Flashcards in Invasive Species Deck (49)
What is the driving force behind biodiversity loss?
What % of species imported appear in the wild?
What % of species become established?
What % of species become a pest?
What is the rule?
Give three examples of the types of invasive species
Give three more examples of the type of invasive species
Swamping (growing in dense concentrations)
Give an example of an invasive parasite
the isopod that has invaded mud shrimp
How does the isopod affect mud shrimp?
Enters the gill chamber, sucks the blood and destroys the ability to reproduce
Invasive species are an important component of what?
How are most invasive species introduced?
Purposely mediated human introductions as garden plants
Do all introductions have negative effects?
No not all
Give an example of how one invasive plant can have a positive impact on native biodiversity
Himalayan Balsam has the ability to offer a valuable nectar source for pollinators in later summer months
In the UK, what percentage of plant species are non-native?
Give an example of the percentage of non-native species found in another country
In New Zealand up to 50% of the plant species are non-native
Give an example of the rate in which a species can invade
Himalayan Balsam was introduced as a garden plant in 1839 and quickly adapted to the environment, reproducing in large numbers (Hedja, 2009).
Give a characteristic of a why an invasive species may be successful
Himalayan Balsam has an ability to literally launch its seeds over a distance of 3-5 meters (Ammer, 2011) and using river habitats to disperse further
How can some native species be vulnerable to invasion?
Some plant species may be specialist in their habitat requirements, and invasive alien species are normally generalist species
What makes a good invasive species?
High productive rate
Broad habitat requirements
What makes s good habitat for invasion?
Early successional area
Why are remote islands good for invasive species?
Low taxonomic diversity
Empty niche space
A species from somewhere else
Define Weed or pest
A species that someone would like to remove
Give an example of two stowaways
Black rat and house mice
Give an example of an invasive mammal in the UK
Where are rabbits native?
The Iberian peninsular
Are rabbits invasive in their native range? And if not, what are their characteristics
Never a pest, smaller and mature earlier
Lower reproduction rate
When were rabbits introduced into the UK?
How did rabbits evolve?
They became more hardy and prolific