成と成長に対する日々の降雨の変動の影響は依然として大きく不確実です.

研究 の 目的:

  • 年間降雨量に関係なく,毎日の降雨の変動に対する地球全体の植物の光合成と成長の感受性を調査する.
  • 毎日降る雨の頻度と強さの変化に対する植物の反応の範囲と大きさを定量化する.

主な方法:

  • 光合成と成長のプロキシとして,衛星ベースの植生指標 (例えば,NDVI,EVI) を利用した.
  • 衛星データを検証する 統合されたフィールド観測
  • 雨量 (頻度,強度) と地球上の植生地表の植生インデックスとの関係を分析した.

主要な成果:

  • 全年スケールの植生指標は,年間降雨量に関係なく,毎日の降雨頻度と強さに著しい感受性を示しています.
  • 植生地の約42%は,毎日の降雨の変動に敏感である.
  • 植生に与える影響は,年間降雨総量の影響とほぼ同じです.

結論:

  • 日々の降雨の変動は,地球上の植物の光合成と成長に影響を与える重要な要因です.
  • 雨天の頻度と強度の予測の変化は,年間降雨の変化を反映し,将来の大きな影響を示唆しています.
  • これらの発見は,地球規模の炭素循環を理解し,変化する気候条件下で食糧安全保障を確保する上で重要な意味を持つ.