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(单词翻译:双击或拖选)
Crop rotation1 is a recognized way to keep soil and food eco-system healthy. Now scientists are saying that rotation could be a useful tool in the sea. Researchers tracked the shallow water near shore species used for food-sea cucumbers. They'are easy to harvest and are fairly valuable. But the same attributes mean they are easy to overharvest. The parctice has put some sea cucumber species at high risk of extinction2, even in a relatively3 well-managed area, the Great Barrier marine4 part in Australia. In 2004, authorities split the Great Barrier Reef into 154 zones where each zone was fished only once every 3 years. Fishers rotate through the region. In computer models, the researchers ran through dozens of simulations of each zone both before and after the division took place. The trials revealed that even with an identical and low capture allowance in all cases, the sea cucumbers would recover more foily under rotation strategy than by harvesting simultaneously5 throughout the region. In fact in trails that included rotations6, the yield actually increased. The research is in the proceding of the national academic Of Sciences. The scientists say their results suggest that such rotation might be beneficial in these kinds of shallow marion regions around the world, particularly for species that are in high demand. Because you should not eat your seed corn or your seed sea cucumbers.
1 rotation | |
n.旋转;循环,轮流 | |
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2 extinction | |
n.熄灭,消亡,消灭,灭绝,绝种 | |
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3 relatively | |
adv.比较...地,相对地 | |
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4 marine | |
adj.海的;海生的;航海的;海事的;n.水兵 | |
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5 simultaneously | |
adv.同时发生地,同时进行地 | |
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6 rotations | |
旋转( rotation的名词复数 ); 转动; 轮流; 轮换 | |
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