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関連する概念動画

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

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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.
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Habitat Fragmentation02:31

Habitat Fragmentation

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Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
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Global Climate Change01:50

Global Climate Change

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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.
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The Colonization of Land02:22

The Colonization of Land

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Changes in the environment of the early Earth drove the evolution of organisms. As prokaryotic organisms in the oceans began to photosynthesize, they produced oxygen. Eventually, oxygen saturated the oceans and entered the air, resulting in an increase in atmospheric oxygen concentration, known as the oxygen revolution approximately 2.3 billion years ago. Therefore, organisms that could use oxygen for cellular respiration had an advantage. More than 1.5 years ago, eukaryotic cells and...
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Ecological Succession02:17

Ecological Succession

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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...
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関連する実験動画

Updated: Jan 14, 2026

Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM
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地上生態系への侵襲の影響:グローバルなパターンと予測要因

Madhav P Thakur1, Zhizhuang Gu2, Mark van Kleunen3,4,5

  • 1Institute of Ecology and Evolution, University of Bern, Bern, Switzerland.

Science (New York, N.Y.)
|October 23, 2025
PubMed
まとめ

生物の侵入は 植物の多様性に悪影響を及ぼし 温室効果ガスの排出量を増加させます 長期にわたる侵略者の存在はこれらの効果を強めるが,土壌の特性への影響は時間とともに減少するかもしれない.

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Last Updated: Jan 14, 2026

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科学分野:

  • エコロジー
  • 環境科学

背景:

  • 生物の侵入は地球環境の変化の主な原動力です
  • 侵入種が生態系に及ぼす影響は 大きく異なります
  • これらの影響を理解することは 保護と管理に不可欠です

研究 の 目的:

  • 地球上の生態系への生物学的侵入の影響に関する世界的な証拠をまとめます.
  • 侵入者の滞在時間などの重要な要因を特定し 侵略の影響を調整します
  • 生態系特性の侵襲の影響の一貫性と持続性を評価する.

主な方法:

  • 775件の研究と2223件の効果サイズを総合したメタ分析.
  • 植物多様性と温室効果ガス排出量への影響の分析
  • 侵入者の滞在時間やその他の生態学的要因の役割の調査.

主要な成果:

  • 侵入植物は 固有の植物の多様性を 一貫して減少させます
  • 侵襲的な植物や動物は 温室効果ガスの排出量を増加させるが 出版のバイアスは認められる.
  • 侵入者の滞在時間が長くなるため,原生生物の多様性への悪影響は増幅されるが,土壌の特性への影響は時間とともに弱まる.

結論:

  • 植物の多様性は 生物学的侵入に対して 持続的に敏感です
  • 侵襲が生態系特性に及ぼす影響は,時間とともに変化し,感度も様々です.
  • 侵入による温室効果ガス排出の理解における潜在的なバイアスに対処するためにさらなる研究が必要です.