Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00442-012-2512-8 |
Provisioning of bioavailable carbon between the wet and dry phases in a semi-arid floodplain | |
Baldwin, Darren S.1,2; Rees, Gavin N.1,2; Wilson, Jessica S.1; Colloff, Matthew J.3; Whitworth, Kerry L.1; Pitman, Tara L.1; Wallace, Todd A.1,2,4 | |
通讯作者 | Baldwin, Darren S. |
来源期刊 | OECOLOGIA
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ISSN | 0029-8549 |
出版年 | 2013 |
卷号 | 172期号:2页码:539-550 |
英文摘要 | Ecosystem functioning on arid and semi-arid floodplains may be described by two alternate traditional paradigms. The pulse-reserve model suggests that rainfall is the main driver of plant growth and subsequent carbon and energy reserve formation in the soil of arid and semi-arid regions. The flood pulse concept suggests that periodic flooding facilitates the two-way transfer of materials between a river and its adjacent floodplain, but focuses mainly on the period when the floodplain is inundated. We compared the effects of both rainfall and flooding on soil moisture and carbon in a semi-arid floodplain to determine the relative importance of each for soil moisture recharge and the generation of a bioavailable organic carbon reserve that can potentially be utilised during the dry phase. Flooding, not rainfall, made a substantial contribution to moisture in the soil profile. Furthermore, the growth of aquatic macrophytes during the wet phase produced at least an order of magnitude more organic material than rainfall-induced pulse-reserve responses during the dry phase, and remained as recognizable soil carbon for years following flood recession. These observations have led us to extend existing paradigms to encompass the reciprocal provisioning of carbon between the wet and dry phases on the floodplain, whereby, in addition to carbon fixed during the dry phase being important for driving biogeochemical transformations upon return of the next wet phase, aquatic macrophyte carbon fixed during the wet phase is recognized as an important source of energy for the dry phase. Reciprocal provisioning presents a conceptual framework on which to formulate questions about the resistance and ecosystem resilience of arid and semi-arid floodplains in the face of threats like climate change and alterations to flood regimes. |
英文关键词 | Pulse-reserve Flood pulse concept Soil carbon Ecosystem resilience Rainfall |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000319077100023 |
WOS关键词 | EUCALYPTUS-CAMALDULENSIS FOREST ; MAJOR RIVER SYSTEM ; ORGANIC-MATTER ; FOOD WEBS ; MURRUMBIDGEE RIVER ; NUTRIENT DYNAMICS ; PLANT-RESPONSES ; ARID AUSTRALIA ; RIPARIAN ZONES ; WATER-QUALITY |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | Commonwealth Scientific and Industrial Research Organisation |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/179062 |
作者单位 | 1.La Trobe Univ, Murray Darling Freshwater Res Ctr, Wodonga, Vic 3689, Australia; 2.La Trobe Univ, CSIRO Land & Water, Wodonga, Vic 3689, Australia; 3.CSIRO Ecosyst Sci, Canberra, ACT 2601, Australia; 4.Univ Adelaide, Water Res Ctr, Adelaide, SA 5005, Australia |
推荐引用方式 GB/T 7714 | Baldwin, Darren S.,Rees, Gavin N.,Wilson, Jessica S.,et al. Provisioning of bioavailable carbon between the wet and dry phases in a semi-arid floodplain[J]. Commonwealth Scientific and Industrial Research Organisation,2013,172(2):539-550. |
APA | Baldwin, Darren S..,Rees, Gavin N..,Wilson, Jessica S..,Colloff, Matthew J..,Whitworth, Kerry L..,...&Wallace, Todd A..(2013).Provisioning of bioavailable carbon between the wet and dry phases in a semi-arid floodplain.OECOLOGIA,172(2),539-550. |
MLA | Baldwin, Darren S.,et al."Provisioning of bioavailable carbon between the wet and dry phases in a semi-arid floodplain".OECOLOGIA 172.2(2013):539-550. |
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Provisioning of bioa(651KB) | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 |
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