Drylands compose approximately 40% of the earth’s land surface; a hallmark of these systems is low average soil moisture and infrequent precipitation (or irrigation) which limit biogeochemical cycling rates. However, following a re-wetting event, soil metabolism can recover with…
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Microbial activity is known to impact the formation and alteration of many different rock types. For carbonate caprock (CCR), a lithology found on salt diapirs, it is generally accepted that microbial activity drives the precipitation of carbonate minerals, forming limestone and…
Iron (Fe) is present over a very wide range of redox conditions and is one of most the important nutrients for phytoplankton growth in the ocean. In a marine environment, Fe composition in the sediments is intimately linked to the chemistry of the waters from which they precipit…
The project goal was to develop a detection method of biological response to metal contamination in mosses using a non-destructive laser induced fluorescence (LIF) technique. Moss was selected due to its long history of use in tracing atmospheric deposition of heavy metals and n…
Grasslands over a quarter of land free area and due to large carbon (C) stock they represent a key global C pool. Grassland soil C sequestration is an alternative method for reduction of atmospheric carbon dioxide (CO2) which can also deliver other benefits including greater eco…
Nitrate is the most common limiting nutrient in the ocean and plays a critical role in the extent and intensity of marine primary production, and therefore the global ocean’s biological pump. Characterization of the supply and demand of nitrate constrains how ocean biology may r…
The following dissertation contains three studies that use sediment cores to reconstruct past changes in the climate and environment of a tropical lagoon system. These studies provide insight into past droughts and coastal change during geologically recent climate variability an…
In the Sichuan Basin and surrounding areas, the terminal Ediacaran Dengying Formation hosts diverse microbialite forms. Interest in this formation has mainly centered around oil and gas reservoir development, but recent research aims to characterize its paleobiology via petrogra…
Stable isotope analysis is a powerful tool that can be used to describe a population’s foraging niche by identifying basal resource use, trophic feeding levels, environmental stability, seasonal ecological variation, important shifts in life history, ontogenetic shifts, intraspe…
Glaciers are an integral part of polar and alpine landscapes, providing water, inorganic, and organic material subsidies to downstream ecosystems. These subsides regulate downstream temperature, streamflow, and sediment supplies. Warming in high altitude and high latitude enviro…
The biogeochemical behaviour of plutonium and americium was investigated in contaminated soils from the UK to help determine possible remediation and management options. Stimulating anoxic sediments from Aldermaston, through the addition of a carbon substrate (glucose), induced …
Soil processes and the carbon cycle
by Lal, R.
fromAdvances in soil science (Boca Raton, Fla.)
0
Type: Book
The Environmental Chemistry of Aluminum provides a comprehensive, fundamental account of the aqueous chemistry of aluminum within an environmental context. An excellent reference for environmental chemists and scientific administrators of environmental programs, this book contai…
"Aspects of the biogeochemistry of estuaries from a variety of environments, from the topics to the Arctic, are discussed. In most cases the courses of these rivers have been altered by dams or diversions; the results of these changes on the nature of the estuary are also discus…
Understanding the temporal and depth-related spatial controls on microbial functional redundancy and community interactions remains a central issue in microbial ecology and Critical Zone science. Microorganisms are influenced by and influence biogeochemical reactions in the soil…
Reactive iron mineral coatings in redox transition zones play an important role in contaminant attenuation. These mineral coatings include poorly crystalline to crystalline iron sulfides, carbonates, and oxyhydroxides, and are a signature of the biogeochemical processes occurrin…
Over the last few decades, new technologies in the form of observational satellites, measurement instruments, and model simulations have enabled the scientific community to make substantial strides to understand the drivers, mechanics, and impacts of climate change. This dissert…
The oceanic uptake of atmospheric CO2 is of global importance as it affects the pace of climate change. The Arctic Ocean acts as a carbon sink for atmospheric CO2, benefiting from high solubility of CO2 in cold seawater and high summer biological production. It has been known th…