SwePub
Sök i LIBRIS databas

  Extended search

WFRF:(Rappe George Martin)
 

Search: WFRF:(Rappe George Martin) > Indications that lo...

  • Rappe George, MartinSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment (author)

Indications that long-term nitrogen loading limits carbon resources for soil microbes

  • Article/chapterEnglish2017

Publisher, publication year, extent ...

  • Elsevier BV,2017

Numbers

  • LIBRIS-ID:oai:gup.ub.gu.se/259618
  • https://gup.ub.gu.se/publication/259618URI
  • https://doi.org/10.1016/j.soilbio.2017.07.015DOI
  • https://res.slu.se/id/publ/88800URI

Supplementary language notes

  • Language:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Microbial communities in the organic horizon (O-horizon) of forest soils play key roles in terrestrial nitrogen (N) cycling, but effects on them of long-term high N loading, by N deposition or experimental addition, are not fully understood. Thus, we investigated N-loading effects on soil microbial biomass N, carbon (C) and phosphorus stoichiometry, hydrolytic and oxidative enzymes, community composition (via phospholipid fatty acids, PLFA) and soil chemistry of the O-horizon in study plots of three well-studied experimental Norway spruce (Picea abies) forests in Sweden and the Czech Republic. These forests span substantial gradients in current N deposition, experimental N addition and nitrate (NO3 −) leaching. Current N deposition ranges from ∼3 kg ha−1 year−1 of N in central Sweden (Stråsan) to ∼15 kg ha−1 year−1 of N in SW Sweden (Skogaby) and Czech Republic (Čertovo). Furthermore, accumulated historical N loading during 1950–2000 (which include experimental N addition performed at Stråsan and Skogaby) ranged ∼200–∼2000 kg ha−1 of N. Across all sites and treatments, current NO3 − leaching ranged from low (∼0.1 kg ha−1 year−1 of N) at Stråsan, to high (∼15 kg ha−1 year−1 of N) at Skogaby and Čertovo. We found significantly lower C/N ratios and greater amounts of extractable inorganic N species in the forest soils’ O-horizons at the high N loading plots. Microbial biomass and basal respiration decreased under experimental N addition treatments and tended to decrease with increased N deposition. Similarly, activities of hydrolytic enzyme activity associated with N acquisition were lower, although differences in activities at specific sites with the highest and intermediate historical N deposition levels failed statistical significance. Conversely, activities of soil hydrolytic enzymes associated with C acquisition were greater in study plots exposed high N loading. PLFA profiles indicated shifts in microbial community composition induced by long-term N load, towards higher and lower relative abundance of Gram-positive and Gram-negative bacteria, respectively (but no changes in fungal relative abundance). Taken together, our results suggest that long-term N loading of N-limited Norway spruce forests aggravates limitation of other resources, likely of C, for soil microbial communities. Although microbial variables in the soil O-horizon differed between plots exposed to low and high current N loading, microbial variables in plots that leached small amounts and large amounts of NO3 − exposed to high N load were similar. © 2017

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Choma, M. (author)
  • Capek, PetrUniversity of South Bohemia in České Budějovice(Swepub:slu)96420 (author)
  • Börjesson, GunnarSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)49477 (author)
  • Kaštovská, E. (author)
  • Santruckova, HanaUniversity of South Bohemia in České Budějovice(Swepub:slu)97544 (author)
  • Gärdenäs, Annemieke I.,1962Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences,Institutionen för mark och miljö,Department of Soil and Environment(Swepub:slu)51161 (author)
  • Sveriges lantbruksuniversitetInstitutionen för mark och miljö (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Soil Biology and Biochemistry: Elsevier BV115, s. 310-3210038-07171879-3428

Internet link

Find in a library

To the university's database

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Close

Copy and save the link in order to return to this view