Biomechanical properties of the emergent aquatic macrophyte Sparganium erectum: Implications for fine sediment retention in low energy rivers
Biomechanical properties of the emergent aquatic macrophyte Sparganium erectum: Implications for fine sediment retention in low energy rivers
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新兴水生植物直立三棱的生物力学特性：对低能量河流中细泥沙滞留的影响
DOI：
10.1016/j.ecoleng.2011.06.015
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发表时间：
2011
影响因子：
3.8
通讯作者：
Liffen T
中科院分区：
文献类型：
--
作者：
Liffen T
本文研究了挺水植物黑三棱的生物力学特性。我们目前的观察调整的物理特性和生物力学性能的S。在生长季节（4月至11月）从黑水河，英国。当将牵引装置连接到植物茎以测量其对拔出的抗性时，个体植物在其地上和地下生物量中显示出显著的强度（当茎从地下生物量脱离时的茎强度中值为78 N，根茎强度中值为39 N）和对拔出的高抗性（当整个植物拔出时的拔出抗性中值为114 N）。这为该物种提供了保护和加固通常较软的粉质沉积物的潜力，该沉积物通常保留在较低能量河流环境中，其根茎和根在沉积物中发育。在生长季节的开始和结束时，植物茎在植物被连根拔起之前有断裂的倾向，但是茎在生长季节中期具有足够的强度以使植物连根拔起占主导地位。这确保了根茎和根系在其生长的粉质沉积物没有受到地面生物量的保护时保持相对不受干扰。相比之下，根茎强度保持相对不变，通过生长季节，支持植物的潜力，有一个保护/加强作用的细沉积物通过冬季时，地上生物量是缺席。
This paper is concerned with the biomechanical properties of the emergent aquatic macrophyte, Sparganium erectum. We present observations of adjustments in the physical characteristics and biomechanical properties of S. erectum during the growing season (April–November) from the River Blackwater, UK. When a pulling device is attached to plant stems to measure their resistance to uprooting, individual plants show remarkable strength in their above- and below-ground biomass (median stem strength when stems break away from the underground biomass, 78N, median rhizome strength, 39N) and high resistance to uprooting (median uprooting resistance when entire plants uproot, 114N). This provides the potential for the species to protect and reinforce the generally soft, silty sediments that it often retains and within which its rhizomes and roots develop in lower energy river environments. There is a propensity for plant stems to break before the plant is uprooted at the beginning and end of the growth season, but for the stems to have sufficient strength in mid season for plant uprooting to dominate. This ensures that rhizome and root systems remain relatively undisturbed at times when the silty sediments in which they grow are poorly protected by above-ground biomass. In contrast, rhizome strength remains comparatively invariant through the growing season, supporting the plant's potential to have a protective/reinforcing effect on fine sediments through the winter when above ground biomass is absent.
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影响因子：
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