The mechanism of photosynthetic water niche differentiation between invasive species of Xanthium strumanum subsp.italicum and X.spinosum in the same domain

doi:10.13466/j.cnki.lczyyj.2025.03.010

Abstract

Abstract:

To elucidate the ecological mechanisms underlying the coexistence of two sympatric invasive species,Xanthium strumanum subsp.italicum and X.spinosum,through differentiation in photosynthetic-water utilization strategies,this study was conducted at Hailiu Reservoir in Inner Mongolia.The experimental design included establishing equidistant sampling plots from nearshore to offshore,encompassing monospecific stands(single-species dominant communities)and mixed communities.Leaf photosynthetic diurnal dynamics(net photosynthetic rate P_n,transpiration rate T_r,and stomatal conductance G_s)were measured using a Li-6800 photosynthesis system,and spatial autocorrelation analysis of soil water content was used to construct species distribution and water response curves.Key findings showed that:1)X. strumarium subsp. italicum exhibited a "bimodal" photosynthetic curve,with a maximum P_n of 47.91 μmol/(m²·s).This rate is 178.5% higher compared to that of X.spinosum[17.2 μmol/(m²·s)]and was associated with lower midday photoinhibition.In contrast,X.spinosum achieved a higher photosynthetic rate during morning hours,enabling it to seize an advantage in carbon assimilation early in the day.2)X.strumarium subsp. italicum dominated high-moisture habitats(>20.4%),while X.spinosum prevailed in arid zones(<12.7%),with coexistence occurring within a threshold interval of 14.8%-18.3%.3)X. strumarium subsp. italicum showed linearly increasing WUE with moisture(R²=0.83),indicative of water-conservative strategies,whereas X.spinosum displayed a WUE peak shift at a moisture level of 16.5%,regulated by stomatal oscillation.These results demonstrate that the two invaders achieve niche complementarity through "high photosynthetic efficiency/high transpiration" resource partitioning strategies,with their "photosynthetic-hydrological niche complementarity" mechanism providing a physiological basis for synergistic invasion.The findings offer critical insights for precision management of invasive plants in arid reservoir ecosystems.

Key words: Xanthium strumarium subsp. italicum, Xanthium spinosum, photosynthetic characteristics, soil moisture, niche differentiation, invasion mechanism

CLC Number:

PANG Lidong, WU Baolong, CHEN Li, WANG Qi, PANG Wanlong. The mechanism of photosynthetic water niche differentiation between invasive species of Xanthium strumanum subsp.italicum and X.spinosum in the same domain[J]. Forest and Grassland Resources Research, 2025, (3): 83-91.

Figures/Tables 4

References 30

[1]	WARD N L, MASTERS G I. Linking climate change and species invasion:An illustration using insect herbivores[J]. Global Change Biology, 2007, 13(8):1605-16145. doi: 10.1111/gcb.2007.13.issue-8
[2]	万方浩, 郭建英, 王德辉. 中国外来入侵生物的危害与管理对策[J]. 生物多样性, 2002(1):119-125. doi: 10.17520/biods.2002014
[3]	BOBBINK R, HICKS K, GALLOWAY J, et al. Global assessment of nitrogen deposition effects on terrestrial plant diversity:A dynthesis[J]. Ecological Applications, 2010, 20(1):30-59. doi: 10.1890/08-1140.1
[4]	OLIVER J D. Mile-a-Minute Weed(Polygonum perfoliatum L.),an invasive vine in natural and disturbed sites[J]. Castanea, 1996, 61(3):244-251.
[5]	ANTONELLA P, JOHAN M, CASPER H A. et al. Mechanisms of invasion resistance of aquatic plant communities[J]. Frontiers in Plant Science, 2018, 9:134.
[6]	葛结林, 何家庆, 孙晓方, 等. 入侵植物加拿大一枝黄花对土壤水分变化的生态学响应[J]. 西北植物学报, 2010, 30(3):575-585.
[7]	贾璇, 皇甫超河. 河北地区入侵植物黄顶菊与本地种苍耳光合特性比较[J]. 生物安全学报, 2019, 28(3):217-224.
[8]	宋誉, 郭文锋, 李晓琼. 克隆整合对外来入侵杂草空心莲子草与本土同属种莲子草生长及光合性能的影响比较[[J]. 华南农业大学学报, 2023, 44(4):531-538.
[9]	阿马努拉·依明尼亚孜, 阿地力·沙塔尔, 何健霄, 等. 南方菟丝子寄生对苍耳属三种杂草生长发育的影响[J]. 干旱区资源与环境, 2021, 35(6):170-175.
[10]	肖永康, 何健霄, 隋晓青, 等. 意大利苍耳入侵对本地植物群落物种多样性和稳定性的影响:以乌鲁木齐市为例[J]. 生态学报, 2024, 44(13):5717-5725.
[11]	陶媛媛, 赵玉, 胡云霞, 等. 模拟氮沉降对恶性入侵植物刺苍耳幼苗生长特征的影响[J]. 生态学杂志, 2020, 39(12):3971-3978.
[12]	宋珍珍, 谭敦炎, 周桂玲. 入侵植物刺苍耳在新疆的分布及其群落特征[J]. 西北植物学报, 2012, 32(7):1448-1453.
[13]	董芳慧, 刘影, 蒋梦娇, 等. 入侵植物刺苍耳对小麦和苜蓿种子的化感作用[J]. 干旱区研究, 2014, 31(3):530-535.
[14]	何影, 马淼. 入侵植物意大利苍耳种子萌发对环境因子的响应[J]. 生态学报, 2018, 38(4):1226-1234.
[15]	林慧, 张明莉, 王鹏鹏, 等. 外来入侵植物意大利苍耳的传粉生态学特性[J]. 生态学报, 2018, 38(5):1810-1816.
[16]	张明莉, 常宏磊, 马淼. 基于Biolog 技术的外来种意大利苍耳与本地种苍耳根际土壤微生物功能多样性的比较[J]. 草业学报, 2017, 26(10):179-187. doi: 10.11686/cyxb2016500
[17]	赵利清, 臧春鑫, 杨劼. 侵入种刺苍耳在内蒙古和宁夏的分布[J]. 内蒙古大学学报(自然科学版), 2006(3):308-310.
[18]	PATANKAR R, MORRAZAVI B, OBERBAUER S F. Leaf-level physiological responses of native and invasive plants to experimental forest canopy opening. Oecologia, 2009, 161(3):553-562.
[19]	郭卫华, 李波, 黄永梅, 等. 不同程度的水分胁迫对沙棘幼苗生理生态特征的影响[J]. 植物学报, 2003, 45(10):1238-1244.
[20]	张治安, 杨福, 陈展宇, 等. 菰叶片净光合速率日变化及其与环境因子的相互关系[J]. 中国农业科学, 2006, 39(3):502-509.
[21]	MAHMUD K, MEDLYN B E, DUURSMA R A, et al. Inferring the effects of sink strength on plant carbon balance processes from experimental measurements[J]. Biogeosciences, 2018, 15(13):4003-4018. doi: 10.5194/bg-15-4003-2018
[22]	王春晓, 钟址非, 钱志军, 等. 福州琅岐岛不同林下外来植物入侵对比研究[J]. 西南林业大学学报(自然科学), 2024, 44(5):44-53.
[23]	CATFORD J A, DOWNES B J, GIPPEL C J, et al. Flow regulation reduces native plant cover and facilitates exotic invasion in tiparian wetlands[J]. Journal of Applied Ecology, 2011, 48(2):432-442. doi: 10.1111/jpe.2011.48.issue-2
[24]	CASANOVA M T, BROCK M A. How do depth,duration and frequency of flooding influence the establishment of wetland plant communities?[J]. Plant Ecology, 2000, 147(2):237-250. doi: 10.1023/A:1009875226637
[25]	BARNEY J N, MANN J J, KYSER G B, et al. Assessing habitat susceptibility and resistance to invasion by the bioenergy crops switchgrass and miscanthus×giganteus in California[J]. Biomass and Bioenergy, 2012, 40:143-154. doi: 10.1016/j.biombioe.2012.02.013
[26]	李杰, 马森. 新疆外来入侵植物意大利苍耳和刺苍耳种子的越冬性能[J]. 生态学报, 2017, 37(21):7181-7186.
[27]	杨阳, 赵鸿, 唐国瑛, 等. 半干旱区马铃薯叶片光合生理参数的土壤水分阈值效应[J]. 生态学杂志, 2023, 42(11):2622-2629.
[28]	蒋高明. 植物生理生态学[M]. 北京: 高等教育出版社, 2004.
[29]	杨司睿, 范井伟, 孙永强, 等. 罗布泊腹地人工植被梭梭的光学特性及其对干旱胁迫的响应[J]. 干旱区研究, 2018, 35(2):379-386. doi: 10.13866/j.azr.2018.02.16
[30]	黄孟秋, 李景吉, 陈欣, 等. 加拿大一枝黄花瘦果萌发对干旱胁迫响应研究[J]. 生态科学, 2025, 44(1):156-164.