Carbon is released to the atmosphere by

Carbon is released to the atmosphere from what are called "carbon sources" and stored in plants, animals, rocks, and water in what are called "carbon sinks."

Cladistics-This way(method) groups all the descendants from a common radiation into a clade as a related group and no others.Phylogeny- is a way of tracking evolutionary relationships based on shared characters between different species

Explanation:

Cladistics is concerned with entire branchings. This way(method) groups all the descendants from a common radiation into a clade as a related group and no others. The clades are monophyletic.

Cladistics is a narrower definition of an older, less precise concept now days.

Phylogeny is a way of tracking evolutionary relationships based on shared characters between different species.. This method allows convergent characters to be grouped despite their having followed a separate evolutionary path.  

Cladistics is a way (method) of grouping the related branches based on sharing derived characters within the group. However, these characters are not found in any  other species except by convergence.