Question

Figure 4-8 shows how the populations of two different species change over time. What is the relationship between these two species? how did the sudden change in the population of one species between 1900 & 1920 affect the population of the other https://www.connexus.com/content/media/527934-592012-41135-PM-1840173009.jpg

Answer 1

do believe that this relationship is a "Predator-Prey Relationship."

Answer 2

@KJ98 help?
@FirstFrostByte

Answer 3

it asks for a username and password

Answer 4

Its definitely predator (wolf) to prey (deer) by the curve and its inflection points (when it changes direction). Since it seems that wolves rampantly fed on deer between 1900-1920, they became depended on them as their staple food and were not able to adapt to when the deer population decreases (due to their over-hunting). For this reason, the wolf population went back to its original levels and the deer population is all but extinct... damn wolves :-/

Answer 5

do you know this one? the boreal forest and river valley depict in figure 4-6 were swept by fire 20 years ago. does this illustration show an earlier or later stage of succession? which kind of succession has taken place? Explain what will happen in this ecosystem if there are no more disturbances.

Answer 6

I would say this is a later part of succession since you see congiferous trees, which come much later in succession (especially after a forest fire that ravages the plain). This is secondary succession since a disturbance has wiped the land (its primary if it happened without disturbances). If there is no disturbances, I would assume the ecosystem will eventually turn into the climax community. I can't really elaborate further since I am not an ecologist, but I remember this stuff from High School and the biology GRE :)