The ultimate source of energy (for most ecosystems) is the sun. The ultimate fate of energy in ecosystems is for it to be lost as heat. Energy and nutrients are passed from organism to organism through the food chain as one organism eats another. Decomposers remove the last energy from the remains of organisms.
The Contribution Limit. For 2013 and 2014. the basic limit for regular contributions to a Roth IRA is $5,500 for people under 50 years of age, and $6,500 for those who are 50 or older. (Numbers like this can be found in our Reference Room.) This limit may be reduced for any of the following reasons:
2014 Traditional & Roth IRA contribution limits. Total annual contributions to your Traditional and Roth IRAs combined cannot exceed: 1  $5,500 (under age 50). 2  $6,500 (age 50 or older).014 Traditional & Roth IRA contribution limits. Total annual contributions to your Traditional and Roth IRAs combined cannot exceed: 1  $5,500 (under age 50). 2  $6,500 (age 50 or older).