Invasive Species Flashcards
invasive species
nonindigenous species moved beyond its natural range or zone of potential dispersal
impetus for dispersal for indigenous species
negative ecological interactions
normal part of life
factors limiting dispersal indigenous species
species mobility
physical barriers
biological barriers
climate (physiology)
food
predators/ competition
**What makes a good non invasive species
high reproductive rate
high fecundity
short interbreeding period
short generation time with rapid maturation
high dispersal rate
broad native range
Tolerant of a wide range of water quality
ecological generalist
high genetic variability
mechanisms for a successful invasion
replacement and displacement
replacement in invasions
habitat degradation creates conditions that are no longer favorable for native species
anthropegenic or natural
anthropedgenic disturbances
siltation
dredging
climate change
natural disturbances
flooding
storms
what does replacement in invasions imply about the native species
that they are specialists
Does replacement require interaction
no
displacement invasions
biotic interactions
predation, competition, or introduction of parasites and diseases
who preys on who during displacement invasion
indigenous species gets prayed on by non indigenous speicies
competitive exclusion principle
both species go for same food, space, reproductive habitat
what are the most successful invasions, replacement or displacememnt
a combination of both
how do nonindigenous aquatic plants spread
seeds, fragments, or whole plants
