Bio 373 Ecology Name Firstname Lastname Sara Goloborodko Pre class worksheet November 24 2020 Pre class worksheets are open book open notes open anything posted on our Canvas website and open spell checker please but must be your own independent work Before Michigan was settled it had pine forests These forests burned every 100 yr Pine seedlings which require bright sun germinated after these fires and the forests regrew The forests were logged 1840 1900 But the forests that regrew after logging were dominated by deciduous hardwoods like maples which do not burn Maple seedlings can grow in the shade maintaining this community Based on this information write the correct letter s in the left hand table cells 1 C 1 This story is an example of A primary succession B restoration ecology in action C alternate stable states 2 B 2 Before 1800 community dynamics in this region were an example of A a climax community B succession set back by repeated disturbances C facilitation For questions 3 5 write either PS primary succession SS secondary succession or NS not an example of succession at all in the left hand cells Select the single best fitting answer for each question 3 PS 3 the sequence of communities that follows a clearcut if there is no re planting or other site manipulation clearcut all trees are cut down and removed from a site 4 SS 4 the sequence of communities that follows the planting of trees after a clearcut 5 NS 5 the sequence of communities in the 100 years following a hurricane if there is no re planting or other management interventions Write T true or F false in the left hand cells 6 T 6 Europe has fewer species of most taxa than eastern North America does probably because mountains blocked southward migration in Europe during glacial periods 7 F 7 North and South America share many taxa because they were both once part of the continent of Gondwana 8 T 8 Alders facilitate the colonization of recent glacial deposits by other plant species because alders have nitrogen fixing symbiotic bacteria