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Inorganic and organic nitrogen acquisition by a fern Dicranopteris dichotoma in a subtropical forest in South China
- Source :
- PLoS ONE, Vol 9, Iss 5, p e90075 (2014), PLoS ONE
- Publication Year :
- 2014
- Publisher :
- Public Library of Science (PLoS), 2014.
-
Abstract
- The fern Dicranopteris dichotoma is an important pioneer species of the understory in Masson pine (Pinus massoniana) forests growing on acidic soils in the subtropical and tropical China. To improve our understanding of the role of D. dichotoma in nitrogen (N) uptake of these forests, a short-term (15)N experiment was conducted at mountain ridge (MR, with low N level) and mountain foot (MF, with high N level). We injected (15)N tracers as (15)NH4, (15)NO3 or (15)N-glycine into the soil surrounding each plant at both MR and MF sites. Three hours after tracer injection, the fern D. dichotoma took up 15NH4+ significantly faster at MF than at MR, but it showed significantly slower uptake of (15)NO3- at MF than at MR. Consequently, (15)NO3- made greater contribution to the total N uptake (50% to the total N uptake) at MR than at MF, but (15)N-glycine only contributed around 11% at both sites. Twenty-four hours after tracer injection, D. dichotoma preferred (15)NH4+ (63%) at MR, whereas it preferred (15)NO3- (47%) at MF. We concluded that the D. dichotoma responds distinctly in its uptake pattern for three available N species over temporal and spatial scales, but mainly relies on inorganic N species in the subtropical forest. This suggests that the fern employs different strategies to acquire available N which depends on N levels and time.
- Subjects :
- lcsh:Medicine
Plant Science
Forests
Soil Chemistry
Plant Roots
Soil
Soil pH
Tropical and subtropical moist broadleaf forests
lcsh:Science
Multidisciplinary
Ecology
Altitude
Agriculture
Forestry
Understory
Biogeochemistry
Soil Ecology
Chemistry
Plant Physiology
Physical Sciences
Fern
Ecosystem Functioning
Research Article
China
Pinus massoniana
Nitrogen
Glycine
Soil Science
Subtropics
Biology
Ecosystems
Plant-Environment Interactions
Botany
Soil ecology
Environmental Chemistry
Pioneer species
Nitrates
Nitrogen Isotopes
Plant Ecology
Ecology and Environmental Sciences
lcsh:R
Biology and Life Sciences
Restoration Ecology
Biological Transport
biology.organism_classification
Pinus
Geochemistry
Ferns
Earth Sciences
lcsh:Q
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 9
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....7a9f5b4f2a7d05f055d30f4dd229144c