A5085768615- Coastal wetland ecosystem dynamics
- Aquatic Ecosystems and Phytoplankton Dynamics
- Coastal and Marine Dynamics
- Peatlands and Wetlands Ecology
- Soil and Water Nutrient Dynamics
- Geology and Paleoclimatology Research
- Mercury impact and mitigation studies
- Constructed Wetlands for Wastewater Treatment
- Hydrology and Sediment Transport Processes
- Geological formations and processes
- Heavy metals in environment
- Ecology and Vegetation Dynamics Studies
- Soil erosion and sediment transport
- Plant responses to water stress
- Aeolian processes and effects
- Heavy Metal Exposure and Toxicity
- Isotope Analysis in Ecology
- Hydrology and Watershed Management Studies
- Algal biology and biofuel production
- Marine and coastal plant biology
- Rangeland and Wildlife Management
- Soil Carbon and Nitrogen Dynamics
- Fish Ecology and Management Studies
- Groundwater and Isotope Geochemistry
- Marine and coastal ecosystems
Florida International University
2014-2024
University of Miami
2024
South Eastern Regional College
2013
Environmental Protection Agency
2008-2009
University of Florida
1995
We examined periphyton along transects in five Everglades marshes and related compositional functional aspects to phosphorus (P) gradients caused by enriched inflows. Results were compared those of a P‐addition experiment pristine marsh. While the water total P (TP) concentration was not load or experiment, TP strongly correlated with distance from source. Increased associated loss biomass, particularly calcifying mat‐forming matrix, regardless growth form (epiphytic, floating, epilithic)....
ABSTRACT Wetlands respond to nutrient enrichment with characteristic increases in soil nutrients and shifts plant community composition. These responses eutrophication tend be more rapid longer lasting oligotrophic systems. In this study, we documented changes associated water quality from 1989 1999 Everglades wetlands. We accomplished by resampling soils macrophytes along four transects that were originally sampled 1989. addition documenting phosphorus (P) levels decadal species composition...
ABSTRACT Few studies have examined long‐term ecological effects of sustained low‐level nutrient enhancement on wetland biota. To determine phosphorus (P) addition Everglades marshes we added P at low levels (5, 15, and 30 μg L −1 above ambient) for 5 yr to triplicate 100‐m flow‐through channels in pristine marsh. A cascade responses occurred similar sequence among treatments. Although the rate change increased with dosing level, treatments converged enriched endpoints, characterized most...
Photodegradation is the major pathway of methylmercury (MeHg) degradation in many surface waters. However, mechanism MeHg photodegradation still not completely understood. Dissolved organic matter (DOM) expected to play a critical role photodegradation. By using several techniques, including N2/O2 purging and addition stable isotope (Me(201)Hg), scavengers, competing ligands, singlet oxygen ((1)O2) generator, played by MeHg-DOM complexation Everglades water was investigated. DOM appeared be...
Summary 1. Our goal was to quantify short‐term phosphorus (P) partitioning and identify the ecosystem components important P cycling in wetland ecosystems. To do this, we added radiotracer oligotrophic, P‐limited Everglades marshes. 32 PO 4 water column six 1‐m 2 enclosed mesocosms located long‐hydroperiod marshes of Shark River Slough, National Park. Ecosystem were then repeatedly sampled over 18 days. 2. Water particulates (>0.45 μ m) incorporated within first minute after dosing stored...
The size and distribution of Phytoplankton populations are indicators the ecological status a water body. chlorophyll-a (Chl-a) concentration is estimated as proxy for phytoplankton biomass. Remote sensing only practical method synoptic assessment Chl-a at large spatial temporal scales. Long-term records ocean color data from MODIS Aqua Sensor have proven inadequate to assess due lack robust algorithm. estimation in shallow coastal bodies has been challenge existing operational algorithms...
Cyanobacteria, an important addition to biofertilizers, are gaining popularity for their multifaceted benefits in sustainable agriculture and ecosystem restoration. However, harmful algal blooms (HABs) freshwater, predominantly caused by cyanobacteria, prevent sunlight penetration into the water develop hypoxic anoxic conditions. We collected cyanobacteria slurry from Lake Jesup (Central Florida, USA), repurposed it as a biofertilizer, incorporated typical South Florida calcite soil...
We estimated the mass budget for mercury (Hg) seasonally deposited into Florida Everglades and investigated seasonality of Hg cycling by analyzing data obtained water, soil, flocculent detrital material (floc), periphyton, mosquitofish collected throughout freshwater marshes in 2005 dry wet seasons. Higher season total (THg) floc, periphyton agreed with greater amounts entering these compartments during season, probably owing to substantially deposition than season. Seasonal differences were...
Recently, evapotranspiration has been hypothesized to promote the secondary formation of calcium carbonate year-round on tree islands in Everglades by influencing groundwater ions concentrations. However, role recharge and as drivers shallow ion accumulation not investigated. The goal this study is develop a hydrologic model that predicts chloride concentrations island determine influence overlying biomass underlying geologic material these Groundwater surface water levels were monitored...
Spatial patterns in mercury cycling and bioaccumulation at the landscape level Everglades were investigated by collecting analyzing multimedia samples for species biogeochemical characteristics from 228 randomly located stations. Higher total (THg) environmental compartments (surface water, soil, flocculent detrital material (floc), periphyton) generally occurred northern central Everglades, but higher THg water periphyton National Park was an exception. Multiple characteristics, such as...
The primary goal of this review and synthesis effort is to summarize present landscape patterns key soil constituents such as carbon (C), phosphorus (P), sulfur (S), mercury (Hg), all which are historical interest with respect Everglades restoration. A secondary highlight the importance scale monitoring assessment soils in Protection Area (EPA) future restoration efforts. Review information derived from two independent studies revealed significant thickness, organic matter, P EPA. Two...
Abstract Questions: How are the early survival and growth of seedlings Everglades tree species planted in an experimental setting on artificial islands affected by hydrology substrate type? What implications these responses for broader island restoration efforts? Location: Loxahatchee Impoundment Landscape Assessment (LILA), Boynton Beach, Florida, USA. Methods: An experiment was designed to test hydrological effects seedling survivorship. Two – a peat limestone‐core representing two major...