نتایج جستجو برای: coexistence

تعداد نتایج: 18885  

Journal: :Journal of mathematical biology 2011
Sebastian J Schreiber Michel Benaïm Kolawolé A S Atchadé

Understanding under what conditions interacting populations, whether they be plants, animals, or viral particles, coexist is a question of theoretical and practical importance in population biology. Both biotic interactions and environmental fluctuations are key factors that can facilitate or disrupt coexistence. To better understand this interplay between these deterministic and stochastic for...

Journal: :Ecology 2013
Sabine Wollrab André M De Roos Sebastian Diehl

It is widely believed that predation moderates interspecific competition and promotes prey diversity. Still, in models of two prey sharing a resource and a predator, predator-mediated coexistence occurs only over narrow ranges of resource productivity. These models have so far ignored the widespread feature of ontogenetic diet shifts in predators. Here, we theoretically explore the consequences...

Journal: :Theoretical population biology 2013
Martin Hartvig Ken Haste Andersen

Species with a large adult-offspring size ratio and a preferred predator-prey mass ratio undergo ontogenetic trophic niche shift(s) throughout life. Trophic interactions between such species vary throughout life, resulting in different species-level interaction motifs depending on the maximum adult sizes and population size distributions. We explore the assembly and potential for coexistence of...

2013
Rafael D Guariento

Despite the general acknowledgment of the role of niche and fitness differences in community dynamics, species abundance has been coined as a relevant feature not just regarding niche perspectives, but also according to neutral perspectives. Here we explore a minimum probabilistic stochastic model to evaluate the role of populations relative initial and total abundances on species chances to ou...

Journal: :The American naturalist 2003
Michael B Bonsall Robert D Holt

In the absence of other limiting factors, assemblages in which species share a common, effective natural enemy are not expected to persist. Although a variety of mechanisms have been postulated to explain the coexistence of species that share natural enemies, the role of productivity gradients has not been explored in detail. Here, we examine how enrichment can affect the outcome of apparent co...

1995
H P. P

We construct a model of a multispecies forest that is often affected by major fires and explicitly incorporates life-history attributes of trees that are related to fire—flammability and susceptibility to fire. The model is used to explore coexistence mechanisms in forests; two fire-dependent coexistence mechanisms were identified. The first allows coexistence along a temporal axis since the la...

Journal: :The Journal of chemical physics 2010
M M Conde C Vega

Molecular dynamics simulations have been performed to estimate the three-phase (solid hydrate-liquid water-gaseous methane) coexistence line for the water-methane binary mixture. The temperature at which the three phases are in equilibrium was determined for three different pressures, namely, 40, 100, and 400 bar by using direct coexistence simulations. In the simulations water was described by...

2017
Zhongcheng Wei Yongmei Sun Yuefeng Ji

As an important coexistence technology, channel hopping can reduce the interference among Wireless Body Area Networks (WBANs). However, it simultaneously brings some issues, such as energy waste, long latency and communication interruptions, etc. In this paper, we propose an enhanced channel hopping mechanism that allows multiple WBANs coexisted in the same channel. In order to evaluate the coe...

Journal: :Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics 1995
Stevens Grest

We examine two aspects of Stockmayer fluids which consists of point dipoles that additionally interact via an attractive Lennard-Jones potential. We perform Monte Carlo simulations to examine the effect of an applied field on the liquid-gas phase coexistence and show that a magnetic fluid phase does exist in the absence of an applied field. As part of the search for the magnetic fluid phase, we...

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