Autor: Profª Adriane | Publicado: 2012-09-23T07:05:00-03:00

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As Matas de Araucárias são
encontradas na Região Sul do Brasil e nos pontos de relevo mais elevado da
Região Sudeste. Existem pelo menos dezenove espécies desse tipo de vegetação,
das quais treze são endêmicas (existe em um lugar específico). 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Essa
cobertura vegetal se desenvolve em regiões nas quais predomina o clima
subtropical, que apresenta invernos rigorosos e verões quentes, com índices
pluviométricos relativamente elevados e bem distribuídos durante o ano. A
araucária é um vegetal da família das coníferas que pode ser cultivado com fins
ornamentais, em miniaturas.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; O
Pinheiro-do-Paraná ou Araucária (Araucaria angustifolia) era
encontrado com abundância no passado, atualmente no Brasil restaram restritas
áreas preservadas.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; As
árvores que compõem essa particular cobertura vegetal possuem altitudes que
podem variar entre 25 e 50 metros e troncos com 2 metros de espessura. As
sementes dessas árvores, conhecidas como pinhão, podem ser ingeridas, os galhos
envolvem todo o tronco central. Os fatores determinantes para o desenvolvimento
dessa planta é o clima e o relevo, uma vez que ocorre principalmente em áreas
de relevo mais elevado.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Outra
particularidade das araucárias é a restrita ocorrência de flores, provenientes
das baixas temperaturas; além de não desenvolver outros tipos de plantas nas
proximidades dos pinheiros. Diante disso, a composição paisagística dessa
vegetação fica caracterizada principalmente pelo espaçamento entre as árvores,
pois não existem vegetais de pequeno porte que poderiam fazer surgir uma
vegetação densa; essas são compostas por florestas ralas.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Infelizmente,
no Brasil, a proliferação das Araucárias está bastante comprometida e corre
sério risco de entrar em extinção, fato decorrente das atividades produtivas
desenvolvidas há várias décadas na região, especialmente na extração de madeira
e ocupação agropecuária, reduzindo a 3% a forma original.



Por Eduardo de Freitas
http://www.brasilescola.com/brasil/mata-araucarias.htm
Acesso em 19/09/2012 às 14:24&nbsp; 





1-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
Com o auxílio do dicionário, pesquise o
significado de cada uma dessas palavras e depois elabore uma frase com elas:



a)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Endêmicas:



b)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Pluviométricas:



c)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Ornamental:



d)&nbsp;&nbsp;&nbsp;&nbsp; Abundância: