A bio-physical coastal ecosystem model for assessing environmental effects of marine bivalve aquaculture

Abstract A simple lower trophic level, bio-physical marine ecosystem model is developed for the purpose of assessing the environmental effects of bivalve aquaculture in coastal embayments. The ecosystem box model includes pelagic and benthic components and describes the cycling of a most-limiting nutrient. The pelagic compartment is comprised of phytoplankton, zooplankton, nutrients and detritus. These populations interact following predator–prey dynamics and biogeochemical processes. Mixing processes within the bay, and exchange of waters with the adjacent open ocean, are included. The pelagic ecosystem is coupled to a simple benthos containing a dynamically active organic matter pool. Benthic–pelagic coupling includes episodic resuspension, remineralization, sinking, and permanent burial. A population of grazing bivalves is superimposed on this system as a diagnostic variable. The model is applied to a coastal bay and used to determine how bivalve populations affect nutrient cycling in the ecosystem. This is done by examining changes in the standing stock of the various populations, as well as associated nutrient (mass) fluxes, for cases both with and without intensive bivalve culture. It was demonstrated that bivalves divert production from the pelagic to benthic food webs. Phytoplankton and detritus are depleted from the water by bivalve filter feeding and biodeposited to the benthos as fecal matter. This organic loading causes order of magnitude changes in the benthic detrital pool and the associated benthic–pelagic fluxes. It was also shown that water motion and mixing is important in structuring the ecological dynamics in the bay. To faciliate future applications and observational studies, a retrospective analysis of parameter identifiability and uncertainty was also undertaken.

[1]  Robert A. Berner,et al.  An idealized model of dissolved sulfate distribution in recent sediments , 1964 .

[2]  H. Ducklow,et al.  A nitrogen-based model of plankton dynamics in the oceanic mixed layer , 1990 .

[3]  Richard C. Dugdale,et al.  NUTRIENT LIMITATION IN THE SEA: DYNAMICS, IDENTIFICATION, AND SIGNIFICANCE1 , 1967 .

[4]  Trevor Platt,et al.  Photoinhibition of photosynthesis in natural assemblages of marine phytoplankton , 1980 .

[5]  Lewi Stone,et al.  Ecosystem Resilience, Stability, and Productivity: Seeking a Relationship , 1996, The American Naturalist.

[6]  H. Takeoka.  Fundamental concepts of exchange and transport time scales in a coastal sea , 1984 .

[7]  C. Hily.  Is the activity of benthic suspension feeders a factor controlling water quality in the Bay of Brest , 1991 .

[8]  Jon Grant,et al.  Mathematical modelling to assess the carrying capacity for multi-species culture within coastal waters , 2003 .

[9]  Michael Dowd,et al.  Probabilistic characterization of tidal mixing in a coastal embayment: a Markov Chain approach , 2002 .

[10]  S. Marsili-Libelli,et al.  Confidence regions of estimated parameters for ecological systems , 2003 .

[11]  C. S. Holling.  The components of prédation as revealed by a study of small-mammal prédation of the European pine sawfly. , 1959 .

[12]  A. Jassby,et al.  THE RELATIONSHIP BETWEEN PHOTOSYNTHESIS AND LIGHT FOR NATURAL ASSEMBLAGES OF COASTAL MARINE PHYTOPLANKTON 1 , 1976 .

[13]  Jon Grant,et al.  Effects of suspended mussel culture (Mytilus spp.) on sedimentation, benthic respiration and sediment nutrient dynamics in a coastal bay , 1994 .

[14]  M. Kishi,et al.  Numerical simulation model for quantitative management of aquaculture , 1994 .

[15]  James N. Kremer,et al.  A coastal marine ecosystem : simulation and analysis , 1978 .

[16]  Timothy R. Parsons,et al.  Biological Oceanographic Processes , 1973 .

[17]  J. Widdows,et al.  Use of annular flumes to determine the influence of current velocity and bivalves on material flux at the sediment-water interface , 1998 .

[18]  A. Ménesguen,et al.  Pelagic and benthic trophic chain coupling in a semi-enclosed coastal system, the Bay of Brest (France): a modelling approach , 1999 .

[19]  Karline Soetaert,et al.  On the coupling of benthic and pelagic biogeochemical models , 2000 .

[20]  M. N. Hill,et al.  The sea: ideas and observations on progress in the study of the seas , 1963 .

[21]  S. D. Cooper,et al.  PRIMARY-PRODUCTIVITY GRADIENTS AND SHORT-TERM POPULATION DYNAMICS IN OPEN SYSTEMS , 1997 .

[22]  Danielle J. Marceau,et al.  Modeling complex ecological systems: an introduction , 2002 .

[23]  Donald L. DeAngelis,et al.  The global carbon cycle. , 1990 .

[24]  John Caperon,et al.  Population Growth in Micro-Organisms Limited by Food Supply. , 1967, Ecology.

[25]  N. Draper,et al.  Applied Regression Analysis , 1967 .

[26]  E. Henderson,et al.  The dynamics of nutrient regeneration and simulation studies of the nutrient cycle , 1987 .

[27]  J. Vallino.  Improving marine ecosystem models: Use of data assimilation and mesocosm experiments , 2000 .

[28]  James E. Cloern,et al.  Does the benthos control phytoplankton biomass in South San Francisco Bay , 1982 .

[29]  K. Edelvang,et al.  Modelling of Suspended Matter Transport from the Oder River , 2002 .

[30]  Glenn R. Flierl,et al.  Behavior of a simple plankton model with food-level acclimation by herbivores , 1986 .

[31]  M. Fasham,et al.  Modelling the Marine Biota , 1993 .

[32]  C. McKenzie,et al.  Assessment of the Particulate Food Supply Available for Mussel (Mytilus spp.) Farming in a Semi-enclosed, Northern Inlet , 2001 .

[33]  The stability of an NPZ model subject to realistic levels of vertical mixing , 2000 .

[34]  E. Stewart,et al.  Ingestion by planktonic grazers as a function of concentration of food1 , 1975 .

[35]  Douglas M. Hawkins,et al.  Plackett–Burman technique for sensitivity analysis of many-parametered models , 2001 .

[36]  W. Geyer,et al.  The importance of boundary‐layer flows in supplying phytoplankton to the benthic suspension feeder, Mytilus edulis L. , 1989 .

[37]  F. Nichols.  Increased benthic grazing: An alternative explanation for low phytoplankton biomass in northern San Francisco Bay during the 1976–1977 drought , 1985 .

[38]  John H. Steele,et al.  A Simple Plankton Model , 1981, The American Naturalist.

[39]  R. Dame,et al.  Bivalve carrying capacity in coastal ecosystems , 2004, Aquatic Ecology.

[40]  M. Dowd.  Seston dynamics in a tidal inlet with shellfish aquaculture: a model study using tracer equations , 2003 .

[41]  M. Pellizzato,et al.  Modelling the growth of Tapes philippinarum in Northern Adriatic lagoons , 2000 .

[42]  A. Ménesguen,et al.  An ecosystem box model for estimating the carrying capacity of a macrotidal shellfish system. , 1994 .

[43]  D. Scott,et al.  A multidisciplinary approach to evaluating impacts of shellfish aquaculture on benthic communities , 1995 .

[44]  M. Dowd.  On predicting the growth of cultured bivalves , 1997 .

[45]  James E. Cloern,et al.  Trophic interactions and direct physical effects control phytoplankton biomass and production in an estuary , 1992 .

[46]  C. Heip,et al.  Production and consumption of biological particles in temperate tidal estuaries , 1995 .

[47]  P. Reichert,et al.  Biogeochemical model of Lake Zürich : sensitivity, identifiability and uncertainty analysis , 2001 .

[48]  G Marion,et al.  Stochastic modelling of environmental variation for biological populations. , 2000, Theoretical population biology.

[49]  H. Jongsma,et al.  The influence of mussel beds on nutrients in the Western Wadden Sea and Eastern Scheldt estuaries , 1991 .

[50]  H. Fischer.  Mixing in Inland and Coastal Waters , 1979 .

[51]  Andrew M. Edwards,et al.  Adding Detritus to a Nutrient–Phytoplankton–Zooplankton Model:A Dynamical-Systems Approach , 2001 .

[52]  J. H. Tuttle,et al.  The trophic consequences of oyster stock rehabilitation in Chesapeake Bay , 1992 .

[53]  Bernard P. Boudreau,et al.  Diagenetic Models and Their Implementation: Modelling Transport and Reactions in Aquatic Sediments , 1996 .

[54]  W. R. Congleton,et al.  Mariculture siting: a GIS description of intertidal areas , 1999 .

[55]  Joanna J. Waniek,et al.  The role of physical forcing in initiation of spring blooms in the northeast Atlantic , 2003 .

[56]  R. Reynolds,et al.  The NCEP/NCAR 40-Year Reanalysis Project , 1996, Renewable Energy.

[57]  Ilona Bärlund,et al.  Ranking of parameters on the basis of their contribution to model uncertainty , 2001 .

[58]  J. Lawton,et al.  Organisms as ecosystem engineers , 1994 .

[59]  A. Vaquer,et al.  Modelling nitrogen, primary production and oxygen in a Mediterranean lagoon. Impact of oysters farming and inputs from the watershed , 2000 .

[60]  Gianpiero Cossarini,et al.  Managing the rearing of Tapes philippinarum in the lagoon of Venice: a decision support system , 2001 .

[61]  M. Hassell.  The dynamics of arthropod predator-prey systems. , 1979, Monographs in population biology.

[62]  Karline Soetaert,et al.  Empirical relationships for use in global diagenetic models , 1997 .

[63]  O. Lindahl,et al.  Changes in the plankton community passing a Mytilus edulis mussel bed , 1999 .

[64]  B. Frost.  A threshold feeding behavior in Calanus pacificus1 , 1975 .

[65]  Michael Dowd,et al.  A Bayesian approach to the ecosystem inverse problem , 2003 .

[66]  B. Hargrave.  Particle sedimentation in the ocean , 1985 .

[67]  C. Solidoro,et al.  Ecological and economic considerations on fishing and rearing of Tapes phillipinarum in the lagoon of Venice , 2003 .

[68]  William H. Press,et al.  Numerical Recipes: FORTRAN , 1988 .

[69]  P. Gillespie,et al.  Effects of mussel aquaculture on the nitrogen cycle and benthic communities in Kenepuru Sound, Marlborough Sounds, New Zealand , 1985 .

[70]  Janet K. Thompson,et al.  Remarkable invasion of San Francisco Bay (California, USA), by the Asian clam Potamocorbula amurensis. II, Displacement of a former community , 1990 .

[71]  T Platt,et al.  Photo inhibition of photosynthesis in natural assemblages of marine phyto plankton , 1980 .

[72]  W. Richard,et al.  TEMPERATURE AND PHYTOPLANKTON GROWTH IN THE SEA , 1972 .

[73]  Vittorio E. Brando,et al.  Assessment of environmental management effects in a shallow water basin using mass-balance models , 2004 .

[74]  D. L. Scarnecchia,et al.  Fundamentals of Ecological Modelling , 1995 .

[75]  C. Gardiner.  Handbook of Stochastic Methods , 1983 .

[76]  W. Kemp,et al.  Nutrient enrichment, habitat variability and trophic transfer efficiency in simple models of pelagic ecosystems , 2001 .

[77]  Philip E. Gill,et al.  Practical optimization , 1981 .

[78]  C. Macleod,et al.  Effects of shellfish farming on the benthic environment , 2003 .

[79]  C. Carver,et al.  Estimating the carrying capacity of a coastal inlet for mussel culture , 1990 .