期刊
WETLANDS
卷 39, 期 2, 页码 275-290出版社
SPRINGER
DOI: 10.1007/s13157-018-1121-7
关键词
Non-migrating bar; Uprooting; Burial; Riparian vegetation; Seedlings
资金
- Masterplan Plan Loire Grandeur Nature - FEDER [34971]
- Agence de l'Eau Loire-Bretagne [100392601]
- Etablissement Public Loire [11-DR-RD-015]
- Region Centre Val de Loire
- BioMareau II project [Feder 2016-EX00604 - Prog 9086 - Region Centre Val de Loire: 2016-00108343]
- Program ARD Intelligence des Patrimoines
Populus nigra seedling survival to flood stresses during their first stage of development was analyzed in the Loire River, France. We related bar dynamics (assessed from bathymetrical, topographical, flow velocity, scour chains, and sediment grain size surveys) to seedling survival. The study highlights (i) the influence of flood succession and flood stages on seedling survival after establishment, (ii) the spatial distribution of fluvial processes at the bar scale and their relative contribution to seedling mortality, (iii) threshold values for each process. At the bar scale, 28% of mortality is explained by uprooting associated with erosion of sediments. To a lesser extent, uprooting by drag force applied on the stems and burying by sediments also contribute to seedling mortality. The majority of seedling mortality is ultimately due to a combination of erosion and burial (50.6%) during flood events. The relative contribution of each process depends on the combination and phasing of erosion and deposition processes, sediment supply (quantity and grain size), and flow velocity governed by hydrological variations. Based on the results of this study we hypothesize that the survival of seedlings during floods may be a function of local processes involved in bar dynamics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据