2002 Progress Report: Effects of Anthropogenic Eutrophication on the Magnitude and Trophic Fate of Microphytobenthic Production in EstuariesEPA Grant Number: R827072C021
Subproject: this is subproject number 021 , established and managed by the Center Director under grant R827072
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: Alabama Center For Estuarine Studies (ACES)
Center Director: Shipp, Robert L.
Title: Effects of Anthropogenic Eutrophication on the Magnitude and Trophic Fate of Microphytobenthic Production in Estuaries
Investigators: Cebrian, Just , Pennock, Jonathan R.
Institution: University of South Alabama
EPA Project Officer: Packard, Benjamin H
Project Period: July 1, 2000 through June 30, 2001 (Extended to September 30, 2003)
Project Period Covered by this Report: July 1, 2001 through June 30, 2002
RFA: Alabama Center For Estuarine Studies (ACES) (1999) RFA Text | Recipients Lists
Research Category: Targeted Research
The objectives of this research project are to: (1) describe the importance of grazing by macro-herbivores (i.e., excluded by mesh less than 1 mm2), resuspension, and subsequent transportation on the water column as routes followed by microphytobenthic production (this is important in understanding the role of microphytobenthic populations as food resources for resident and exogenous macro-herbivores, through transportation by waves, currents, and consumers); and (2) evaluate how sediment fertilization, one of the most important consequences of anthropogenic eutrophication of coastal systems, affects those routes of microphytobenthic production. This second objective will contribute to our knowledge of how increasing human-induced nutrient delivery into coastal systems alters the ecological role of microphytobenthic communities.
We started the project several months later than initially planned, but the work is now proceeding to our satisfaction and is about 60 percent complete. We now are confident, based on preliminary results and a number of modifications, that our approach is sound and our experimental design and techniques are appropriate. We also have chosen to implement a number of new activities that were not included in the initial proposal. First, concomitantly with the grazing/resuspension experiments described in the proposal, we are doing a series of experiments to test the effects of the interaction between sediment fertilization and water column shading, two of the most important consequences of anthropogenic eutrophication on microphytobenthos dynamics. Second, we are working on the validation of a spectrophotometric method to measure metabolical rates of microphytobenthic communities.
We are pleased with the results, which already unveil interesting patterns on the effects of anthropogenic eutrophication on microphytobenthos dynamics. At this point, we have sampled several seasons through Year 1 of the project. We have requested and been granted a no-cost extension and, using matching funds from other ongoing projects in the Principal Investigator's laboratory, we plan to continue our seasonal experiments until fall 2003. The work will generate one Masters thesis and two publications. It also will represent important complementary information for other current studies on microphytobenthos in the Principal Investigator's laboratory (see http://ecosystemslab.disl.org Exit ).
Future activities are to continue our sampling until fall 2003. During Year 2 of the project, one Masters thesis based on this work will be defended and the resulting scientific papers (we anticipate that there will be two) will be submitted. In the meantime, we plan to give several presentations about the work at scientific meetings (such as the 2003 Estuarine Research Foundation, the 2004 American Society of Limnology and Oceanography, and the 2004 Benthic Ecology Meetings).
Journal Articles:No journal articles submitted with this report: View all 1 publications for this subproject
Supplemental Keywords:microphytobenthos, spectrophotometric, herbivory, export, import, eutrophication, macro-herbivores, anthropogenic eutrophication, grazing/resuspension experiments, ecosystem, ecosystem protection, ecology, ecological effects, ecological indicators, environmental exposure, geographic area, water, water use, aquatic ecosystem, coastal ecosystem, coastal environments, estuary, estuaries, estuarine research, estuarine waters, environmental chemistry, chemistry, chemical engineering, risk, assessment, indicators, human health, Alabama, AL, human modifications, fishery sampling., RFA, Scientific Discipline, Geographic Area, ECOSYSTEMS, Water, Ecosystem Protection/Environmental Exposure & Risk, Chemical Engineering, Aquatic Ecosystems & Estuarine Research, estuarine research, Environmental Chemistry, Ecosystem/Assessment/Indicators, Ecosystem Protection, State, Chemistry, Restoration, Aquatic Ecosystem, Ecological Effects - Environmental Exposure & Risk, Aquatic Ecosystems, Terrestrial Ecosystems, Ecology and Ecosystems, Aquatic Ecosystem Restoration, Ecological Indicators, coastal ecosystem, eutrophication, estuaries, watersheds, nutrient loading, tropical ecosystems, Alabama (AL), microphytobenthic production, coastal environments, anthropogenic impact, ecosystem, water quality, estuarine waters, human modifications
Progress and Final Reports:Original Abstract
Main Center Abstract and Reports:R827072 Alabama Center For Estuarine Studies (ACES)
Subprojects under this Center: (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R827072C001 Fluorescent Whitening Agents As Facile Pollution Markers In Shellfishing Waters
R827072C002 Red Snapper Demographics on Artificial Reefs: The Effect of Nearest-Neighbor Dynamics
R827072C003 Stabilization of Eroding Shorelines in Estuarine Wave Eliminates with Constructed Fringe Wetlands Incorporating Offshore Breakwaters
R827072C004 Interaction Between Water Column Structure and Reproduction in Jellyfish Populations Of Mobile Bay (SGER)
R827072C005 Effects of Variation in River Discharge and Wind-Driven Resuspension on Higher Trophic Levels in the Mobile Bay Ecosystem
R827072C006 Results of Zooplankton Component
R827072C007 Benthic Study Component
R827072C008 A Preliminary Survey of Macroalgal and Aquatic Plant Distribution in the Mobile Tensaw Delta
R827072C009 Fisheries-induced changes in the structure and function of shallow water "nursery habitats": an experimental assessment
R827072C010 Effects Of Variation in River Discharge and Wind-Driven Resuspension on Lower Trophic Levels of the Mobile Bay Ecosystem
R827072C011 Evaluation of Alabama Estuaries as Developmental Habitat for Juvenile Sea Turtles
R827072C012 Effects of Salinity Stress on Natural and Anthropogenically-Derived Bacteria in Estuarine Environments
R827072C013 The Role of Land-Use/Land-Cover and Sub-estuarine Ecosystem Nitrogen Cycling in the Regulation of Nitrogen Delivery to a River Dominated Estuary; Mobile Bay, Alabama
R827072C014 Environmental Attitudes of Alabama Coastal Residents: Public Opinion Polls and Environmental Policy
R827072C015 Synthesis and Characterization of an Electrochemical Peptide Nucleic Acid Probe
R827072C016 Determinants of Small-Scale Variation in the Abundance of the Blue Crab Callinectes Sapidus
R827072C017 Effects of Estrogen Pollution on the Reproductive Fitness of the Gulf Pipefish, Syngnathus scovelli
R827072C019 A Model for Genetic Diversity Aquatic Insects of the Mobile/Tensaw River Delta
R827072C020 Evaluating Trophic Processes as Indicators of Anthropogenic Eutrophication in Coastal Ecosystems: An Exploratory Analysis
R827072C021 Effects of Anthropogenic Eutrophication on the Magnitude and Trophic Fate of Microphytobenthic Production in Estuaries
R827072C022 Characteristics of Ship Waves and Wind Waves in Mobile Bay
R827072C023 Methods Comparison Between Stripping Voltammetry and Plasma Emission Spectroscopy for Metals in Mobile Bay
R827072C024 Changes in Water Conditions and Sedimentation Rates Associated With Construction of the Mobile Bay Causeway
R827072C025 Cold-Induced Hibernation of Marine Vibrios in the Gulf of Mexico: A Study of Cell-Cell Communication and Dormancy in Vibrio vulnificus
R827072C026 Holocene Sedimentary History of Weeks Bay, AL: Human and Natural Impacts on Deposition in a Gulf Coast Estuary
R827072C027 Shelter Bottlenecks and Self-Regulation in Blue Crab Populations: Assessing the Roles of Nursery Habitats and Juvenile Interactions for Shelter Dependent Organisms
R827072C028 Predicting Seagrass Survival in Nutrient Enriched Waters: Toward a New View of an Existing Paradigm
R827072C029 DMSP and its Role as an Antioxidant in the Salt Marsh Macrophyte Spartina alterniflora
R827072C030 A Preliminary Survey of Aerial and Ground-Dwelling Insects of the Mobile/Tensaw Delta
R827072C031 Natural Biogeochemical Tags of Striped Mullet, Mugil cephalus, Estuarine Nursery Areas in the North Central Gulf of Mexico
R827072C032 Resolution of Sedimentation Rates in Impacted Coastal Environments Using 137Cs and 210Pb Markers: Dog River and Fowl River Embayments
R827072C033 Investigation of the Use of Pulse Amplitude Modulated (PAM) Fluorometry as an Indicator of Submerged Aquatic Vegetation Health in Mobile Bay
R827072C034 Influence of Invasive Plant Species in Determining Diversity of Aquatic Vegetation in the Mobile-Tensaw Delta
R827072C035 The Influence of Shallow Water Hydrodynamics on the Importance of Seagrass Detritus in Estuarine Food Webs
R827072C036 Food Web Interactions, Spatial Subsidies and the Flow of Energy Between the Mobile Bay Delta and Offshore Waters: A SGER Proposal to the Alabama Center for Estuarine Studies
R830651C001 Meteorological Modeling of Hurricanes and Coastal Interactions: A Stability Study For Vertical Pressure Levels
R830651C002 Characterization of Glycoprotein Cues Used by the Parasitic Rhizocephalan Barnacle Loxothylacus texanus To Identify Its Blue Crab Host, Callinectes sapidus
R830651C003 Survey of Diamondback Terrapin Populations in Alabama Estuaries
R830651C004 An Assessment of Environmental Contaminant Levels in Water and Dragonfly Larvae Tissues from the Mobile/Tensaw Delta