[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:03.41,0:00:05.01,Default,,0000,0000,0000,,A pedra angular original
Dialogue: 0,0:00:05.01,0:00:08.46,Default,,0000,0000,0000,,refere-se a uma laje em forma de cunha\Nno topo de um arco de pedra.
Dialogue: 0,0:00:08.46,0:00:12.03,Default,,0000,0000,0000,,Se retirar a pedra angular,\Ncorre o risco de tudo cair.
Dialogue: 0,0:00:12.03,0:00:17.08,Default,,0000,0000,0000,,Alguns ecossistemas funcionam assim,\Ndependendo de uma espécie-chave.
Dialogue: 0,0:00:17.08,0:00:18.91,Default,,0000,0000,0000,,Em biologia, as espécies-chave
Dialogue: 0,0:00:18.91,0:00:22.13,Default,,0000,0000,0000,,têm um impacto\Ndesproporcionalmente grande no seu habitat
Dialogue: 0,0:00:22.13,0:00:23.70,Default,,0000,0000,0000,,tendo em conta a dimensão ou número.
Dialogue: 0,0:00:23.70,0:00:26.84,Default,,0000,0000,0000,,As suas atividades diárias afetam\Ntodos os tipos de outras espécies
Dialogue: 0,0:00:26.84,0:00:28.43,Default,,0000,0000,0000,,direta ou indiretamente.
Dialogue: 0,0:00:28.43,0:00:32.16,Default,,0000,0000,0000,,Uma alteração no seu número\Npode causar uma cascata trófica
Dialogue: 0,0:00:32.16,0:00:34.41,Default,,0000,0000,0000,,em que os efeitos\Nse propagam pelo ecossistema
Dialogue: 0,0:00:34.41,0:00:35.79,Default,,0000,0000,0000,,de forma surpreendente.
Dialogue: 0,0:00:35.79,0:00:38.65,Default,,0000,0000,0000,,Veja os lobos-cinzentos\Ndo Parque de Yellowstone, no Wyoming.
Dialogue: 0,0:00:38.65,0:00:41.60,Default,,0000,0000,0000,,O seu número caiu para zero\Nno início da década de 1930
Dialogue: 0,0:00:41.60,0:00:42.86,Default,,0000,0000,0000,,sobretudo devido à caça.
Dialogue: 0,0:00:42.86,0:00:46.58,Default,,0000,0000,0000,,Mas em 1995, os lobos\Nforam reintroduzidos no parque
Dialogue: 0,0:00:46.58,0:00:49.14,Default,,0000,0000,0000,,e o seu impacto\Ntem sido monitorizado desde então.
Dialogue: 0,0:00:49.14,0:00:52.14,Default,,0000,0000,0000,,Afinal, o impacto é muito importante.
Dialogue: 0,0:00:52.14,0:00:54.51,Default,,0000,0000,0000,,A ausência e a reintrodução dos lobos
Dialogue: 0,0:00:54.51,0:00:57.80,Default,,0000,0000,0000,,alteraram Yellowstone\Nde forma significativa e surpreendente
Dialogue: 0,0:00:58.13,0:01:00.16,Default,,0000,0000,0000,,até a forma como os rios correm.
Dialogue: 0,0:01:00.16,0:01:03.31,Default,,0000,0000,0000,,Por um lado, os lobos alimentam-se\Ndos alces, e os alces sabem-no.
Dialogue: 0,0:01:03.31,0:01:06.22,Default,,0000,0000,0000,,Assim, o seu comportamento muda\Nquando os lobos estão na zona.
Dialogue: 0,0:01:06.22,0:01:09.88,Default,,0000,0000,0000,,Os alces são nómadas, mantendo-se\Nem movimento enquanto comem plantas.
Dialogue: 0,0:01:09.88,0:01:13.82,Default,,0000,0000,0000,,Mas sem lobos por perto, os alces\Ntornaram-se muito menos cautelosos,
Dialogue: 0,0:01:13.82,0:01:16.86,Default,,0000,0000,0000,,preferindo instalar-se e comer muito\Nnum só lugar de cada vez.
Dialogue: 0,0:01:16.86,0:01:19.27,Default,,0000,0000,0000,,Os alces até comeram até à margem do rio
Dialogue: 0,0:01:19.27,0:01:22.28,Default,,0000,0000,0000,,onde não se atreveriam a ficar\Nse houvesse lobos por perto.
Dialogue: 0,0:01:22.28,0:01:25.29,Default,,0000,0000,0000,,Em vez de comerem um pouco\Nde muitas plantas diferentes
Dialogue: 0,0:01:25.29,0:01:29.08,Default,,0000,0000,0000,,comeram tanto de cada vez\Nque os álamos e os choupos diminuíram
Dialogue: 0,0:01:29.08,0:01:30.74,Default,,0000,0000,0000,,assim como os salgueiros ribeirinhos
Dialogue: 0,0:01:30.83,0:01:32.84,Default,,0000,0000,0000,,de que os os castores\Ne algumas aves canoras dependem.
Dialogue: 0,0:01:32.84,0:01:34.99,Default,,0000,0000,0000,,
Dialogue: 0,0:01:34.99,0:01:37.31,Default,,0000,0000,0000,,
Dialogue: 0,0:01:37.31,0:01:40.30,Default,,0000,0000,0000,,
Dialogue: 0,0:01:40.30,0:01:43.84,Default,,0000,0000,0000,,
Dialogue: 0,0:01:43.84,0:01:47.14,Default,,0000,0000,0000,,
Dialogue: 0,0:01:47.14,0:01:48.85,Default,,0000,0000,0000,,
Dialogue: 0,0:01:48.85,0:01:51.50,Default,,0000,0000,0000,,
Dialogue: 0,0:01:51.50,0:01:53.49,Default,,0000,0000,0000,,
Dialogue: 0,0:01:53.49,0:01:56.93,Default,,0000,0000,0000,,
Dialogue: 0,0:01:56.93,0:01:58.42,Default,,0000,0000,0000,,
Dialogue: 0,0:01:58.42,0:02:01.20,Default,,0000,0000,0000,,
Dialogue: 0,0:02:01.20,0:02:04.67,Default,,0000,0000,0000,,
Dialogue: 0,0:02:04.67,0:02:07.06,Default,,0000,0000,0000,,
Dialogue: 0,0:02:07.06,0:02:08.80,Default,,0000,0000,0000,,
Dialogue: 0,0:02:08.80,0:02:10.46,Default,,0000,0000,0000,,
Dialogue: 0,0:02:10.46,0:02:14.29,Default,,0000,0000,0000,,
Dialogue: 0,0:02:14.29,0:02:16.33,Default,,0000,0000,0000,,
Dialogue: 0,0:02:16.33,0:02:19.49,Default,,0000,0000,0000,,
Dialogue: 0,0:02:19.49,0:02:22.82,Default,,0000,0000,0000,,
Dialogue: 0,0:02:22.82,0:02:25.61,Default,,0000,0000,0000,,
Dialogue: 0,0:02:25.61,0:02:28.88,Default,,0000,0000,0000,,
Dialogue: 0,0:02:28.88,0:02:32.29,Default,,0000,0000,0000,,
Dialogue: 0,0:02:32.29,0:02:35.14,Default,,0000,0000,0000,,
Dialogue: 0,0:02:35.14,0:02:39.23,Default,,0000,0000,0000,,
Dialogue: 0,0:02:39.23,0:02:41.87,Default,,0000,0000,0000,,
Dialogue: 0,0:02:41.87,0:02:43.71,Default,,0000,0000,0000,,
Dialogue: 0,0:02:43.71,0:02:46.52,Default,,0000,0000,0000,,
Dialogue: 0,0:02:46.52,0:02:49.02,Default,,0000,0000,0000,,
Dialogue: 0,0:02:49.02,0:02:53.08,Default,,0000,0000,0000,,
Dialogue: 0,0:02:53.08,0:02:56.66,Default,,0000,0000,0000,,
Dialogue: 0,0:02:56.66,0:02:59.40,Default,,0000,0000,0000,,
Dialogue: 0,0:02:59.40,0:03:03.00,Default,,0000,0000,0000,,
Dialogue: 0,0:03:03.00,0:03:07.12,Default,,0000,0000,0000,,
Dialogue: 0,0:03:07.12,0:03:09.48,Default,,0000,0000,0000,,
Dialogue: 0,0:03:09.48,0:03:14.53,Default,,0000,0000,0000,,
Dialogue: 0,0:03:14.53,0:03:18.10,Default,,0000,0000,0000,,
Dialogue: 0,0:03:18.10,0:03:21.15,Default,,0000,0000,0000,,
Dialogue: 0,0:03:21.15,0:03:25.09,Default,,0000,0000,0000,,
Dialogue: 0,0:03:25.09,0:03:29.70,Default,,0000,0000,0000,,
Dialogue: 0,0:03:29.70,0:03:32.17,Default,,0000,0000,0000,,
Dialogue: 0,0:03:32.17,0:03:36.46,Default,,0000,0000,0000,,
Dialogue: 0,0:03:36.46,0:03:38.88,Default,,0000,0000,0000,,
Dialogue: 0,0:03:38.88,0:03:41.72,Default,,0000,0000,0000,,
Dialogue: 0,0:03:41.72,0:03:44.02,Default,,0000,0000,0000,,
Dialogue: 0,0:03:44.02,0:03:46.85,Default,,0000,0000,0000,,
Dialogue: 0,0:03:46.85,0:03:50.37,Default,,0000,0000,0000,,
Dialogue: 0,0:03:50.37,0:03:53.100,Default,,0000,0000,0000,,
Dialogue: 0,0:03:53.100,0:03:56.52,Default,,0000,0000,0000,,
Dialogue: 0,0:03:56.52,0:03:57.98,Default,,0000,0000,0000,,
Dialogue: 0,0:03:57.98,0:04:01.01,Default,,0000,0000,0000,,
Dialogue: 0,0:04:01.01,0:04:02.15,Default,,0000,0000,0000,,
Dialogue: 0,0:04:02.15,0:04:05.53,Default,,0000,0000,0000,,
Dialogue: 0,0:04:05.53,0:04:08.71,Default,,0000,0000,0000,,
Dialogue: 0,0:04:08.71,0:04:10.80,Default,,0000,0000,0000,,
Dialogue: 0,0:04:10.80,0:04:14.42,Default,,0000,0000,0000,,
Dialogue: 0,0:04:14.42,0:04:17.49,Default,,0000,0000,0000,,
Dialogue: 0,0:04:17.49,0:04:21.57,Default,,0000,0000,0000,,
Dialogue: 0,0:04:21.57,0:04:25.03,Default,,0000,0000,0000,,
Dialogue: 0,0:04:25.03,0:04:28.26,Default,,0000,0000,0000,,
Dialogue: 0,0:04:28.26,0:04:31.55,Default,,0000,0000,0000,,
Dialogue: 0,0:04:31.55,0:04:35.31,Default,,0000,0000,0000,,
Dialogue: 0,0:04:35.31,0:04:39.34,Default,,0000,0000,0000,,
Dialogue: 0,0:04:39.34,0:04:41.53,Default,,0000,0000,0000,,
Dialogue: 0,0:04:41.53,0:04:43.55,Default,,0000,0000,0000,,
Dialogue: 0,0:04:43.55,0:04:45.69,Default,,0000,0000,0000,,
Dialogue: 0,0:04:45.69,0:04:47.79,Default,,0000,0000,0000,,
Dialogue: 0,0:04:47.79,0:04:50.25,Default,,0000,0000,0000,,
Dialogue: 0,0:04:50.25,0:04:53.81,Default,,0000,0000,0000,,
Dialogue: 0,0:04:53.81,0:04:56.01,Default,,0000,0000,0000,,
Dialogue: 0,0:04:56.01,0:04:57.79,Default,,0000,0000,0000,,
Dialogue: 0,0:04:57.79,0:04:59.66,Default,,0000,0000,0000,,
Dialogue: 0,0:04:59.66,0:05:02.22,Default,,0000,0000,0000,,
Dialogue: 0,0:05:02.22,0:05:04.35,Default,,0000,0000,0000,,
Dialogue: 0,0:05:04.35,0:05:07.05,Default,,0000,0000,0000,,