Questions: How does temporal variation in competitive advantage affect advance from rarity and species abundances in an individual-based ecology? In particular, how does the difference between the timescale of competitive invasion and the timescale of environmental periodicity interact with the spatial clustering underlying invasion to influence global population dynamics? Features of model: We...

Biological invasions are global threats to biodiversity and parasites might play a role in determining invasion outcomes. Transmission of parasites from invading to native species can occur, aiding the invasion process, whilst the 'release' of invaders from parasites can also facilitate invasions. Parasites might also have indirect effects on the outcomes of invasions by mediating a range of co...

Uncomplicated pyelonephritis in man is almost always produced by a single species of bacteria, ordinarily a Gram-negative organism. Mixed infection of the urinary tract is usually associated with chronic obstruction or instrumentation. In animals the production of pyelonephritis results in an acute process, and in most models a single species of bacteria has been used as the infecting agent. It...

Theoretically, the functional traits of native species should determine how natives respond to invader-driven changes. To explore this idea, we simulated a large-scale plant invasion using dead spotted knapweed (Centaurea stoebe) stems to determine if native spiders' web-building behaviors could explain differences in spider population responses to structural changes arising from C. stoebe inva...

INTRODUCTION The european eel is one of the major fishing objects of the Russian fishery zone of the Vistula Lagoon (Baltic Sea). This is the reason that its parasite fauna was studied within 1998-2005. MATERIAL AND METHODS Totally 142 individuals of 35-81 cm in length were examined. The parasites collected from various organs were fixed and processed according to commonly accepted methods. ...

Motivated by evolutionary biology, we study general infinite-dimensional dynamical systems involving two species the resident and the invader. Sufficient conditions for competition exclusion phenomena are given when the two species plays similar strategies. Those conditions are based on invasibility criteria, for instance, evolutionarily stable strategies in the framework of adaptive dynamics. ...

The single-species Continuously Stable Strategy (CSS) and Neighborhood Invader Strategy (NIS) concepts, originally developed as intuitive stability conditions for the evolution of the average trait of a monomorphic population (known as the adaptive dynamics approach), are shown to be relevant for dynamic stability of coevolutionary systems with finitely many traits parameterized by points in a ...

Rosa rugosa Thunb. (Japanese Rose) is one of the most invasive species in Europe. It spreads spontaneously coastal areas western, central and northern Europe, posing a threat to dune habitats, including those indicated EU Habitats Directive as particularly valuable. R. has already been reported displace native plants alter soil properties. However, little known about how these effects are media...

Studies of bioinvasions have revealed various strategies of invasion, depending on the ecosystem invaded and the alien species concerned. Here, we consider how migration (as a demographic factor), as well as ecological and evolutionary changes, affect invasion success. We propose three main theoretical scenarios that depend on how these factors generate the match between an invader and its new ...