globalchange  > 气候减缓与适应
DOI: 10.1016/j.agee.2019.04.001
WOS记录号: WOS:000482173600001
论文题名:
Agroecosystem resilience in response to extreme winter flooding
作者: Harvey, Rachel J.1; Chadwick, David R.1; Rafael Sanchez-Rodriguez, Antonio1,2; Jones, Davey L.1,3
通讯作者: Rafael Sanchez-Rodriguez, Antonio
刊名: AGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN: 0167-8809
EISSN: 1873-2305
出版年: 2019
卷: 279, 页码:1-13
语种: 英语
英文关键词: Extreme weather ; Nutrient cycling ; PLFAs ; Waterlogging ; Flooding
WOS关键词: SOIL COMPACTION ; MICROBIAL COMMUNITIES ; WATER INFILTRATION ; PLANTS ; INVERTEBRATES ; EARTHWORMS ; PATTERNS ; STRESS ; GROWTH ; FORMS
WOS学科分类: Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS研究方向: Agriculture ; Environmental Sciences & Ecology
英文摘要:

Evidence suggests that climate change is increasing the frequency of extreme weather events (e.g. excessive rainfall, heat, wind). The winter of 2013-14 saw exceptional levels of rainfall across the UK leading to extreme and prolonged flooding (up to 3 months with floodwater depths up to 3 m) in several low-lying agricultural areas (e.g. Somerset Levels, Thames Valley). The impact of extreme flooding and the speed of ecosystem recovery at the field-scale, however, remain poorly understood. The main objectives of this study were therefore to: (1) assess the effect of this extreme winter flooding event on a range of soil physical, chemical and biological quality indicators at 15 flood-affected sites (arable and grassland), (2) determine if these changes in soil health were reversible in the short term ( < 1 year), and (3) to evaluate the effectiveness of different mechanical interventions (sward-lifting, subsoiling, slot-seeding and aerating) to accelerate the amelioration of the damage caused by winter flooding at 2 of the 15 sites. Once the floodwater had receded (April 2014), we found that several of the measured soil quality indicators were negatively affected in the flooded areas in comparison with non flooded areas. This included a decrease in soil bulk density (by 19%), soil pH (by 0.4 units), and available P (by up to 42%). Flooding increased soil microbial biomass (60%), induced a shift in soil microbial community structure and reduced earthworm numbers. After 8 months of recovery, only soil pH remained significantly reduced (by 0.3 units) in the flooded areas in comparison to the unflooded areas. Flooding had a negative impact on the overlying vegetation at the arable sites (biomass production was reduced by between 19 and 34%) but had no major impact at the grassland sites in the long-term. In the flood amelioration experiment, the subsoiled plots produced grass with a higher nutrient content (e.g. N - up to 35%, Ca - up to 19% and Mg - up to 58%). However, the four different interventions appeared to have little positive impact on most of the soil quality indicators measured. In conclusion, extreme winter flooding was found to induce short-term alterations in key soil quality indicators and to destroy winter crops, although these effects did not persist in the longer term. Our results therefore indicate that the temperate agroecosystems evaluated here were highly resilient to winter flood stress and that recovery to a pre-flood state could be achieved within 1 year. Improved management strategies are still needed to speed up the rate of recovery after flood events to facilitate a faster return to agricultural production.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/124661
Appears in Collections:气候减缓与适应

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作者单位: 1.Bangor Univ, Environm Ctr Wales, Deiniol Rd, Bangor LL57 2UW, Gwynedd, Wales
2.Univ Cordoba, Agron Dept, Campus Rabanales,Edificio C4 Celestino Mutis, E-14071 Cordoba, Spain
3.Univ Western Australia, UWA Sch Agr & Environm, Crawley, WA 6009, Australia

Recommended Citation:
Harvey, Rachel J.,Chadwick, David R.,Rafael Sanchez-Rodriguez, Antonio,et al. Agroecosystem resilience in response to extreme winter flooding[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2019-01-01,279:1-13
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