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Predicting Invasions of Nonindigenous Plants and Plant Pests
biotic:
any process or phenomenon that is caused by living organisms.
carrying capacity:
the theoretical maximum number of individuals in a population that can be supported by a defined set of conditions in an environment.
cline:
a geographic gradient in the frequency of a gene.
confamilial:
belonging to the same family.
congeners:
members of the same genus.
congeneric:
referring to members of the same genus.
conspecific:
referring to members of the same species.
cryptogam:
plants and plant-like organisms that do not reproduce with seeds and do not produce flowers, such as ferns, mosses, fungi, and algae.
demographic:
refers to any attribute or process relating to a population.
deterministic growth rate (λ):
a growth rate that has only one outcome as defined by the parameters or conditions under which the population occurs.
diapause:
a state of arrested growth or development, usually applied only to insects.
dichogamy:
flowers that are functionally male first, then develop female structures.
dioecious:
producing male and female structures on two separate plants within the same species.
dioecy:
in plants, the possession of male and female structures on separate individuals.
diploid:
possession of two full sets of genes and two sets of chromosomes; one set from the mother, one from the father.
dsRNA:
double stranded ribonucleic acid.
ectophagous:
feeding on the outside of the host.
endophagous:
feeding on the internal organs or at least within the body of the host.
endophytic:
fungi that reside within plant cells, or plants that live within other plants.
entomophagous:
insect-feeding.
epiphyte:
a plant that grows on another plant nonparasitically, or grows on an object.
establishment:
permanent self-maintenance of a population without additional members arriving through immigration.
exploitation competition:
competition in which resources obtained by one organism, population, or species results in a lowered resource availability to another organism, population, or species.
floras/faunas:
the collective assembly of all plants (floras) or animals (faunas) within a prescribed area and within a prescribed taxonomic group (for example all insect species in the United States).
founder:
an organism which gives rise to a new populations.
genetic drift:
changes in allelic frequency due to sampling error; that is, changes in frequency that result because the genes appearing in offspring are not