グローバルな気候変動のシナリオの下でのメキシコのファウナの将来の予測
A Townsend Peterson1, Miguel A Ortega-Huerta, Jeremy Bartley
1Natural History Museum, The University of Kansas, Lawrence, Kansas 66045, USA. town@ukans.edu
Nature
|April 12, 2002
まとめ
気候変動は生物多様性に影響を与え,分布的な変化を引き起こします. この研究では,2055年までにメキシコの地域社会で高種の転移が予測され,生態学的破壊が著しいことを示しています.
科学分野:
- エコロジー エコロジー エコロジー
- 気候変動 生物学 生物学
- 生物多様性 科学 科学 生物多様性
背景:
- 世界的な気候変動は,世界中の環境条件を急速に変化させています.
- 生物多様性は本質的に気候と関連しており,気候は種の分布を左右する.
- これまでの研究は,主に単一の種や生態系に焦点を当てており,動物全体に及ぶ気候変動の影響はほとんど調査されていない.
研究 の 目的:
- 気候変動がメキシコの1,870種の分布に及ぼす潜在的な影響を調査する.
- 2055年までに予測される気候変動による動物全体と地域社会レベルの影響を評価する.
- 種の転移の程度と潜在的な生態学的混乱を調査する.
主な方法:
- 遺伝子アルゴリズムを用いたエコニッシュモデルの開発.
- メキシコの1,870種の博物館標本発生データを使用.
- 2055年までの気候表面に生態学的ニッチモデルを投影する.
主要な成果:
- 絶滅と急激な範囲の減少は,個々の種に限られていると予測されています.
- いくつかの地域社会では,種の大幅な転移が予測されており,潜在的に40%を超える可能性があります.
- これらの変化は,コミュニティレベルでの実質的な生態学的混乱を示唆しています.
結論:
- 気候変動は,メキシコの生物多様性のホットスポットで重大な生態学的混乱を引き起こす可能性が高い.
- 広範な絶滅というより,種の高回転が,コミュニティレベルでの気候変動の主要な結果である可能性があります.
- 気候変動に対する地域社会レベルの対応に関するさらなる研究は,効果的な保全戦略を策定する上で極めて重要です.
関連する概念動画
00:53Migration
Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
01:50Global 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.
01:50Threats 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...
01:57What 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.
02:04Conservation 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...
02:07Conservation 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.