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盐分介导下芦苇对不同邻体植物的表型可塑性响应
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作者 Huijia Song Xiao Guo +4 位作者 jingcheng yang Lele Liu Mingyan Li Jingfeng Wang Weihua Guo 《Journal of Plant Ecology》 SCIE CSCD 2024年第3期95-103,共9页
随着滨海湿地生态系统盐胁迫增加,群落中的植物同时受到盐胁迫和植物相互作用的影响。非生物因素干扰植物之间竞争和促进效应的稳定,使植物产生复杂的表型可塑性响应。探讨不同的邻体物种及对性状可塑性的影响将会扩展胁迫梯度假说,深... 随着滨海湿地生态系统盐胁迫增加,群落中的植物同时受到盐胁迫和植物相互作用的影响。非生物因素干扰植物之间竞争和促进效应的稳定,使植物产生复杂的表型可塑性响应。探讨不同的邻体物种及对性状可塑性的影响将会扩展胁迫梯度假说,深入理解盐沼湿地的物种分布特征。本研究开展温室控制实验,探究盐胁迫下(0和10 g/L)芦苇(Phragmites australis)对3种功能类型7种邻体植物(同种植物、禾草类植物和杂草类植物)的表型可塑性响应。实验测量了株高、基径、密度、叶厚度、比叶面积、总生物量和各部分生物量等性状,计算了邻体效应指数(基于生物量)和相对表型可塑性指数。结果表明,盐分显著降低了芦苇的生物量、株高、密度和基径。邻体植物的功能类型显著影响芦苇的生长性状。盐分为0 g/L时,禾草类植物对芦苇形成负的竞争效应,但在10 g/L盐分下,这种负效应转变为正的促进作用。芦苇的生长性状对盐分和竞争具有可塑性反应,如增加地下生物量以获得更多的水分和资源,可塑性指数在盐分条件下比竞争条件下更高。总之,植物-植物相互作用对胁迫的响应随植物功能类型和性状可塑性而异。 展开更多
关键词 功能性状 表型可塑性 相互作用 耐盐性 胁迫梯度假说
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The role of an integrated logistics and procurement service offered by a 3PL firm in supply chain 被引量:2
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作者 jingcheng yang Kai Yu 《Journal of Management Analytics》 EI 2019年第1期49-66,共18页
As an integrated part in supply chain,third-party logistics(3PL)has intrinsic connections with upstream manufacturer and downstream retailer.Using a Stackelberg game model consisting of a manufacturer,a retailer and a... As an integrated part in supply chain,third-party logistics(3PL)has intrinsic connections with upstream manufacturer and downstream retailer.Using a Stackelberg game model consisting of a manufacturer,a retailer and a 3PL to explicitly capture the interaction of firms’operations decisions,this paper attempts to better understand the role of integrated logistics and procurement service(ILPS)provided by a 3PL firm in supply chain management.Compared with a supply chain without ILPS,a Pareto region,in which all the supply chain members benefit from working with a 3PL firm offering ILPS,is disclosed.We also show that the Pareto region is more likely to occur with higher demand uncertainty.Finally,we reveal that the manufacturer obtains the highest profit in the Pareto region,and that the retailer can improve his profit share as the standard deviation of demand increases. 展开更多
关键词 supply chain management third-party logistics Stackelberg game Pareto region integrated logistics and procurement service
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