Dynamic Response of Soil Enzyme Activities in Riparian Zones: Insights From Vegetation Cover

Journal of soil science and plant nutrition, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Language: Английский

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Accelerated Organic Carbon Burial Rates Reconstructed in Elephant Butte Reservoir, New Mexico During a Megadrought

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(3)

Published: Feb. 28, 2025

Abstract Artificial lakes (reservoirs) accumulate sediment and organic carbon (OC) over time. We investigated sedimentation processes in a dryland reservoir informed OC burial potential preservation. Our study site, Elephant Butte Reservoir on the Rio Grande, New Mexico, USA receives inflows from sediment‐laden, monsoon‐driven flash floods. Using field data, historical survey river flux (water, sediment, OC) we estimated volumes rates within delta, bottom, whole during wet (1980–1988) dry (2007–2017/2019) climate periods. During severe drought (2021–2022), measured suspended concentrations for characteristic (seasonal) phases of hydrograph, monitored delta patterns, observed outflow plume dynamics. Measured (mean = 8,818 mg/l, median 1,769 mg/l) frequently surpassed hyperpycnal threshold (1,000 mg/l), especially floods (maximum 46,718 mg/l). River total content averaged 5.2% ± 12.2%, increasing to 6.3% 10.3% summer. Whole linear 3.1 1.4% (dry)–4.0 4.2% (wet) cm/yr, with higher bottom (5.0 0.3% cm/yr) than (0.8 1.1% deposition, potentially preserving OC. Comparisons suspension deposited indicate partial Estimated is conditions (391 43.6% vs. 82.4 56.4% g C/m 2 yr), suggesting that reservoirs may be efficient sinks these

Language: Английский

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Geomorphic complexity influences coarse particulate organic matter transport and storage in headwater streams

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

Published: Sept. 15, 2023

Coarse particulate organic matter (CPOM; 1–100 mm in diameter, excluding small wood) stored streams provides an important energy source for aquatic ecosystems, and CPOM transport downstream subsidies is a pathway watershed carbon export. However, we lack understanding of the magnitude processes influencing storage headwater streams. We assessed how geomorphic complexity hydrologic regime influence Colorado Front Range, USA. compared during snowmelt stream reach with high retentive feature (e.g., wood, cobbles, other features) frequency to low frequency, assessing within-a-reach context influences transport. also reaches differing valley geometry (two confined versus wide, multi-thread river bead) assess variations occurring over larger spatial extents. Additionally, accumulations ( n = 14) flowing water or dry conditions late summer investigated pieces [e.g., woody wood (>1 min length 0.05–1 diameter 0.5–1 >0.1 diameter)] storage. found that did not influenced transport, higher rate (median: 1.53 g −1 ) lower 0.13 gradient, bead. (POC) export (0.063 Mg C) form was substantially than dissolved (DOC) (12.3 one these 2022 year. Dry volume (mean 29.18 m 3 ha (15.75 ), trapped 37% accumulations. Our results demonstrate on depends scale type complexity, POC may be DOC some streams, material trapping

Language: Английский

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Spatiotemporal variations of large wood and river channel morphology in a rapidly degraded reach of an intermittent river

Earth Surface Processes and Landforms, Journal Year: 2022, Volume and Issue: 48(5), P. 997 - 1010

Published: Dec. 28, 2022

Abstract The links between rapid channel degradation and related large wood (LW) recruitment storage are still not precisely understood, especially in aquatic systems with high human natural pressures such as intermittent rivers the peri‐Mediterranean region. In this study, by using multidisciplinary research (analysis of satellite images time series, detailed field inventory, simulated hydrological data), we focused on upstream propagation (i.e., incision consequent widening) an Mediterranean river (Evrotas River, southern Greece) a response to short‐term intensive gravel extraction from active removal riparian vegetation 2013–2016 period. Subsequently, our objective was link transformation spatiotemporal changes LW channel. We found that spatially limited impact, coupled flows, allowed progression (~2 km) erosion processes (approximately twofold widening channel) during relatively short 2‐year period (2017–2019). This morphological accelerated through bank its subsequent Incision were interrupted 2019–2021 due prevalence low, geomorphologically non‐effective flows. However, continued increase result higher trapping efficiency widened channel, delay tree death final uprooting, or directly flood events. suggest freshly recruited has potential accelerate establishment new equilibrium heterogeneity interaction flows sediments.

Language: Английский

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Eco-friendly dredging methods of changing fluvial landforms for enhancing hydraulic habitat quality and river corridor continuum

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 936, P. 173439 - 173439

Published: May 23, 2024

Language: Английский

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Large wood loads in channels and on floodplains after a 500-year flood using UAV imagery in Mark Twain National Forest, Ozark Highlands, Missouri

Geomorphology, Journal Year: 2023, Volume and Issue: 431, P. 108672 - 108672

Published: March 30, 2023

Language: Английский

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Modeling the relative morphodynamic influence of vegetation and large wood in a dryland ephemeral stream, Arizona, USA

Geomorphology, Journal Year: 2022, Volume and Issue: 417, P. 108444 - 108444

Published: Sept. 16, 2022

Language: Английский

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Recognizing the ephemeral stream floodplain: Identification and importance of flood zones in drylands

Earth Surface Processes and Landforms, Journal Year: 2023, Volume and Issue: 49(1), P. 210 - 235

Published: Dec. 15, 2023

Abstract Previous syntheses of the hydrologic, geomorphic and biotic functions floodplains have largely integrated research conducted along perennial stream networks, despite a growing body literature on analogous functional floodplain zones ephemeral streams. Although variable inundation characteristic streams complicates delineation between channel floodplain, are distinct landforms that hypothesized to host similar ecosystem as floodplains, including attenuation downstream fluxes provision habitat diverse flora fauna. Here, we review dryland in order identify: (1) common definitions styles; (2) unique separate from uplands or channels; (3) current future anthropogenic natural stressors such functions; (4) knowledge gaps regarding floodplains. active follow criteria commonly used corridors, extent is typically defined by less frequent floods. A set styles emerges dependent confinement presence channelized streamflow. Functions related storage concentrated unconfined, channelled The temporary sediment subsurface water makes them disproportionately important for biogeochemical cycling hosts richer, denser more vegetation communities compared with surrounding uplands. Many also found counterparts, but flow regimes loads can potentially impact rates magnitudes comparable processes functions. Future needs incorporate holistic view corridor—including channels floodplains—to better understand fluvial cascading impacts drylands globally.

Language: Английский

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Living woody vegetation as a storage element for large wood in the channel

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 892, P. 164717 - 164717

Published: June 8, 2023

Language: Английский

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Dynamics of Organic Matter Transport, Storage, and Processing in a Non-perennial Mediterranean River Network

Ecosystems, Journal Year: 2024, Volume and Issue: 27(5), P. 636 - 654

Published: July 19, 2024

Language: Английский

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