SCAVIA and BRIAN
نویسنده
چکیده
Scavia, D. and Eadie, B.J., 1976. The use of measurable coefficients in process formulations -zooplankton grazing. Ecol. Modelling, 2: 315--319. This paper redefines a construct previously used to model phytoplankton--zooplankton interactions in such a way as to permit the use of measurable quantities as construct coefficients. The new construct can use unaltered values of the half-saturation constant for zooplankton grazing on total available food (ks) and the minimum food concentration necessary to stimulate effective feeding (BMIN) reported in the literature. Typical values for these coefficients are 0.1--15 and 0.016--0.19, respectively. Modellers of aquat ic ecosys tems strive to obta in realistic process formulat ions in their models . In developing expressions to mimic func t iona l processes in these models , one should obta in an equa t ion whose coeff icients can be es t imated f r o m ei ther existing l i terature or t rac table l abora to ry and /o r field exper iments . In this way, the cal ibrat ion step in mode l deve lopmen t can be p e r f o r m e d more readily and the assumpt ions sur rounding the convers ion of existing process coeff ic ient values can be kept to a min imum. The purpose of this no te is to redefine a cons t ruc t used for model l ing zoop l ank ton grazing so tha t its coeff ic ients are readily estimable. The original cons t ruc t was developed by O'Neil l et al. (1972) and modified by Bloomfie ld et al. (1973) . I t has been used in various ecosys tem models (Park et al., 1974, 1975) and is descr ibed in detail by Scavia and Park (1976) . The basic equa t ion iCii = CMAXj Wij (B(--BMIN,~) 1 B~., ' :K i + ~ Wi j (B i BMINij)~ (1)
منابع مشابه
Documentation of CLEANX : a generalized model for simulating the open - water ecosystems of lakes * by Don Scavia
Don Scavia (above, left), who had primary responsibility for implementation of CLEANX, has a BS and an MS in environmental engineering; he is currently a research assistant in the Fresh Water Institute. Jay Bloomfield (above, right), who worked closely with Scavia in the implementation and was instrumental in developing the original program code for the overall CLEAN model, also has BS and MS d...
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Gaia Scavia, Stefano Morabito, Rosangela Tozzoli, Valeria Michelacci, Maria Luisa Marziano, Fabio Minelli, Clarissa Ferreri, Fabio Paglialonga, Alberto Edefonti, and Alfredo Caprioli Author affi liations: Istituto Superiore di Sanità, Rome, Italy (G. Scavia, S. Morabito, R. Tozzoli, V. Michelacci, M.L. Marziano, F. Minelli, C. Ferreri, A. Caprioli); and Ospedale Maggiore Policlinico, Milan, Ita...
متن کاملThe Potential Consequences of Climate Variability and Change on Coastal Areas and Marine Resources
The following document can be cited as: Boesch, D.F., J.C. Field, and D. Scavia, (Eds.) 2000. The Potential Consequences of Climate Variability and Change on Coastal Areas and Marine Resources: Report of the Coastal Areas and Marine Resources Sector Team, U.S. National Assessment of the Potential Consequences of Climate Variability and Change, U.S. Global Change Research Program. NOAA Coastal O...
متن کاملCalculation and Use of Selectivity Coefficients of Feeding : Zooplankton Grazing
Vanderploeg, H.A. and Scavia, D., 1979. Calculation and use of selectivity coefficients of feeding: zooplankton grazing. Ecol. Modelling, 7: 135--149. A straightforward method of calculating selectivity coefficients (Wii) of predation from raw data, mortality rates of prey, filtering rates, feeding rates and electivity indices is derived. Results from a comparison of selectivity coefficients fo...
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