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An evaluation of a model ecosystem with DDT
Archives of Environmental Contamination and Toxicology, 1980The reproducibility, variability, and reliability of a simple aquatic-terrtestrial model ecosystem experiment was tested with p,p'-DDT. The variation among the model replicates as well as within the units was studied by using hierarchal analysis of variance.
M T, Virtanen +3 more
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Phytoplankton adaptation in ecosystem models
Journal of Theoretical Biology, 2019We compare two different approaches to model adaptation of phytoplankton through trait value changes. Both consider mutation and selection (MuSe) but differ with respect to the underlying conceptual framework. The first one (MuSe-IBM) explicitly considers a population of individuals that are subject to random mutation during cell division.
Aike Beckmann +2 more
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The fate of dieldrin in a model ecosystem
Bulletin of Environmental Contamination and Toxicology, 1973The current interest in environmental quality has stimulated research into the nature and persistence of agricultural chemicals and their metabolites. The widespread occurrence of undesirable residues from the ubiquitous use of the chlorinated hydrocarbons as pest control agents, particularly DDT, has resulted in the gradual termination of these ...
J R, Sanborn, C C, Yu
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A simple model of evolving ecosystems
Artificial Life and Robotics, 2007We investigate the structural properties of an ecosystem model, and show that the model and the field data share similar characteristics. In particular, our model suggests that the universal scaling of the “spanning tree,” which has been discussed using the field data on fewer than 100 species only, can be valid on a larger scale.
Takashi Shimada +4 more
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Model-Driven Engineering Ecosystems
2019 IEEE/ACM 7th International Workshop on Software Engineering for Systems-of-Systems (SESoS) and 13th Workshop on Distributed Software Development, Software Ecosystems and Systems-of-Systems (WDES), 2019Model-Driven Engineering (MDE) comprises the practice of systematically using models during software development. The high diversity of MDE assets (e.g., metamodels, models, model transformation engines, and design tools) has raised a rich, diverse, and complex software ecosystem (SECO), where a collection of assets is governed by underlying rules and ...
Valdemar Vicente Graciano Neto +7 more
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Adventures in holistic ecosystem modelling: the cumberland basin ecosystem model
Netherlands Journal of Sea Research, 1986Abstract A holistic ecosystem model has been developed for the Cumberland Basin, a turbid macrotidal estuary at the head of Canada's Bay of Fundy. The model was constructed as a group exercise involving several dozen scientists. Philosophy of approach and methods were patterned after the BOEDE Ems-Dollard modelling project.
D.C. Gordon +4 more
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Vortices and strings in a model ecosystem
Physical Review E, 1994We study the spatial pattern formation in a model ecosystem by the position-fixed reaction method. This ecosystem contains three biospecies whose competing powers are cyclic. It is well known that this system is self-organized into a quasistationary state, and that the mean-field approximation (MFA) never predicts such a pattern formation.
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Modelling microbial ecosystems
Journal of Applied Bacteriology, 1992M J, Bazin, J I, Prosser
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2009
Ecosystem Management requires models that can link the ecosystem level to the operation level. This link can be created by an ecosystem production model. Because the function of the individual fish in the marine ecosystem, seen in trophic context, is closely related to its size, the model groups fish according to size.
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Ecosystem Management requires models that can link the ecosystem level to the operation level. This link can be created by an ecosystem production model. Because the function of the individual fish in the marine ecosystem, seen in trophic context, is closely related to its size, the model groups fish according to size.
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Making ecosystem models viable
Bulletin of Mathematical Biology, 2003Viability conditions permit to characterize all processes compatible with given constraints, notably of available food, so that there exists at least one possibility for the system to perpetuate itself forever. The concept of contingent cone to a set of constraints permits to identify two classes of corrections to apply to equations of natural growth ...
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