My paraphrased paragraph on wolves and livestock in USA

Hey there, this is my paraphrasing work of the below original text from the article found at http://www.jstor.org/stable/3566633

Original:
INTRODUCTION

The historical range of the gray wolf (Canis lupus) included most of North America where wild ungulates were abundant (Carbyn, 1987). European settlement along with the introduction of domestic livestock into these areas altered the relationship between wolves and their native prey. Across the contiguous United States, domestic livestock replaced or coexisted with native ungulates. Wherever wolves and livestock coexisted, wolf depredations on livestock occurred (Young and Goldman, 1944; Gunson, 1983; Tompa, 1983; Fritts et al., 1992). As a result, the threat of wolf predation on domestic livestock became one of the leading reasons for humans to eradicate wolves throughout the contiguous United States. By the middle of the 20th century, humans had successfully eradicated wolves from most of the contiguous United States, except for a single population in northeastern Minnesota.

The distribution of wolves in the contiguous United States began to increase during the latter half of the 20th century due to increasing public empathy (Mech, 1995).


My paraphrase:

North America has been the ancient home for the gray wolf (Canis lupus) and bountiful populations of wild ungulates (Carbyn, 1987). Settlers from Europe and the establishment of domestic livestock in these territories have changed the connection between wolves and their indigenous prey. Throughout the United States, range mammals such as cattle have displaced or appended with natural occurring ungulates. The despoiling of livestock due to wolves happens in any place where wolves and livestock exist together (Young and Goldman, 1944; Gunson, 1983; Tompa, 1983; Fritts et al., 1992). Because of this, the risk of losing further livestock to wolf predation had become the main reason why the United States wanted to eliminate wolves within the country. Aside from a little population of wolves found in northeastern Minnesota, Americans had effectively wiped out most populations throughout the United States by the mid-20^th century.

 

  The dispersion of wolves throughout United States had increased in numbers in the late half of the 20^th century because of the empathy of common American citizens (Mech, 1995).