Modeling the Lake Mendota Ecosystem: Synthesis and Evaluation of Progress
The models presented in the three preceding chapters were planned as elements of an integrated ecosystem approach from phosphorus to fishes. The modeling problem was broken into three parts in order to maximize our rate of progress and make best use of the people involved. The modules—piscivory, planktivory, and herbivory-algae-nutrients—have fundamentally different time scales yet strong vertical interactions (Figure 22.1). Within a given nutrient and weather regime, differences in return time cause the upper modules to act as constraints on lower ones (O’Neill et al. 1986). Piscivore dynamics have return times of years (Post and Rudstam, Ch. 19). Stock and harvest policies as well as resource levels must be considered in modeling piscivory. Planktivory by fishes has return times of years, while that by the zooplankter Leptodora has return times of weeks (Luecke el at., Ch. 20). Herbivory, algal growth, and nutrient fluxes have rapid dynamics and short return times of a few days (Vanni et al., Ch. 21).
KeywordsAlgal Biomass Return Time Yellow Perch Weather Regime Phosphorus Input
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- Bartell SM, Brenkert AL, O’Neill RV, Gardner RH (1988) Temporal variation in regulation of production in a pelagic food web model. In Carpenter SR (ed) Complex interactions in lake communities, Springer-Verlag, New York, pp 101–118Google Scholar
- Carpenter SR (ed) (1988) Complex interactions in lake communities. Springer-Verlag, New YorkGoogle Scholar
- Caswell H (1989) Matrix population models. Sinauer Associates, Sunderland, MassachusettsGoogle Scholar
- Chapra SC, Reckhow KH (1983) Engineering approaches for lake management. Vol. 2: Mechanistic modeling. Butterworths, BostonGoogle Scholar
- Gulati RD, Lammens EHRR, Meijer M-L, van Donk E (eds) (1990) Biomanipulation, tool for water management. Kluwer Academic Publishers, DordrechtGoogle Scholar
- Jorgensen, SE (1983) Application of ecological modelling in environmental management. Elsevier Scientific Publishers, AmsterdamGoogle Scholar
- Kitchell JF, Bartell SM, Carpenter SR, Hall DJ, McQueen DJ, Neill WE, Scavia D, Werner EE (1988) Epistemology, experiments, and pragmatism. In Carpenter SR (ed) Complex interactions in lake communities, Springer-Verlag, New York, pp 263–280Google Scholar
- O’Neill RV, DeAngelis DL, Waide JB, Allen TFH (1986) A hierarchical concept of ecosystems. Princeton University Press, Princeton, New JerseyGoogle Scholar
- Scavia D, Robertson A (1979) Perspectives on lake ecosystem modeling. Ann Arbor Science, Ann Arbor, MichiganGoogle Scholar
- Strong DR (1986) Density vagueness: Abiding the variance in the demography of real populations. In Diamond J, Case TJ (eds) Community ecology, Harper and Row, New York, pp 257–268Google Scholar