scholarly journals Importance of the fiddler crab Uca pugnax to salt marsh soil organic matter accumulation

2010 ◽  
Vol 414 ◽  
pp. 167-177 ◽  
Author(s):  
CR Thomas ◽  
LK Blum
Keyword(s):  
Organic Matter ◽  
Salt Marsh ◽  
Soil Organic Matter ◽  
Fiddler Crab ◽  
Uca Pugnax ◽  
Marsh Soil ◽  
Organic Matter Accumulation ◽  
Salt Marsh Soil

Oxidases and hydrolases mediate soil organic matter accumulation in chernozem of northeastern China

Geoderma ◽  
2021 ◽  
Vol 403 ◽  
pp. 115206
Author(s):  
Guohui Wu ◽  
Zhenhua Chen ◽  
Dongqi Jiang ◽  
Nan Jiang ◽  
Hui Jiang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Northeastern China ◽  
Organic Matter Accumulation

scholarly journals Machine-Learning Classification of Soil Bulk Density in Salt Marsh Environments

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4408
Author(s):  
Iman Salehi Hikouei ◽  
S. Sonny Kim ◽  
Deepak R. Mishra
Keyword(s):  
Machine Learning ◽  
Remote Sensing ◽  
Salt Marsh ◽  
Bulk Density ◽  
Remote Sensing Data ◽  
Soil Bulk Density ◽  
Soil Samples ◽  
Marsh Soil ◽  
Landsat 7 ◽  
Salt Marsh Soil

Remotely sensed data from both in situ and satellite platforms in visible, near-infrared, and shortwave infrared (VNIR–SWIR, 400–2500 nm) regions have been widely used to characterize and model soil properties in a direct, cost-effective, and rapid manner at different scales. In this study, we assess the performance of machine-learning algorithms including random forest (RF), extreme gradient boosting machines (XGBoost), and support vector machines (SVM) to model salt marsh soil bulk density using multispectral remote-sensing data from the Landsat-7 Enhanced Thematic Mapper Plus (ETM+) platform. To our knowledge, use of remote-sensing data for estimating salt marsh soil bulk density at the vegetation rooting zone has not been investigated before. Our study reveals that blue (band 1; 450–520 nm) and NIR (band 4; 770–900 nm) bands of Landsat-7 ETM+ ranked as the most important spectral features for bulk density prediction by XGBoost and RF, respectively. According to XGBoost, band 1 and band 4 had relative importance of around 41% and 39%, respectively. We tested two soil bulk density classes in order to differentiate salt marshes in terms of their capability to support vegetation that grows in either low (0.032 to 0.752 g/cm3) or high (0.752 g/cm3 to 1.893 g/cm3) bulk density areas. XGBoost produced a higher classification accuracy (88%) compared to RF (87%) and SVM (86%), although discrepancies in accuracy between these models were small (<2%). XGBoost correctly classified 178 out of 186 soil samples labeled as low bulk density and 37 out of 62 soil samples labeled as high bulk density. We conclude that remote-sensing-based machine-learning models can be a valuable tool for ecologists and engineers to map the soil bulk density in wetlands to select suitable sites for effective restoration and successful re-establishment practices.

Impact of sea level change on coastal soil organic matter, priming effects and prokaryotic community assembly

2019 ◽  
Vol 95 (10) ◽  
Author(s):  
Thomas Dinter ◽  
Simone Geihser ◽  
Matthias Gube ◽  
Rolf Daniel ◽  
Yakov Kuzyakov
Keyword(s):  
Organic Matter ◽  
Salt Marsh ◽  
Soil Organic Matter ◽  
Salt Marshes ◽  
Extracellular Enzymes ◽  
Rrna Gene ◽  
Co2 Efflux ◽  
Prokaryotic Community ◽  
Priming Effects ◽  
Niche Adaptation

ABSTRACT Salt marshes are coastal areas storing high amounts of soil organic matter (SOM) while simultaneously being prone to tidal changes. Here, SOM-decomposition and accompanied priming effects (PE), which describe interactions between labile and old SOM, were studied under controlled flooding conditions. Soil samples from two Wadden Sea salt marsh zones, pioneer (Pio), flooded two times/day, and lower salt marsh (Low), flooded ∼eight times/month, were measured for 56 days concerning CO2-efflux and prokaryotic community shifts during three different inundation-treatments: total-drained (Drained), all-time-flooded (Waterlogged) or temporal-flooding (Tidal). Priming was induced by 14C-glucose addition. CO2-efflux from soil followed Low>Pio and Tidal>Drained>Waterlogged, likely due to O2-depletion and moisture maintenance, two key factors governed by tidal inundation with regard to SOM mineralisation. PEs in both zones were positive (Drained) or absent (Waterlogged, Tidal), presumably as a result of prokaryotes switching from production of extracellular enzymes to direct incorporation of labile C. A doubled amount of prokaryotic biomass in Low compared to Pio probably induced higher chances of cometabolic effects and higher PE. 16S-rRNA-gene-amplicon-based analysis revealed differences in bacterial and archaeal community composition between both zones, revealing temporal niche adaptation with flooding treatment. Strongest alterations were found in Drained, likely due to inundation-mediated changes in C-binding capacities.

scholarly journals Nocardiopsis halotolerans sp. nov., isolated from salt marsh soil in Kuwait.

2002 ◽  
Vol 52 (2) ◽  
pp. 525-529 ◽  
Author(s):  
Sheikha S Al-Zarban ◽  
Ibrahim Abbas ◽  
Azza A Al-Musallam ◽  
Ulrike Steiner ◽  
Erko Stackebrandt ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Marsh Soil ◽  
Salt Marsh Soil

No Evidence for Long-term Impacts of Oil Spill Contamination on Salt Marsh Soil Nitrogen Cycling Processes

2020 ◽  
Vol 43 (4) ◽  
pp. 865-879
Author(s):  
Charles A. Schutte ◽  
John M. Marton ◽  
Anne E. Bernhard ◽  
Anne E. Giblin ◽  
Brian J. Roberts
Keyword(s):  
Salt Marsh ◽  
Nitrogen Cycling ◽  
Oil Spill ◽  
Soil Nitrogen ◽  
Marsh Soil ◽  
Salt Marsh Soil ◽  
Soil Nitrogen Cycling
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