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Publication Type J
Authors Harper, RJ; Okom, AEA; Stilwell, AT; Tibbett, M; Dean, C; George, SJ; Sochacki, SJ; Mitchell, CD; Mann, SS; Dods, K
Author Full Name Harper, R. J.; Okom, A. E. A.; Stilwell, A. T.; Tibbett, M.; Dean, C.; George, S. J.; Sochacki, S. J.; Mitchell, C. D.; Mann, S. S.; Dods, K.
Title Reforesting degraded agricultural landscapes with Eucalypts: Effects on carbon storage and soil fertility after 26 years
Source AGRICULTURE ECOSYSTEMS & ENVIRONMENT
Language English
Document Type Article
Author Keywords Carbon sequestration; Biodiversity restoration; Watershed management
Keywords Plus VENTILATED-CHAMBER TECHNIQUE; SOUTH-WESTERN AUSTRALIA; WOODY PLANT INVASION; MM RAINFALL REGION; LITTER DECOMPOSITION; EASTERN AUSTRALIA; TREE PLANTATION; ORGANIC-MATTER; FOREST; SALINITY
Abstract In the Western Australian wheatbelt, the restoration of native eucalypt forests for managing degraded agricultural landscapes is a critical part of managing dryland salinity and rebuilding biodiversity. Such reforestation will also sequester carbon. Whereas most investigative emphasis has been on carbon stored in biomass, the effects of reforestation on soil organic carbon (SOC) stores and fertility are not known. Two 26 year old reforestation experiments with four Eucalyptus species (E. cladocalyx var nana, E. occidentalis, E. sargentii and E. wandoo) were compared with agricultural sites (Field). SOC stores (to 0.3 m depth) ranged between 33 and 55 Mg ha(-1), with no statistically significant differences between tree species and adjacent farmland. Farming comprised crop and pasture rotations. In contrast, the reforested plots contained additional carbon in the tree biomass (23-60 Mg ha(-1)) and litter (19-34 Mg ha(-1)), with the greatest litter accumulation associated with E. sargentii. Litter represented between 29 and 56% of the biomass carbon and the protection or utilization of this litter in fire-prone, semi-arid farmland will be an important component of carbon management. Exch-Na and Exch-Mg accumulated under E. sargentii and E. occidentalis at one site. The results raise questions about the conclusions of SOC sequestration studies following reforestation based on limited sampling and reiterate the importance of considering litter in reforestation carbon accounts. (C) 2012 Elsevier B.V. All rights reserved.
Author Address [Harper, R. J.; Sochacki, S. J.; Mitchell, C. D.; Mann, S. S.] Murdoch Univ, Sch Environm Sci, Alcoa Chair Sustainable Water Management, Murdoch, WA 6150, Australia; [Harper, R. J.; Okom, A. E. A.; Stilwell, A. T.] Forest Prod Commiss, Perth, WA 6849, Australia; [Tibbett, M.; George, S. J.] Univ Western Australia, Sch Earth & Environm, Crawley, WA 6009, Australia; [Tibbett, M.] Cranfield Univ, Natl Soil Resources Inst, Dept Environm Sci & Technol, Sch Appl Sci, Cranfield MK43 0AL, Beds, England; [Dean, C.] Univ Tasmania, Sch Geog & Environm Studies, Hobart, Tas 7001, Australia; [Mann, S. S.; Dods, K.] ChemCentre, Bentley, WA 6983, Australia
Reprint Address Harper, RJ (reprint author), Murdoch Univ, Sch Environm Sci, Alcoa Chair Sustainable Water Management, South St, Murdoch, WA 6150, Australia.
E-mail Address r.harper@murdoch.edu.au
ResearcherID Number Tibbett, Mark/C-8425-2013
ORCID Number Tibbett, Mark/0000-0003-0143-2190
Funding Agency and Grant Number Natural Heritage Trust - Farm Forestry Program [983197]
Funding Text This work was partly undertaken as a component of the Natural Heritage Trust - Farm Forestry Program Project 983197
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Cited Reference Count 81
Times Cited 26
Total Times Cited Count (WoS, BCI, and CSCD) 28
Publisher ELSEVIER SCIENCE BV
Publisher City AMSTERDAM
Publisher Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN 0167-8809
29-Character Source Abbreviation AGR ECOSYST ENVIRON
ISO Source Abbreviation Agric. Ecosyst. Environ.
Publication Date DEC 1
Year Published 2012
Volume 163
Special Issue SI
Beginning Page 3
Ending Page 13
Digital Object Identifier (DOI) 10.1016/j.agee.2012.03.013
Page Count 11
Web of Science Category Agriculture, Multidisciplinary; Ecology; Environmental Sciences
Subject Category Agriculture; Environmental Sciences & Ecology
Document Delivery Number 068TX
Unique Article Identifier WOS:000313390200002
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