Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BIO 182 Practical 3
Questions covered in Lab Assessments from BIO 182
| Question | Answer |
|---|---|
| How has the southern-most range of many species changed over the past several decades? | They have moved north |
| Why is it so important to have long term data sets on the distribution and abundance of organisms? | - So we can make better informed decisions in how to manage the species - So we can make accurate predications about the future distribution and abundance of the species or population. |
| In ecology we use quantitative methods to describe and characterize plant ecosystems like forests. Why should we want to use quantitate vs descriptive methods? | Quantitative methods remove subjective bias by the investigator |
| You have 100 sampling points. The total distance for all species is 760m. For eucalyptus trees the total distance is 620m and you found them in 323 quarters. What is the absolute tree density of trees/ha? | 2770 |
| You have 100 sampling points. The total distance for all species is 760m. For eucalyptus trees the total distance is 620m and you found them in 323 quarters. What is the absolute tree density of eucalyptus trees/ha? | 2237 |
| What is the total number of creosote plants for all quadrats? | 20 |
| What is the total number of ironwood trees for all quadrats? | 1 |
| What is the total number of wolfberry plants for all quadrats? | 4 |
| What is the density of creosote plants? | 1111 |
| What is the density of triangle leaf bursage plants? | 500 |
| What is the density of brittlebush plants? | 222 |
| What is the density of paloverde trees? | 55 |
| Think about ratios. A ratio of 1:2 is the same as 2:4 or 3:6 and the same as z:12. What is the value of z? | 6 |
| Think about ratios. A ratio of 7:21 is the same as 1:3 or 2:6 or 12.6:37.8 and the same as z:45. What is the value of z? | 15 |
| Day 1: # unmarked animals/# marked animals = Day2: # X / Z. What are X and Z? | # unmarked animals/# marked animals |
| (On day 1, 36 animals are trapped and marked with tags then released. A week later, animals are trapped in the same area using the exactly the same methods. 29 animals are captured, and of these 18 have tags.), what is the estimated population size. | 58 |
| What is the estimated population size of the kangaroo rats? | 40 |
| What would do to increase the accuracy of the estimate of the kangaroo rat population size? | Repeat the mark and recapture study over several nights to increase the replicate size |
| What is the estimated size of the packrat population? | 3 - although more trapping is needed |
| What is the estimated population size of the jumping mouse population? | 12 |
| What method of marking the mice would you choose? | PIT tags |
| How do you explain that on some nights you never capture a single mouse? | It was likely a full moon |
| What is the total estimated packrat population size on campus? | 22.08 |
| What is the density of packrats in # of animals per hectare? | 0.46 |
| From the tasks you completed in Part 4 of your lab, what is the total number of packrats on campus? | 59.22 |
| From the tasks you completed in Part 4 of your lab, what is the density of packrats on campus? | 1.23 |
Created by:
johnnyharrod13
Popular Biology sets