Open Access
Decoupling of soil nutrient cycles as a function of
Manuel Delgado-Baquerizo,Fernando T. Maestre,Antonio Gallardo,Matthew A. Bowker,Matthew D. Wallenstein,José L. Quero,Victoria Ochoa,Beatriz Gozalo,Miguel García-Gómez,Santiago Soliveres,Pablo García-Palacios,Miguel Berdugo,Enrique Valencia,Cristina Escolar,Tulio Arredondo,Claudia Barraza-Zepeda,Donaldo Bran,José A. Carreira,Mohamed Chaieb,Abel A. Conceiça˜o,Mchich Derak,David J. Eldridge,Adrián Escudero,Carlos I. Espinosa,Juan José Gaitán,M. Gabriel Gatica,Susana Gómez-González,Elizabeth Guzman,Julio R. Gutiérrez,Adriana Florentino,E.N. Hepper,Rosa M. Hernández,Elisabeth Huber-Sannwald,Mohammad Jankju,Jushan Liu,Rebecca L. Mau,Maria N. Miriti,Jorge Monerris,Kamal Naseri,Zouhaier Noumi,Vicente Polo,Aníbal Prina,Eduardo Pucheta,Elizabeth Ramírez,David A. Ramırez Collantes,R. L. Romão,Matthew Tighe,Duilio Torres,Cristian Torres-Díaz,Eugene D. Ungar,James Val,Wanyoike Wamiti,Deli Wang,Eli Zaady +53 more
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TLDR
In this paper, the authors evaluate how aridity affects the balance between carbon (C), nitrogen (N) and phosphorus (P) in soils collected from 224 dryland sites from all continents except Antarctica and find a negative effect of aridity on the concentration of soil organic C and total N, but a positive effect on inorganic P.Abstract:
The biogeochemical cycles of carbon (C), nitrogen (N) and phosphorus (P) are interlinked by primary production, respiration and decomposition in terrestrial ecosystems. It has been suggested that the C, N and P cycles could become uncoupled under rapid climate change because of the different degrees of control exerted on the supply of these elements by biological and geochemical processes. Climatic controls on biogeochemical cycles are particularly relevant in arid, semi-arid and dry sub-humid ecosystems (drylands) because their biological activity is mainly driven by water availability. The increase in aridity predicted for the twenty-first century in many drylands worldwide may therefore threaten the balance between these cycles, differentially affecting the availability of essential nutrients. Here we evaluate how aridity affects the balance between C, N and P in soils collected from 224 dryland sites from all continents except Antarctica. We find a negative effect of aridity on the concentration of soil organic C and total N, but a positive effect on the concentration of inorganic P. Aridity is negatively related to plant cover, which may favour the dominance of physical processes such as rock weathering, a major source of P to ecosystems, over biological processes that provide more C and N, such as litter decomposition. Our findings suggest that any predicted increase in aridity with climate change will probably reduce the concentrations of N and C in global drylands, but increase that of P. These changes would uncouple the C, N and P cycles in drylands and could negatively affect the provision of key services provided by these ecosystems.read more
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DissertationDOI
Exploring the possibilities of parsimonious nitrogen modelling in different ecosystems
TL;DR: In this paper, two parsimonious nitrogen models have been developed and implemented in two different data availability scenarios, one in a semi-arid natural forest ecosystem and the other in an anthropogenic agricultural ecosystem.
Dissertation
Modelling of the topsoil organic carbon content by analysing the potential of spectroscopic techniques for digital soil mapping
TL;DR: In this article, the authors explored the capacity of spectroscopy for map soil organic carbon content at regional scale using topsoil samples from Galicia (NW-Spain) and developed a spatially non-stationary approach that allows mapping soil organic content and also identifying the factors more relevant for its accumulation in Europe.
References
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Journal ArticleDOI
Phosphorus transformations along a large‐scale climosequence in arid and semiarid grasslands of northern China
Jiao Feng,Benjamin L. Turner,Xiao-Tao Lü,Zhenhua Chen,Kai Wei,Jihui Tian,Chao Wang,Wentao Luo,Lijun Chen +8 more
TL;DR: In this paper, the Walker and Syers model of phosphorus (P) transformations during long-term soil development has been verified along many chronosequences but has rarely been examined along climosequence, particularly in arid regions.
Journal ArticleDOI
Stoichiometry of carbon, nitrogen, and phosphorus in soil: Effects of agricultural land use and climate at a continental scale
Shengmeng Zheng,Yinhang Xia,Yajun Hu,Xiangbi Chen,Yichao Rui,Anna Gunina,Xunyang He,Tida Ge,Jinshui Wu,Yirong Su,Yakov Kuzyakov +10 more
TL;DR: In this article, the authors examined the soil C:N:P stoichiometry in woodland (as control), agricultural upland and paddy from four climate zones (tropics, subtropics, warm temperate, and mid-temperate) across eastern China.
Journal ArticleDOI
Increasing temperature reduces the coupling between available nitrogen and phosphorus in soils of Chinese grasslands
Yan Geng,Frank Baumann,Chao Song,Mi Zhang,Yue Shi,Peter Kühn,Thomas Scholten,Jin-Sheng He,Jin-Sheng He +8 more
TL;DR: Investigating the spatial pattern and variability of soil N and P availability as well as their coupling relationships at two soil layers along a 4000-km climate transect in two grassland biomes of China, the Inner Mongolian temperate grasslands and the Tibetan alpine grasslands found that in both grasslands the amounts of soil total N, total P and available P all decreased.
Journal ArticleDOI
Soil pH predominantly controls the forms of organic phosphorus in topsoils under natural broadleaved forests along a 2500 km latitudinal gradient
Enqing Hou,Dazhi Wen,Yuanwen Kuang,Jing Cong,Chengrong Chen,Xianjin He,Marijke Heenan,Hui Lu,Yuguang Zhang +8 more
TL;DR: In this article, the variations in the amount and forms of organic P in the top 10 cm of mineral soils in natural broadleaved forests along a latitudinal gradient (18.4-40.8°N) and their environmental drivers were examined.
Journal ArticleDOI
Aridity, Not Fire, Favors Nitrogen‐Fixing Plants Across Tropical Savanna and Forest Biomes
TL;DR: It is concluded that climate plays a greater role than fire in determining the distribution of nitrogen fixers across tropical savanna and forest biomes.