Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| DOI | 10.1016/j.scitotenv.2023.165868 |
Licence  |
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| Title (Primary) | Nitrogen addition increases mass loss of gymnosperm but not of angiosperm deadwood without changing microbial communities |
| Author | Roy, F.; Ibayev, O.; Arnstadt, T.; Bässler, C.; Borken, W.; Groß, C.; Hoppe, B.; Hossen, S.; Kahl, T.; Moll, J.; Noll, M.; Purahong, W.; Schreiber, J.; Weisser, W.W.; Hofrichter, M.; Kellner, H. |
| Source Titel | Science of the Total Environment |
| Year | 2023 |
| Department | BOOEK |
| Volume | 900 |
| Page From | art. 165868 |
| Language | englisch |
| Topic | T5 Future Landscapes |
| Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0048969723044935-mmc1.docx |
| Keywords | Anthropogenic nitrogen; Respiration; Lignocellulolytic enzymes; Bacterial and fungal community; Carbon cycle; White-rot fungi |
| Abstract | Enhanced nitrogen (N) deposition due to
combustion of fossil fuels and agricultural fertilization is a global
phenomenon which has severely altered carbon (C) and N cycling in temperate
forest ecosystems in the northern hemisphere. Although deadwood holds a
substantial amount of C in forest ecosystems and thus plays a crucial role in
nutrient cycling, the effect of increased N deposition on microbial processes and
communities, wood chemical traits and deadwood mass loss remains unclear. Here,
we simulated high N deposition rates by adding reactive N in form of
ammonium-nitrate (40 kg N ha−1 yr−1) to deadwood of 13 temperate tree species
over nine years in a field experiment in Germany. Non-treated deadwood from the
same logs served as control with background N deposition. Our results show that
chronically elevated N levels alters deadwood mass loss alongside respiration,
enzymatic activities and wood chemistry depending on tree clade and species. In
gymnosperm deadwood, elevated N increased mass loss by +38 %, respiration by
+37 % and increased laccase activity 12-fold alongside increases of white-rot
fungal abundance +89 % (p = 0.03). Furthermore, we observed marginally
significant (p = 0.06) shifts of bacterial communities in gymnosperm deadwood.
In angiosperm deadwood, we did not detect consistent effects on mass loss,
physico-chemical properties, extracellular enzymatic activity or changes in
microbial communities except for changes in abundance of 10 fungal OTUs in
seven tree species and 28 bacterial OTUs in 10 tree species. We conclude that N
deposition alters decomposition processes exclusively in N limited gymnosperm
deadwood in the long term by enhancing fungal activity as expressed by
increases in respiration rate and extracellular enzyme activity with minor
shifts in decomposing microbial communities. By contrast, deadwood of
angiosperm tree species had higher N concentrations and mass loss as well as community
composition did not respond to N addition. |
| Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=27511 |
| Roy, F., Ibayev, O., Arnstadt, T., Bässler, C., Borken, W., Groß, C., Hoppe, B., Hossen, S., Kahl, T., Moll, J., Noll, M., Purahong, W., Schreiber, J., Weisser, W.W., Hofrichter, M., Kellner, H. (2023): Nitrogen addition increases mass loss of gymnosperm but not of angiosperm deadwood without changing microbial communities Sci. Total Environ. 900 , art. 165868 10.1016/j.scitotenv.2023.165868 |
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