Viewing river corridors through the lens of critical zone science DOI Creative Commons
Adam S. Wymore, Adam S. Ward, Ellen Wohl

et al.

Frontiers in Water, Journal Year: 2023, Volume and Issue: 5

Published: May 31, 2023

River corridors integrate the active channels, geomorphic floodplain and riparian areas, hyporheic zone while receiving inputs from uplands groundwater exchanging mass energy with atmosphere. Here, we trace development of contemporary understanding river perspectives geomorphology, hydrology, ecology, biogeochemistry. We then summarize models corridor along multiple axes including dimensions space time, disturbance regimes, connectivity, hydrochemical exchange flows, legacy effects humans. explore how science can be advanced a critical framework by moving beyond primary focus on discharge-based controls toward multi-factor that identify dominant processes thresholds make predictions serve society. opportunities to investigate relationships between large-scale spatial gradients local-scale processes, embrace riverine are temporally variable interacting, acknowledge services do not respect disciplinary boundaries increasingly need integrated multidisciplinary investigations, explicitly humans their management actions as part corridor. intend our review stimulate cross-disciplinary research recognizing occupy unique position Earth's surface.

Language: Английский

Two key features influencing community assembly processes at regional scale: Initial state and degree of change in environmental conditions DOI Creative Commons
Youzhi Feng, Ruirui Chen, James Stegen

et al.

Molecular Ecology, Journal Year: 2018, Volume and Issue: 27(24), P. 5238 - 5251

Published: Oct. 28, 2018

Abstract Belowground microbial communities strongly influence ecosystem function such that predicting may rely on understanding ecological processes assemble communities. Uncertainty remains, however, in what governs the relative contributions of different processes. To help fill this knowledge gap, we test general hypothesis both initial state and degree change environmental conditions govern assembly do so, leveraged regional‐scale nutrient organic matter addition experiments used soil (SOM) as a proxy integrated conditions. Consistent with our hypothesis, found amount SOM SOM—in response to addition—influenced These influences were most clearly observed at regional scale, suggesting potential scale dependence. More specifically, additions homogenized bacterial community composition due enhanced homogenizing dispersal when content was initially high. In contrast, led divergence variable selection low and/or increased significantly additions. Our findings indicate important connections among conditions, variables conceptual inferences highlight need strengthen between theory biogeochemical modelling.

Language: Английский

Citations

193
Energy use efficiency of soil microorganisms: Driven by carbon recycling and reduction DOI Creative Commons
Chaoqun Wang, Yakov Kuzyakov

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(22), P. 6170 - 6187

Published: Aug. 30, 2023

Abstract Carbon use efficiency (CUE) is being intensively applied to quantify carbon (C) cycling processes from microbial cell global scales. Energy (EUE) at least as important the CUE because (i) microorganisms organic C mainly an energy source and not elemental per se, (ii) growth maintenance are limited by energy, but a structural element. We conceptualize review importance of EUE soil focus on content in compounds depending nominal oxidation state (NOSC), approaches assess EUE, (iii) similarities differences between (iv) discuss mechanisms responsible for lower compared CUE. The atom (enthalpy combustion, total stored compound) very closely (R 2 = 0.98) positively related NOSC increases 108 kJ mol −1 one unit. For first time we assessed biomass (−0.52) calculated corresponding −510 C. linked considering element compositions substrates utilized microorganisms. mean (0.32–0.35) 18% than (0.41) using glucose substrate. This definitely indicates that relative Based comparison broad range utilization maintenance, well database experimental various compounds, clearly explained five main factors why two behind versus are: recycling: can be microbially recycled, whereas always only once, chemical reduction inorganic compounds: used reduction, which ongoing without utilization.

Language: Английский

Citations

52
Changes of Soil Dissolved Organic Matter and Its Relationship with Microbial Community along the Hailuogou Glacier Forefield Chronosequence DOI
Shiyang Yu,

Jitao Lv,

Lu Jiang

et al.

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(9), P. 4027 - 4038

Published: Feb. 22, 2023

Glacier-retreated areas are ideal to study soil biogeochemical processes during vegetation succession, because of the limited effect other environmental and climatic factors. In this study, changes dissolved organic matter (DOM) its relationship with microbial communities along Hailuogou Glacier forefield chronosequence were investigated. Both diversity DOM molecular chemodiversity recovered rapidly at initial stage, indicating pioneering role microorganisms in formation development. The chemical stability enhanced succession due retaining compounds high oxidation state aromaticity. composition affected communities, while tended utilize labile components form refractory components. This complex network between played an important development as well stable carbon pool glacier-retreated areas.

Language: Английский

Citations

45
Thermal responses of dissolved organic matter under global change DOI Creative Commons
Ang Hu, Kyoung‐Soon Jang, Andrew J. Tanentzap

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Jan. 17, 2024

The diversity of intrinsic traits different organic matter molecules makes it challenging to predict how they, and therefore the global carbon cycle, will respond climate change. Here we develop an indicator compositional-level environmental response for dissolved quantify aggregated individual that positively negatively associate with warming. We apply assess thermal sediment in 480 aquatic microcosms along nutrient gradients on three Eurasian mountainsides. Organic consistently temperature change within across contrasting zones. At a compositional level, warmer sites has stronger shows functional reorganization towards lower thermodynamic favorability microbial decomposition. is more sensitive warming at higher nutrients, increased sensitivity up 22% each additional 1 mg L

Language: Английский

Citations

18
Marine Recalcitrant Dissolved Organic Matter Gained by Processing at Sandy Subterranean Estuaries DOI
Peng Zhang, Yinghui Wang, Biwei Yang

et al.

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 13, 2025

The sandy subterranean estuary (STE) connecting fresh groundwater to saline sea water is characterized by strong geochemical (salinity, redox, and pH) gradients, with evidence emerging for its role as a hot spot consumption of labile substrates. This inspired us conduct study evaluate whether this holds true dissolved organic matter (DOM), especially given the still mysterious origin marine recalcitrant DOM. Here, characterization DOM 21 samples (depth 1-13 m, salinity 3.9‰ 32.4‰) across 65 m transect an STE located in coastal Guangdong, China, has found systematic biotransformation toward "recalcitrant" carboxyl-rich alicyclic molecules (CRAM). fraction CRAM (%CRAM) increases from 33.1% 76.7% increasing degree degradation salinity. Further, processing DOM, including more "biolabile" lower %CRAM released aquitard, active under oxic conditions than reducing conditions. Given large quantities that recirculates through STEs globally, amount (RDOM) entering ocean after likely be considerable. While studies are needed, can gain CRAM-like compounds way.

Language: Английский

Citations

2
Forfeiting the priority effect: turnover defines biofilm community succession DOI Open Access
Colin Brislawn, Emily Graham,

Karl Dana

et al.

The ISME Journal, Journal Year: 2019, Volume and Issue: 13(7), P. 1865 - 1877

Published: March 18, 2019

Language: Английский

Citations

107
Dams shift microbial community assembly and imprint nitrogen transformation along the Yangtze River DOI
Yu Gao,

Wenlong Zhang,

Yi Li

et al.

Water Research, Journal Year: 2020, Volume and Issue: 189, P. 116579 - 116579

Published: Oct. 28, 2020

Language: Английский

Citations

101
Responses of paddy soil bacterial community assembly to different long-term fertilizations in southeast China DOI
Yongjie Yu, Meng Wu,

Evangelos Petropoulos

et al.

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 656, P. 625 - 633

Published: Nov. 26, 2018

Language: Английский

Citations

94
Multi 'omics comparison reveals metabolome biochemistry, not microbiome composition or gene expression, corresponds to elevated biogeochemical function in the hyporheic zone DOI Creative Commons
Emily Graham, Alex R. Crump, David W. Kennedy

et al.

The Science of The Total Environment, Journal Year: 2018, Volume and Issue: 642, P. 742 - 753

Published: June 17, 2018

Language: Английский

Citations

89
Using metacommunity ecology to understand environmental metabolomes DOI Creative Commons
Robert Danczak, Rosalie Chu, Sarah Fansler

et al.

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Dec. 11, 2020

Abstract Environmental metabolomes are fundamentally coupled to microbially-linked biogeochemical processes within ecosystems. However, significant gaps exist in our understanding of their spatiotemporal organization, limiting ability uncover transferrable principles and predict ecosystem function. We propose that a theoretical paradigm, which integrates concepts from metacommunity ecology, is necessary reveal underlying mechanisms governing metabolomes. call this synthesis between ecology metabolomics ‘meta-metabolome ecology’ demonstrate its utility using mass spectrometry dataset. developed three relational metabolite dendrograms molecular properties putative biochemical transformations performed ecological null modeling. Based upon modeling results, we show stochastic drove while were structured deterministically. further suggest potentially biochemically active metabolites more deterministically assembled than less metabolites. Understanding variation the influences stochasticity determinism provides way focus attention on meta-metabolomes parts most likely be important consider mechanistic models. paradigm will allow researchers study connections systems previously inaccessible detail.

Language: Английский

Citations

89