Growth and reproductive responses of Polygonum hydropiper populations to elevational difference associated with flooding
Growth and reproductive responses of Polygonum hydropiper populations to elevational difference associated with flooding
复制标题
水蓼种群的生长和繁殖对洪水相关海拔差异的反应
DOI：
10.1016/j.gecco.2020.e01156
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发表时间：
2020
影响因子：
4
通讯作者：
Yu Fei-Hai
中科院分区：
文献类型：
--
作者：
Wei Guan-Wen;Sun Xin-Sheng;Chen Yu-Han;Luo Fang-Li;Yu Fei-Hai
海拔会极大地影响河岸地区洪水的强度和持续时间，从而可能影响分布在其中的植物的性能。然而，很少有研究探讨河岸植物随海拔差异的表现。本研究比较了分布在中国三峡库区水力波动带10个不同河岸地点低海拔和高海拔地区的河岸植物蓼种群的生长和繁殖特性。地点以及地点与高程之间的交互作用对几乎所有的生长和繁殖都有显着影响。 P 的特征。 Hydropiper，表明海拔的影响在不同地点之间差异很大。在所有地点，高海拔植物的总生物量、茎生物量、根生物量和植物高度均显着高于低海拔植物。相应地，高海拔植物的茎淀粉浓度也明显较高。相比之下，低海拔植物的生物量明显较低，高度较短，叶子较薄；同时它们的生殖分配明显更高，并且在许多地方的发芽速度更快，发芽率更高。因此，低能耗和高繁殖能力可能是低海拔植物对频繁和深度洪水的生存适应。当地条件和/或洪水可能对磷产生强大的选择压力。 Hydropiper，从而导致种内分化。在所有地点，低海拔和高海拔种群对不同的洪水状况表现出不同的生长和繁殖反应。
Elevation can greatly affect both intensity and duration of flooding in riparian areas, and may thus affect the performance of plants distributed therein. However, few studies have examined the performance of riparian plants over elevation difference.This study compared growth and reproductive traits of populations of the riparian speciesPolygonum hydropiperdistributed at low and high elevations of 10 different riparian locations in the hydro-fluctuation belt of the Three Gorges Reservoir Region, China.Both the location and the interaction between location and elevation had significant effects on almost all growth and reproduction traits ofP. hydropiper, suggesting that the effects of elevation varied greatly among different locations. Across all locations, high-elevation plants had significantly higher total biomass, stem biomass, root biomass, and plant height than low-elevation plants. Correspondingly, high-elevation plants also had significantly higher stem starch concentrations. In comparison, low-elevation plants had significantly lower biomass, shorter height, and thinner leaves; while they had significantly higher reproductive allocation, as well as faster germination and higher germination rate at a number of locations. Therefore, low energy consumption and high reproductive capacity could be a survival adaption of low-elevation plants to frequent and deep flooding.Local conditions and/or flooding might impose strong selection pressure onP. hydropiper, thus resulting in intra-specific differentiation. Across all locations, low- and high-elevation populations exhibit different growth and reproduction responses to different flooding regimes.