Global warming potential of farming systems across England: possible mitigation and co-benefits for water quality and biodiversity

IF 6.4 1区 农林科学 Q1 AGRONOMY
Yusheng Zhang, Adrian L. Collins
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引用次数: 0

Abstract

Agriculture is a key contributor to gaseous emissions causing climate change, the degradation of water quality, and biodiversity loss. The extant climate change crisis is driving a focus on mitigating agricultural gaseous emissions, but wider policy objectives, beyond net zero, mean that evidence on the potential co-benefits or trade-offs associated with on-farm intervention is warranted. For novelty, aggregated data on farm structure and spatial distribution for different farm types were integrated with high-resolution data on the natural environment to generate representative model farms. Accounting for existing mitigation effects, the Catchment Systems Model was then used to quantify global warming potential, emissions to water, and other outcomes for water management catchments across England under both business-as-usual and a maximum technically feasible mitigation potential scenario. Mapped spatial patterns were overlain with the distributions of areas experiencing poor water quality and biodiversity loss to examine potential co-benefits. The median business-as-usual GWP20 and GWP100, excluding embedded emissions, were estimated to be 4606 kg CO2 eq. ha−1 (inter-quartile range 4240 kg CO2 eq. ha−1) and 2334 kg CO2 eq. ha−1 (inter-quartile range 1462 kg CO2 eq. ha−1), respectively. The ratios of business-as-usual GHG emissions to monetized farm production ranged between 0.58 and 8.89 kg CO2 eq. £−1 for GWP20, compared with 0.53–3.99 kg CO2 eq. £−1 for GWP100. The maximum mitigation potentials ranged between 17 and 30% for GWP20 and 19-27% for GWP100 with both corresponding medians estimated to be ~24%. Here, we show for the first time that the co-benefits for water quality associated with reductions in phosphorus and sediment loss were both equivalent to around a 34% reduction, relative to business-as-usual, in specific management catchment reporting units where excess water pollutant loads were identified. Several mitigation measures included in the mitigation scenario were also identified as having the potential to deliver co-benefits for terrestrial biodiversity.

英格兰农业系统的全球变暖潜力:可能的缓解措施以及对水质和生物多样性的共同效益
农业是造成气候变化、水质退化和生物多样性丧失的气体排放的主要因素。当前的气候变化危机促使人们将重点放在减少农业气体排放上,但除了净零排放之外,更广泛的政策目标意味着有必要证明与农场干预相关的潜在协同效益或权衡。为了新颖,将不同农场类型的农场结构和空间分布的汇总数据与自然环境的高分辨率数据相结合,生成具有代表性的模型农场。考虑到现有的缓解效应,然后使用集水区系统模型来量化在常规商业和最大技术上可行的缓解潜力情景下,英格兰各地的水管理集水区的全球变暖潜势、水排放和其他结果。绘制的空间格局与经历水质差和生物多样性丧失的地区的分布重叠,以检查潜在的共同利益。据估计,不包括嵌入排放的常规业务GWP20和GWP100的中位数分别为4606千克二氧化碳当量ha−1(四分位数范围4240千克二氧化碳当量ha−1)和2334千克二氧化碳当量ha−1(四分位数范围1462千克二氧化碳当量ha−1)。在GWP20中,一切照常营业的温室气体排放量与货币化农业生产的比例在0.58至8.89千克二氧化碳当量英镑−1之间,而在GWP100中,这一比例为0.53至3.99千克二氧化碳当量英镑−1。GWP20的最大缓解潜力介于17%至30%之间,GWP100的最大缓解潜力介于19-27%之间,两者对应的中位数估计为~24%。在这里,我们首次表明,在确定了过量水污染物负荷的特定管理集水区报告单位中,与常规业务相比,与减少磷和沉积物损失相关的水质共同效益均相当于减少约34%。还确定了缓解设想中包括的若干缓解措施有可能为陆地生物多样性带来共同利益。
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来源期刊
Agronomy for Sustainable Development
Agronomy for Sustainable Development 农林科学-农艺学
CiteScore
10.70
自引率
8.20%
发文量
108
审稿时长
3 months
期刊介绍: Agronomy for Sustainable Development (ASD) is a peer-reviewed scientific journal of international scope, dedicated to publishing original research articles, review articles, and meta-analyses aimed at improving sustainability in agricultural and food systems. The journal serves as a bridge between agronomy, cropping, and farming system research and various other disciplines including ecology, genetics, economics, and social sciences. ASD encourages studies in agroecology, participatory research, and interdisciplinary approaches, with a focus on systems thinking applied at different scales from field to global levels. Research articles published in ASD should present significant scientific advancements compared to existing knowledge, within an international context. Review articles should critically evaluate emerging topics, and opinion papers may also be submitted as reviews. Meta-analysis articles should provide clear contributions to resolving widely debated scientific questions.
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