Yeah, two different species bulls and black tips have attacked four swimmers in little more than six weeks.

是啊，兩種不同種類的公牛和黑尖在六個星期內攻擊了四個游泳者。

The cause is a mystery.

原因是個謎。

The final piece of the puzzle might be found not in the waters of North Carolina, but in the skies above.

最後一塊拼圖可能不是在北卡羅來納州的水裡，而是在上面的天空中找到的。

Just months before the spike, the Tar Heel state was struck by one of the most destructive storms on record.

就在暴漲前的幾個月，塔爾希勒州遭遇了有記錄以來最具破壞性的風暴之一。

Hurricane Florence.

颶風 "佛羅倫薩"。

On September 13th, 2018, 100 mile per hour winds toppled trees and caused widespread power outages.

2018年9月13日，時速100英里的大風吹倒了樹木，造成大面積停電。

Upwards of 30 inches of rain unleashed catastrophic flooding.

高達30多英寸的雨量釋放出災難性的洪水。

So how might this devastating storm connect to the upwelling of shark attacks in 2019?

那麼，這場毀滅性的風暴可能與2019年鯊魚襲擊事件的上揚有什麼聯繫呢？

According to coastal habitat expert Taylor Moretti, it could come down to one of the state's most unique geographical features, 1000 500 square mile network of estuaries that's wedged between the barrier islands and the mainland.

根據沿海棲息地專家泰勒-莫雷蒂的說法，這可能歸結於該州最獨特的地理特徵之一，1000個500平方英里的河口網絡，夾在屏障島嶼和大陸之間。

Here, dozens of freshwater rivers and streams flow into the salty sea.

這裡有幾十條淡水河、溪流流入鹹海。

It's a complex ecosystem full of life, and it's built upon a tiny, unassuming plant.

這是一個充滿生命力的複雜生態系統，它建立在一株不起眼的小植物上。

See grass.

見草。

Sea grass is actually not a grass it all.

海草其實並不是一種草它的全部。

It's a lily that is capable.

這是一朵百合花，是有能力的。

Living in salt environments, it has a root system.

生活在鹽的環境中，它有根系。

It flowers.

它的花。

Seagrass provides vital shelter for all manner of creatures.

海草為各種生物提供了重要的庇護。

This right here is a teeny little blue crab.

這裡是一隻十幾歲的小藍蟹。

Very, very teeny.

非常，非常小的。

The animals that make cigarettes their homes start from small, microscopic creatures like amphipods and that go up to larger creatures like crabs and smaller fish.

把香菸當做自己家的動物，從像兩足動物這樣的小型微觀生物開始，一直到螃蟹和小魚這樣的大型生物。

Thes small marine animals attract larger species like sea turtles and manatees, which in turn draws in sharks.

這些小的海洋動物吸引了更大的物種，如海龜和海牛，這又吸引了鯊魚。

Atlantic sharp nose bowls, black tips and even the occasional large tiger come from the oceans into these estuaries to look for prey.

大西洋尖鼻弓、黑尖，甚至偶爾有大老虎從海洋中來到這些河口尋找獵物。

It's this food chain that provides North Carolina with its rich array of marine life.

正是這個食物鏈為北卡羅來納州提供了豐富的海洋生物。

But during the storm, this chain gets broken.

但在暴風雨中，這條鏈子就斷了。

Intense tropical storms can have an impact on the shark fauna of these estuaries, and it can be long lasting when tropical storms passed through.

強烈的熱帶風暴會對這些河口的鯊魚動物群產生影響，當熱帶風暴經過時，這種影響會持續很久。

They often leave a lot of fresh water in their way.

他們往往會留下很多淡水。

When a storm hits, it dumps freshwater across the region, both along the coast and inland.

當風暴來襲時，它將淡水傾瀉到整個地區，包括沿海和內陸。

The water that originates on land travels to the estuaries via rivers and streams, but along the way, it picks up some unwanted Hitchhikers, sediment and pollution.

發源於陸地上的水通過河流和溪流進入河口，但沿途會帶走一些不需要的希奇物、沉積物和汙染。

The contaminants are a toxic stew that's deadly for seagrass.

這些汙染物是有毒的燉品，對海草來說是致命的。

Studies have shown that flood sediment can bury entire meadows.

研究表明，洪水泥沙可以掩埋整個草地。

Other areas are decimated when suspended debris blocks out crucial sunlight.

其他地區則因懸掛的碎片擋住了重要的陽光而遭到破壞。

It can take up to five years for the plants to grow back.

它可能需要長達五年的時間才能讓植物恢復生長。

And when the sea grass vanishes, so does the sharks.

當海草消失時，鯊魚也會消失。

Pray on.

禱上。

That reverberates up the entire food chain.

這在整個食物鏈中都會產生反響。

The sharks.

鯊魚。

They typically will leave the system.

他們通常會離開系統。

This chain reaction can have dire consequences for beachgoers if the sharks are not in the estuary way.

如果鯊魚不在河口方式，這種連鎖反應會給海灘上的遊客帶來嚴重的後果。

No, they're not on land, so they're out near shore mhm.

不，他們不在陸地上，所以他們在岸邊，嗯。