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Competition
| Question | Answer |
|---|---|
| Community Ecology | interaction between different species |
| Competition VS. Predation | Competition: both organism are competing for the same resources not benefiting either. Predation: One species benefits while the other does not |
| What will be discussed in Community Ecology? | Competition, Predation, Mutualism |
| Competition | the decrease in population growth rate caused by the limit in resources by another organism |
| Competition only occurs when ____. | Resources are limited |
| Is Oxygen a limited supply? | NO |
| DO we compete over Oxygen? | NO |
| What is not competition? | When you are sharing resources |
| Resources that species may be competing over | Food, Shelter, Light, Mates, Nutrients, Water, Space |
| Intraspecific Competition | Occurs between the memebers of the same species |
| Interspecific Competition | Occurs between the members of different species |
| Intra means | Within |
| Inter means | Out |
| Intraspecific Competition leads to what? | The slowing of the population growth rate when it reaches carrying capacity |
| At low densities the yeast population grows at a ____ rate. | High |
| At high densities, the yeast population... | Slows down and levels off |
| How can we detect competition in a lab? | Grow 2 species together and alone. Use two single-celled organisms |
| When they grow in different flasks is there any competition? | No |
| When they grown together in the same flask, is there competition? | Yes. Population begin to get smaller when they are together whether than alone |
| How can we detect competition in the field? | Compare behavior, growth of an individual, and population growth alone and with another species |
| Comparing behavior Example | Yellow Rumped Warble suffers competition with the Black-thoarted Green Warbler because they move their feeding zone upward. |
| What experiment can explain the growth of an individual? | Measure 2 Desmodium (wild flower) alone, together with other plants of its species, and together with plants of other species |
| What 2 Desmodium was measured | D. glutinosum and D. nudflorium |
| D. glutinosum decreased in leaf growth drastically by | Intraspecific Competition |
| D. nudflorium decreased in leaf growth drastically by | Interspecific competition |
| Result | Competition reduces leaf growth in both species |
| Another example of how can we detect competition in the field | Kangaroo rat VS. Small seed eater |
| Where do these species coexist? | Arizona desert |
| Do they compete? | Yes |
| Explain the K-rats and Small seed eaters experiment | If the K-rats are present, the small seed eaters population growth rate decreases. When the K-rats are taken out, Small seed eaters population increases drastically. |
| What about the insect eaters? Does the insect eaters and K-rats compete? | No because they have didn't resources for nutrients |
| How did the gather these results? Ideas? | Fenced a plot / Planted AL fencing so they couldn't dig / Cut holes in the fence so small rodents could enter except K-rats / tapped, counted, marked |
| What else can alter the outcome of the competition? | Physical environment and biological environment |
| Evolutionary effect of the competition Ex) body size and seed size | Small ground finches eat small seeds / Medium ground finches eat medium seeds |
| Is the ground finches example a Intra- or Inter- competition? | Interspecfic Competition |
| Conclusion of evolutionary effect | Overtime the competitive relationships between species will evolve (ground finches evolve beaks sizes) |
Created by:
animalsavior
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