Results 251 to 260 of about 233,008 (296)
Some of the next articles are maybe not open access.
Modelling of predator–prey trophic interactions. Part I: two trophic levels
Journal of Mathematical Biology, 2005A class of lumped parameter models to describe the local dynamics in a controlled environment of a two-trophic chain is considered. The class is characterized by a trophic function (functional response of predator to the abundance of prey) depending on the ratio of prey biomass x and a linear function of predator biomass y: f(qx/[(1-rho)k + rhoy ...
BUFFONI G. +3 more
openaire +3 more sources
Modelling of predator–prey trophic interactions. Part II: Three trophic levels
Journal of Mathematical Biology, 2006A general class of lumped parameter models describing the local dynamics of a tri-trophic chain in a controlled environment is analyzed in detail. The trophic functions characterizing the interactions are defined only by some properties and allow us to treat both prey-dependent and ratio-dependent models in a unified manner.
BUFFONI G, CASSINARI M. P, GROPPI, Maria
openaire +4 more sources
Nerve regeneration model and trophic factors in vivo
Brain Research, 1982The proximal stump of a transected rat sciatic nerve has been observed to regenerate through a cylindrical silicone chamber across a 10 mm gap to the distal stump. The fluid filling such in vivo chambers contains trophic factors that ensure in vitro survival and growth of at least sensory neurons from rodent dorsal root ganglia--as already demonstrated
G, Lundborg, F M, Longo, S, Varon
openaire +2 more sources
Abiotic forcing in allometric trophic network models
2022Current ecological research and ecosystem management call for improved understanding of the abiotic drivers of community dynamics, including temperature effects on species interactions and biomass accumulation. Allometric trophic network (ATN) models provide an attractive framework to study consumer-resource interactions from organisms to ecosystems ...
Antti Eloranta +2 more
openaire +1 more source
Isotope trophic‐step fractionation: a dynamic equilibrium model
Journal of Animal Ecology, 2003SummaryTrophic position is a fundamental feature of food‐web structure, knowledge of which is being improved by stable isotope approaches which assume a constant enrichment in heavier isotopes in consumers relative to their diet.We argue that the typical enrichment reflects a dynamic equilibrium between fractionation vectors associated with ...
Olive PJW +4 more
openaire +3 more sources
ATNr: Allometric trophic models in R
2022AbstractUnderstanding and predicting how densities of interacting species change over time has been one of the main goals of community ecology, which has become a pressing challenge in the context of global change.We present the R packageATNr, which provides an implementation of different versions of Allometric Trophic Network models (Yodzis and Innes (
Benoit Gauzens +3 more
openaire +1 more source
Extinctions and taxonomy in a trophic model of coevolution
Physical Review E, 2000We investigate the statistics of extinction sizes and the taxonomy in a trophic model of evolution recently proposed [Phys. Rev. Lett. 82, 652 (1999)]. By further exploring the parameters of this model, we find that the distribution of extinction sizes N(s) shows typically a characteristic maximum before developing the power-law behavior N(s ...
J, Camacho, R V, Solé
openaire +2 more sources
Infusing considerations of trophic dependencies into species distribution modelling
Ecology Letters, 2014AbstractCommunity ecology involves studying the interdependence of species with each other and their environment to predict their geographical distribution and abundance. Modern species distribution analyses characterise species‐environment dependency well, but offer only crude approximations of species interdependency.
Anne M, Trainor, Oswald J, Schmitz
openaire +2 more sources
Models with several species and trophic levels
2014The interspecific competition and predation models for two species interaction, presented in Chaps. 6 and 7, can be used as building blocks for designing more general mechanisms and ecosystems. Moving beyond the two species framework, we are led to consider non-planar systems and we meet systems that are mathematically more complex, possibly requiring ...
Mimmo Iannelli, Andrea Pugliese
openaire +1 more source
Trophic modelling of the North Sea
No abstracts are to be cited without prior reference to the author.Ecopath with Ecosim methodology is a widely used tool for the quantification of food webs and analysis of ecosystem dynamics (Pauly et al. 2000). The approach is founded on a static description of the ecosystem represented by biomasses aggregated into ecologically functional groups ...Daskalov, G., Mackinson, S.
openaire +1 more source