Results 251 to 260 of about 160,879 (302)

Deriving reaction?diffusion models in ecology from interacting particle systems

Journal of Mathematical Biology, 2004
We use a scaling procedure based on averaging Poisson distributed random variables to derive population level models from local models of interactions between individuals. The procedure is suggested by using the idea of hydrodynamic limits to derive reaction-diffusion models for population interactions from interacting particle systems.
Cantrell, R. S., Cosner, C.
openaire   +2 more sources

RETRACTED: Environmentally relevant concentrations of microplastic particles influence larval fish ecology

Science, 2016
Microplastic's triple threat The billions of tons of plastics that we release into the environment for the most part do not biodegrade. But they do degrade, breaking into ever smaller particles that end up in the oceans. Lönnstedt et al.
Oona M, Lönnstedt, Peter, Eklöv
openaire   +2 more sources

Implications of network particle tracking (NPT) for ecological model interpretation

Ecological Modelling, 2009
Abstract Network particle tracking (NPT), building on the foundation of network environ analysis (NEA), is a new development in the definition of coherence relations within and between connected systems. This paper evaluates three ecosystem models in a comparison of throughflow- and storage-based NEA and NPT. Compartments in models with high indirect
E.W. Tollner, J.R. Schramski, C. Kazanci, B.C. Patten   +3 more
openaire   +1 more source

Multi-Reservoir Ecological Operation Using Multi-Objective Particle Swarm Optimization

Applied Mechanics and Materials, 2014
Traditional reservoir operation ignores ecological demands of rivers. This would probably lead to degradation of river ecosystem. In order to alleviate the influence of reservoirs on river ecosystem, multi-objective reservoir ecological operation was proposed from perspective of maintaining the river ecosystem health. Multi-objective mathematical model
Wei Lin Liu, Li Na Liu
openaire   +1 more source

Chemical characteristics analysis of automobile exhaust particles and the method for evaluating its ecological effect

Chemosphere, 2022
Automobile exhaust has become the main source of atmospheric particulate matter with the increase in the number of automobiles. Automobile exhaust particles (AEPs) discharged into the atmosphere can enter the aquatic environment through atmospheric deposition, rain runoff, leaching, drainage water and urban sewage and further affect aquatic organisms ...
Liang, Cui, Hong, Ni, Kun, Lei, Xiangyun, Gao, Xiaonan, Wang, Zhengtao, Liu   +5 more
openaire   +2 more sources

Ecology of riverine particles

2008
Depending on the origin, riverine aggregates (suspended material) harbor a complex mixture of inorganic and organic components. The living organic components are characterized by nucleic acid-containing constituents such as algae, protozoa, fungi, bacteria and virus-like particles.
openaire   +1 more source

Particle Swarm Optimization inspired by r- and K-Selection in ecology

2008 IEEE Congress on Evolutionary Computation (IEEE World Congress on Computational Intelligence), 2008
An optimization technique named r/KPSO (particle swarm optimization with r- and K-selection) was developed in this paper. In Ecology, two evolutionary ldquostrategiesrdquo are termed, r-selection for those species that breed many ldquocheaprdquo offspring and live in unstable environments and K-selection for those species that produce few ...
null Yunyi Yan, null Baolong Guo
openaire   +1 more source

Particle Size Spectra in Ecology

1984
The use of size distributions as descriptors of ecosystems goes back at least to Elton (1927), although quantitative applications have appeared only during the past decade. Elton noted that there was a characteristic difference between terrestrial and aquatic ecosystems; on land the organisms in the lower trophic levels tend to be larger than the ...
openaire   +1 more source

Purification Effect on Particle Size of Matrix in Ecological Filter Bed

Applied Mechanics and Materials, 2012
In order to study the purification effect on the particle size of matrix in ecological filter bed, four ecological filter bed units with different particle sizes (0~2mm, 2~15mm, 15~30mm, 30~50mm) are designed to purify the polluted river water. Results show that the particle size of matrix has considerable influence on the polluted river water quality ...
Ming Tao Zhou, Ping Yang, Huan Hu
openaire   +1 more source