Article
Environmental Sciences
Stephanie Shousha, Roxane Maranger, Jean-Francois Lapierre
Summary: This study investigates the long-term trends in carbon (C), nitrogen (N), and phosphorus (P) exports in a river system in Quebec, Canada. The results show that N exports have increased over time, largely driven by changes in precipitation and net anthropogenic N inputs on land. On the other hand, P exports have tended to decrease, despite higher net anthropogenic P inputs. The study also reveals changes in ecosystem stoichiometry over the years, reflecting the differential elemental exports influenced by natural and anthropogenic drivers.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Multidisciplinary Sciences
T. Zou, X. Zhang, E. A. Davidson
Summary: This study aims to meet the growing food demand and address challenges of phosphorus pollution and depletion of phosphorus reserves by improving phosphorus use efficiency. By examining the historical trajectories of phosphorus budget and phosphorus use efficiency by country and crop type, the study reveals the potential and variations in improving phosphorus use efficiency.
Article
Ecology
Adam F. A. Pellegrini, Tyler Refsland, Colin Averill, Cesar Terrer, A. Carla Staver, Dale G. Brockway, Anthony Caprio, Wayne Clatterbuck, Corli Coetsee, James D. Haywood, Sarah E. Hobbie, William A. Hoffmann, John Kush, Tom Lewis, W. Keith Moser, Steven T. Overby, William A. Patterson, Kabir G. Peay, Peter B. Reich, Casey Ryan, Mary Anne S. Sayer, Bryant C. Scharenbroch, Tania Schoennagel, Gabriel Reuben Smith, Kirsten Stephan, Chris Swanston, Monica G. Turner, J. Morgan Varner, Robert B. Jackson
Summary: This study examines the impacts of changes in fire frequency on tree communities in 29 different sites, revealing that repeated burning generally reduces stem density and basal area. The most pronounced effects are observed in savanna ecosystems and sites with strong wet or dry seasons.
NATURE ECOLOGY & EVOLUTION
(2021)
Article
Environmental Sciences
Zixu Zhang, Ming Hao, Yongqiang Li, Ziqing Shao, Qinghui Yu, Yuan He, Peng Gao, Jingwei Xu, Xingjian Dun
Summary: In this study, the spatial heterogeneity and influencing factors of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP) in surface soil of coastal protected forests in northern China were analyzed. The results showed significant changes in SOC, TN and TP content under different protected forest types and strong spatial dependence. Furthermore, using vegetation and terrain factors as covariates improved the accuracy of soil C-N-P spatial distribution prediction.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Multidisciplinary Sciences
Leon Etienne Parent, Reza Jamaly, Amaya Atucha, Elizabeth Jeanne Parent, Beth Ann Workmaster, Noura Ziadi, Serge-Etienne Parent
Summary: Wisconsin and Quebec are the world's top cranberry-producing regions where fertilizer management is crucial for optimizing yield. The study successfully customized nutrient diagnosis and fertilizer recommendations at a local scale using machine learning methods. The research highlighted the importance of acquiring large experimental datasets to capture the complex interactions affecting cranberry yields at a local level.
Article
Forestry
Xueshu Song, Shaomin Shi, Sen Lu, Rongxiu Ren, Chunxia He, Ping Meng, Jinsong Zhang, Changjun Yin, Xiao Zhang
Summary: The study found that both planting and natural restoration can increase soil organic carbon stocks, but the increase after 16 years is slight. Soil organic carbon concentrations were negatively correlated with soil pH for all four land use patterns, with the correlation strength increasing over time. Plantations may lead to soil acidification, while cropland and naturally restored forests did not show this trend.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Plant Sciences
Huijun Qin, Liang Jiao, Yi Zhou, Jingjing Wu, Xichen Che
Summary: This study investigated the effects of elevation gradients on the C, N, and P content of different tissues of Qinghai spruce, and found that Qinghai spruce is more susceptible to N limitation. The N content and N:P ratio of Qinghai spruce were significantly negatively correlated with temperature, and the P content was lower at high elevation. Soil-climate interactions on the elevation gradient predominantly drove the variation in C, N, and P content and stoichiometry of Qinghai spruce trees in each tissue type. These findings are important for future forest management in coniferous tree growing regions and contribute to understanding the elevational patterns of forest ecosystem stoichiometry in arid and semiarid regions.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Kunlong Hui, Yini Cui, Wenbing Tan
Summary: The study found that nitrogen input can increase the concentration of PAHs in soil and there are significant differences between the low-density fraction and high-density fraction of soil, which has important implications for optimizing and managing agricultural activities in sewage irrigation areas.
ENVIRONMENTAL POLLUTION
(2022)
Article
Soil Science
Christina Steffens, Christian Beer, Stephanie Schelfhout, An De Schrijver, Eva-Maria Pfeiffer, Lars Vesterdal
Summary: Through investigating different tree species in forests, we found that coniferous trees have larger organic carbon and nitrogen stocks in the humus and mineral topsoil compared to other species, while broadleaved species are the opposite. Although forest floor organic carbon and nitrogen stocks increased over the decade, stocks in the mineral soil decreased, indicating short-term changes.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Environmental Sciences
Kate M. Buckeridge, Jennie R. McLaren, Michelle C. Mack, Edward A. G. Schuur, Joshua Schimel
Summary: Retrogressive thaw slumps (RTS) are increasing due to thermal erosion of soil and vegetation after ground ice thaw. The recovery of plant biomass after RTS is crucial for maintaining Arctic carbon stocks. In this study, we investigated the potential sources of nitrogen (N) and phosphorus (P) to support shrub growth in Alaskan RTS. We found that multiple mechanisms may have contributed to mid-successional shrub growth, including sustained N-cycling, N leaching from undisturbed tundra, uninvestigated sources of N-2-fixation, and deep mineral soil N stocks.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Soil Science
Carlos Alberto Tuao Gava, Vanderlise Giongo, Diana Signor, Paulo Ivan Fernandes-Junior
Summary: This study evaluated the impact of land-use change (LUC) on soil organic carbon (SOC), nitrogen (N), and phosphorus (P) distributions in the Brazilian Semi-arid region. Results showed that different land-use systems have significant effects on soil quality and stoichiometric ratios.
SOIL USE AND MANAGEMENT
(2022)
Article
Soil Science
Quanyi Hu, Tianqi Liu, Huina Ding, Chengfang Li, Wenfeng Tan, Ming Yu, Juan Liu, Cougui Cao
Summary: The study investigated the effect of N fertilizer on soil microbial residues and their contribution to SOC and TN. The results showed that N fertilizer increased bacterial residual carbon content and enhanced soil enzyme activities. The contribution of bacterial residual carbon to SOC and TN increased with N fertilizer addition but decreased with decreasing aggregate size.
APPLIED SOIL ECOLOGY
(2023)
Article
Environmental Sciences
Gui-Yang Wang, Yu-Xin Hu, Yong-Xin Liu, Shakeel Ahmad, Xun-Bo Zhou
Summary: The study shows that in a subtropical one-year double cropping maize cultivation, applying 250 kg/ha of nitrogen fertilizer combined with supplementary irrigation can improve soil fertility and annual yield.
Article
Environmental Sciences
Liangyuan Song, Jirui Gong, Zihe Zhang, Weiyuan Zhang, Siqi Zhang, Jiaojiao Dong, Xuede Dong, Yuxia Hu, Yingying Liu
Summary: Ongoing climate change and long-term overgrazing are the main causes of global grassland degradation. Phosphorus (P) is typically a limiting nutrient in degraded grassland soils and its dynamics are important for the responses of carbon (C) feedback to grazing. However, the effects of different grazing levels on multiple phosphorus processes and their impact on soil organic carbon (SOC) are still not well understood.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Soil Science
Chenli Liu, Wenlong Li, Jing Xu, Wei Wei, Pengfei Xue, Hepiao Yan
Summary: In this study, a meta-analysis of 53 peer-reviewed publications was conducted to explore the effects of grazing on soil nutrient levels in alpine grasslands. The results showed that grazing significantly decreased soil organic carbon, total nitrogen, total phosphorus, available phosphorus, soil moisture, and soil C:N ratio, while increasing soil bulk density and temperature. The effects of grazing on soil nutrients varied with grazing intensity, season, livestock type, and grazing duration, providing insights into sustainable management strategies in alpine grassland ecosystems on the Qinghai-Tibet Plateau.
SOIL & TILLAGE RESEARCH
(2021)
Review
Biodiversity Conservation
Pete Smith, Jean-Francois Soussana, Denis Angers, Louis Schipper, Claire Chenu, Daniel P. Rasse, Niels H. Batjes, Fenny van Egmond, Stephen McNeill, Matthias Kuhnert, Cristina Arias-Navarro, Jorgen E. Olesen, Ngonidzashe Chirinda, Dario Fornara, Eva Wollenberg, Jorge Alvaro-Fuentes, Alberto Sanz-Cobena, Katja Klumpp
GLOBAL CHANGE BIOLOGY
(2020)
Article
Environmental Sciences
Joshua L. Ratcliffe, David Campbell, Louis A. Schipper, Aaron M. Wall, Beverley R. Clarkson
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Thomas D. W. Corbett, Hannah Dougherty, Bryan Maxwell, Adam Hartland, William Henderson, Gerald J. Rys, Louis A. Schipper
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Agriculture, Multidisciplinary
Anne R. Wecking, Aaron M. Wall, Liyin L. Liang, Stuart B. Lindsey, Jiafa Luo, David Campbell, Louis A. Schipper
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2020)
Article
Agronomy
A. M. Wall, D. Campbell, P. L. Mudge, L. A. Schipper
AGRICULTURAL AND FOREST METEOROLOGY
(2020)
Article
Agriculture, Multidisciplinary
Michael B. Dodd, Grant Rennie, Miko U. F. Kirschbaum, Donna L. Giltrap, Daniel Smiley, Tony J. van der Weerden
Summary: An integrated catchment management project was established in the late 1990s to study the implications of land use and management change on a typical New Zealand hill country pastoral farm system. Main changes were implemented in 2001-2002, including production forest plantation, indigenous riparian planting, intensification of livestock enterprises, and spaced-tree planting on a 296 ha Mangaotama block.
The study aimed to estimate the greenhouse gas (GHG) balance for the catchment farm by incorporating recent measurement and modeling over a 100-year period (excluding soil carbon). The changes reduced the GHG intensity of the livestock enterprises and turned the system from a net emission source into a long-term net sink, mainly due to planting of Pinus radiata with high carbon assimilation rates. Based on mean tree carbon stocks over 100 years, it was estimated that 36% of the catchment farm would need pine forestry to achieve net zero emissions.
NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH
(2021)
Article
Biodiversity Conservation
Kate H. Orwin, Norman W. H. Mason, Lee Aalders, Nigel L. Bell, Nicole Schon, Paul L. Mudge
Summary: Manipulating plant traits can alter soil functions, but the impacts may vary with nitrogen fertilizer inputs. Relationships among plant traits, soil biota, and soil functions were generally consistent across different nitrogen fertilizer rates, but there were some changes observed in specific relationships with higher nitrogen inputs. Further research is needed to better understand the interactions between plant traits, species-specific effects, and management practices in determining soil functions.
JOURNAL OF APPLIED ECOLOGY
(2021)
Article
Multidisciplinary Sciences
Katharyn A. Duffy, Christopher R. Schwalm, Vickery L. Arcus, George W. Koch, Liyin L. Liang, Louis A. Schipper
Summary: The temperature dependence of global photosynthesis and respiration influences the strength of land carbon sink, with the average temperature of the warmest quarter exceeding the thermal maximum for photosynthesis over the past decade, leading to a potential halving of land sink strength in the future.
Article
Agronomy
J. P. Goodrich, A. M. Wall, D. Campbell, D. Fletcher, A. R. Wecking, L. A. Schipper
Summary: This study introduces a new approach for evaluating emissions mitigation options by partitioning data by source footprint contribution. Machine learning algorithms are used in conjunction with eddy covariance measurements to estimate annual uncertainties for N2O emissions in temperate grazed grasslands.
AGRICULTURAL AND FOREST METEOROLOGY
(2021)
Article
Entomology
Philippa Gerard, Derrick Wilson, Martin Upsdell
Summary: Two species from the genus Microctonus Wesmael have been introduced into New Zealand as biocontrol agents for pest weevils in pasture. Population studies showed that M. aethiopoides recovers from near extinction each spring, while M. hyperodae experiences declines in populations and parasitism levels during late summer and early autumn due to low host availability. The contrasting patterns between the two species are influenced by endophyte-conferred pest-resistant grass in the pastures and a warming climate.
Article
Environmental Sciences
Shane W. Stoner, Alison M. Hoyt, Susan Trumbore, Carlos A. Sierra, Marion Schrumpf, Sebastian Doetterl, W. Troy Baisden, Louis A. Schipper
Summary: The study found that long-term phosphorus fertilizer and irrigation treatments can increase carbon storage in grasslands, with increased decomposition rates in fast cycling carbon to offset input increases. Increasing phosphorus fertilization also led to increased decomposition rates in the slow pool.
Article
Soil Science
Paul L. Mudge, Jamie Millar, Jack Pronger, Alesha Roulston, Veronica Penny, Scott Fraser, Andre Eger, Thomas Caspari, Balin Robertson, Norman W. H. Mason, Louis A. Schipper
Summary: The study found that irrigation in New Zealand significantly reduced soil carbon and nitrogen stocks, with greater losses observed at greater durations of irrigation and lower aridity levels. The impact of irrigation on soil C and N was negatively related to aridity, with increasingly significant carbon losses observed at sites with higher precipitation levels. The results suggest that a new equilibrium may be reached with lower carbon stocks in irrigated grasslands compared to unirrigated grasslands.
Article
Biodiversity Conservation
Gabriel Y. K. Moinet, Manpreet K. Dhami, John E. Hunt, Anastasija Podolyan, Liyin L. Liang, Louis A. Schipper, David Whitehead, Jonathan Nunez, Adriano Nascente, Peter Millard
Summary: The study found that soil microbial communities adapt to long-term warming, but substrate quality and quantity exert a stronger influence on selecting for distinct thermal traits than temperature.
GLOBAL CHANGE BIOLOGY
(2021)
Review
Agriculture, Multidisciplinary
Christopher E. Buddenhagen, Graeme Bourdot, Mike Cripps, Nigel Bell, Paul Champion, Mike Dodd, Han Eerens, Hossein Ghanizadeh, Andrew Griffiths, Kerry Harrington, Peter Heenan, Philip E. Hulme, Trevor James, John Kean, Shona Lamoureaux, Joe Neal, Zachary Ngow, Irena Obadovic, Sofia Orre-Gordon, Helen Percy, Phil Rolston, Katherine Tozer, Ben Wynne-Jones, Sue Zydenbos
Summary: Pastures play a significant role in global agriculture, but weed-related productivity losses are a major concern. Addressing issues such as reduced access to herbicides, rethinking weed management, and minimizing environmental impacts are crucial for sustainable pasture management. Interdisciplinary research is needed to tackle biosecurity and weed management challenges while maintaining productivity.
NEW ZEALAND JOURNAL OF AGRICULTURAL RESEARCH
(2023)
Article
Biodiversity Conservation
Liyin L. Liang, Miko U. F. Kirschbaum, Vickery L. Arcus, Louis A. Schipper
Summary: Climate warming can reduce global soil carbon stocks by enhancing microbial decomposition. Previous research suggested a negative relationship between carbon quality and temperature sensitivity, implying that recalcitrant carbon is more sensitive to temperature. However, new research indicates that this relationship may be an invalid artifact caused by the arbitrary choice of reference temperature. By using the uncatalysed reaction rate as the carbon quality index, it was found that there is no relationship between carbon quality and temperature sensitivity in enzyme-catalysed reactions. This suggests that the temperature sensitivity of microbial decomposition of soil carbon is similar regardless of its quality, alleviating concerns about the acceleration of warming-induced decomposition of recalcitrant carbon.
GLOBAL CHANGE BIOLOGY
(2022)
