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Diverse Interactions: Root-Nodule Formation and Herb-Layer Composition in Black Locust (Robinia pseudoacacia) Stands
被引:1
|作者:
Csiszar, Agnes
[1
]
Winkler, Daniel
[2
]
Bartha, Denes
[1
]
Zagyvai, Gergely
[1
]
机构:
[1] Inst Environm Protect & Nat Conservat, H-9400 Sopron, Hungary
[2] Univ Sopron, Inst Wildlife Management & Wildlife Biol, H-9400 Sopron, Hungary
来源:
PLANTS-BASEL
|
2023年
/
12卷
/
18期
关键词:
biological indication;
invasive tree species;
diversity;
nitrogen fixation;
root-nodule;
INCREASED ATMOSPHERIC CO2;
N-FIXING TREE;
NITROGEN-FIXATION;
LOESS PLATEAU;
DINITROGEN FIXATION;
SOIL;
FOREST;
NODULATION;
NITRATE;
CARBON;
D O I:
10.3390/plants12183253
中图分类号:
Q94 [植物学];
学科分类号:
071001 ;
摘要:
The black locust (Robinia pseudoacacia L.) is the second-most abundant deciduous tree in forest plantations, and one of the most important invasive woody species worldwide. The species has a strong transformer capacity, especially expressed by its nitrogen enrichment effect caused by nitrogen-fixing bacteria living in its root-nodules. The aim of this study was to explore the mutually interacting factors of nitrogen-fixing root-nodules, site characteristics, and herb-layer composition of 28 North Hungarian black locust stands. In the herb-layers of the study sites, a total of 121 plant species were identified, representing a relatively low species richness. The studied black locust stands showed high variability both in their herb-layer compositions and root-nodule formation, but no clear relationship could be demonstrated between these characteristics. The PCA component with which the species richness and Shannon-Wiener diversity index were strongly correlated was negatively associated with all root-nodule parameters (number, surface area, and weight), supporting the biodiversity-reducing effect of black locust by its nitrogen-fixing bacteria. All of the root-nodule parameters were negatively correlated with the PCA factor predominantly determined by stand age, confirming that the root-nodule biomass decreases as time progresses.
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