non synchronous recovery of island spiders after hurricane- T.Schoener, D.Spiller

Question 1

how many islands (+where) monitored and for how long?

Answer 1

41 Bahamian islands, 4yrs before and 4yrs after hurricane

Question 2

before the hurricane what was the species area relation like?

Answer 2

strong

Question 3

what did they look at to do with lizards and spiders?

Answer 3

difference in orb spider abundance/richness between island (recovery rate) with and without lizard before and after hurricane

Question 4

was the lizard effect stronger before or after hurricane?

Answer 4

before

Question 5

12 months after hurricane what was the richness and abundance like?

Answer 5

richness reached prehurricane levels but abundance only half the value

Question 6

what is a species area curve?

Answer 6

number of species as a function of area

Question 7

what is the decline of spider abundance like on no lizard islands 4yrs before hurricane?

Answer 7

steady decline

Question 8

what % lower is spider abundance before hurricane on the lizard island?

Answer 8

60% lower

Question 9

before hurricane what was the average spider richness like in no lizard island?

Answer 9

66%

Question 10

before hurricane how many lizard and non lizard islands?

after in April 2000 census?

Answer 10

before: 26 lizard, 15 no lizard

apr 2000: 11 lizard, 30 no lizard

Question 11

immediately after the hurricane what was the species area slope like?

Answer 11

low

Question 12

what happened to the species area slope over the post hurricane years? by which year did the slope reach pre hurricane average?

Answer 12

increased linearly

3rd year

Question 13

when did the gap between lizard and no lizard island spider abundances exceed prehurricane years?

Answer 13

after 4yrs

Question 14

whats the significance like for the lizard effect for:

• spider abundance
• spider species richness

Answer 14

• always signigicant

- a little signifiant

Question 15

was there a richness trend after the hurricane for lizard islands?

Answer 15

no

Question 16

what could a strong lizard effect on spider prey shift towards?

Answer 16

steep species- area slope on lizard islands

Question 17

why was the lizard effect weaker in the 4th year after the hurricane?

Answer 17

tropical storm Mitch
rainfall alongside wind and high sea water can be disruptive
may be cumulative effects from storm

Question 18

what correlation is shown for the magnitude of lizard effect on spider species as a function of lizard density?

Answer 18

+ve

Question 19

are lizards less dense before or after hurricane?

Answer 19

less first 3 yrs after

Question 20

what type of islands are recolonised quicker?

Answer 20

smaller

Question 21

why my spiders not have reached high densities after hurricane?

Answer 21

increased rainfall post hurricane

Question 22

what may be an effect on immigration?

Answer 22

rates decline so less richness and smaller lizard effect

Question 23

is the top predator- lizard- or intermediate- spider- less affected in the short term by climatic disturbance and why?

Answer 23

lizard- top

larger

Question 24

what makes and island :

a) non lizard
b) lizard

Answer 24

a) single male at least 3 visits per census

b) lizards for 3 consecutive years

Question 25

how many species of orb spiders?

Answer 25

16