Soil Phosphorus and Vegetation Influence on Wetland Phosphorus Release after Simulated Drought

Bostic, E. M.; White, John R.

doi:10.2136/sssaj2006.0137

Cited by 67 publications

(53 citation statements)

References 43 publications

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“…TP in peat-burned areas was 47%, 136%, 687% and 36% significantly higher than that in surface-burned areas, respectively. Bostic and White (2007) indicated that phosphorus enrichment of marsh soils can act as an internal source of nutrients to the water column and drive existing wetland eutrophic conditions. Steward and Ornes (1975) found a strong nutrient relationship in sawgrass re-growth after fire which differed considerably from sawgrass in non-burned areas.…”

Section: Discussionmentioning

confidence: 99%

Impacts of fire and phosphorus on sawgrass and cattails in an altered landscape of the Florida Everglades

Wu¹,

Rutchey

Newman

et al. 2012

Ecol Process

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Introduction: Although fire as a critical ecological process shapes the Florida Everglades landscape, researchers lack landscape-based approach for fire management. The interactive effect of fire, nutrients, water depth, and invasive cattails (Typha spp.) on vegetation communities is of special concern for ecosystem restoration. In particular, questions concerning the effect of fire on nutrient release and, by extension, the potential thereof to stimulate sawgrass (Cladium jamaicense Crantz) re-growth and cattail expansion under varying hydrological conditions are of immediate relevance to ecologists and land managers who work to restore the Everglades. Methods: In late April of 1999, a 42,875 ha surface fire, including a 100 ha peat fire, burned the northern section of Water Conservation Area 3A (WCA-3A) in the Everglades. In this study, total phosphorus (TP) in soil, surface water, pore-water, and vegetation was sampled at non-burned, surface-burned and peat-burned areas within one and five months after the burn. Four years after the initial fire, field data were collected in a large scale survey to analyze how the 1999 fire affected cattail distribution in the altered landscape of high soil TP and cattail habitats. Existing GIS maps were utilized to select field sampling locations and to provide additional information for the analysis.

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Section: Discussionmentioning

confidence: 99%

Impacts of fire and phosphorus on sawgrass and cattails in an altered landscape of the Florida Everglades

Wu¹,

Rutchey

Newman

et al. 2012

Ecol Process

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“…The opposing trends observed in the spatial distributions of N and P within the tree islands resulted in a strong gradient in soil N:P ratios from head to tail of the TI's. Given the high rainfall in the Everglades area (German, 2000), the elevated topography of the TI's, the low P concentration in the slough, and an Everglades-wide geochemistry that favours P remobilization from P enriched to P unenriched areas (Bostic & White, 2007;Bostic et al, 2010) a strong mechanism of phosphorus retention must be in place for such a strong concentration gradient to be maintained between hammock, surrounding swamp forest, and adjacent marsh. The ability of wetland soil to retain P depends on the physico-chemical characteristics of the sediment and overlying water.…”

Section: Nutrient Statusmentioning

confidence: 99%

Pattern of nutrient availability and plant community assemblage in Everglades Tree Islands, Florida, USA

2011

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We address the relative importance of nutrient availability in relation to other physical and biological factors in determining plant community assemblages around Everglades Tree Islands (Everglades National Park, Florida, USA). We carried out a one-time survey of elevation, soil, water level and vegetation structure and composition at 138 plots located along transects in three tree islands in the Park's major drainage basin. We used an RDA variance partitioning technique to assess the relative importance of nutrient availability (soil N and P) and other factors in explaining herb and tree assemblages of tree island tail and surrounded marshes. The upland areas of the tree islands accumulate P and show low N concentration, producing a strong islandwide gradient in soil N:P ratio. While soil N:P ratio plays a significant role in determining herb layer and tree layer community assemblage in tree island tails, nevertheless part of its variance is shared with hydrology. The total species variance explained by the predictors is very low. We define a strong gradient in nutrient availability (soil N:P ratio) closely related to hydrology. Hydrology and nutrient availability are both factors influencing community assemblages around tree islands, nevertheless both seem to be acting together and in a complex mechanism. Future research should be focused on segregating these two factors in order to determine whether nutrient leaching from tree islands is a factor determining community assemblages and local landscape pattern in the Everglades, and how this process might be affected by water management.

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“…In addition, in wetlands that are unsaturated during drawdown events, soil oxidation is increased and reflooding may subsequently mobilize P (Bostic and White 2006). Episodic drops in water levels can increase organic matter decomposition, potentially increasing P loading to the water column on reflooding (Watts 2000;DeBusk and Reddy 2003).…”

Section: Background and Motivationmentioning

confidence: 99%

Phosphorus Mass Balance and Internal Load in an Impacted Subtropical Isolated Wetland

Bhadha

Jawitz

Min

2010

Water Air Soil Pollut

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Internal loading is a critical component of the phosphorus (P) budget of aquatic systems that can control trophic conditions. While diffusion across the soil-water interface is generally considered the dominant process controlling P load to the water column, advection due to water table fluctuations can also be significant. Our objective was to evaluate the role of diffusive and advective fluxes in relation to the total P (TP) loads entering and exiting an impacted wetland in the Lake Okeechobee drainage basin. The average diffusive flux of TP was 0.32±0.14 mgm −2 day −1 and occurred for 240 days out of 314, while advective flux was 1.31± 4.03 mgm −2 day −1 and occurred for only 57 days. Phosphorus load to the wetland via internal modes was estimated to be 2.3 and 4.0 gday −1 from diffusion and advection respectively, accounting for 18% of the total P input, while overland flow (51%) was the major input pathway to the wetland. Ditch flow and groundwater outflow accounted for 49% (18.0 gday −1 ) and 14% (5.0 g day −1 ) of the total P output, respectively. This study shows the importance of advective flux in addition to diffusive flux and that the former should not be neglected when estimating internal P load of transiently flooded isolated wetlands. The monthly P budget-based retention and release patterns were consistent with previous findings, showing that intermittent flooding and drying cycling significantly reduces the P retention capacity of a wetland.

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Soil Phosphorus and Vegetation Influence on Wetland Phosphorus Release after Simulated Drought

Cited by 67 publications

References 43 publications

Impacts of fire and phosphorus on sawgrass and cattails in an altered landscape of the Florida Everglades

Impacts of fire and phosphorus on sawgrass and cattails in an altered landscape of the Florida Everglades

Pattern of nutrient availability and plant community assemblage in Everglades Tree Islands, Florida, USA

Phosphorus Mass Balance and Internal Load in an Impacted Subtropical Isolated Wetland

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