Gabriela Salgado 6th perdidon Redwood tree


Published on

Published in: Education, Technology
  • Be the first to comment

  • Be the first to like this

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide

Gabriela Salgado 6th perdidon Redwood tree

  1. 1. Redwood Tree Gabriela Salgado Mr.Buchmann Biology 6th
  2. 2. Statistics <ul><li>Scientific name: Sequoia Sempervirens </li></ul><ul><li>Size:15 feet across 305 feet in height may weigh upwards of 500 tons </li></ul><ul><li>Color: soft red </li></ul><ul><li>Tallest living trees on earth </li></ul><ul><li>Can live 2000 years. </li></ul>
  3. 3. Habitat Range <ul><li>    The coast redwoods are native to North America. </li></ul><ul><li>The species naturally grow in only one place in the world: a strip along the Pacific Coast of North America </li></ul><ul><li>This strip begins in southwestern Oregon and extends down the coast, just south of Monterey in northwestern California. </li></ul><ul><li>Other redwood species, were once much more widespread than they are today. Paleobotanists have exposed fossil redwoods from around the western United States and Canada, Northern Mexico, and along the coasts of Europe and Asia </li></ul>
  4. 4. Specific Habitat <ul><li>Infrequent frost moderate summer temperatures. </li></ul><ul><li>Combination of high levels of precipitation in winter combined with fog in the summer. </li></ul><ul><li>The redwood likes the mild, moist climate of coastal northwest California. </li></ul><ul><li>The trees enjoy lots of water from the rain and fog which is prevalent in the area. </li></ul><ul><li>Redwoods need fire to survive. The bark of the coast redwood contains tannins, chemicals which resist burning. </li></ul><ul><li>Holleran, Patrick. &quot;Redwood National Park.&quot; Park Vision . 2011. Web. 28 Apr. 2011. <>. </li></ul>
  5. 5. Reproduction <ul><li>Redwoods are monoecious, meaning both male (pollen-producing) and female (seed-bearing) cones are born on the same tree but on different branches. </li></ul><ul><li>The pollen is shed in winter or in spring, fertilized ovulate cones ripen in early fall to shed their seeds in late fall and early winter. </li></ul><ul><li>Cones are only produced after they reach the canopy and can use direct sunlight for energy. Each cone holds between 14 and 24 seeds. Redwoods start to bear their seeds when they are about five to fifteen years old. </li></ul><ul><li>The cones dry under conditions of low humidity and release their seeds. Rains normally speed up seed dispersal. </li></ul><ul><li>However, less than 5% of these seeds germinate, and only a few of these end up growing into seedlings. </li></ul><ul><li>Growth of young redwoods is best in full sunlight, but the trees are able to grow in dense shade as well. Photosynthesis rates are surprisingly high in redwoods, even at low light intensities. </li></ul>
  6. 6. Reproduction <ul><li> </li></ul>
  7. 7. Population Size&Conservation Status <ul><li>2,500 square miles of redwood </li></ul><ul><li>Much of the land is unprotected. Three timber companies own more than a third of the forest </li></ul><ul><li>The state of California and the federal government own 21 percent, and smallholders own the rest. </li></ul><ul><li>In addition to logging, redwoods face the threats of urban development, population growth, and climate change. </li></ul>
  8. 8. Human Interaction <ul><li>Sadly, the greatest threat to the coast redwood trees is humans. In the past, logging has been very destructive to the redwood forest. In fact, more than 95% of the original coastal redwood forests have been cut down </li></ul><ul><li>In 1900, the first activist organization, Sempervirens Club was established </li></ul><ul><li>The first redwood park, now known as the Big Basin Redwoods State Park, was set aside. </li></ul><ul><li>In 1907, Muir Woods National Monument was preserved. Save the Redwoods League was established. </li></ul><ul><li>More lately, urban development is threatening the coastal redwoods, mainly in places close to growing population centers </li></ul>
  9. 9. Human Interaction
  10. 10. Works cited <ul><li>King, Zelda. &quot;Forest Habitats.&quot; PowerKids Life Science, Rosen Publishing Group, Inc., 2011. 28 Apr. 2011 < >. </li></ul><ul><li>Holleran, Patrick. &quot;Redwood National Park.&quot; Park Vision . 2011. Web. 28 Apr. 2011. <>. </li></ul><ul><li>  Hill, Alison. &quot;Redwood Ecology.&quot; . 1996. Web. 28 Apr. 2011. <>. </li></ul><ul><li>Hemmerich, Natalie. &quot;Reproduction of Coast Redwood.&quot; BioWeb Home . 15 Apr. 2009. Web. 06 May 2011. htm </li></ul><ul><li>Wildlife Conservation Society. &quot;The Tallest Trees – Wildlife Conservation Society - Wildlife Conservation Society.&quot; - Wildlife Conservation Society . 2011. Web. 06 May 2011. <>. </li></ul><ul><li> </li></ul>