SelectedWorks - Joseph M. Smoak

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Selected Works of Joseph M. Smoak

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Dr. Smoak's research focuses on wetland carbon sequestration and the role wetlands play in climate change. He examines freshwater wetlands and mangrove systems (coastal wetlands) to assess the wetlands current contribution to the global carbon budget, and how the contribution may change as the climate warms. These investigations are being conducted at several sites in Brazil and in the Florida Everglades. Specific research interests and projects are: Uranium and thorium series radionuclides as tracers of geological processes; organic carbon burial in wetlands; mangrove ecosystem response to sea-level change.

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About Joseph M. Smoak

Dr. Smoak's research focuses on wetland carbon sequestration and the role wetlands play in climate change. He examines freshwater wetlands and mangrove systems (coastal wetlands) to assess the wetlands current contribution to the global carbon budget, and how the contribution may change as the climate warms. These investigations are being conducted at several sites in Brazil and in the Florida Everglades. Specific research interests and projects are: Uranium and thorium series radionuclides as tracers of geological processes; organic carbon burial in wetlands; mangrove ecosystem response to sea-level change.

Peer Reviewed Articles (94)

Carbon and hydrogen isotopes of taraxerol in mangrove leaves and sediment cores: Implications for paleo-reconstructions (Ding He, S. Nemiah Ladd, Jiwoon Park, et al.) USF St. Petersburg campus Faculty Publications (2022)

Reconstructing past climate change in mangrove swamps contextualizes ongoing and future developments in these globally important ecosystems. Taraxerol, a well-recognized lipid biomarker for mangroves, is a promising target compound for calibration since it is relatively ...

Florida’s urban stormwater ponds are net sources of carbon to the atmosphere despite increased carbon burial over time (Audrey H. Goeckner, Mary G. Lusk, Alexander J. Reisinger, et al.) USF St. Petersburg campus Faculty Publications (2022)

Stormwater ponds are engineered ecosystems designed for flood control and sediment retention in urban watersheds. They are the most commonly used stormwater control measure in the USA, but their biogeochemical processes and impacts are often ...

REE Anomalies Changes in Bottom Sediments Applied in the Western Equatorial Atlantic Since the Last Interglacial (Thiago A. Sousa, Igor Martins Venancio, Eduardo Duarte Marques, et al.) USF St. Petersburg campus Faculty Publications (2022)

We reconstruct paleoredox conditions in the Western Equatorial Atlantic (WEA) over the glacial-interglacial cycle (~130 ka) by using new high-resolution REEs data and their anomalies from a marine sediment core (GL-1248) collected from the equatorial ...

Coastal riverine wetland biogeochemistry follows soil organic matter distribution along a marsh-to-mangrove gradient (Florida, USA) (Sarah A. Harttung, Kara R. Radabaugh, Ryan P. Moyer, et al.) USF St. Petersburg campus Faculty Publications (2021)

Many subtropical coastal wetland vegetation communities are transitioning from herbaceous marsh to woody mangrove, often facilitated by sea-level rise. This study investigated the relationships between vegetation community (upstream marsh, ecotone/transition, and downstream mangrove), salinity (S), ...

Effects of N addition and clipping on above and belowground plant biomass, soil microbial community structure, and function in an alpine meadow on the Qinghai-Tibetan Plateau (Weilong Liu, Yonglei Jiang, Genxu Wang, et al.) USF St. Petersburg campus Faculty Publications (2021)

Nitrogen (N) enrichment and grazing are two factors that have profound effects on grassland ecosystem processes and functions. This study evaluated separate and combined effects of clipping and N addition on soil properties, soil microbial ...

Dust storm source detection using ANP and WRF models in southwest of Iran (Esmaeil Abbasi, Hana Etemadi, Joseph M. Smoak, et al.) USF St. Petersburg campus Faculty Publications (2021)

In recent years, dust storms with huge adverse impacts on the environment have become more frequent and intense in the southwest of Iran. The first step to control or influence the dust storm process is ...

Changes in sedimentary provenance and climate off the coast of Northeast Brazil since the Last Interglacial (Thiago A. de Sousa, Igor Martins Venancio, Claudio de Morisson Valeriano, et al.) USF St. Petersburg campus Faculty Publications (2021)

Neodymium (Nd) and strontium (Sr) isotopic signatures in marine sediments reflect the geology of the associated drainage basin from which those sediments are supplied. These signatures are significantly affected by relief, weathering, transport, and deposition ...

Litter inputs drive increases in topsoil organic carbon after scrub encroachment in an alpine grassland (Weilong Liu, Xiangjun Pei, Shuming Peng, et al.) USF St. Petersburg campus Faculty Publications (2021)

Shrub encroachment into grasslands can greatly alter soil organic carbon (SOC), nitrogen (N) cycling processes, and carbon (C) pools. However, the effects of shrub encroachment on the soil microbial community and its feedback on the ...

Hypersaline tidal flats as important "blue carbon" systems: A case study from three ecosystems (Dylan R. Brown, Humberto Marotta, Roberta B. Peixoto, et al.) USF St. Petersburg campus Faculty Publications (2021)

Hypersaline tidal flats (HTFs) are coastal ecosystems with freshwater deficits often occurring in arid or semiarid regions near mangrove supratidal zones with no major fluvial contributions. Here, we estimate that organic carbon (OC), total nitrogen ...

Reply to Comment by R. Parkinson on “Increasing Rates of Carbon Burial in Southwest Florida Coastal Wetlands” by J. Breithaupt et al. (Joshua L. Breithaupt, Joseph M. Smoak, Thomas S. Bianchi, et al.) USF St. Petersburg campus Faculty Publications (2021)

Breithaupt et al. (2020, https://doi.org/10.1029/2019JG005349) investigated why rates of organic carbon (OC) burial in coastal wetlands appear to increase over the past ∼120 years. After comparing dating methods and applying biogeochemical analyses, we concluded that ...

Investigation of atmospheric conditions associated with a storm surge in the south-west of Iran (Esmaeil Abbasi, Hana Etemadi, Joseph M. Smoak, et al.) USF St. Petersburg campus Faculty Publications (2021)

Severe thunderstorms are often accompanied by strong vertical air currents, temporary wind gusts, and heavy rainfall. The development of this atmospheric phenomenon over tropical shallow water zones, such as bays, can lead to intensification of ...

Spatiotemporal pattern of degradation in arid mangrove forests of the Northern Persian Gulf (Hana Etemadi, Joseph M. Smoak and Esmaeil Abbasi) USF St. Petersburg campus Faculty Publications (2021)

Climate change is a major threat to mangrove ecosystems worldwide but particularly those in arid regions that exist near the limit of tolerance to extremes in temperature, precipitation, and salinity. Here we examine Persian Gulf ...

Warming Affects Soil Nitrogen Mineralization via Changes in Root Exudation and Associated Soil Microbial Communities in a Subalpine Tree Species Abies fabri (Weilong Liu, Yonglei Jiang, Yan Su, et al.) USF St. Petersburg campus Faculty Publications (2021)

The objective of this study was to quantify the responses of root exudates and nitrogen (N) mineralization of Abies fabri to warming and to identify links between root exudation and microbial N mineralization via interactions ...

Residential radon exposure and seasonal variation in the countryside of southeastern Brazil (Camila Rodrigues e Silva, Joseph M. Smoak and Emmanoel Vieira da Silva-Filho) USF St. Petersburg campus Faculty Publications (2020)

Poorly ventilated environments such as residences can accumulate radon gas to levels that are harmful to humans and thus produce a public health risk. To assess the risk from natural radiation due to indoor radon ...

Carbon and nutrient accumulation in mangrove sediments affected by multiple environmental changes (Alexander Perez, Wilson Machado, Dimitri Gutierrez, et al.) USF St. Petersburg campus Faculty Publications (2020)

Purpose: In order to assess the impact of anthropogenic activities on carbon and nutrient accumulation, total organic carbon (TOC), nitrogen (TN), and phosphorus (TP) accumulation rates were examined in a 210Pb-dated mangrove sediment core from ...

Effect of deep Southwestern Subtropical Atlantic Ocean circulation on the biogeochemistry of mercury during the last two glacial/interglacial cycles (Thiago S. Figueiredo, Thiago P. Santos, Karen B. Costa, et al.) USF St. Petersburg campus Faculty Publications (2020)

During glacial/interglacial cycles, changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) modified the intermediate and deep-water mass proportions and high latitude productivity in the Atlantic Ocean. These factors influence the distribution and ...

Increasing Rates of Carbon Burial in Southwest Florida Coastal Wetlands (Joshua L. Breithaupt, Joseph M. Smoak, Thomas S. Bianchi, et al.) USF St. Petersburg campus Faculty Publications (2020)

Rates of organic carbon (OC) burial in some coastal wetlands appear to be greater in recent years than they were in the past. Possible explanations include ongoing mineralization of older OC or the influence of ...

Changes in growth and soil microbial communities in reciprocal grafting clones between Populus deltoides males and females exposed to water deficit conditions (Weilong Liu, Yanping Wang, Xu Gong, et al.) USF St. Petersburg campus Faculty Publications (2019)

Key message. Our findings highlight that male-rooted clones (M/M and F/M) of Populus deltoides are more water-deficit tolerant than female-rooted clones (F/F and M/F), as shown by a smaller decrease in total biomass and net ...

Chronic prescribed burning alters nutrient deposition and sediment stoichiometry in a lake ecosystem (Matthew N. Waters, Alexander P. Metz, Joseph M. Smoak, et al.) USF St. Petersburg campus Faculty Publications (2019)

Prescribed fire is a common management practice for forests and other terrestrial environments. Following a prescribed burn, ash erodes into aquatic environments potentially altering terrestrial–aquatic connectivity and water quality. In this study, we collected a ...

Comparing the biogeochemistry of storm surge sediments and pre-storm soils in coastal wetlands: Hurricane Irma and the Florida Everglades (Joshua L. Breithaupt, Nia Hurst, Havalend E. Steinmuller, et al.) USF St. Petersburg campus Faculty Publications (2019)

Hurricanes can alter the rates and trajectories of biogeochemical cycling in coastal wetlands. Defoliation and vegetation death can lead to increased soil temperatures, and storm surge can variously cause erosion or deposition of sediment leading ...

Correction to: Chronic prescribed burning alters nutrient deposition and sediment stoichiometry in a lake ecosystem (Ambio, (2018), 10.1007/s13280-018-1094-z) (Matthew N. Waters, Alexander P. Metz, Joseph M. Smoak, et al.) USF St. Petersburg campus Faculty Publications (2019)

The publication contained a dating model that was based on AD/BC dates instead of years before present (YBP) dates for the three C 14 AMS values. As a result, dates reported as YBP should be ...

Large variability in organic carbon and CaCO3 burial in seagrass meadows: A case study from three Australian estuaries (Christian J. Sanders, Damien T. Maher, Joseph M. Smoak, et al.) USF St. Petersburg campus Faculty Publications (2019)

Blue carbon refers to the carbon accumulation capacity of vegetated coastal habitats, including salt marshes, mangroves forests and seagrass meadows. Here we present estimates of organic carbon (Corg) and calcium carbonate (CaCO3) burial rates from ...

Role of carbonate burial in Blue Carbon budgets (V Saderne, N R Geraldi, P I Macreadie, et al.) USF St. Petersburg campus Faculty Publications (2019)

Calcium carbonates (CaCO3) often accumulate in mangrove and seagrass sediments. As CaCO3 production emits CO2, there is concern that this may partially offset the role of Blue Carbon ecosystems as CO2 sinks through the burial ...

Seasonal changes in labile organic matter as a function of environmental factors in a relict permafrost region on the Qinghai-Tibetan Plateau (Guimin Liu, Xiaolan Zhang, Tonghua Wu, et al.) USF St. Petersburg campus Faculty Publications (2019)

Labile organic matter plays an important role in permafrost carbon cycling, however, little is known about the effects of permafrost on labile organic matter dynamics. Here, we examined seasonal changes in the labile organic matter ...

Seasonal changes in labile organic matter as a function of environmental factors in a relict permafrost region on the Qinghai-Tibetan Plateau (G. Liu, Xiaolan Zhang, T. Wu, et al.) USF St. Petersburg campus Faculty Publications (2019)

Labile organic matter plays an important role in permafrost carbon cycling, however, little is known about the effects of permafrost on labile organic matter dynamics. Here, we examined seasonal changes in the labile organic matter ...