Blue spruce needle courtesy of Scott Catron, flickr.

What and How Does It Eat?

All plants use an external energy source to make the complex organic molecules that are used for nutrition.  Like many other plants, the blue spruce uses energy from the light of the sun as its external energy source.  This type of autotrophic nutrition is called photosynthesis.  Photosynthesis takes place in the chloroplasts, which are generally located in the leaves of the plant.  Chloroplasts use chlorophyll which is a green pigment that absorbs red and blue light.  During photosynthesis carbon dioxide, water, and sunlight are used to create sugar, water, and oxygen.  The reaction looks like this:

6CO2 + 6H2O + light energy + 6O2 + H2O

The glucose (C6H12O6) is used as a primary energy source and the oxygen is used for respiration in othBlue spruce macro, courtesy of Hooks pix, flickrer organisms, including humans.

Water is taken in through the roots of the tree.  The water is then transported throughout the tree by transport tissues called xylem.  This is done through a process of diffusion.  Because water travels from an area of high water potential to areas of low water potential water is literally pulled up the tree.  After photosynthesis occurs the organic nutrients created are transported by living tissues called phloem.  Osmotic pressure pushes the organic nutrients through the phloem and throughout the tree.  


 Now that you know what the blue spruce eats lets find out what happens when the lights go out. Find out how it reproduces.