Question

7. The following excerpt is a communication from our Montrose dune steward "Leslie Born". Applying your knowledge of the dichotomy in community ecology theories, suggest a reason why these endangered "lover plover" birds have made a home here on Montroso dunes. "The weeks since our last workday have passed like a whirlwind and I have some exciting news to share. A pair of federally and state endangered Piping Plovers, a small, pale shorebird whose current Great Lakes population is estimated at only 67 breeding pairs, is nesting for the first time ever on Montrose Beach! Piping Plovers have been in our dune news all year, beginning with the hardy bird that arrived in fall 2018 and stayed for three months, breaking all records for late fall Piping Plovers in our region. This spring six different plovers stopped over during migration, and three of the birds recently started demonstrating territorial and courtship behavior. Two plovers, Monty and "Rose' (think "MontRose') have now paired up and established a nest on the main portion of Montrose Beach (the swimming beach between the dune habitat and dog beach). These two nested unsuccessfully at Waukegan last year, and three of those eggs were salvaged and hatched out by the Great Lakes Piping Plover Recovery Team in Michigan. Monty and Rose quickly became rock stars among Montrose birders, who are observing and documenting their every move. Monty is very aggressive in protecting his territory and chases off birds much larger, including Killdeer, Purple Martins, and even a Mallard Duck. Even before the nest was established, we reached out to Nilinois Department of Natural Resources (IDNR) and U.S. Fish & Wildlife Service (USFWS) staff and requested assistance in the event the plovers decided to nest. Once Rose chose one of Monty's 'scrapes,' the agencies moved in quickly to install sturdy protective fencing and educational signage. Now all of the major Chicago birding organizations have partnered to set up round the clock monitoring of the nest enclosure. Fencing off a portion of Chicago's largest and perhaps most popular public beach is no small challenge, but the Chicago Park District's Department of Natural and Cultural Resources didn't hesitate. As USFWS's Kris Lau says, "It takes a village." The Piping Plover nesting was a long time coming and the result of many factors - decades of restoration work to create a high quality dune ecosystem on Montrose Beach, successful advocacy to control the off leash dog traffic, and Lake Michigan's changing water levels resulting in frequent flooding and tide pools all over try beach which are attractive to shorebirds. Eventually, the birds were successfully rearing 4 chicks. Ans:

Answer 1

Answer-

Community dichotomy is basically the division of one community into two parts. Here community dichotomy and establishment of these endangered birds on Montrose dunes have occurred due to following reasons-

• Competition could be one of the proposed reason for such a new establishment. It can be assumed that birds have made home in this area to get better food resources.
• The constraints of migration could also be a possible reason for such establishment.