气候变化领域集成服务门户(CCPortal): Marsh resilience to sea-level rise reduced by storm-surge barriers in the Venice Lagoon

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DOI	10.1038/s41561-021-00853-7
	Marsh resilience to sea-level rise reduced by storm-surge barriers in the Venice Lagoon
	Tognin D.; D’Alpaos A.; Marani M.; Carniello L.
发表日期	2021
ISSN	1752-0894
卷号	14 期号:12
英文摘要	Salt marshes are important coastal habitats and provide ecosystem services to surrounding communities. They are, however, threatened by accelerating sea-level rise and sediment deprivation due to human activity within upstream catchments, which result in their drowning and a reduction in their extent. Rising seas are also leading to an expansion of coastal flooding protection infrastructures, which might also represent another serious if poorly understood threat to salt marshes due to effects on the resuspension and accumulation of sediment during storms. Here, we use observations from the Venice Lagoon (Italy), a back-barrier system with no fluvial sediment input recently protected by storm-surge barriers, to show that most of the salt-marsh sedimentation (more than 70% in this case) occurs due to sediment reworking during storm surges. We also prove that the large, yet episodic storm-driven sediment supply is seriously reduced by operations of storm-surge barriers, revealing a critical competition between the objectives of protection against coastal flooding and preservation of natural ecosystems. Without complementary interventions and management policies that reduce barrier activations, the survival of coastal wetlands is even more uncertain. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	conservation management; flood control; fluvial deposit; human activity; resuspension; reworking; sea level change; sedimentation; storm surge; Italy; Veneto; Venezia [Veneto]; Venice Lagoon
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250827
作者单位	Department of Civil, Environmental, and Architectural Engineering, University of Padova, Padova, Italy; Center for Lagoon Hydrodynamics and Morphodynamics, University of Padova, Padova, Italy; Department of Geosciences, University of Padova, Padova, Italy
推荐引用方式 GB/T 7714	Tognin D.,D’Alpaos A.,Marani M.,et al. Marsh resilience to sea-level rise reduced by storm-surge barriers in the Venice Lagoon[J],2021,14(12).
APA	Tognin D.,D’Alpaos A.,Marani M.,&Carniello L..(2021).Marsh resilience to sea-level rise reduced by storm-surge barriers in the Venice Lagoon.Nature Geoscience,14(12).
MLA	Tognin D.,et al."Marsh resilience to sea-level rise reduced by storm-surge barriers in the Venice Lagoon".Nature Geoscience 14.12(2021).