Seagrass-Eutrophication Interactions:
Role of Spatial Pattern
Underwater grasses provide critical habitat for young fish and crabs and play important roles in a host of other ecological processes in the Chesapeake Bay. Over the past 20 years the Bay system has experienced a widespread loss of these essential habitats. Research has shown that the losses have occurred largely because of heavy nutrient loading, which has stimulated the over-growth of single-celled plants in the water column (phytoplankton) and epiphytic algae that attach themselves to seagrass leaves. The result – a diminishment of light that grasses need for photosynthesis – has meant large die-offs in many areas of the Bay. A major goal of the Chesapeake Bay Program's commitment for reducing nutrients is aimed at restoring grasses, both through natural reproduction and targeted plantings. Just how well grasses are likely to respond, however, is uncertain. Preliminary research suggests that their survival may be related to size of plots and density of plants, important factors for reducing local nutrient concentrations and outcompeting the growth of epiphytic algae on grass leaves. In this project, Michael Kemp and Laura Murray will conduct field experiments designed to compare the effects of plot size and abundance on nutrient and plant interactions. Based on their findings, they will develop simulation models for identifying criteria essential for successful seagrass restoration. Using this information, they will collaborate with current education programs in middle and secondary schools engaged in transplanting seagrasses. In learning about the Bay ecosystem through hands-on involvement, students will gain an appreciation of how scientific research can have practical applications meaningful for important local environments
|
W. Michael Kemp
Laura Murray
Horn Point Laboratory
University of Maryland Center for Environmental Science
|
|
|
