Invasion and persistence of plant parasites in a spatially structured host population

Article Abstract:

Key parameters are described which govern a plant parasite's ability to invade and remain within a host population. These are the parasite basic reproductive numbers within a population patch, and the ways in which neighboring population patches interact. These parameters characterize the ability of the parasite to spread over larger spatial scales.

Plant-pathogen relationships, Biological invasions

---

Density-dependent dispersal in host-parasitoid assemblages

Article Abstract:

Studies on interactions between the parasitoid wasp Anisopteromalus calandrae and its host beetle Callosobruchus chinensis demonstrate the key role of population density in determining invasive species' rate of spread in a given environment. A metapopulation model that incorporates a wider range of dispersal functions is applied and explicated.

Sweden, Behavior, Insects, Wasps, Beetles, Dispersal (Ecology), Host-parasite relationships

---

Which traits promote persistence of feral GM crops? Part 1: Implications of environmental stochasticity

Article Abstract:

The population growth rate, elasticities and quasi-extinction times are studied with the help of stochastic matrix model to assess the fate of specific generally modified (GM) plants in cultivated or natural environment. The result indicates that changes in survival in the seed bank impact population growth and persistence most.

United States, Science & research, Genetically modified crops

Similar abstracts:

• Abstracts: Herbivory modifies the genetic structure of birch populations. Variation in birch bark secondary chemistry between and within clones: implications for herbivory by hares
• Abstracts: Pond permanence and the effects of exotic vertebrates on anurans. Species introductions and their ecological consequences: an example with congeneric sunfish
• Abstracts: Direct experimental evidence for alternative stable states: A review. Size-dependent attack rate and handling capacity: inter-cohort competition in a zooplanktivorous fish
• Abstracts: Predator-prey interactions in a nonequilibrium context: the metapopulation approach to modeling "hide-and-seek" dynamics in a spatially explicit tri-trophic system. part 2
• Abstracts: Deleting species from model food webs. Phenotypic plasticity in gender specific life-history: Effects of food availability and predation

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.