DOI: 10.1007/s10533-014-0031-x
Scopus记录号: 2-s2.0-84918513392
论文题名: Rocks create nitrogen hotspots and N:P heterogeneity by funnelling rain
作者: Göransson H. ; Edwards P.J. ; Perreijn K. ; Smittenberg R.H. ; Olde Venterink H.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 121, 期: 2 起始页码: 329
结束页码: 338
语种: 英语
英文关键词: Atmospheric deposition
; N:P stoichiometry
; Nitrogen
; Phosphorus
; Rain funnel
; Resource heterogeneity
Scopus关键词: Rumex scutatus
英文摘要: We postulated that soil nutrient heterogeneity arises not only through physical and biological processes in the soil, but also through emergent rocks diverting precipitation containing nutrients to the surrounding soil. To test this idea—which we call the ‘funnelling effect’ of such rocks—we placed ion-exchange resin in small boxes beside rocks and in open soil on a pristine glacial forefield site in Switzerland, and measured the amounts of NH4 +, NO3 −, NO2 − and PO4 3− that were adsorbed. We also placed resin bags beneath PVC funnels of different sizes so that we could calibrate the natural funnelling effect of rocks. We obtained strong linear relationships between nitrogen (N) adsorbed and rain-collecting area of both rocks and funnels. Although the mean rain-collecting area of rocks was only 0.02 m2, mean N adsorption was around 10 times higher within 1 cm of rocks than further away. In contrast, phosphorus (P) was not concentrated beside rocks, so that N:P stoichiometry varied spatially. Rumex scutatus and Agrostisgigantea plants that rooted beside rocks had significantly higher foliar N concentrations than those growing further away, in line with the resin data. However, the two species showed differing responses in foliar P and N:P. We propose that R. scutatus benefits from the increased N supply by increasing its uptake of soil P, while A. gigantea is unable to do so. This study clearly demonstrates that aboveground rain-funnelling structures can produce spatial heterogeneity in N supply, thereby creating a diversity of nutritional niches for plants. © 2014, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83597
Appears in Collections: 气候减缓与适应 气候变化事实与影响
There are no files associated with this item.
作者单位: Institute of Integrative Biology, ETH Zurich, Universitätstrasse 16, Zurich, Switzerland; Geological Institute, ETH Zurich, Sonneggstrasse 5, Zurich, Switzerland; Institute of Forest Ecology, University of Natural Resources and Life Sciences (BOKU), Peter-Jordanstrasse 82, Vienna, Austria; Department of Geological Sciences, Stockholm University, Stockholm, Sweden; Plant Biology and Nature Management, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
Recommended Citation:
Göransson H.,Edwards P.J.,Perreijn K.,et al. Rocks create nitrogen hotspots and N:P heterogeneity by funnelling rain[J]. Biogeochemistry,2014-01-01,121(2)