DOI: 10.1016/j.foreco.2016.04.012
Scopus记录号: 2-s2.0-84964621651
论文题名: Pattern of carbon and nutrient cycling in a small Eucalyptus forest catchment, NSW
作者: Turner J. ; Lambert M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 372 起始页码: 258
结束页码: 268
语种: 英语
英文关键词: Nutrient content
; Nutrient cycling
Scopus关键词: Calcium
; Catchments
; Forestry
; Land use
; Nutrients
; Runoff
; Soils
; Statistical methods
; Biogeochemical cycling
; Biomass equations
; Eucalyptus forests
; Growth increments
; Long-term transfer
; Nutrient contents
; Nutrient cycling
; Weighted averages
; Vegetation
; biogeochemistry
; calcium
; carbon cycle
; evergreen forest
; forested catchment
; magnesium
; nutrient cycling
; phosphorus
; soil nutrient
; soil-vegetation interaction
; woodland
; Australia
; New South Wales
; Eucalyptus
英文摘要: The distribution and cycling of carbon and nutrients of a small, calibrated research catchment vegetated with regrowth eucalypt forest was studied over a 30 year period. The vegetation is mixed species, dry Eucalyptus woodland with an average age of 64 years at the commencement. Study plots were established within land unit strata and used to estimate mean weighted averages for the catchment. Biomass equations for each aboveground component of each species were developed and each component was analyzed for N, P, K, Ca and Mg. In 1977 the mean weighted average carbon content of the catchment was 113.2 Mg C ha-1 of which 43.3% was in the vegetation and litter and in 2011 it was 149.6 Mg C ha-1 with 55.1% in the vegetation and litter, an accretion rate of 1.1 Mg C ha-1 yr-1. The nitrogen quantity was 3900 kg ha-1 of which 4.7% was in the vegetation increasing to 4188 kg N ha-1 in 2011 with 6.7% in vegetation, an apparent increase of 8.5 kg N ha-1 yr-1. The initial phosphorus quantity, using soil available P, was 25.6 kg P ha-1, with 45.8% in vegetation and in 2011 this changed to 33.0 kg P ha-1 of which 57.1% in litter and vegetation. When soil total P was estimated there was 1486 kg P ha-1 of which 0.8% was in the vegetation.The calcium quantity in 1977 was estimated at 1163 kg Ca ha-1 of which 51% was in vegetation and this had increased to 59% in 2011. There was 1066 kg K ha-1 of which 13.9% was in vegetation rising to 21% in 2011. Magnesium in 1977 was 624 kg Mg ha-1 with little change in 2011. Such quantities in the vegetation make the sites very vulnerable to nutrient loss when vegetation is removed in land use changes.Nutrient turnover was estimated including litterfall and throughfall and, using growth increments, annual uptake. The overall pattern shows long term transfers from the soil to vegetation and cycling is mainly in the soil A horizon. The net losses from the system are small and appear to be related to bedrock chemistry rather than the vegetation. Small catchments do not present an efficient method for studying biogeochemical cycling. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64912
Appears in Collections: 影响、适应和脆弱性
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作者单位: Forsci Pty Ltd, Delhi Corporate, Suite 4.05, 32 Delhi Road, North Ryde, NSW, Australia
Recommended Citation:
Turner J.,Lambert M.. Pattern of carbon and nutrient cycling in a small Eucalyptus forest catchment, NSW[J]. Forest Ecology and Management,2016-01-01,372