密歇根新闻广播 入侵藻类在密歇根湖肆虐疯长

Michigan has the largest population in the world of starry¹ stonewort, an invasive macroalgae that stifles² native plants and fish.

Starry stonewort loves the clean, clear, and calcium³ carbonate rich waters of Michigan's inland lakes. It grows in dense⁴ mats which can range in thickness from a few inches to a little over six feet.

Scott Brown, the executive director of the Michigan Lake & Stream Association, studies the species and spoke⁵ to Stateside about the problems it creates in lake ecosystems⁶.

The plant looks "quite beautiful in a crude sort of way," Brown said, but it blocks the growth of native aquatic⁷ plants and prevents fish from accessing their spawning⁸ grounds.

To prevent the spread of invasive aquatic plants like starry stonewort, Brown supports the Clean Boats, Clean Waters program, which educates boaters on how to clean and dry their boats between lakes. This prevents fragments of the plant from "hitchhiking" to new lakes, Brown said.

"Even though it's beautiful from a natural history standpoint, it's very disruptive to our inland lakes because its growth is not regulated here, there's nothing to limit its growth," Brown said. "So therefore, it grows in such abundance that it becomes a problem."

1 starry   

adj.星光照耀的, 闪亮的

参考例句：

• He looked at the starry heavens.他瞧着布满星星的天空。
• I like the starry winter sky.我喜欢这满天星斗的冬夜。

2 stifles   

（使）窒息， （使）窒闷( stifle的第三人称单数 )； 镇压，遏制

参考例句：

• This stifles the development of the financial sector. 这就遏制了金融部门的发展。
• The fruits of such a system are a glittering consumer society which stifles creativity and individuality. 这种制度的结果就是一个压制创造性和个性的闪光的消费者社会。

3 calcium   

n.钙(化学符号Ca)

参考例句：

• We need calcium to make bones.我们需要钙来壮骨。
• Calcium is found most abundantly in milk.奶含钙最丰富。

4 dense   

a.密集的，稠密的，浓密的；密度大的

参考例句：

• The general ambushed his troops in the dense woods. 将军把部队埋伏在浓密的树林里。
• The path was completely covered by the dense foliage. 小路被树叶厚厚地盖了一层。

5 spoke   

n.（车轮的）辐条；轮辐；破坏某人的计划；阻挠某人的行动 v.讲，谈（speak的过去式）；说；演说；从某种观点来说

参考例句：

• They sourced the spoke nuts from our company.他们的轮辐螺帽是从我们公司获得的。
• The spokes of a wheel are the bars that connect the outer ring to the centre.辐条是轮子上连接外圈与中心的条棒。

6 ecosystems   

n.生态系统( ecosystem的名词复数 )

参考例句：

• There are highly sensitive and delicately balanced ecosystems in the forest. 森林里有高度敏感、灵敏平衡的各种生态系统。 来自《简明英汉词典》
• Madagascar's ecosystems range from rainforest to semi-desert. 马达加斯加生态系统类型多样，从雨林到半荒漠等不一而足。 来自辞典例句

7 aquatic   

adj.水生的，水栖的

参考例句：

• Aquatic sports include swimming and rowing.水上运动包括游泳和划船。
• We visited an aquatic city in Italy.我们在意大利访问过一个水上城市。

8 spawning   

产卵

参考例句：

• Encounter sites have a small chance of spawning a "Commander" NPC. 遭遇战地区有很小的几率遇到NPC指挥官。
• Instantly revives your Champion at your Spawning Pool, 9 minute cooldown. 立即在出生地复活你的英雄，冷却时间9分钟。