How temperature, precipitation and stand age control the biomass carbon density of global mature forests

AimTo understand: (1) how temperature, precipitation and stand age control the above-ground biomass carbon density (BCDa) of mature forests and its macroecology patterns across latitudes; (2) the age threshold for old-growth forests at a global scale. LocationGlobal forests. MethodsWe compiled a database (897 sites) of mature forests between 80 and 1200 years old. The site data include latitude, longitude, mean annual temperature, mean annual precipitation, forest type, stand age, BCDa, living biomass (above- and below-ground biomass) carbon density and total (living plus dead) biomass carbon density. Based on the site data, we performed regression analyses to show how BCDa changes with climate and forest stand age. ResultsAt a global scale, the highest BCDa of mature forests occurred mainly in the mid-latitude regions where mean annual temperatures were 8-10 degrees C and mean annual precipitation was between 1000 and 2500mm. The average BCDa of forests in the stand age class of 450-500 years was higher than those in the other stand age classes. For forests between 80 and 450 years old, which form the majority of mature forests, carbon accumulation was faster in dead biomass than in living biomass. Main conclusionsThe highest BCDa of mature forests is located in mid-latitude regions with cool temperatures and moderate precipitation. The age threshold for old-growth forests at a global scale should be 450-500 years, which is much older than the previously documented age of 100-200 years. This older age threshold for old-growth forests is probably one of the primary reasons why recent works have concluded that old-growth forests are still carbon sinks.

[1]  Shilong Piao,et al.  Altitudinal changes in carbon storage of temperate forests on Mt Changbai, Northeast China , 2010, Journal of Plant Research.

[2]  Jerry F. Franklin,et al.  Causes and implications of the correlation between forest productivity and tree mortality rates , 2011 .

[3]  Claire Alix,et al.  Changes in forest productivity across Alaska consistent with biome shift. , 2011, Ecology letters.

[4]  Liu Yinghui.  Conceptual Framework of Carbon Sequestration Rate and Potential Increment of Carbon Sink of Regional Terrestrial Ecosystem and Scientific Basis for Quantitative Carbon Authentification , 2011 .

[5]  G. Trewartha.  An introduction to climate. , 1980 .

[6]  W. Köppen,et al.  Grundriss der Klimakunde , 1931 .

[7]  Hu Zhongmin.  Ecosystems carbon storage and carbon sequestration potential of two main tree species for the Grain for Green Project on China′s hilly Loess Plateau , 2011 .

[8]  Yude Pan,et al.  ‘New Estimates of Carbon Storage and Sequestration in China’S Forests: Effects of Age–Class and Method On Inventory-Based Carbon Estimation’ , 2004 .

[9]  Guirui Yu,et al.  Huge Carbon Sequestration Potential in Global Forests , 2012 .

[10]  H. Muller‐Landau,et al.  Temperature explains global variation in biomass among humid old‐growth forests , 2012 .

[11]  O. Phillips,et al.  The global relationship between forest productivity and biomass , 2007 .

[12]  T. Kira,et al.  PRIMARY PRODUCTION AND TURNOVER OF ORGANIC MATTER IN DIFFERENT FOREST ECOSYSTEMS OF THE WESTERN PACIFIC , 1967 .

[13]  David R. Miller.  Forest stand dynamics , 1997 .

[14]  G. Brunialti,et al.  Multi‐taxon and forest structure sampling for identification of indicators and monitoring of old‐growth forest , 2010 .

[15]  F. Wagner,et al.  Good Practice Guidance for Land Use, Land-Use Change and Forestry , 2003 .

[16]  R. J. Pool,et al.  Plant Succession. An Analysis of the Development of Vegetation , 1917 .

[17]  A. Di Fiore,et al.  Increasing biomass in Amazonian forest plots. , 2004, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[18]  J. Banks,et al.  How old are Wet Forest understories , 1996 .

[19]  E. Odum.  The strategy of ecosystem development. , 1969, Science.

[20]  J. L. Parra,et al.  Very high resolution interpolated climate surfaces for global land areas , 2005 .

[21]  B. Law,et al.  Carbon dynamics of Oregon and Northern California forests and potential land-based carbon storage. , 2009, Ecological applications : a publication of the Ecological Society of America.

[22]  A. I. Gitelman,et al.  Variability in net primary production and carbon storage in biomass across Oregon forests—an assessment integrating data from forest inventories, intensive sites, and remote sensing , 2005 .

[23]  D. Lindenmayer,et al.  Estimating carbon carrying capacity in natural forest ecosystems across heterogeneous landscapes: addressing sources of error , 2009 .

[24]  M. Goulden,et al.  Patterns of NPP, GPP, respiration, and NEP during boreal forest succession , 2011 .

[25]  Guirui Yu,et al.  Regional drought-induced reduction in the biomass carbon sink of Canada's boreal forests , 2012, Proceedings of the National Academy of Sciences.

[26]  Piermaria Corona,et al.  VALUTAZIONE DELLE RISORSE FORESTALI A LIVELLO GLOBALE , 2013 .

[27]  Shuguang Liu,et al.  Old-Growth Forests Can Accumulate Carbon in Soils , 2006, Science.

[28]  C. Bigler,et al.  Increased early growth rates decrease longevities of conifers in subalpine forests , 2009 .

[29]  J. A. Molina,et al.  Coastal salt‐marsh zonation in Tyrrhenian central Italy and its relationship with other Mediterranean wetlands , 2010 .

[30]  Markus Reichstein,et al.  CO2 balance of boreal, temperate, and tropical forests derived from a global database , 2007 .

[31]  P. Tickle,et al.  Global ecological zoning for the Global Forest Resources Assessment 2000 - Final report , 2001 .

[32]  Sean C. Thomas,et al.  Increasing carbon storage in intact African tropical forests , 2009, Nature.

[33]  H. Muller‐Landau.  Carbon cycle: Sink in the African jungle , 2009, Nature.

[34]  F. Woodward,et al.  Global climate and the distribution of plant biomes. , 2004, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[35]  R. B. Jackson,et al.  A Large and Persistent Carbon Sink in the World’s Forests , 2011, Science.

[36]  I. Brown,et al.  Uncertainty in the biomass of Amazonian forests: An example from Rondônia, Brazil , 1995 .

[37]  G. Parker,et al.  Evidence for a recent increase in forest growth , 2010, Proceedings of the National Academy of Sciences.

[38]  M. Harmon,et al.  A chronosequence of wood decomposition in the boreal forests of Russia , 2003 .

[39]  W. Keeton,et al.  Structural characteristics and aboveground biomass of old‐growth spruce–fir stands in the eastern Carpathian mountains, Ukraine , 2010 .

[40]  P. Jarvis.  Atmospheric carbon dioxide and forests , 1989 .

[41]  M. Heimann,et al.  Old-Growth Forests , 2009 .

[42]  D. Clark.  Sources or sinks? The responses of tropical forests to current and future climate and atmospheric composition. , 2004, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[43]  Phillips,et al.  Changes in the carbon balance of tropical forests: evidence from long-term plots , 1998, Science.

[44]  T. Spies.  Ecological Concepts and Diversity of Old-Growth Forests , 2004, Journal of Forestry.

[45]  S. Fisher.  Recovery processes in lotic ecosystems: Limits of successional theory , 1990 .

[46]  Andreas Rigling,et al.  Effect of irrigation on needle morphology, shoot and stem growth in a drought-exposed Pinus sylvestris forest. , 2010, Tree physiology.

[47]  Kurt S. Pregitzer,et al.  Carbon cycling and storage in world forests: biome patterns related to forest age , 2004 .

[48]  F. Chapin,et al.  Principles of Terrestrial Ecosystem Ecology , 2002, Springer New York.

[49]  P. Ciais,et al.  Old-growth forests as global carbon sinks , 2008, Nature.

[50]  M. Heimann,et al.  Old-growth forests : function, fate and value , 2009 .

[51]  James C. Stegen,et al.  Variation in above-ground forest biomass across broad climatic gradients , 2011 .

[52]  David B. Lindenmayer,et al.  Re-evaluation of forest biomass carbon stocks and lessons from the world's most carbon-dense forests , 2009, Proceedings of the National Academy of Sciences.

[53]  S. Sohi.  Agriculture, forestry and other land use , 2014 .

[54]  Jerry F. Franklin,et al.  POTENTIAL UPPER BOUNDS OF CARBON STORES IN FORESTS OF THE PACIFIC NORTHWEST , 2002 .

[55]  Pierre Defourny,et al.  The Global land cover for the year 2000 , 2003 .