WEBVTT 00:00.700 --> 00:06.000 position:10% line:85% size:80% (MUSIC) 00:06.000 --> 00:07.266 position:10% line:85% size:80% JOAN CARTAN-HANSEN,HOST: 00:07.266 --> 00:08.700 position:10% line:85% size:80% FIRE IS A NATURAL AND 00:08.700 --> 00:11.500 position:10% line:85% size:80% NECESSARY PART OF AN ECOSYSTEM. 00:11.500 --> 00:13.066 position:10% line:85% size:80% FORESTS CAN BECOME OVERGROWN AND 00:13.066 --> 00:14.166 position:10% line:85% size:80% THE FOREST FLOOR CAN BE 00:14.166 --> 00:15.867 position:10% line:85% size:80% OVERWHELMED WITH DEBRIS. 00:15.867 --> 00:17.800 position:10% line:85% size:80% FIRE REMOVES THE UNDERBRUSH. 00:17.800 --> 00:19.233 position:10% line:85% size:80% THE ASH PROVIDES NUTRIENTS FOR 00:19.233 --> 00:20.433 position:10% line:85% size:80% THE SOIL. 00:20.433 --> 00:21.967 position:10% line:85% size:80% AND THE CLEARED GROUND ALLOWS 00:21.967 --> 00:23.800 position:10% line:85% size:80% SPACE FOR NEW PLANTS TO GROW. 00:23.800 --> 00:25.333 position:10% line:85% size:80% THE BARK OF DOUGLAS FIR AND 00:25.333 --> 00:26.900 position:10% line:85% size:80% PONDEROSA PINES ARE BOTH FIRE 00:26.900 --> 00:28.600 position:10% line:85% size:80% RESISTANT. 00:28.600 --> 00:30.066 position:10% line:85% size:80% FOREST FIRES HELP THESE TREES 00:30.066 --> 00:31.700 position:10% line:85% size:80% BECAUSE FIRE CLEARS AWAY OTHER 00:31.700 --> 00:34.000 position:10% line:85% size:80% TREES THAT COMPETE FOR SPACE AND 00:34.000 --> 00:35.100 position:10% line:85% size:80% FOOD. 00:35.100 --> 00:36.533 position:10% line:85% size:80% SOME SPECIES OF TREES ARE 00:36.533 --> 00:38.333 position:10% line:85% size:80% ACTUALLY FIRE DEPENDENT, NEEDING 00:38.333 --> 00:40.266 position:10% line:85% size:80% FIRE EVERY THREE TO 25 YEARS TO 00:40.266 --> 00:42.066 position:10% line:85% size:80% CONTINUE GROWING. 00:42.066 --> 00:43.700 position:10% line:85% size:80% FOR EXAMPLE, THE CONES OF LODGE 00:43.700 --> 00:45.967 position:10% line:85% size:80% POLE PINES ONLY OPEN TO RELEASE 00:45.967 --> 00:47.734 position:10% line:85% size:80% THEIR SEEDS WHEN THE CONES ARE 00:47.734 --> 00:49.967 position:10% line:85% size:80% EXPOSED TO FIRE. 00:49.967 --> 00:51.266 position:10% line:85% size:80% SO, FIRE CAN BE AN IMPORTANT 00:51.266 --> 00:53.166 position:10% line:85% size:80% PART OF NATURE'S PLAN. 00:53.166 --> 00:54.367 position:10% line:85% size:80% FOR MORE INFORMATION ABOUT 00:54.367 --> 00:55.967 position:10% line:85% size:80% WILDFIRES AND OTHER SCIENTIFIC 00:55.967 --> 00:57.367 position:10% line:85% size:80% TOPICS FOR KIDS, CHECK OUT THE 00:57.367 --> 00:58.867 position:10% line:85% size:80% SCIENCE TREK WEBSITE. 00:58.867 --> 00:59.967 position:10% line:85% size:80% YOU'LL FIND IT AT 00:59.967 --> 01:02.333 position:10% line:85% size:80% IDAHOPTV.ORG/SCIENCE TREK 01:02.333 --> 01:04.800 position:10% line:85% size:80% (MUSIC)