气候变化领域集成服务门户(CCPortal): Root biomass allocation in southern temperate forests

CCPortal

DOI	10.1016/j.foreco.2019.117542
	Root biomass allocation in southern temperate forests
	Easdale T.A.; Richardson S.J.; Marden M.; England J.R.; Gayoso-Aguilar J.; Guerra-Cárcamo J.E.; McCarthy J.K.; Paul K.I.; Schwendenmann L.; Brandon A.M.
发表日期	2019
ISSN	0378-1127
卷号	453
英文摘要	Accurate quantification of total forest biomass requires sound estimates of root biomass. Because roots are challenging to measure in situ, data are sparse, and this has limited our understanding of root allocation across a range of forest types. Increased sampling in the oceanic and cool temperate forests of the southern hemisphere means we are now able to better understand biomass allocation in this biome. Here we compile and systematically review root:shoot ratios for these forests and examine the taxonomic, regional, and environmental determinants of variability in biomass allocation to roots. Specifically, we assess whether limited access to resources resulting from low temperatures or low rainfall:temperature ratios increases root allocation. A literature and database search identified 441 root:shoot records from 25 studies and 32 locations around the South Pacific. Records were weighted by excavated area as a measure of sampling effort. Root:shoot ratios for eucalypts in southeast Australia (0.277) and southern beech in South America (0.275) were 6–7% above the global mean of 0.26, while southern beech (0.233) and other dicots (0.234) in New Zealand were consistent with values reported for temperate (mostly northern hemisphere) broadleaved forests. Low root:shoot ratios (of trees ≥5 cm stem diameter) relative to the global mean were noted for South American gymnosperms (0.219), seemingly driven by low values in the Cupressaceae, and New Zealand tree ferns (0.194). Size effects were taxon dependent, with a marked decline in root:shoot ratios with increasing stem size for the southern beech in South America and modest effects for other combinations of taxa and region. A clear signal of increasing root allocation with declining rainfall:temperature ratios was detected, but no major effects of temperature were noted within the range of the data. Our findings support current approaches to biomass and carbon estimation but leave room for refinement, with specific recommendations given for the New Zealand context. © 2019
英文关键词	Below-ground biomass; Eucalyptus; Nothofagaceae; Root:shoot ratio; Tree fern; Tree size
语种	英语
scopus关键词	Biomass; Rain; Search engines; Temperature; Eucalyptus; Ground biomass; Nothofagaceae; Root: shoot ratios; Tree fern; Tree size; Forestry; belowground biomass; biomass allocation; low temperature; root; root-shoot ratio; Southern Hemisphere; temperate forest; Biomass; Distribution; Eucalyptus; Forestry; Forests; Rain; Ratios; Temperature; Australia; New Zealand; Pacific Ocean; Pacific Ocean (South); South America; Cupressaceae; Dicotyledoneae; Eucalyptus; Fagus; Filicophyta; Gymnospermae; Nothofagaceae
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155727
作者单位	Manaaki Whenua – Landcare Research, PO Box 69040, Lincoln, 7640, New Zealand; Manaaki Whenua – Landcare Research, Private Bag 11052, Manawatu Mail Centre, Palmerston North, 4442, New Zealand; CSIRO Land and Water, Private Bag 10, Clayton South, VIC 3169, Australia; Universidad Austral de Chile, Facultad de Cs, Forestales y Recursos Naturales, Valdivia, Chile; CSIRO Land and Water, GPO Box 1700ACT 2601, Australia; School of Environment, The University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand; Ministry for the Environment, 23 Kate Sheppard Place, Wellington, 11040, New Zealand
推荐引用方式 GB/T 7714	Easdale T.A.,Richardson S.J.,Marden M.,et al. Root biomass allocation in southern temperate forests[J],2019,453.
APA	Easdale T.A..,Richardson S.J..,Marden M..,England J.R..,Gayoso-Aguilar J..,...&Brandon A.M..(2019).Root biomass allocation in southern temperate forests.Forest Ecology and Management,453.
MLA	Easdale T.A.,et al."Root biomass allocation in southern temperate forests".Forest Ecology and Management 453(2019).