Article
Environmental Sciences
Norbert Kamjunke, Holger Brix, Gotz Floeser, Ingeborg Bussmann, Claudia Schuetze, Eric P. Achterberg, Uta Koedel, Philipp Fischer, Louise Rewrie, Tina Sanders, Dietrich Borchardt, Markus Weitere
Summary: The nutrient and carbon dynamics within river-estuary-coastal water systems were analyzed to understand the flux of matter from the terrestrial environment to the ocean. The study revealed that the distribution and variations of nutrients and carbon varied significantly in different water environments, influenced by the travel time of water and nutrient fluxes, thereby affecting the functionality and stability of the aquatic ecosystems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Dong-Wei Yu, Su-Juan Duan, Xiao-Chao Zhang, Da-Qiu Yin, Shi-Jun Wang, Jin-Song Chen, Ning-Fei Lei
Summary: Different nutrient supply has significant effects on leaf stoichiometry and relative growth rate of alien plants, with N:P ratio positively correlated with relative growth rate, but influenced by species and nutrient supply.
Article
Ecology
Matthias Pucher, Peter Floedl, Daniel Graeber, Klaus Felsenstein, Thomas Hein, Gabriele Weigelhofer
Summary: The study found that the uptake velocity of different sources of DOM in streams varies, showing a trend of corn > pig dung > leaves > nettles > cow dung. While the uptake rates of individual DOM components mostly resemble the bulk DOC uptake, there are also exceptions. Additionally, DOM components with higher concentrations tend to have lower uptake efficiencies.
Article
Agricultural Engineering
Muhammad Mubashar, Zulfiqar Ahmad, Cheng Li, Haiyang Zhang, Cong Xu, Gaohong Wang, Dongru Qiu, Lirong Song, Xuezhi Zhang
Summary: Mixotrophic microalgae have great potential for nutrient removal in wastewater, particularly when autotrophy and heterotrophy coexist. The study found that the N removal rate significantly increased in mixotrophic conditions compared to autotrophic and heterotrophic controls. Achieving a balanced ratio of autotrophy/heterotrophy can lead to high N removal rates and negative carbon budgets, making it a sustainable approach for wastewater treatment.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agronomy
Haoran Gui, Jiali Wang, Mengjun Hu, Zhenxing Zhou, Shiqiang Wan
Summary: The effects of fire on soil respiration (SR) and heterotrophic respiration (HR) depend on fire severity and type. High and low severity fires reduce SR and HR, while moderate severity fires have negligible effects. Wildfires significantly decrease SR and HR, while prescribed fire decreases SR but does not affect HR. The responses also vary with ecosystem types. Additionally, the changes in soil organic C, dissolved C, microbial biomass C, and belowground biomass are the main drivers of the effects of fire on SR and HR.
AGRICULTURAL AND FOREST METEOROLOGY
(2023)
Article
Environmental Sciences
Tjorven Hinzke, Franziska Tanneberger, Camiel Aggenbach, Sven Dahlke, Klaus-Holger Knorr, Wiktor Kotowski, Lukasz Kozub, Jelena Lange, Guixiang Li, Eugeniusz Pronin, Elke Seeber, Wendelin Wichtmann, Juergen Kreyling
Summary: This study focused on nutrient uptake capacities of Carex species in fens, finding that Carex biomass harvest can effectively remove a portion of nitrogen load in high-nutrient environments. Productive Carex species had higher nutrient standing stocks across varying nutrient levels, indicating their potential in nutrient removal.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geosciences, Multidisciplinary
Tanu Kumari, Rishikesh Singh, Pramit Verma, Akhilesh Singh Raghubanshi
Summary: Soil respiration is influenced by a variety of factors including vegetation density, monsoon phases, and microbial and root biomass. Heterotrophic respiration is the major contributor to soil respiration in medium to high-density vegetation, while autotrophic respiration dominates in low-density vegetation during certain monsoon phases. The partitioning of root biomass plays a crucial role in regulating the components of soil respiration.
Article
Agronomy
Xiaowen Song, Qian Chen, Kexin Wang, Xianjin Zhu, Tao Zhang, Bei Sun, Guojiao Wang, Hong Yin, Xiaoxue Wang, Shaojie Guo
Summary: In paddy field ecosystems, ecosystem respiration (ER) and its components show nonlinear responses to gradient warming. The nonlinear response of autotrophic respiration (AR) is related to total plant biomass (TB), while the nonlinear response of heterotrophic respiration (HR) is associated with soil microbial biomass carbon (MBC). Warming enhances the AR/ER ratios nonlinearly and reduces the HR/ER ratios. Therefore, the nonlinear response patterns of ER and its components should be considered in global carbon cycling models.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Ecology
Priscilla Le Mezo, Jerome Guiet, Kim Scherrer, Daniele Bianchi, Eric Galbraith
Summary: This study quantifies the cycling of nitrogen, phosphorus, and iron in the global ocean by commercially targeted marine fish, and assesses the impact of fishing activity on this cycling.
Article
Agriculture, Multidisciplinary
Guanghui Ming, Quan Zhang, Wei Gong, Baoqing Wang, Hongchang Hu, Fuqiang Tian
Summary: This study evaluated the impact of film mulched and drip-irrigation (FMDI) on ecosystem respiration (Re) and its autotrophic (Raa) and heterotrophic (Rh) components in a cotton field. The results showed that under FMDI, Rh was the dominant component of Re compared to Raa. These findings contribute to a better understanding of how FMDI affects regional carbon balance.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2023)
Article
Soil Science
Hongwei Xu, Minggang Wang, Chengming You, Bo Tan, Lin Xu, Han Li, Li Zhang, Lixia Wang, Sining Liu, Guirong Hou, Yang Liu, Zhenfeng Xu, Jordi Sardans, Josep Penuelas
Summary: This study conducted a global meta-analysis of 603 pairwise observations to investigate the effects of warming on C:N:P stoichiometry in plant-soil-microorganism systems. The results showed that warming increased soil N:P and vector angle, but decreased plant shoot N:P and enzyme N:P. These effects were influenced by warming duration, magnitudes, ecosystem type, and soil depths, and the findings contribute to a better understanding of C, N, and P cycling processes in terrestrial ecosystems.
SOIL & TILLAGE RESEARCH
(2024)
Article
Geosciences, Multidisciplinary
Guancheng Liu, Hao Wang, Guoyong Yan, Miao Wang, Shuai Jiang, Xiaochun Wang, Junsen Xue, Min Xu, Yajuan Xing, Qinggui Wang
Summary: Extracellular enzymes are crucial for organic matter decomposition and their activity reflects microbial nutrient demand. Secondary succession in ecosystems leads to changes in soil properties and microbial community structure, affecting nutrient cycling and ecosystem stability. This study aims to investigate the changes in soil enzymes during the succession in boreal forest ecosystems.
Article
Environmental Sciences
Rudong Zhao, Mei He, Feng Liu
Summary: Soil respiration components (Rh and Ra) respond differently to long-term forest conversion, with Rh and Ra patterns primarily driven by soil microbial community (SMC) structures and microenvironmental factors. Plant community attributes and forest management play important roles in soil C emission into the atmosphere during forest conversion.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Engineering, Environmental
Yindong Tong, Xuejun Wang, James J. Elser
Summary: Eutrophication is a widespread water quality issue worldwide. Efforts to control eutrophication have often focused on reducing external nutrient inputs, while neglecting the importance of nutrient stoichiometry and changes in plankton composition.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Ana P. Abreu, Rui C. Morais, Jose A. Teixeira, Joao Nunes
Summary: This article introduces the potential applications of microalgae as a sustainable feedstock in various areas such as food, drugs, and environmental remediation. The current limitations in large-scale microalgae production, such as low photosynthetic efficiency and expensive CO2 management, are discussed. Supplementing microalgae cultivation with organic carbon substrates can significantly increase biomass productivity, making it a viable strategy.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Limnology
James M. Hood, Lyndsie M. Collis, John D. Schade, Rebecca A. Stark, Jacques C. Finlay
Summary: This study investigated benthic POM-associated respiration and nutrient uptake in six streams in the forested South Fork Eel River watershed. The results showed that downstream sites had benthic POM composed of smaller particles with lower organic matter content and richer in nitrogen and autotrophic material. Areal respiration and nutrient uptake rates increased with stream size, while microbial biomass determined longitudinal patterns in benthic POM-associated areal nutrient uptake and respiration rates.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Biodiversity Conservation
James S. Sinclair, Michael E. Fraker, James M. Hood, Kenneth T. Frank, Mark R. DuFour, Ann Marie Gorman, Stuart A. Ludsin
Summary: This study evaluated the changes in fish species and trait composition in Lake Erie over the past 50 years in relation to human-driven changes in nutrient inputs, climate warming, and biological invasions. The results showed that shifts in species and traits were primarily associated with altered nutrient inputs, with no consistent trait-based evidence for the effects of warming and invasive species. Furthermore, context-dependent trait responses were observed, with different nutrient inputs leading to different trait shifts in different regions of the lake.
GLOBAL CHANGE BIOLOGY
(2021)
Article
Limnology
Noah P. Germolus, Patrick L. Brezonik, Raymond M. Hozalski, Jacques C. Finlay
Summary: Long-term trends in color (CDOM) in the Mississippi Headwaters reach are related to seasonally dominant changes in climatic conditions, with no monotonic trends in daily or mean annual color but trends in seasonal metrics on decadal scales.
LIMNOLOGY AND OCEANOGRAPHY
(2021)
Article
Environmental Sciences
Cassandra J. May, Richard R. Budnik, Stuart A. Ludsin, Daniel R. O'Donnell, James M. Hood, Edward F. Roseman, Elizabeth A. Marschall
Summary: The study found that copepod biomass during the larval period has a significant impact on walleye recruitment in Lake Erie, while the biomass of cladocerans and spring water temperatures are not accurate predictors.
JOURNAL OF GREAT LAKES RESEARCH
(2021)
Article
Ecology
Kaleb K. Heinrich, Colden Baxter, Alex T. C. Bell, James M. Hood
Summary: The interaction between the invasive species common carp and Russian olive in the western USA has led to synergistic effects on food webs and ecosystem processes. The dense stand of Russian olive trees has increased nitrogen inputs and organic matter in the ecosystem, contributing to the increase in carp density. The consumption of olives by carp has resulted in increased nitrogen excretion, potentially amplifying nutrient recycling and export in invaded streams.
Article
Geosciences, Multidisciplinary
Zhen Wu, Jincheng Li, Yanxin Sun, Josep Penuelas, Jilin Huang, Jordi Sardans, Qingsong Jiang, Jacques C. Finlay, Gregory L. Britten, Michael J. Follows, Wei Gao, Boqiang Qin, Jinren Ni, Shouliang Huo, Yong Liu
Summary: Analyzing over 5000 lakes globally, researchers have found that lakes preferentially retain phosphorous over nitrogen, exacerbating the imbalance of nutrient cycles caused by human activities. The greater retention of phosphorous leads to an elevation in the nitrogen to phosphorous ratio in lake outflows, further worsening the global ecosystem's nitrogen-phosphorous imbalance.
Article
Environmental Sciences
Michael E. Fraker, James S. Sinclair, Kenneth T. Frank, James M. Hood, Stuart A. Ludsin
Summary: Understanding the relationships between environmental drivers and responses is essential for effective ecosystem-based management. This study analyzed long-term data from Lake Erie to explore how the timescale of analysis and data richness influence the identification of driver-response relationships within a large, dynamic ecosystem. The results highlighted the importance of considering the temporal perspective of analysis and the chosen indicators when identifying predictive drivers of ecosystem trends.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Benjamin D. Janke, Jacques C. Finlay, Vinicius J. Taguchi, John S. Gulliver
Summary: Managed stormwater ponds play a vital role in mitigating urban runoff and nutrient pollution, but their functions are often overlooked. This study shows that water quality improvements in these ponds are mainly achieved through the settling of nutrients and contaminants. The study also highlights the importance of understanding and improving pond hydrologic function for enhancing nutrient retention and meeting water quality goals.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Wilfred M. Wollheim, Tamara K. Harms, Andrew L. Robison, Lauren E. Koenig, Ashley M. Helton, Chao Song, William B. Bowden, Jacques C. Finlay
Summary: River networks play an important role in biogeochemical processes of the earth system. Here the authors show that cumulative river network function increases faster than watershed size for many biogeochemical processes, particularly at higher river flow, indicating large rivers contribute disproportionately to network function in the Earth System.
NATURE COMMUNICATIONS
(2022)
Article
Limnology
Wyatt F. Cross, James M. Hood, Jonathan P. Benstead, Alexander D. Huryn, Jill R. Welter, Gisli M. Gislason, Jon S. Olafsson
Summary: Climate warming and eutrophication are important factors affecting the role of freshwater in the global carbon cycle. This study found that nutrient enrichment and temperature have significant effects on ecosystem production, with warmer N-enriched streams experiencing amplified effects. Increased respiration of microbial heterotrophs was identified as the driver of these responses.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2022)
Article
Engineering, Environmental
Whitney M. King, Susan E. Curless, James M. Hood
Summary: Cyanobacterial harmful blooms are increasing worldwide due to excessive phosphorus losses from agricultural watersheds. River phosphorus cycling plays a key role in reducing phosphorus exports and constraining cyanobacteria blooms during high flow events. However, without considering river phosphorus cycling, phosphorus exports may increase, leading to intensified blooms.
Article
Environmental Sciences
Meredith A. Holgerson, David C. Richardson, Joseph Roith, Lauren E. Bortolotti, Kerri Finlay, Daniel J. Hornbach, Kshitij Gurung, Andrew Ness, Mikkel R. Andersen, Sheel Bansal, Jacques C. Finlay, Jacob A. Cianci-Gaskill, Shannon Hahn, Benjamin D. Janke, Cory McDonald, Jorrit P. Mesman, Rebecca L. North, Cassandra O. Roberts, Jon N. Sweetman, Jackie R. Webb
Summary: The study reveals that the mixing regimes of shallow waterbodies are highly sensitive to small differences in size and depth. Shallow lakes tend to mix more frequently, while shallow ponds mix less often. Precipitation events weaken stratification and can cause short-term mixing.
WATER RESOURCES RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Shannon Pace, James M. Hood, Heather Raymond, Brigitte Moneymaker, Steve W. Lyon
Summary: New technologies enable real-time monitoring of nutrients in water systems, providing valuable insights for water management and achieving water quality goals.
Article
Multidisciplinary Sciences
Christian A. Vossler, Christine L. Dolph, Jacques C. Finlay, David A. Keiser, Catherine L. Kling, Daniel J. Phaneuf
Summary: This study addresses the lack of scientific knowledge on quantifying the benefits of landscape-wide water quality improvements in the United States. By incorporating the Biological Condition Gradient (BCG) as a water quality metric in a stated preference survey, the study estimates the economic value for aquatic ecosystem improvements. The study finds that people are willing to pay more for policies that target their home watershed and nonuse sources of value are important for overall benefits.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Environmental Sciences
Rebecca M. Kreiling, Patrik M. Perner, Kenna J. Breckner, Tanja N. Williamson, Lynn A. Bartsch, James M. Hood, Nathan F. Manning, Laura T. Johnson
Summary: Reducing phosphorus (P) concentrations in aquatic ecosystems is crucial for improving water quality and preventing harmful algal blooms. This study focused on the Maumee River network, a major source of P loads to Lake Erie, to understand the role of rivers in P transport. The researchers found that stream sediment acted as a P sink at most sites, but could become a P source if stream water SRP concentrations decrease. Factors such as agricultural land use and stream size influenced the concentrations of SRP and sediment P saturation, which in turn affected the spatial variation in the zero equilibrium P concentration (EPC0).
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)