大型マクロポッドの温度調節戦略は高温で異なります.
Loic Q Juillard1, Lisa M Ashby1, Taylor J McEvoy1
1Centre for Compassionate Conservation, TD School, University of Technology Sydney, Ultimo 2007 NSW, Australia.
Journal of thermal biology
|August 23, 2025
まとめ
温度が上昇するにつれて カンガルーは影と水を求めます 東部灰色のカンガルーは ダムを好み 赤色のカンガルーは 影を好み 野生生物の生存に必要な 景観の特徴を強調しています
科学分野:
- エコロジー
- 気候変動の生物学
- 野生生物保護
背景:
- 半乾燥地帯は 気候変動による気温上昇に直面しています
- 水や木の影のような風景の特徴は 野生生物の熱ストレス軽減に不可欠です
- 人為的な活動により オーストラリアの乾燥地帯では 樹冠が失われ,水資源が変化しました
研究 の 目的:
- 温度に応じて水源や木の影を利用する東部の灰色のカンガルー (Macropus giganteus) と赤色のカンガルー (Osphranter rufus) を調査する.
- カンガルーの暑さによる 景観の変化 (水路の堤防,土の貯水池) を理解する.
主な方法:
- カンガルーの活動と環境状態を監視するために 熱ドローン,カメラトラップ,温度センサーを使用しました
- カンガルーの太陽,影,水資源の利用と環境温度の相関性を調べました.
- カンガルーが好む水源を比較した.
主要な成果:
- カンガルーは,気温が上昇するにつれて日当たりの多い地域を避けました.東部のグレーカンガルーは28°C以上で,赤いカンガルーは17°C以上で時間の50%を過ごしました.
- カンガルーの影の使用は温度と正の相関関係があり,赤いカンガルーはより強い影選択を示しています.
- 東部グレーカンガルーは28°C以上で水位活動が大幅に増加し,土のタンクよりも堤防の水路を好む.赤いカンガルーは非常に高い温度 (>36°C) で堤防を好むことが弱かった.
結論:
- 温暖化中の半乾燥環境での野生生物の存続は,水と影のような重要な景観の特徴の利用と維持にますます依存しています.
- 保護戦略では,気候変動下で大きなマクロポッド集団を支えるために,水と十分な樹冠の提供を考慮する必要があります.
- 東部グレーと赤のカンガルーの資源の使用の差は,種特有の生息地管理の必要性を示唆しています.
関連する概念動画
Thermoregulation
1.3K
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
1.3K
Body Temperature
2.5K
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
2.5K
Mechanism of heat transfer
1.4K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
1.4K
Diversity of Archaea IV
102
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
102
Requirements for Human Life
10.4K
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
10.4K
Responses to Heat and Cold Stress
13.8K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.8K


