Soil hydrology, physical and chemical properties and the distribution of carbon and mercury in a postglacial lake-plain wetland

Nave, Lucas E.; Drevnick, Paul E.; Heckman, Katherine; Hofmeister, K.; Veverica, Timothy J.; Swanston, Christopher W.

doi:10.1016/j.geoderma.2017.05.035

Cited by 16 publications

(20 citation statements)

References 83 publications

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“…Despite the correlations between THg and C (Table 4), THg concentration does not decrease down the profile in the same manner as C. For THg concentrations apart from pond center, the 0‐ to 2‐cm and 2‐ to 5‐cm increments are not statistically different, with the 5‐ to 10‐cm and 10‐ to 15‐cm increments being less than the increment before (Table 5). A similar trend has been observed across horizons in a lake‐plain wetland, where C concentration decreased with each horizon, whereas THg concentration peaked in the middle horizon (Nave et al, 2017). Other studies have explored the implications of SOM decomposition on Hg binding.…”

Section: Resultssupporting

confidence: 75%

“…Because of the affiliation of Hg with SOM, pedological concepts relating to SOM, such as differential horizon accumulation and SOM accumulation downslope in a catena, can also be used to predict the distribution of Hg in the landscape (Grigal, 2003). Total Hg and C pools in a lake‐plain wetland have been attributed to depth of soil, which varied by landscape position (Nave et al, 2017). Landscape position can also affect soil moisture, aeration, texture, chemical composition, plant association, and nutrient regime of microorganisms, which can influence SOM and related processes (Gladkova and Malinina, 1999).…”

Section: Resultsmentioning

confidence: 99%

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Factors Affecting Soil Total Mercury in Seasonal Pond Basins within a Northern Hardwood Forest in Minnesota, USA

Boche

DeSutter

Kolka

2019

Soil Science Soc of Amer J

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Forest canopies are sites for mercury (Hg) deposition, and forests can act as Hg sources to downstream aquatic environments. This study examined soil total Hg (THg), carbon (C), and nitrogen (N) to 15 cm in 10 seasonal pond basins in a northern hardwood forest in Minnesota. Pools (mass per area) and concentrations (mass per soil mass) of THg to 15 cm were lower in uplands than in ponds, indicating downslope transport. In uplands, THg concentrations were the same at 0‐ to 2‐cm and 2‐ to 5‐cm depths and then decreased, whereas THg density (mass per volume) peaked at 2 to 5 cm, highlighting the importance of bulk density on mass. Carbon and N trends were similar to THg. Apart from pond centers, strong positive relationships between THg and C were observed. Upland slope length, graminoid cover, basin area, and tree height accounted for over half of THg variance at pond edge. Understanding the distribution, trends, and contributing factors of soil THg can further efforts toward immobilization and sequestration, thus minimizing the potential for bioaccumulation. Core Ideas THg uniform among basins in uplands with pond centers variable by substrate. THg greatest at pond center and uniform among upland landscape positions. Positive THg relationships with C and N, except organic pond centers. Upland THg concentration peaked at 0 to 5 cm, with mass peaking at 2 to 5 cm. Fifty‐six percent of THg pool was explained by slope length, graminoid cover, basin area, and tree height.

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Section: Resultssupporting

confidence: 75%

Section: Resultsmentioning

confidence: 99%

Factors Affecting Soil Total Mercury in Seasonal Pond Basins within a Northern Hardwood Forest in Minnesota, USA

Boche

DeSutter

Kolka

2019

Soil Science Soc of Amer J

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“…In the middle (about 1 km) of the watershed, soils are finer textured with restrictive glacial till close to the surface (Alfic Haplorthods, Alfic Epiaqods, Mollic Endoaquents) promoting episaturation and surface water in stream channels. Below 190‐m elevation, the outwash‐lake plain wetland soils are Terric Haplosaprists with consistent groundwater levels within 10 cm of the surface and perennial surface water in the stream (Nave, Drevnick, et al, ). Several seasonal sand tracks run through the watershed and a paved road runs between the mid and mouth flumes roughly parallel to the 190‐m contour line.…”

Section: Methodsmentioning

confidence: 99%

“…Soils were sampled at locations throughout the wetland ( n = 27) and upland ( n = 23) areas of the watershed for separate projects (2014–2017) and are being used in this analysis to provide context for the DOC δ 13 C measured in the stream water. Wetland soil sampling methods are described in Nave, Drevnick, et al (). Upland soils were collected as genetic horizons via pit‐face or AMS slide‐hammer coring.…”

Section: Methodsmentioning

confidence: 99%

“…The Honeysuckle Creek watershed and surrounding landscape is characterized by glacial and postglacial landforms that were formed in drift deposited at the end of the Laurentian glaciation (14,000-10,000 years before present) and modified by large, postglacial lakes (Lake Algonquin, Lake Nippissing; Spurr & Zumberge, 1956;Blewett & Winters, 1995;Lapin & Barnes, 1995). The limestone and (Nave, Drevnick, et al, 2017). Several seasonal sand tracks run through the watershed and a paved road runs between the mid and mouth flumes roughly parallel to the 190-m contour line.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal dynamics and exports of elements from a first‐order stream to a large inland lake in Michigan

Hofmeister

Nave

Drevnick

et al. 2019

Hydrological Processes

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Headwater streams are critical components of drainage systems, directly connecting terrestrial and downstream aquatic ecosystems. The amount of water in a stream can alter hydrologic connectivity between the stream and surrounding landscape and is ultimately an important driver of what constituents headwater streams transport. There is a shortage of studies that explore concentration–discharge (C‐Q) relationships in headwater systems, especially forested watersheds, where the hydrological and ecological processes that control the processing and export of solutes can be directly investigated. We sought to identify the temporal dynamics and spatial patterns of stream chemistry at three points along a forested headwater stream in Northern Michigan and utilize C‐Q relationships to explore transport dynamics and potential sources of solutes in the stream. Along the stream, surface flow was seasonal in the main stem, and perennial flow was spatially discontinuous for all but the lowest reaches. Spring snowmelt was the dominant hydrological event in the year with peak flows an order of magnitude larger at the mouth and upper reaches than annual mean discharge. All three C‐Q shapes (positive, negative, and flat) were observed at all locations along the stream, with a higher proportion of the analytes showing significant relationships at the mouth than at the mid or upper flumes. At the mouth, positive (flushing) C‐Q shapes were observed for dissolved organic carbon and total suspended solids, whereas negative (dilution) C‐Q shapes were observed for most cations (Na+, Mg2+, Ca2+) and biologically cycled anions (NO3−, PO43−, SO42−). Most analytes displayed significant C‐Q relationships at the mouth, indicating that discharge is a significant driving factor controlling stream chemistry. However, the importance of discharge appeared to decrease moving upstream to the headwaters where more localized or temporally dynamic factors may become more important controls on stream solute patterns.

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Core microbiota play important roles in maintaining soil multi‐nutrient cycling in lakeshore wetland of plateau lake Caohai

Sun,

Qiu,

et al. 2023

Land Degrad Dev

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Microorganisms play important roles in soil biogeochemical processes, but the relative contributions of different microbial members in soil nutrient cycling and community maintenance are unclear especially in wetland soils with water‐level fluctuation. Here, soil samples, collected from severe inundation zone (SIZ), wet–dry cycling zone (WIZ), and arid zone (NIZ) of the lakeshore wetland of plateau lake Caohai, were used to investigate the relative contributions of core and rare taxa in maintaining nutrient cycling and their associations with microbial network. Results showed that WIZ exhibited higher extracellular enzyme activities including β‐1,4‐N‐acetylglucosaminidase, L‐leucine aminopeptidase, and acid phosphatase, the level of multi‐nutrient cycling and core microbial diversity compared with the NIZ and SIZ. The values of topological features (i.e., links, average degree, clustering coefficient, and graph density) were also higher in the WIZ compared with the NIZ and SIZ. Moreover, the core taxa, specifically their community structures, were the most important driver for multi‐nutrient cycles of wetland soil. Among these taxa, Sphingomonas, Bradyrhizobium, Mortierella, and Fusarium as the most abundant taxa in lakeshore wetlands were significantly positively correlated with most extracellular enzymes. By contrast, rare taxa showed higher degree and its subnetwork complexity than those of core taxa, which potentially serve as the species pool of core taxa to maintaining the microbial community stability. In conclusion, our study suggested that core taxa play dominant roles in soil nutrient cycles, while rare microbiota could greatly influence microbial interaction under hydrological changes.

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Soil hydrology, physical and chemical properties and the distribution of carbon and mercury in a postglacial lake-plain wetland

Cited by 16 publications

References 83 publications

Factors Affecting Soil Total Mercury in Seasonal Pond Basins within a Northern Hardwood Forest in Minnesota, USA

Factors Affecting Soil Total Mercury in Seasonal Pond Basins within a Northern Hardwood Forest in Minnesota, USA

Seasonal dynamics and exports of elements from a first‐order stream to a large inland lake in Michigan

Core microbiota play important roles in maintaining soil multi‐nutrient cycling in lakeshore wetland of plateau lake Caohai

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