Nitrogen addition and fungal symbiosis alter early dune plant succession

0579844 - MBÚ 2024 RIV DE eng J - Článek v odborném periodiku
Garces, K. R. - Bell-Dereske, Lukas Patrick - Rudgers, J. A. - Emery, S. M.
Nitrogen addition and fungal symbiosis alter early dune plant succession.
Oecologia. Roč. 201, č. 4 (2023), s. 1067-1077. ISSN 0029-8549. E-ISSN 1432-1939
Institucionální podpora: RVO:61388971
Klíčová slova: species richness * lake-michigan * ammophila-breviligulata * soil characteristics * invasive plant * sand dunes * deposition * impacts * diversity * climate * Ammophila * Epichloe * Fungi * Mutualism * Nitrogen deposition
Obor OECD: Microbiology
Impakt faktor: 2.7, rok: 2022
Způsob publikování: Open access
https://link.springer.com/article/10.1007/s00442-023-05362-5

Anthropogenic nitrogen (N) enrichment can have complex effects on plant communities. In low-nutrient, primary successional systems such as sand dunes, N enrichment may alter the trajectory of plant community assembly or the dominance of foundational, ecosystem-engineering plants. Predicting the consequences of N enrichment may be complicated by plant interactions with microbial symbionts because increases in a limiting resource, such as N, could alter the costs and benefits of symbiosis. To evaluate the direct and interactive effects of microbial symbiosis and N addition on plant succession, we established a long-term field experiment in Michigan, USA, manipulating the presence of the symbiotic fungal endophyte Epichloe amarillans in Ammophila breviligulata, a dominant ecosystem-engineering dune grass species. From 2016 to 2020, we implemented N fertilization treatments (control, low, high) in a subset of the long-term experiment. N addition suppressed the accumulation of plant diversity over time mainly by reducing species richness of colonizing plants. However, this suppression occurred only when the endophyte was present in Ammophila. Although Epichloe enhanced Ammophila tiller density over time, N addition did not strongly interact with Epichloe symbiosis to influence vegetative growth of Ammophila. Instead, N addition directly altered plant community composition by increasing the abundance of efficient colonizers, especially C-4 grasses. In conclusion, hidden microbial symbionts can alter the consequences of N enrichment on plant primary succession.
Trvalý link: https://hdl.handle.net/11104/0348637