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Flashcards in Invasive Species Deck (49)
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1

What is the driving force behind biodiversity loss?

Human activities

2

What % of species imported appear in the wild?

10%

3

What % of species become established?

10%

4

What % of species become a pest?

10%

5

What is the rule?

10% rule

6

Give three examples of the types of invasive species

Predator
Parasite
Parasitoid

7

Give three more examples of the type of invasive species

Pathogen
Herbivore
Swamping (growing in dense concentrations)

8

Give an example of an invasive parasite

the isopod that has invaded mud shrimp

9

How does the isopod affect mud shrimp?

Enters the gill chamber, sucks the blood and destroys the ability to reproduce

10

Invasive species are an important component of what?

Evolutionary processes

11

How are most invasive species introduced?

Purposely mediated human introductions as garden plants
Horticultural industry
Farming
Accidental

12

Do all introductions have negative effects?

No not all

13

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

14

In the UK, what percentage of plant species are non-native?

10%

15

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

16

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).

17

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

18

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

19

What makes a good invasive species?

High productive rate
Broad habitat requirements
Good dispersal

20

What makes s good habitat for invasion?

Early successional area
Disturbed areas

21

Why are remote islands good for invasive species?

Low taxonomic diversity
Empty niche space
No predators

22

Define invaders

A species from somewhere else

23

Define Weed or pest

A species that someone would like to remove

24

Give an example of two stowaways

Black rat and house mice

25

Give an example of an invasive mammal in the UK

The Rabbit

26

Where are rabbits native?

The Iberian peninsular

27

Are rabbits invasive in their native range? And if not, what are their characteristics

Never a pest, smaller and mature earlier
Lower reproduction rate

28

When were rabbits introduced into the UK?

12th Century

29

How did rabbits evolve?

They became more hardy and prolific

30

How did agriculture help rabbits?

Winter crops facilitated their establishment