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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...
Biodiversity and Human Values01:24

Biodiversity and Human Values

Human civilization relies on biodiversity in many ways. Sudden changes in species biodiversity result in environmental changes that can modify weather patterns and therefore human civilizations.
Conservation of Small Populations02:04

Conservation of Small Populations

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 likely to...
What is Conservation Biology?01:57

What is Conservation Biology?

Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
Habitat Fragmentation02:31

Habitat Fragmentation

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.
Conservation of Declining Populations02:07

Conservation of Declining Populations

Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.

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Updated: May 29, 2026

A Simple Planting Technique for Re-establishing Trees Where Frequent Inundation Occurs
04:41

A Simple Planting Technique for Re-establishing Trees Where Frequent Inundation Occurs

Published on: January 26, 2018

原生林は,熱帯の生物多様性を維持する上で代わらないものです.

Luke Gibson1, Tien Ming Lee, Lian Pin Koh

  • 1Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore. lggibson@nus.edu.sg

Nature
|September 16, 2011
PubMed
まとめ
この要約は機械生成です。

人間の土地利用の変化は,熱帯雨林の生物多様性に深刻な影響を及ぼします. 原生林は種の多様性の保全に不可欠であり,劣化した森林は生物多様性の価値が著しく低下している.

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Isolation, Behavioral Identification, and Pathogenicity Assessment of Entomopathogenic Fungi from a Forest Wood Borer
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Isolation, Behavioral Identification, and Pathogenicity Assessment of Entomopathogenic Fungi from a Forest Wood Borer

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04:41

A Simple Planting Technique for Re-establishing Trees Where Frequent Inundation Occurs

Published on: January 26, 2018

Isolation, Behavioral Identification, and Pathogenicity Assessment of Entomopathogenic Fungi from a Forest Wood Borer
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科学分野:

  • エコロジー エコロジー エコロジー
  • 保護生物学の保護生物学
  • 環境科学 環境科学

背景:

  • 森林伐採と劣化を含む,人間によって引き起こされる土地利用の変化は,地球規模の生物多様性にとって重大な脅威となっている.
  • 種多様性のホットスポットである熱帯雨林は,特に農業の拡大,伐採,火災に脆弱である.
  • 劣化,二次性,植林林の増加は,生物多様性を支える能力について懸念を喚起しています.

研究 の 目的:

  • 干渉と土地の改造が熱帯雨林の生物多様性に与える影響に関する世界的な評価を実施する.
  • メタアナリシスアプローチを用いて,様々な形態の森林破壊が種の多様性に及ぼす影響を分析する.
  • 熱帯生物多様性を維持するために,原生林が代替できないかどうかを判断する.

主な方法:

  • 138件の研究のメタ解析が行われ,2,220件の対対比較が行われた.
  • 生物多様性の値は,原生林 (最小限の破壊) と,さまざまな種類の破壊された森林の生物多様性を比較した.
  • 統計的分析では,生息地の構成,孤立,そして干渉以来の時間などの潜在的な混乱要因を考慮した.

主要な成果:

  • 生物多様性の価値は,原生林と比較して,劣化した熱帯雨林では大幅に低下しました.
  • 生物多様性喪失の規模は,地理的地域,分類学的なグループ,生態学的指標,および干渉の種類によって大幅に変化しました.
  • 混同要因を制御した後でさえ,ほとんどの森林の劣化形態は熱帯生物多様性に有害な影響を及ぼしていることが示されました.

結論:

  • 原生林は,熱帯生物多様性の維持に不可欠で,取り替えられないものです.
  • 伐採と火災を含む森林の劣化は,生物多様性の大きな損失につながります.
  • 保護の取り組みは,熱帯原生林の保護と回復を優先すべきです.