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Threats to Biodiversity01:50

Threats to Biodiversity

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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...
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Ecological Disturbance02:26

Ecological Disturbance

17.4K
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.
17.4K
Conservation of Small Populations02:04

Conservation of Small Populations

13.3K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
13.3K
Global Climate Change01:50

Global Climate Change

24.7K
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.
24.7K
Ecological Succession02:17

Ecological Succession

17.6K
Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
17.6K
The Sulfur Cycle01:22

The Sulfur Cycle

45.8K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
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Updated: Aug 19, 2025

Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry
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Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry

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シベリアを炎上させたのは何?

Gabriela Schaepman-Strub1, Jin-Soo Kim2

  • 1Department of Evolutionary Biology and Environmental Studies, University of Zürich, Zürich, Switzerland.

Science (New York, N.Y.)
|December 1, 2022
PubMed
まとめ

2019年から2021年までの間に極度の北極火災が発生した. これらの現象は 変化する気流と 通常より早い雪の融解によって引き起こされ 北極地域に影響を与えました

科学分野:

  • 北極環境科学
  • 大気科学
  • 気候変動に関する研究

背景:

  • 北極地域は急速な環境変化を経験しています.
  • 北極の生態系に 深刻な影響を及ぼしています
  • 極端な火災の原因を理解することは 極めて重要です

研究 の 目的:

  • 2019年から2021年までの極度の北極火災に寄与する主な要因を調査する.
  • 大気循環と融雪パターンの役割を分析する.

主な方法:

  • 空気流のパターンを含む気象データの分析.
  • 衛星画像を用いた雪融解のタイミングと範囲の調査
  • 気候変数と火災発生の相関分析

主要な成果:

  • 空気の流動パターンの変化が 重要な要因と判明した.
  • 早期の雪融解により 燃料の利用可能性と火災の危険性が著しく高まりました
  • これらの要因と極端な火災活動との間に強い関連が確立されました.

結論:

  • 大気と冷凍圏の変化は 北極の火災状態を調整する上で 極めて重要です

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  • 気候による極端な出来事に対する 北極の脆弱性を強調しています
  • 気候変動のせいで 将来の北極の火災リスクは 増加する可能性があります