関連する実験動画
Updated: Sep 9, 2025

09:47
Spotting Cheetahs: Identifying Individuals by Their Footprints
Published on: May 1, 2016
14.9K
イランの砂漠地帯における灰狼とペルシャヒョウの生息地の断片化に関する評価
Kamran Almasieh1, Alireza Mohammadi2
1Department of Nature Engineering, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran. almasieh@asnrukh.ac.ir.
Scientific reports
|September 1, 2025
まとめ
道路はイランの グレーオオカミや ペルシャヒョウのような 大型の肉食動物にとって 重要な生息地です 保護の取り組みは,種の生存と接続性を確保するために,道路管理と生息地の保護を統合する必要があります.
科学分野:
- エコロジー
- 保護生物学
- 野生生物管理
背景:
- ハビタットの断片化と道路網は,特に乾燥した地域では,大規模な肉食動物集団に重大な脅威をもたらします.
- 中部イランの乾燥した平原は 住環境の劣化と断片化に直面している 脆弱なグレーオオカミとペルシャヒョウの集団を宿しています
研究 の 目的:
- ハビタットの適性を予測し,灰色のオオカミとペルシャのヒョウの分布の主要な環境要因を特定する.
- 核生息地と接続回廊をマッピングし,保護区 (CA) との重複を評価する.
- 肉食動物の移動と生息地の接続性に対する道路の密度の影響を評価する.
主な方法:
- 生息地の適性予測のための5つのアルゴリズムを組み合わせたアンサンブルモデリングアプローチ.
- コアハビタートとコネクティビティ回廊を特定するための最小コスト分析
- 肉食動物の生息地や通路に関する道路の密度と交差点の分析
主要な成果:
- CAsからの距離,草原の密度,そして水への接近は,両方の種の生息地の適性にとって決定的でした.
- グレーオオカミの3つの主要生息地とペルシャヒョウの2つの生息地が特定され,90%以上が既存のCAと重なり合っている.
- 高密度の道路 (オオカミの場合は80m/km2,ヒョウの場合は152m/km2) が廊下内で発見され,大きな断片化を示しています.
結論:
- 保護区は 核の生息地を含んでいるが 道路のインフラによって 接続性が深刻な脅威にさらされている.
- 中部イランの大型肉食動物保護には,道路の緩和措置と廊下保護を含む統合管理戦略が不可欠です.
さらに関連する動画
関連する概念動画
Habitat Fragmentation
17.9K
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.
17.9K
Conservation of Small Populations
13.5K
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...
13.5K
Distribution and Dispersion
22.4K
To understand intra-specific interactions in populations, scientists measure the spatial arrangement of species individuals. This geographic arrangement is known as the species distribution or dispersion. Highly territorial species exhibit a uniform distribution pattern, in which individuals are spaced at relatively equal distances from one another. Species that are highly tied to particular resources, such as food or shelter, tend to concentrate around those resources, and thus exhibit a...
22.4K
Threats to Biodiversity
22.9K
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...
22.9K
Conservation of Declining Populations
9.7K
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.
9.7K
Predator-Prey Interactions
18.8K
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.
18.8K

