Integration of an Individual-Based Fish Bioenergetics Model Into a Spatially Explicit Water Quality Model (CE-QUAL-ICM). PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
This technical note presents the results of incorporating a fish bioenergetics module into CE-QUAL-ICM, a spatially explicit eutrophication model. In addition to fish consumption of algae, zooplankton, and detritus, fish biomass accumulation and recycling to the water column are explicitly accounted for. Schools of fish are tracked individually, allowing for spatial resolution of their effects on phytoplankton and nutrient loading. These developments allow for investigations of the impact of planktivorous fish on water quality through consumption of algae and nutrient export via mass sequestering during growth. The formulation details of the new model system are outlined in this technical note.
Author: Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
This technical note presents the results of incorporating a fish bioenergetics module into CE-QUAL-ICM, a spatially explicit eutrophication model. In addition to fish consumption of algae, zooplankton, and detritus, fish biomass accumulation and recycling to the water column are explicitly accounted for. Schools of fish are tracked individually, allowing for spatial resolution of their effects on phytoplankton and nutrient loading. These developments allow for investigations of the impact of planktivorous fish on water quality through consumption of algae and nutrient export via mass sequestering during growth. The formulation details of the new model system are outlined in this technical note.
Author: Vanessa I. Wells Publisher: ISBN: Category : Fishes Languages : en Pages : 139
Book Description
Many communities are currently seeking to balance urban water needs with preservation of sensitive fish habitat. As part of that effort, CE-QUAL-W2, a hydrodynamic and temperature model, was developed for Chester Morse Lake and the lower Cedar River, WA. Chester Morse Lake is approximately 10 km long with a maximum depth at full pool of 40 m. The Cedar River model started immediately downstream of the Chester Morse dam and ended 21 km downstream at Landsburg, where drinking water is diverted for the City of Seattle. This water quality model was coupled with a fish habitat and bioenergetics model for bull trout and was calibrated to temperature data between 2005 and 2008. Bull trout fish bioenergetics parameters were provided by the USGS. The CE-QUAL-W2 model was found to be highly accurate in modeling temperature variation in the lake - at most locations having an average absolute mean error of between 0.5 and 0.8°C. The Cedar River model had an average absolute mean error of 0.7°C. This tool is designed to allow managers and operators to estimate the impact to fish habitat and growth potential from various management decisions including extent of drawdown, timing/volume of flows, and various pumping operations. Future studies could include incorporating further water quality parameters such as nutrients, algae, and zooplankton as they relate to fish productivity.
Author: Dorothy Hamlin Tillman Publisher: ISBN: Category : Languages : en Pages :
Book Description
In recent years new ideas for nutrient management to control eutrophication in estuarine environments have been under consideration. One popular approach being considered in the Chesapeake Bay Program is called the "top down" approach based on the premise that restoring algal predators, such as oysters and menhaden, will limit excess phytoplankton production and possibly eliminate costly nutrient control programs. The approach is being considered to replace or use in conjunction with the "bottom up" approach of reducing nutrient loads. The ability to model higher trophic levels such as fish, as well as the eutrophication processes driving production of primary producers in an aquatic ecosystem is needed. CE-QUAL-ICM (ICM) and Ecopath were two models selected for this research. ICM is a time- and spatial-varying eutrophication model that uses nutrient loads to predict primary producers, while Ecopath is a static mass balance model representing an average time period (e.g., season or year) and uses values of primary producers and other groups to predict fish biomass. Linking the two models will provide the means of going up the food chain by trophic levels. The Chesapeake Bay was chosen as the study site since both models are in use there. Before coupling ICM and Ecopath, common links between the two models were found. Ten groups were identified with such variables as production rates, consumption rates, and unassimilated food/consumption. A post-processor/subroutine was developed for ICM to aggregate output data from 3-D to 0-D to be used in Ecopath. Two Ecopath runs were developed with data from ICM and the Chesapeake Bay (CB) Ecopath model to see how network interactions differed with data representing the same system. Four additional runs were made, creating perturbations (i.e., increased phytoplankton production) using the CB Ecopath model and replacing the primary producers with data from ICM. Final runs of ICM were conducted looking at adjusting three parameters to try to restore the Bay back to 1950 conditions. It was demonstrated that ICM data can be coupled with Ecopath to study management strategies in eutrophication. Because of model formulations there was no data exchange from Ecopath back to ICM.
Author: Amy Catherine Marcinkevage Miller Publisher: ProQuest ISBN: 9780549337492 Category : Languages : en Pages : 562
Book Description
This research focuses on the development and use of a spatially-explicit individual-based model (IBM) in evaluating the long-term hydrologic effect of landscape change and management on aquatic communities. The model simulates the behavior of individual fish in their habitat selection process to analyze network dynamics in stream ecosystems in response to outside driving influences. The primary input to this model is streamflow and hydrologic connectivity related to watershed landscape characteristics.
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Author: P. Soupy Dalyander
Author: Vanessa I. Wells
Author: Michael Lee McKillip
Author: Dorothy Hamlin Tillman
Author: Sung-Chan Kim
Author: C. F. Cerco
Author: Amy Catherine Marcinkevage Miller
Author: Patrick N. Deliman
Author: Carl F. Cerco