Biogeochemical Contributions of Tree Islands to Everglades Wetland Landscape Nitrogen Cycling During Seasonal Inundation

Troxler, Tiffany G.; Childers, Daniel L.

doi:10.1007/s10021-009-9302-0

Cited by 13 publications

(10 citation statements)

References 51 publications

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“…At the beginning of agricultural development, large amounts of tree island wetlands were distributed in the MulengeXingkai Plain, which are similar landscapes as those in the Florida Everglades (Troxler and Childers, 2010). Tree islands were the first to be converted to cropland due to its micro-geomorphological suitability, thus causing the rapid decrease in NP from 1954 to 1986.…”

Section: Percentage Of Study Area (%) Wetland Area (Ha)mentioning

confidence: 99%

Wetlands shrinkage, fragmentation and their links to agriculture in the Muleng–Xingkai Plain, China

Song

Wang

et al. 2012

Journal of Environmental Management

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Section: Percentage Of Study Area (%) Wetland Area (Ha)mentioning

confidence: 99%

Wetlands shrinkage, fragmentation and their links to agriculture in the Muleng–Xingkai Plain, China

Song

Wang

et al. 2012

Journal of Environmental Management

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“…The formation of carbonate sediments could also play an important role in locally altering the underlying hydraulic properties of the tree islands sediments. Both at Satinleaf and on a tree island in the central Everglades, the aquifer hydraulic conductivities (1∙01–43∙20 m day −1 ; Troxler and Childers, ) were greater than aquifer hydraulic conductivities reported for Everglades peat (0∙56 m day −1 ; Harvey et al ., , ). The specific yield of tree island soils was slightly lower than that of Everglades peats, which typically range from 0∙10 to 0∙32, (Myers, ; Sullivan et al ., ).…”

Section: Discussionmentioning

confidence: 99%

The influence of vegetation on the hydrodynamics and geomorphology of a tree island in Everglades National Park (Florida, United States)

et al. 2013

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Transpiration‐driven nutrient accumulation has been identified as a potential mechanism governing the creation and maintenance of wetland vegetation patterning. This process may contribute to the formation of nutrient‐rich tree islands within the expansive oligotrophic marshes of the Everglades (Florida, United States). This study presents hydrogeochemical data indicating that tree root water uptake is a primary driver of groundwater ion accumulation across one of these islands. Sap flow, soil moisture, water level, water chemistry, and rainfall were measured to identify the relationships between climate, transpiration, and groundwater uptake by phreatophytes and to examine the effect this uptake has on groundwater chemistry and mineral formation in three woody plant communities of differing elevations. During the dry season, trees relied more on groundwater for transpiration, which led to a depressed water table and the advective movement of groundwater and dissolved ions, including phosphorus, from the surrounding marsh towards the centre of the island. Ion exclusion during root water uptake led to elevated concentrations of all major dissolved ions in the tree island groundwater compared with the adjacent marsh. Groundwater was predominately supersaturated with respect to aragonite and calcite in the lower‐elevation woody communities, indicating the potential for soil formation. Elevated groundwater phosphorous concentrations detected in the highest‐elevation woody community were associated with the leaching of inorganic sediments (i.e. hydroxyapatite) in the vadose zone. Understanding the complex feedback mechanisms regulating plant/groundwater/surface water interactions, nutrient dynamics, and potential soil formation is necessary to manage and restore patterned wetlands such as the Everglades. Copyright © 2013 John Wiley & Sons, Ltd.

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“…The formation of calcium carbonate on tree islands may explain some of the difference in hydrologic properties recently discovered between tree islands and the adjacent marsh. Troxler and Childers (2010) and Sullivan (2011) found the K of two natural tree island sediments in the southern Everglades ranged from 1.01 to 43.20 m day À1 , which were one to two orders of magnitude higher than the values that have been found in the Everglades peat marsh (0.54; Harvey et al, 2004). Specific yield values on a natural island were also found to be slightly lower (0.08; Sullivan, 2011) on tree islands compared to marsh values (0.16-0.32; Myers, 1999).…”

Section: Hydrologic Properties: Effects Of Mineral Formationmentioning

confidence: 99%

The role of recharge and evapotranspiration as hydraulic drivers of ion concentrations in shallow groundwater on Everglades tree islands, Florida (USA)

et al. 2012

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Recently, evapotranspiration has been hypothesized to promote the secondary formation of calcium carbonate year‐round on tree islands in the Everglades by influencing groundwater ions concentrations. However, the role of recharge and evapotranspiration as drivers of shallow groundwater ion accumulation has not been investigated. The goal of this study is to develop a hydrologic model that predicts the chloride concentrations of shallow tree island groundwater and to determine the influence of overlying biomass and underlying geologic material on these concentrations. Groundwater and surface water levels and chloride concentrations were monitored on eight constructed tree islands at the Loxahatchee Impoundment Landscape Assessment (LILA) from 2007 to 2010. The tree islands at LILA were constructed predominately of peat, or of peat and limestone, and were planted with saplings of native tree species in 2006 and 2007. The model predicted low shallow groundwater chloride concentrations when inputs of regional groundwater and evapotranspiration‐to‐recharge rates were elevated, while low evapotranspiration‐to‐recharge rates resulted in a substantial increase of the chloride concentrations of the shallow groundwater. Modeling results indicated that evapotranspiration typically exceeded recharge on the older tree islands and those with a limestone lithology, which resulted in greater inputs of regional groundwater. A sensitivity analysis indicated the shallow groundwater chloride concentrations were most sensitive to alterations in specific yield during the wet season and hydraulic conductivity in the dry season. In conclusion, the inputs of rainfall, underlying hydrologic properties of tree islands sediments and forest structure may explain the variation in ion concentration seen across Everglades tree islands. Copyright © 2012 John Wiley & Sons, Ltd.

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Biogeochemical Contributions of Tree Islands to Everglades Wetland Landscape Nitrogen Cycling During Seasonal Inundation

Cited by 13 publications

References 51 publications

Wetlands shrinkage, fragmentation and their links to agriculture in the Muleng–Xingkai Plain, China

Wetlands shrinkage, fragmentation and their links to agriculture in the Muleng–Xingkai Plain, China

The influence of vegetation on the hydrodynamics and geomorphology of a tree island in Everglades National Park (Florida, United States)

The role of recharge and evapotranspiration as hydraulic drivers of ion concentrations in shallow groundwater on Everglades tree islands, Florida (USA)

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