Categorize the following scenarios as density-dependent and density-independent limiting factors A: A flood wipes out all the plant species that live on a river bed. B: A pack of wolves migrates to a new valley and eats all the deer that inhabit that space. C: A large population of zebras are killed due to a very contagious virus D: A drought kills many of the deer that live in a valley. A В C D

Asian carp are an invasive species of fish. When the Asian carp invade a river or lake, they overtake the food and space from the native fish. What type of density-dependent factor would this be considered?

An ecologist does an experiment in a grassland.  She has several plots of land with prairie plants on them.  Each plot is either a control (nothing added) or one of the following nutrients was added (phosphorus, nitrogen, and sulfur).  Over the following month the phosphorus and sulfur plots had primary productivity similar to the control plots while the plots with added nitrogen had significantly higher primary productivity.  Based on this you can conclude that nitrogen is… Group of answer choices a. flowing b. fixed c. biologically magnified d. a limiting nutrient e. cycling

INTERPRETING ECOLOGICAL DATA Graph 1: Rabbits Over Time a. The graph shows a b. The carrying capacity for rabbits is c. During which month were the rabbits in exponential growth? Graph 2: Average Toe Length a. In 1800, about how many people surveyed had a 3 cm toe? How many in 2000? b. The data shows the c. In 2000, what is the average toe length? Number of people (in thousands) 120 100 80 60 40 20 growth curve. Year 2000 Year 1800 Name: Graph 3: Mexico and US selection has occurred? Length of big toe (in centimeters) May 1st What is the average toe length in 1800 a. In Mexico, what percentage of the population is between 0-4 years of age? In the US? b. Which population is growing the fastest? c. Which age group has the smallest number in both countries? Chart 4: Trapping Geese In order to estimate the population of geese in Northern Wisconsin, ecologists marked 10 geese and then released them back into the population. Over a 6 year period, geese were trapped and their numbers…