Subsurface groundwater-surface water mixing zones (hyporheic zones) have enhanced biogeochemical activity, but assembly processes governing subsurface microbiomes remain a critical uncertainty in understanding hyporheic biogeochemistry. To address this obstacle, we investigated (a) biogeographical patterns attached and waterborne across three hydrologically-connected, physicochemically-distinct (inland hyporheic, nearshore river); (b) that generated these patterns; (c) groups of organisms...

Community assembly processes generate shifts in species abundances that influence ecosystem cycling of carbon and nutrients, yet our understanding remains largely separate from ecosystem-level functioning. Here, we investigate relationships between changes microbial metabolism across space time hyporheic communities. We pair sampling two habitat types (i.e., attached planktonic) through seasonal sub-hourly hydrologic fluctuation with null modeling temporally-explicit multivariate statistics....

Abstract In light of increasing terrestrial carbon (C) transport across aquatic boundaries, the mechanisms governing organic (OC) oxidation along terrestrial‐aquatic interfaces are crucial to future climate predictions. Here we investigate biochemistry, metabolic pathways, and thermodynamics corresponding OC in Columbia River corridor using ultrahigh‐resolution C characterization. We leverage natural vegetative differences encompass variation inputs. Our results suggest that decreases...

The hyporheic zone (HZ) is the active ecotone between surface stream and groundwater, where exchanges of nutrients organic carbon have been shown to stimulate microbial activity transformations nitrogen. To examine relationship sediment texture, biogeochemistry, biological in Columbia River HZ, grain size distributions for samples were characterized define geological facies, relationships among physical properties physicochemical attributes local environment, structure associated communities...

Recently, recognition of negative environmental impacts associated with overuse pesticides in the agricultural regions Bangladesh has made it clear that unsustainable pest-control strategies must change. Integrated Pest Management (IPM) was developed for use as a tool production healthy, sustainably grown food. A strategic approach to crop-pest control, IPM aims minimize pest populations by combining environmentally friendly methods and economically viable farming practices. This study...

Abstract. The parafluvial hyporheic zone combines the heightened biogeochemical and microbial interactions indicative of a region with direct atmospheric/terrestrial inputs effects wet–dry cycles. Therefore, understanding cycling in this ecotone is fundamental to at aquatic–terrestrial interface creating robust hydrobiogeochemical models dynamic river corridors. We aimed (i) characterize differences across small spatial domain (6 lateral meters) that spans breadth inundation histories (ii)...

Using biochar to remove phosphorus (P) from wastewater has the potential improve surface water quality and recycle recovered P as a fertilizer. In this research, effects of iron modification on sorption behavior molecular characterization two different biochars an activated carbon were studied. A produced cow manure anaerobic digest fibers (AD) pyrolyzed under NH 3 gas had greatest phosphate capacity (2300 mg/kg), followed by (AC) (1500 then coniferous forest biomass (BN) (300 mg/kg)....

Biodiversity is thought to prevent decline in community function response changing environmental conditions through replacement of organisms with similar functional capacity but different optimal growth characteristics. We examined how this concept translates the within-gene level by exploring seasonal dynamics diversity for genes involved nitrogen cycling hyporheic zone communities. Nitrification displayed low richness—defined as number unique phylotypes—across seasons. Conversely,...

Microbially-derived carbon inputs to soils play an important role in forming soil organic matter (SOM), but detailed knowledge of basic mechanisms (C) cycling, such as stabilization C compounds originating from rhizodeposition, is scarce. This study aimed investigate the stability rhizosphere-produced components a model laboratory mesocosm Pinus resinosa grown designed mineral mix with limited nutrients. We utilized suite advanced imaging and molecular techniques obtain molecular-level...

Hydrologic exchange is a crucial component of the water cycle. The strength directly affects biogeochemical and ecological processes that occur in hyporheic zone aquifer from micro to reach scales. fluxes (HEFs) can be quantified using many field measurement approaches, however, relatively large river (scale > 103 m), these approaches are limited by site accessibility, difficulty performing representative sampling, complexity geomorphologic features subsurface properties. In rivers...

Biochar (BC) use in water treatment is a promising approach that can simultaneously help address societal needs of clean water, food security, and climate change mitigation. However, novel BC technology approaches require operational testing field pilot-scale scenarios to advance their readiness assessment. Therefore, the objective this study evaluate system performance integrated into hydrous ferric oxide reactive filtration (Fe-BC-RF) with without catalytic ozonation (CatOx) process...

Abstract. Soil respiration is a key ecosystem function whereby shifts in rates can shift systems from carbon sinks to sources. permafrost-associated particularly important given climate change driven permafrost thaw that leads significant uncertainty resulting dynamics. Here we characterize the spatial structure and environmental drivers of soil across transition zone. We find characterized by non-linear threshold occurs at active-layer depths greater than 140 cm. also within each season,...

Soil microbial communities affect the formation of micro-scale mineral-associated organic matter (MAOM) where complex processes, including adhesion, aggregate formation, mineral weathering and soil stabilization occur in a narrow zone large biogeochemical gradients. Here we designed field study to examine carbon mechanisms by using in-growth mesh bags containing biotite that were placed ponderosa pine root for 6 months compared surrounding bulk soil. We sought determine composition community...

In light of increasing terrestrial carbon (C) transport across aquatic boundaries, the mechanisms governing organic (OC) oxidation along terrestrial-aquatic interfaces are crucial to future climate predictions. Here, we investigate biochemistry, metabolic pathways, and thermodynamics corresponding OC in Columbia River corridor using ultra-high resolution C characterization. We leverage natural vegetative differences encompass variation inputs. Our results suggest that decreases deposition...

Community assembly processes generate shifts in species abundances that influence ecosystem cycling of carbon and nutrients, yet our understanding remains largely separate from ecosystem-level functioning. Here, we investigate relationships between changes microbial metabolism across space time hyporheic communities. We pair sampling two habitat types ( i.e. , attached planktonic) through seasonal sub-hourly hydrologic fluctuation with null modeling temporally-explicit multivariate...

Abstract The subsurface transport of dissolved reactive phosphorus (DRP) from artificially drained agricultural fields can impair water quality, especially in no‐till fields. distribution soil P the wheat ( Triticum aestivum L.)‐dominated Palouse region inland U.S. Pacific Northwest varies greatly due to its steep and complex topography, a legacy (∼130 yr) excessive erosion deposition processes. primary goal this research was better understand magnitude temporal dynamics DRP export an...

Community assembly processes generate shifts in species abundances that influence ecosystem cycling of carbon and nutrients, yet our understanding remains largely separate from ecosystem-level functioning. Here, we investigate relationships between changes microbial metabolism across space time hyporheic communities. We pair sampling two habitat types (i.e., attached planktonic) through seasonal sub-hourly hydrologic fluctuation with null modeling temporally-explicit multivariate statistics....

Bangladesh has experienced a number of severe natural disasters. Most recently, tropical storms Aila, Sidr and Mohaseen have affected the Kuakata coastal belt. These disasters had substantial negative impacts on resources. Development coping strategies for protection resources across this belt is significantly important. The present research focused effects crops, humans, fish, livestock infrastructure. There were 99 fatalities recorded during Aila impacted 910.94 ha (Sidr) 973.69 (Aila)...

In the Lake Tahoe Basin in California and Nevada (USA), managing nutrient export from watersheds into streams lake is a significant challenge that needs to be addressed improve water quality. Leaching runoff of phosphorus (P) soils major source lake, P loading potential different varies as function landscape ecosystem properties, how watershed managed. this research, availability speciation forest meadow were measured at two with parent material types. Soils developed on andesitic materials...

The use of biochar in water resource and recovery facilities (WRRF) shows promise for phosphorus (P) to as a biochar-based fertilizer (BBF) that can replace conventional fertilizers, promote carbon sequestration, improve soil quality. In this study, was recovered after being dosed into secondary-treated discharge from municipal WRRF. value the BBF tested lettuce (Lactuca sativa) growth trial. compared an inorganic fertilizer, raw biochar, controls had either only nitrogen (N) or no...

ABSTRACT Biodiversity is thought to prevent decline in community function response changing environmental conditions through replacement of organisms with similar functional capacity but different optimal growth characteristics. We examined how this concept translates the within-gene level by exploring seasonal dynamics diversity for genes involved nitrogen cycling hyporheic zone communities. Nitrification displayed low richness— defined as number unique phylotypes—across seasons....

Summary Subsurface groundwater-surface water mixing zones (hyporheic zones) have enhanced biogeochemical activity, but assembly processes governing subsurface microbiomes remain a critical uncertainty in understanding hyporheic biogeochemistry. To address this obstacle, we investigated (a) biogeographical patterns attached and waterborne across three hydrologically-connected, physicochemically-distinct (inland hyporheic, nearshore river); (b) that generated these patterns; (c) groups of...