Rate of tree carbon accumulation increases continuously with tree size

A global analysis of 403 tropical and temperate tree species, showing that for most species mass growth rate increases continuously with tree size. Thus, large, old trees do not act simply as senescent carbon reservoirs but actively fix large amounts of carbon. At the extreme the annual fixing of carbon by a single large tree can equal the entire carbon content of a smaller tree.

Stephenson, N.L. et al.

Long-Term Effects of Wild fire on Ecosystem Properties Across an Island Area Gradient

Boreal forest soils play an important role in the global carbon cycle by functioning as a large terrestrial carbon sink or source, and the alteration of fire regime through global change phenomena may influence this role. In this study a system of forested lake islands in the boreal zone of Sweden for which fire frequency increases with increasing island size was investigated for evidence of environmental factors being influenced by fire frequency.

Wardle, D.A.; Hörnberg, G.; Zackrisson, O.; Kalela-Brundin, M.; Coomes, D.A.

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