Evidence of Recent Phosphorus Enrichment in Surface Soils of Taylor Slough and Northeast Everglades National Park

Osborne, Todd Z.; Reddy, K. R.; Ellis, Larry R.; Aumen, Nicholas G.; Surratt, Donatto; Zimmerman, Michael S.; Sadle, Jimi

doi:10.1007/s13157-013-0381-5

Cited by 16 publications

(15 citation statements)

References 33 publications

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“…P enrichment is less widespread than N enrichment in natural terrestrial ecosystems (Peñuelas et al., ; Wang et al., ), but P enrichment does nonetheless occur in specific ecosystems, such as wetlands (Osborne et al., ), especially near intensively fertilized agricultural lands or near urban areas (Chen, Yavitt, & Hu, ; Yan et al., ). P fertilization experiments showed increased foliar and root P concentrations, but also higher foliar and root N concentrations.…”

Section: Discussionmentioning

confidence: 99%

Changes in nutrient concentrations of leaves and roots in response to global change factors

Sardans

Grau

Chen

et al. 2017

Global Change Biology

192

114

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Global change impacts on biogeochemical cycles have been widely studied, but our understanding of whether the responses of plant elemental composition to global change drivers differ between above- and belowground plant organs remains incomplete. We conducted a meta-analysis of 201 reports including 1,687 observations of studies that have analyzed simultaneously N and P concentrations changes in leaves and roots in the same plants in response to drought, elevated [CO ], and N and P fertilization around the world, and contrasted the results within those obtained with a general database (838 reports and 14,772 observations) that analyzed the changes in N and P concentrations in leaves and/or roots of plants submitted to the commented global change drivers. At global level, elevated [CO ] decreased N concentrations in leaves and roots and decreased N:P ratio in roots but no in leaves, but was not related to P concentration changes. However, the response differed among vegetation types. In temperate forests, elevated [CO ] was related with lower N concentrations in leaves but not in roots, whereas in crops, the contrary patterns were observed. Elevated [CO ] decreased N concentrations in leaves and roots in tundra plants, whereas not clear relationships were observed in temperate grasslands. However, when elevated [CO ] and N fertilization coincided, leaves had lower N concentrations, whereas root had higher N concentrations suggesting that more nutrients will be allocated to roots to improve uptake of the soil resources not directly provided by the global change drivers. N fertilization and drought increased foliar and root N concentrations while the effects on P concentrations were less clear. The changes in N and P allocation to leaves and root, especially those occurring in opposite direction between them have the capacity to differentially affect above- and belowground ecosystem functions, such as litter mineralization and above- and belowground food webs.

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Section: Discussionmentioning

confidence: 99%

Changes in nutrient concentrations of leaves and roots in response to global change factors

Sardans

Grau

Chen

et al. 2017

Global Change Biology

192

114

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“…Such actions include maintaining the organic soils under saturated conditions to an extent during the year to maintain the organic matter content (approximately 9 months). If drawdown of water levels occurs in the dry season (as it did historically) (Osborne et al 2013a) then P export to downstream areas should be minimal.…”

Section: Phosphorusmentioning

confidence: 99%

“…Nutrient inputs to wetland ecosystems are primarily stored in organic soils, sourced from deposition of organic material from primary productivity fed from enriched inflows or via sequestration in microbial biomass within soils, enhanced by increased nutrient availability (Reddy et al, 1993;Newman et al, 1997). Soils, therefore, are considered to be integrators of long-term water quality conditions (DeBusk et al 1994;Newman et al 1996;Osborne et al 2013a) and so changes to soil properties occur at a much slower rate in relation to the relatively rapid temporal and spatial changes observed in overlying water (Reddy et al, 1999;Stober et al, 2001). When water quality is restored, soils may continue to be a source of nutrients for some time.…”

Section: Introductionmentioning

confidence: 99%

Soil Nutrient Assessment and Characterization in a Degraded Central Florida Swamp

Bukata¹,

Osborne

Szafraniec

2015

Water Air Soil Pollut

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Flatford Swamp, a 2800-acre forested wetland in east Manatee County, Florida, serves as the headwaters of the Myakka River. Over the last two decades, Flatford swamp has experienced significant tree mortality. The cause of this mortality, as well as dramatic encroachment of several invasive herbaceous and shrub species, is thought to be linked to hydrologic alterations that resulted in increased inundation during the wet and dry seasons. A biogeochemical characterization of wetland soils was conducted to (1) establish a baseline spatial distribution of soil P and N in Flatford Swamp, (2) determine if soil biogeochemistry could be related to tree mortality, and (3) determine if soil biogeochemical conditions may affect future restoration efforts. Mean total nitrogen and total carbon in sampled soils ranged from 13.8 to 24.9 mg kg −1 and 211 to 468 mg kg −1 , respectively, indicating that soils are predominantly organic. Environmental conditions suggest that the nitrate-reduction process occurs readily in Flatford Swamp, and thus N abatement will continue naturally during restoration. Soil total phosphorus content is significantly higher than expected and is likely one of several contributing factors that led to observed changes in vegetation community structure. Levels of total sulfur, total calcium, and conductivity, indicative of agricultural use of groundwater for irrigation, suggest sulfide toxicity as a plausible contributing mechanism in the observed dieback of Nyssa sylvatica var. biflora.

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“…Employing a combination of sampling designs is critical for determining ecosystem effects of varying drivers at both large and small temporal and spatial scales. For example, data from repeated, randomized sampling at the landscape scale have shown widespread ecosystem-scale responses to hydrologic management (i.e., Sargeant et al 2011;Lee et al 2013), while collections along water flow transects have revealed impacts related to elevated nutrient concentrations at inflow structures (e.g., Gaiser et al 2014;Osborne et al 2014;Sah et al 2014). Spatial designs, including reference areas in Before-After Control-Intervention (BACI) approaches, such as employed by the FCE LTER program (at a large scale, Childers 2006), may be required to determine both patterns and causes of long-term change.…”

Section: Tools For Quantifying Restoration Progressmentioning

confidence: 99%

“…Biogeochemical Changes To determine trends in nutrient accumulation in soils along the ENP boundaries, Osborne et al (2014) sampled along transects downstream of three of the canal water inputs to Shark and Taylor Sloughs. They found elevated total phosphorus (TP) concentrations in soils near inflows, particularly in Taylor Slough, frequently exceeded the 500 mg kg −1 threshold that is indicative of P enrichment in the Everglades.…”

mentioning

confidence: 99%

Wetland Ecosystem Response to Hydrologic Restoration and Management: The Everglades and its Urban-Agricultural Boundary (FL, USA)

et al. 2014

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Wetland restoration success depends on understanding ecohydrological complexities in addition to the historical extent and legacies of past modifications. Restoration effectiveness in the Florida Everglades has been studied for several decades. We focused this special issue on the effects of hydrologic restoration in the southeastern Everglades, as this region provides a model for understanding wetland and estuarine response to management and restoration along an urban-agricultural-wetland boundary. We synthesize several decades of interdisciplinary wetland ecosystem restoration studies examining the influence of hydrologic and biogeochemical changes on spatial and temporal patterns of ecosystem structure and function. Our goal is to improve restoration effectiveness by revealing connections between water management activities and ecosystem changes. Synthesis of these long-term data suggests restoration success is contingent on quantifying the influences hydrologic restoration on landscape connectivity within and outside of the Everglades boundaries, in addition to its interactions with organisms and their complex food webs. Rehabilitating habitat structure and connectivity in the southeastern Everglades can be accomplished through increasing delivery of clean freshwater to its primary flow-way, Taylor Slough. This compendium indicates that reversal of water quality impacts of rehydration is possible given timely and informed approaches that improve the flow clean freshwater to the Everglades.

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Evidence of Recent Phosphorus Enrichment in Surface Soils of Taylor Slough and Northeast Everglades National Park

Cited by 16 publications

References 33 publications

Changes in nutrient concentrations of leaves and roots in response to global change factors

Changes in nutrient concentrations of leaves and roots in response to global change factors

Soil Nutrient Assessment and Characterization in a Degraded Central Florida Swamp

Wetland Ecosystem Response to Hydrologic Restoration and Management: The Everglades and its Urban-Agricultural Boundary (FL, USA)

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