Root biomass allocation in southern temperate forests
作者： Tomás A Easdale , Sarah J Richardson , Michael Marden , Jacqueline R England , Jorge Gayoso-Aguilar
DOI: 10.1016/J.FORECO.2019.117542
关键词:
摘要: Abstract Accurate quantification of total forest biomass requires sound estimates root biomass. Because roots are challenging to measure in situ, data sparse, and this has limited our understanding allocation across a range types. Increased sampling the oceanic cool temperate forests southern hemisphere means we now able better understand biome. Here compile systematically review root:shoot ratios for these examine taxonomic, regional, environmental determinants variability roots. Specifically, assess whether access resources resulting from low temperatures or rainfall:temperature increases allocation. A literature database search identified 441 records 25 studies 32 locations around South Pacific. Records were weighted by excavated area as effort. Root:shoot eucalypts southeast Australia (0.277) beech America (0.275) 6–7% above global mean 0.26, while (0.233) other dicots (0.234) New Zealand consistent with values reported (mostly northern hemisphere) broadleaved forests. Low (of trees ≥5 cm stem diameter) relative noted American gymnosperms (0.219), seemingly driven Cupressaceae, tree ferns (0.194). Size effects taxon dependent, marked decline increasing size modest combinations taxa region. clear signal declining was detected, but no major temperature within data. Our findings support current approaches carbon estimation leave room refinement, specific recommendations given context.
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