Ecological Succession Lab FA20.docx - Name_Laura Gauna...

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Name ________Laura Gauna________________ Ecological Succession Lab In this lab you will apply what you have learned about succession to the ecological changes that occur in an abandoned hay field. After only 5 years, several types of trees have begun to grow where there was once only hay. You will observe, by counting, the number and types of trees that grow in this field 5, 20, 50 and 100 years after abandonment, in both theunderstory and the canopy. Part 1:For each figure 1-6, count how many of each species of tree are found in the field, using the key as a guide. Add up all of the trees to find the total number of trees present in the field and calculate the percentage of each tree species at each observed time period. Figure 1: Understory and Canopy after 5 YearsSpeciesNumberof Trees% ofTotalYellow birch412Aspen 39Pin Cherry 721Blackberry 2059Sugar maple + 00Beech 00Total34Figure 2: Understory after 20 years. Conditons: July 1, Noon, air temperature: 75F, soil surface temperature: 84 F̊̊SpeciesNumberof Trees% ofTotalYellow birch526Aspen 211Pin Cherry 421Blackberry 421Sugar maple + 316Beech 15Total191
Figure 3: Understory After 50 years. Conditons: July 1, Noon, air temperature: 70F, soil surface temperature: 68FSpeciesNumberof Trees% ofTotalYellow birch429Aspen 429Pin Cherry 00Blackberry 00Sugar maple + 214Beech 429Total14Figure 4: Canopy After 20 YearsSpeciesNumberof Trees% ofTotalYellow birch524Aspen 629Pin Cherry 1152Blackberry 00Sugar maple + 00Beech 00Total21Figure 5: Canopy After 50 YearsSpeciesNumberof Trees% ofTotalYellow birch826Aspen 1032Pin Cherry 00Blackberry 00Sugar maple + 619Beech 723Total312
Figure 6: Canopy after 100 Years SpeciesNumberof Trees% ofTotal

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