Animal Population Over Time The bar graph represents experimental data collected in a region of northern Canada starting when it was first colonized. The graph identifies trends in animal population over a 100-year period. bear deer horse dog 0 1 2 3 4 5 6 7 8 9 human population (millions) animal population

Use the information and table to answer the following question. An ecologist is studying a population of mosquitos living in a nearby pond. The ecologist estimates the population size twice a day - once at sunrise and once at sunset - for 5 days during the summer when mosquitos are reproducing. Their data is shown. Based on the data, what is the estimated carrying capacity for the population and what factor may have led to a change in data at day three? a. The estimated carrying capacity is approximately 167 thousand. The population may have decreased during day three because of decreased pressure from a limiting factor such as reduction of predators eating the mosquitos. b. The estimated carrying capacity is approximately 188 thousand. The population may have decreased during day three because of decreased pressure from limiting factors, such as more food being available.c. The estimated carrying capacity is approximately 188 thousand. The population may have decreased during day…

Based on the data (and your graph), which of the native species will be least affected by the introduction of the bullfrogs? Please provide EVIDENCE to support your CLAIM.

Mule Deer Use the passage to answer the question. This image shows a male mule deer (Odocoileus hemionus), which is native to western North America. Named for their large ears, mule deer are hunted for sport and food under strict management practices, such as designated hunting seasons and limits on how many deer a hunter can take. A) In a short paragraph, propose a hypothesis to test the effect of a zoned reserve on mule deer populations. Justify your hypothesis based on your knowledge of zoned reserves. B) In 1-2 short paragraphs, outline a field experiment to test your hypothesis on the effect of a zoned reserve on mule deer populations. Describe your control group, experimental group, and the data you would collect. Identify at least two environmental factors that could affect your data collection and how you would address them, if possible.

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?          physiological change         predation         competition         disease and parasites

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…

Relate the growth of the human population to our ecological footprint and explain the idea. of limits to population growth know as the Carrying capacity?

Suppose that researchers wanted to examine the combined effects of an introduced predator (a trout) and the trematode parasite Ribeiroia on amphibian populations. To do this, they established frog populations in each of 40 artificial ponds. Each pond was assigned at random to one of four treatments (10 ponds per treatment): 1) neither trout or parasites were added to the pond (the "No trout, no parasite" treatment); 2) no trout were added but parasites were added ("No trout, parasite added"); 3) trout were added but parasites were not added ("Trout added, no parasite"); and 4) both trout and parasites were added ("Trout added, parasite added"). Each pond contained refugia where tadpoles could avoid attack by trout, to avoid fish predators driving frog populations to extinction in an artificial pond, unlike what typically occurs in a natural pond. After two breeding seasons, the researchers estimated the density of frogs in each pond. The results are shown in the table and the figure.…

Use the information and table to answer the following question. An ecologist is studying a population of mosquitos living in a nearby pond. The ecologist estimates the population size twice a day - once at sunrise and once at sunset - for 5 days during the summer when mosquitos are reproducing. Their data is shown. Day 2 3 16 5 Time Sunrise Sunset Sunrise Sunset Sunrise Sunset Sunrise Sunset Sunrise Sunset Population Size (in thousands) 200 189 187 185 167 180 186 Based on the data, what is the estimated carrying capacity for the population and what factor may have led to a change in data at day three?

Use the logistic equation to estimate population size two generations (Nt+2) after a population was counted  as having 1,000 individuals (=N0), with a carrying capacity = 5,000 and r = 0.3 The subject is ecology.