大規模な水気気候条件の変化にもかかわらず,生態系の回復力
Guillermo E Ponce Campos1, M Susan Moran, Alfredo Huete
1USDA ARS Southwest Watershed Research, Tucson, Arizona 85719, USA. geponce@gmail.com
Nature
|January 22, 2013
まとめ
生態系は干ばつに対する回復力を発揮し,より乾燥した環境でも水利用効率 (WUE) を維持しています. 低降雨を許容するこのバイオームスケールの能力は,将来の気候変動の影響を予測する鍵です.
科学分野:
- エコロジー エコロジー エコロジー
- 気候科学 気候科学
- バイオジオケミストリー バイオジオケミストリー
背景:
- 気候変動は干ばつ発生頻度と期間を増加させ,地球温暖化と水気気候条件の変化をもたらしています.
- 最近の大規模で温暖な干ばつが,陸上の生態系,炭素のバランス,そして大陸全体の食糧安全保障に影響を与えました.
関連する概念動画
Adaptations that Reduce Water Loss
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.
What is an Ecosystem?
Overview
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.
Ecological Disturbance
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.
Global Climate Change
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
Microbes and Climate Change
Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...


