气候变化领域集成服务门户(CCPortal): The pedogenic Walker and Syers model under high atmospheric P deposition rates

CCPortal

DOI	10.1007/s10533-020-00657-8
	The pedogenic Walker and Syers model under high atmospheric P deposition rates
	Gallardo A.; Fernández-Palacios J.M.; Bermúdez A.; de Nascimento L.; Durán J.; García-Velázquez L.; Méndez J.; Rodríguez A.
发表日期	2020
ISSN	0168-2563
起始页码	237
结束页码	253
卷号	148 期号:3
英文摘要	The Walker and Syers model predict that phosphorus (P) availability decreases with time leading to a final stage known as retrogression. We tested the validity of the Walker and Syers model in the Canary Islands, a soil chronosequence ranging from 300 years to 11 million years under recurrent episodes of atmospheric dust-containing P inputs. In particular, we compared our results with those from the volcanic soil chronosequences described in the Hawaii Islands and in Arizona, as they share key biological and/or geological characteristics. In three islands of the Canarian Archipelago, we selected 18 independent sites dominated by mature Pinus canariensis forests and grouped them into six age classes. For each site, soil samples were analyzed for known proxies of soil nitrogen (N), P and cations availability. We also analyzed the P. canariensis needles for N, P and cation contents. We found tendencies similar to those observed in other soil chronosequences: maximum N and P concentrations at intermediate ages and lower P concentrations in the older soils. The nutrient dynamics suggested that the older sites may indeed be approaching the retrogression stage but at lower rates than in other similar chronosequences. Differences from other chronosequences are likely due to the drier Canarian climate, the higher P deposition rates originating from the nearby Sahara Desert and the top soil horizon studied. Our results confirm the validity of the Walker and Syers model for the Canary Islands despite the influence that the high P deposition rates and the seasonally dry climate may have on soil development and P pools in P. canariensis ecosystems. © 2020, The Author(s).
英文关键词	Canary Islands; Leaf nutrients; Nitrogen availability; Pedogenesis; Phosphorus availability; Phosphorus fractionation; Saharan dust; Soil nutrients
语种	英语
scopus关键词	atmospheric deposition; chronosequence; concentration (composition); dust; nutrient availability; nutrient dynamics; phosphorus; retrogression; soil horizon; soil nitrogen; volcanic soil; Arizona; Canary Islands; Hawaiian Islands; Sahara; Spain; United States; Pinus canariensis
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153156
作者单位	Department of Physics, Chemical and Natural Systems, Universidad Pablo de Olavide, Seville, 41013, Spain; Island Ecology and Biogeography Group, Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias (IUETSPC), University of La Laguna, La Laguna, La Laguna (Tenerife), Spain; Centro de Ecologia Funcional, CEF, Departamento de Ciências da Vida, Universidade de Coimbra, Calçada Martim de Freitas, Coimbra, Portugal; Departamento de Biología y Geología, Física y Química Inorgánica, Universidad Rey Juan Carlos, Móstoles, 28933, Spain
推荐引用方式 GB/T 7714	Gallardo A.,Fernández-Palacios J.M.,Bermúdez A.,et al. The pedogenic Walker and Syers model under high atmospheric P deposition rates[J],2020,148(3).
APA	Gallardo A..,Fernández-Palacios J.M..,Bermúdez A..,de Nascimento L..,Durán J..,...&Rodríguez A..(2020).The pedogenic Walker and Syers model under high atmospheric P deposition rates.Biogeochemistry,148(3).
MLA	Gallardo A.,et al."The pedogenic Walker and Syers model under high atmospheric P deposition rates".Biogeochemistry 148.3(2020).