Abstract

The biomass allocation, leaf traits, and the CO₂ assimilation rate in invasive Epilobium adenocaulon Hausskn and E. pseudorubescens A.K. Skvortsov and indigenous E. palustre L. were studied in the Middle Urals. E. adenocaulon had the maximum height, and E. palustre had the largest leaf canopy diameter. The most compact in linear sizes species E. pseudorubescens was characterized by the lowest biomass. The pattern of organ biomass allocation in invasive E. adenocaulon and E. pseudorubescens corresponded to plants with a ruderal strategy, which was expressed in a low proportion of roots and a large proportion of generative organs. Among the studied species, E. adenocaulon was characterized by the largest the stem mass ratio. The indigenous E. palustre had a large proportion of roots and leaves and a smaller proportion of generative organs, which indicated the stress-tolerant properties of this species. In addition to the pattern of biomass allocation, E. palustre differed from the invasive species in a large (30% on average) amount of chlorophyll and 1.2 times less carotenoid content, as well as low photosynthetic activity of chlorophyll. The rate of CO₂ uptake per unit leaf area was the greatest in E. adenocaulon, which had thick leaves with a large leaf mass per area (LMA), exceeding that in species E. palustre and E. pseudorubescens with thin leaves with lower LMA by 1.8 and 1.6 times, respectively. A negative correlation between the CO₂ assimilation rate per 1 g of dry weight and leaf density (LD) (r = –0.78, p < 0.001) predetermined the maximum value of the photosynthesis rate in E. pseudorubescens, which had the least dense leaves. The analysis of the general dataset of the functional traits indicated that the studied species of the Epilobium genus had different ecological strategies: E. palustre—S (stress tolerant), E. adenocaulon—CR (competitive-ruderal strategy), and E. pseudorubescens—R (ruderal species). It is concluded that invasive species do not have a direct negative effect on E. palustre, even being characterized by distinct ecological properties compared to native species. However, owing to the CR strategy, E. adenocaulon is able to invade riparian plant communities when they are affected by disturbing factors, which may lead to a decrease or to disappearance of the indigenous stress-tolerant species E. palustre and thus to its replacement in disturbed communities by the more competitive invasive species E. adenocaulon.

中文翻译：

---

河岸带生态系统上表叶属入侵种与本土种之间的生态分化与植物功能性状相关

摘要

在乌拉尔中部地区研究了入侵性上皮腺腺藻Hausskn和假红孢菌AK Skvortsov和土著E. palustre L.的生物量分配，叶片性状和CO ₂同化率。紫茎泽兰具有最大高度，而palustre则具有最大的叶冠直径。线性大小最紧凑的假单胞菌的特征是生物量最低。侵染性大肠埃希菌和假红孢菌中器官生物量分配的模式对应于具有a养策略的植物，这种植物以低比例的根和大量的生殖器官表达。在所研究的物种中，E。adenocaulon的茎质量比最大。土生的大肠埃希氏菌根和叶的比例较大，而生殖器官的比例较小，这表明该物种的耐胁迫性。除生物量分配的模式外，大肠埃希菌与入侵物种的不同之处在于叶绿素含量高（平均为30％），类胡萝卜素含量低1.2倍，叶绿素的光合活性低。每单位叶面积的CO ₂吸收率最大。E. adenocaulon的叶子厚，每单位面积的叶重（LMA）大，超过了E. palustre和E. pseudorubescens的薄叶，其LMA分别低1.8倍和1.6倍。的CO之间的负相关₂每1g干重，叶密度（LD）的同化率（[R = -0.78，p <0.001）在预定的光合速率的最大值E. pseudorubescens，其具有密度最低的叶子。对功能性状的一般数据集的分析表明，所研究的Epilobium属物种具有不同的生态策略：E. palustre-S（耐压力），E。adenocaulon -CR（竞争性-eral策略）和E. pseudorubescens- R（rud种）。结论是，与本地物种相比，入侵物种对大肠埃希菌没有直接的负面影响，甚至具有独特的生态特性。但是，由于采用了逆转录病毒策略，当它们受到干扰因素的影响时，E。adenocaulon能够入侵河岸植物群落，这可能导致本地耐胁迫物种E. palustre减少或消失，从而导致其被替代。在更具竞争力的入侵物种腺藻中受扰动的社区。