警方称，那是一场无法控制的草原火灾。
实验表明，如果美洲稀树大草原没有发生火灾，物种组成将发生显著变化。
Experiments suggest that if fire did not occur in savannas in the Americas, species composition would change significantly.
在北卡罗莱纳州的松树稀树草原上，对火灾增长的抑制使得其他植物生长过快，在它们的自然环境中胜于捕蝇草。
In the pine savannah of North Carolina, the increasing suppression of fires is allowing other plants to grow too quickly and out compete the flytraps in their native environment.
火灾是维持稀树草原的一个重要因素，在大多数地区都是如此，（人们）对此通常很少有疑问。
There is generally little doubt that fire is a significant factor in maintaining savanna, certainly in most regions.
如果这样会阻止树木的重新生长，这块地区会退化成草原——这样火灾的风险更大，Goldammer说。
That could prevent the forests from growing back and the area will turn to grassland — and so be even more vulnerable to wildfires, says Goldammer.
大片的森林和草原都处于干旱状态给自然火灾带来了大量的燃料，相对较高的阵风天气和低湿度则给火灾快速蔓延提供了绝好机会。
Relatively high winds and low humidity levels have also contributed to the rapid spread and expansion of fires.
这里大草原的树木稀少因为季节性洪水和干旱，沉重的放牧还有火灾。
Trees are sparse on grasslands due to seasonal floods and droughts heavy grazing and fires.
这里大草原的树木稀少因为季节性洪水和干旱，沉重的放牧还有火灾。
Trees are sparse on grasslands due to seasonal floods and droughts heavy grazing and fires.
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