Biodiversity and the water cycle: can rewilding mitigate the impacts of hydrological extremes?
生物多样性和水循环:野化能否减轻极端水文的影响?
基本信息
- 批准号:NE/W007460/1
- 负责人:
- 金额:$ 5.1万
- 依托单位:
- 依托单位国家:英国
- 项目类别:Research Grant
- 财政年份:2022
- 资助国家:英国
- 起止时间:2022 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Managing and responding to floods and droughts in the UK demands vast amounts of public spending, and the frequency and severity of extreme high and low flows will increase under future climate change. Many parts of our river catchments have been heavily modified over long timescales, but there is now increasing evidence that working with natural ecosystem processes can deliver multiple environmental, social and economic benefits. The rewilding of degraded landscapes is increasing in popularity globally, and represents a vital tool in reversing biodiversity decline. The changes in biodiversity arising from rewilding also have the potential to drive wider benefits, but many of these remain largely unexplored.Rewilding is the practice of returning modified landscapes to a wilder state and may include the reintroduction of missing animal species. Approaches to rewilding are wide-ranging, but the types of biodiversity change include natural regeneration of grassland, woodland and scrubland, increased biodiversity of soil-dwelling organisms, and reintroduction of large herbivores (e.g. cattle, deer, pigs) and keystone species that have disproportionately large effects on ecosystems relative to their population size (e.g. beavers, wolves). Many of the animals and plants that recolonise rewilding projects are effective 'ecosystem engineers': organisms that are capable of modifying habitats and flows of resources in ecosystems. The presence of ecosystem engineers has been linked with increased success of environmental restoration projects.Importantly, the fundamental principles that underpin rewilding offer potential for much wider-ranging benefits to support freshwater and terrestrial natural capital assets and ecosystem services but understanding of these wider effects is limited. A key knowledge gap is understanding the capacity for rewilded landscapes to modify the water cycle and mitigate hydrological extremes. This would contribute to the evidence base for the economics of biodiversity by delivering more effective water resource and water hazard management. Rewilding, by nature and scale, will alter key elements of the water cycle. Changes to soils, vegetation and river-floodplain systems arising from rewilding will alter the movement and storage of water within landscapes. If rewilding outcomes mean that water takes slower routes through the landscape, it has the potential to make important contributions to flood and drought mitigation. Our project will explore the role that biodiversity gains from landscape rewilding play in modifying the water cycle and mitigating the impacts of hydrological extremes. We will use a review of the existing evidence from rewilding projects, other forms of landscape restoration and sustainable land management, and semi-natural ecosystems, to assess the state of the evidence for key types of rewilding-driven biodiversity change, and identify knowledge gaps and future priorities. In particular, we will answer the questions: 1. How does rewilding alter hydrological processes? 2. How do these effects differ across rewilding scenarios and environmental settings? 3. To what extent have these changes delivered measurable effects on floods and low flows? 4. Where are the gaps in knowledge across questions 1 to 3?Answering these questions will determine the ways in which rewilding influences hydrology and hydrological extremes, support decision-making in rewilding practice across public and private sectors and inform future research priorities and improved monitoring of rewilding programmes.
英国管理和应对洪水和干旱需要大量公共支出,而且在未来气候变化的情况下,极端高和低流量的频率和严重程度将会增加。长期以来,我们河流流域的许多地区都发生了巨大的变化,但现在越来越多的证据表明,利用自然生态系统过程可以带来多种环境、社会和经济效益。退化景观的恢复野化在全球范围内越来越受欢迎,是扭转生物多样性下降的重要工具。野化带来的生物多样性变化也有可能带来更广泛的效益,但其中许多效益在很大程度上尚未得到探索。野化是将经过改造的景观恢复到更野生状态的做法,可能包括重新引入缺失的动物物种。野化方法多种多样,但生物多样性变化的类型包括草原、林地和灌木丛的自然更新,土壤生物多样性的增加,以及大型食草动物(例如牛、鹿、猪)和关键物种的重新引入,这些物种相对于其种群规模对生态系统的影响不成比例地大(例如海狸、狼)。许多重新野化项目的动植物都是有效的“生态系统工程师”:能够改变生态系统中栖息地和资源流动的生物体。生态系统工程师的存在与环境恢复项目的日益成功息息相关。重要的是,支持野化的基本原则为支持淡水和陆地自然资本资产和生态系统服务提供了更广泛效益的潜力,但对这些更广泛影响的了解有限。一个关键的知识差距是了解野生景观改变水循环和缓解水文极端情况的能力。这将通过提供更有效的水资源和水害管理,为生物多样性经济学的证据基础做出贡献。就性质和规模而言,重新野生化将改变水循环的关键要素。野化引起的土壤、植被和河流洪泛区系统的变化将改变景观中水的流动和储存。如果野化的结果意味着水会以较慢的路线穿过景观,那么它就有可能为缓解洪水和干旱做出重要贡献。我们的项目将探讨景观野化所带来的生物多样性在改变水循环和减轻水文极端影响方面所发挥的作用。我们将利用对重新野化项目、其他形式的景观恢复和可持续土地管理以及半自然生态系统的现有证据的审查,评估重新野化驱动的生物多样性变化的关键类型的证据状况,并确定知识差距和未来的优先事项。我们将特别回答以下问题: 1. 野化如何改变水文过程? 2. 这些影响在野化场景和环境设置中有何不同? 3. 这些变化在多大程度上对洪水和低流量产生了可衡量的影响? 4. 问题 1 至 3 的知识差距在哪里?回答这些问题将确定野化影响水文和水文极端情况的方式,支持公共和私营部门野化实践的决策,并为未来的研究重点和改进野化计划的监测提供信息。
项目成果
期刊论文数量(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
The role of rewilding in mitigating hydrological extremes: State of the evidence
- DOI:10.1002/wat2.1710
- 发表时间:
- 期刊:
- 影响因子:0
- 作者:Gemma L. Harvey;Adam T. Hartley;A. Henshaw;Zareena Khan;Stewart J. Clarke;Christopher J. Sandom;Judy England;Sara King;Orlando Venn
- 通讯作者:Gemma L. Harvey;Adam T. Hartley;A. Henshaw;Zareena Khan;Stewart J. Clarke;Christopher J. Sandom;Judy England;Sara King;Orlando Venn
Rewilding and the water cycle
野化和水循环
- DOI:10.1002/wat2.1686
- 发表时间:2023
- 期刊:
- 影响因子:8.2
- 作者:Harvey G
- 通讯作者:Harvey G
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Gemma Louise Harvey其他文献
Gemma Louise Harvey的其他文献
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{{ truncateString('Gemma Louise Harvey', 18)}}的其他基金
Job share: Embedding environmental and geospatial science in nature recovery and rewilding
工作分享:将环境和地理空间科学融入自然恢复和野化中
- 批准号:
NE/Y005163/1 - 财政年份:2024
- 资助金额:
$ 5.1万 - 项目类别:
Research Grant
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