DOI: 10.1007/s10533-015-0150-z
Scopus记录号: 2-s2.0-84958877927
论文题名: Short-term variability in labile soil phosphorus is positively related to soil moisture in a humid tropical forest in Puerto Rico
作者: Wood T.E. ; Matthews D. ; Vandecar K. ; Lawrence D.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 127, 期: 1 起始页码: 35
结束页码: 43
语种: 英语
英文关键词: Bray-1 P
; Diurnal
; La Selva Biological Station
; Luquillo experimental forest
; Phosphorus
; Tropical forest
Scopus关键词: diurnal variation
; forest ecosystem
; humidity
; inorganic phosphorus
; nutrient availability
; pH
; soil moisture
; soil organic matter
; soil respiration
; soil temperature
; solar radiation
; tropical forest
; Costa Rica
; La Selva Biological Station
; Limon
; Luquillo Experimental Forest
; Puerto Rico
英文摘要: Primary productivity in tropical forests is often considered limited by phosphorus (P) availability. Microbial activity is a key regulator of available P through organic matter decomposition (supply) as well as microbial immobilization (depletion). Environmental conditions, such as soil moisture and temperature can fluctuate significantly on hourly to daily time-scales in tropical forested ecosystems. Given the ability of microbes to respond rapidly to changing environmental conditions we would expect concomitant changes in the available soil P pool. Despite the potential for soil P availability to vary on short time-scales, research that investigates hourly to daily changes in the available soil P pool in tropical forests is extremely rare. We quantified diurnal fluctuations in labile soil P and the importance of biotic and abiotic factors in driving these patterns in a wet tropical forest in Puerto Rico. Hourly measurements of Bray-extractable P were made from sunrise to sunset on five separate days along with measurements of soil temperature, moisture, pH, soil respiration, and solar radiation. While we found no significant diurnal variation in labile P, it did, however, vary significantly across the five sample days (2.8–3.8 µg/g). The day-to-day variation in labile P was positively related to soil moisture (R2 = 0.42, p = 0.009). These findings illustrate the potential for rapid change in the available P pool in response to variable soil moisture status as well as the importance of considering soil moisture conditions when estimating P availability in the humid tropics. © 2015, US Government. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83431
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: International Institute of Tropical Forestry, USDA Forest Service, Jardín Botánico Sur, 1201 Calle Ceiba, Río Piedras, PR, Puerto Rico; Fundación Puertorriqueña de Conservación, PO Box 362495, San Juan, PR, Puerto Rico; Department of Environmental Sciences, University of Virginia, P O Box 400123, Charlottesville, VA, United States
Recommended Citation:
Wood T.E.,Matthews D.,Vandecar K.,et al. Short-term variability in labile soil phosphorus is positively related to soil moisture in a humid tropical forest in Puerto Rico[J]. Biogeochemistry,2016-01-01,127(1)