نتایج جستجو برای: population ecology theory
تعداد نتایج: 1491992 فیلتر نتایج به سال:
1. Introduction. "The logistic difference equation x t + 1 = rXtO-xt) with r =3.7 produces erratic, chaotically fluctuating values of xt (Figure la). Contemplating this time-series, Solomon (979) asked, "How could the trajectory of this completely determined process ever be distinguished from the sample path of a stochastic one?" The implication is that there is no way to tell if fluctuations i...
Many natural patterns, such as the distributions of blood particles in a blood sample, proteins on cell surfaces, biological populations in their habitat, galaxies in the universe, the sequence of human genes, and the fitness in evolutionary computing, have been found to follow power law (e.g., Kendal 2004, Illian et al. 2008, Venter 2001, Ma 2012). Taylor’s power law (Taylor 1961: Nature, vol....
Theoretical biology has largely ignored Darwin 's true evolution model. In his famous book about the origin of species, Darwin detailed the importance of a population structure on evolution. He conjectured that a large continent that exists for long periods in a broken condition will be the most favorable for the production of many new forms of life. We call this conject ure Darwin 's continent...
One of the theoretical approaches to study spatially-extended ecosystems is given by metapopulation models, which consider fragmented populations inhabiting discrete patches linked by migration. Most of the metapopulation models assume exponential growth of the local populations and few works have explored the role of cooperation in fragmented ecosystems. In this letter we study the dynamics an...
The desire to predict the consequences of global environmental change has been the driver towards more realistic models embracing the variability and uncertainties inherent in ecology. Statistical ecology has gelled over the past decade as a discipline that moves away from describing patterns towards modelling the ecological processes that generate these patterns. Following the fourth Internati...
He received his B.Sc. degree in Biology (1990) from Department of Biology, University of British Columbia, Canada, also M.Sc. in Botany (1993) from Department of Botany, University of British Columbia, Canada and Ph.D. in Plant Ecology (1996) from Department of Animal & Plant Sciences, University of Sheffield, England.Dr. Fraser's expertise is in grassland and wetland ecosystems, with a focus o...
Cities are home to more than half of the world population. Cities have been the centers of economic and social developments, as well as sources of many major environmental problems. Cities are created and maintained by the most intense form of human-nature interactions. Cities are spatially extended, complex adaptive systems—which we call landscapes. The future of humanity will increasingly rel...
One key issue for theory in stream ecology is how much stream flow can be changed while still maintaining an intact stream ecology, instream flow needs (IFNs); the study of determining IFNs is challenging due to the complex and dynamic nature of the interaction between the stream environment and the biological community. We develop a process-oriented benthic-drift model that links changes in th...
One key issue for theory in stream ecology is how much stream flow can be changed while still maintaining an intact stream ecology, instream flow needs (IFNs); the study of determining IFNs is challenging due to the complex and dynamic nature of the interaction between the stream environment and the biological community. We develop a process-oriented benthic-drift model that links changes in th...
Aznar, F. Javier, et al. 2001. Establishing the relative importance of sympatric definitive hosts in the transmission of the sealworm, Pseudoterranova decipiens: a host-community approach, pp. 161171 In: Geneviève Desportes and Gary McClelland, editors, Sealworms in the North Atlantic: ecology and population dynamics. North Atlantic Marine Mammal Commission, Tromso. NMML BOOK COLLECTION QL128 ....
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