概括
一个极端的热浪导致了移植后的珊瑚死亡. 珊瑚礁恢复专家正在制定新的策略,
科学领域:
- 海洋生物学
- 珊瑚礁的生态
- 气候变化科学
背景情况:
- 珊瑚移植是珊瑚礁恢复的关键方法.
- 最近海上前所未有的热浪导致移植珊瑚的普遍死亡.
- 现有的恢复策略不足以应对极端的热应力.
相关概念视频
01:22Effect of Sea Water on Concrete
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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,...
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01:21Masonry in Cold and Hot Weather Conditions
88
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
Other key practices include keeping masonry units...
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