DOI: 10.1007/s10533-017-0392-z
Scopus记录号: 2-s2.0-85032005409
论文题名: Nutrient addition affects net and gross mineralization of phosphorus in the organic layer of a tropical montane forest
作者: Dietrich K. ; Spohn M. ; Villamagua M. ; Oelmann Y.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 136, 期: 2 起始页码: 223
结束页码: 236
语种: 英语
英文关键词: Environmental change
; Nutrient cycling
; Organic phosphorus mineralization
; Phosphorus availability
; Tropical montane forest
Scopus关键词: decomposition
; dilution
; environmental change
; immobilization
; microbial activity
; mineralization
; montane forest
; nutrient cycling
; nutrient dynamics
; nutrient limitation
; organic matter
; organic phosphorus
; soil-vegetation interaction
; transformation
; tropical forest
; Ecuador
英文摘要: In tropical ecosystems with highly weathered soils, transformation of organic phosphorus (P) to bioavailable inorganic P plays a crucial role for the nutrition of organisms. In these ecosystems, P is suspected to be growth-limiting and might therefore be affected by atmospheric nutrient deposition occurring even in remote areas such as montane rainforests. We assessed effects of P and nitrogen (N) addition on net and gross P mineralization rates, and microbial P immobilization in the organic layer along an altitudinal gradient of a tropical montane rainforest in Ecuador. Net P mineralization rates amounted to 1.8 ± 0.9 (at 1000 m a.s.l.), 3.7 ± 0.6 (at 2000 m) and 2.0 ± 0.4 (at 3000 m) mg P kg−1 day−1. Altitudinal differences led to an increased microbial P immobilization at 1000 m compensating for a higher gross P mineralization. P addition increased net P mineralization rates at 2000 and 3000 m, suggesting a higher P demand at 1000 m. At higher altitudes, P likely was released as a by-product during organic matter decomposition. Gross P mineralization, determined by means of the isotopic dilution approach, could not be calculated for control and N treatments due to rapid microbial P immobilization. For P (+N) treatments, gross P mineralization rates were lowest at the 1000 m site towards the end of the long-term incubation period. Atmospheric P deposition in the tropics might lead to P fertilization effects through direct input as well as through acceleration of P release from organic matter, thereby increasing P availability for organisms. © 2017, Springer International Publishing AG. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83218
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Geoecology, University of Tübingen, Rümelinstrasse 19-23, Tübingen, Germany; Soil Biogeochemistry, Bayreuth Center of Ecology and Environmental Research (BAYCEER), University of Bayreuth, Dr.-Hans-Frisch-Strasse 1-3, Bayreuth, Germany; Ingeniería Agrícola, Universidad Nacional de Loja, Av. Pío Jaramillo Alvarado y Reinaldo Espinosa, La Argelia, Ecuador
Recommended Citation:
Dietrich K.,Spohn M.,Villamagua M.,et al. Nutrient addition affects net and gross mineralization of phosphorus in the organic layer of a tropical montane forest[J]. Biogeochemistry,2017-01-01,136(2)