関連する実験動画
Updated: Jan 23, 2026

08:53
A Robotic Platform to Study the Foreflipper of the California Sea Lion
Published on: January 10, 2017
8.3K
深海生物圏における人新世の遅延:失われゆく最後の楽園か?
Moriaki Yasuhara1,2, Jingwen Zhang3,4,5, Roberto Danovaro6
1School of Energy and Environment and State Key Laboratory of Marine Environmental Health, City University of Hong Kong, Hong Kong SAR, China.
まとめ
かつて手つかずであった深海生態系は、採掘などの人間による影響が増大しています。劣化した陸域や浅海域の環境とは異なり、深海は
科学分野:
- 海洋生物学、生態学、環境科学
背景:
- 深海生態系は、地球上で最小限の影響を受けている最後の環境の1つです。深海生態系への人間活動の影響はエスカレートしており、広範な文脈化が必要です。陸域および浅海システムにおける歴史的な生態学的劣化は、比較の枠組みを提供します。
研究 の 目的:
- 陸域および浅海生態系における歴史的な劣化と比較することにより、深海における人間活動の影響を文脈化すること。深海における著しい人間活動による劣化の開始時期の遅れを強調すること。深海の生態学的完全性に対する将来の脅威を評価すること。
主な方法:
- 異なる生態系における人間活動による生態学的劣化の歴史的レビュー。劣化のタイムラインと規模の比較分析。深海に対する現在および新たな人間活動による圧力の特定。
主要な成果:
- 陸域生態系は数万年にわたる劣化を示し、浅海生態系は数千年かけて劣化しました。深海の著しい劣化は最近のもので、主に産業革命以降であり、深海トロール漁は1950年代に始まりました。深海の生態学的完全性は、著しく劣化した熱帯雨林やサンゴ礁と比較して、依然として高いレベルにあります。
結論:
- 他の生態系と比較して、深海の生物圏における人新世の劣化は歴史的に遅れています。将来の大規模な深海底採掘および海洋二酸化炭素除去(mCDR)は、重大な脅威をもたらします。深海のユニークな生態学的完全性を維持するために、急速な劣化を防ぐために緊急の注意が必要です。
関連する概念動画
Effect of Sea Water on Concrete
994
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
Concrete in areas between tide marks,...
994
Levels of Organization
139.0K
Biological organization is the classification of biological structures, ranging from atoms at the bottom of the hierarchy to the Earth's biosphere. Each level of the hierarchy represents an increase in complexity that builds upon the previous level.
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
Molecules Are Composed of Atoms, and Biomolecules Are Assembled from Molecules:
The most basic levels include atoms, molecules, and biomolecules. Atoms, the smallest unit of ordinary matter, are composed of a nucleus and electrons. Molecules...
139.0K
Keystone Species
24.2K
Measures of species biodiversity, such as richness (i.e., the number of species present) and evenness (i.e., their relative abundance), describe an ecological community’s structure. Many factors affect community structure, including abiotic factors (e.g., sunlight and nutrients), disturbances (e.g., fire or flood), species interactions (e.g., predation or competition), and chance events (e.g., foreign species invasion). Certain species—such as keystone species—also play a...
24.2K
Bonding in Metals
52.1K
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
52.1K
Optimal Foraging
13.7K
How animals obtain and eat their food is called foraging behavior. Foraging can include searching for plants and hunting for prey and depends on the species and environment.
13.7K
Internal Energy
36.6K
The total of all possible kinds of energy present in a substance is called the internal energy (U), sometimes symbolized as E. Suppose a system with initial internal energy, Uinitial, undergoes a change in energy (transfer of work or heat), and the final internal energy of the system is Ufinal. Change in internal energy equals the difference between Ufinal and Uinitial.
36.6K

