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The image features a line graph titled "Population of wild birds: 1970-2004" focusing on the United Kingdom, plotting indices for four bird population categories, depicted over the years 1970 to 2004. The vertical axis ranges from 50 to 140 (index = 1970 = 100), and the horizontal axis represents time. Each category's bird population is represented by a specific line: Coastal species (20 species), All species (111 species), Woodland species (33 species), and Farmland species (19 species). Initially, in 1970, all categories start at an index of 100. Patterns vary distinctly among categories through years:
1. Coastal species index shows a fairly steady increase, starting at 100 in 1970, dipping slightly in the early 1970s, then climbing gradually, reaching around 120 in 2004.
2. All species index begins at 100 in 1970, decreases slightly to below 100 by 1976, fluctuates mildly around this range, and ends near 100 again in 2004.
3. Woodland species index starts at 100 in 1970, exhibits some fluctuation, dipping to approximately 90 by mid-1970s, recovering to 100 by 1980, with slight rises and falls, ending just below 100 by 2004.
4. Farmland species index begins at 100, shows a sharp decline to about 60 by mid-1980s, and maintains a relatively flat trend but slightly recuperates, closing near 70 in 2004.
Given the complexity of the image, the above description may not be entirely accurate.
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Note: Both the topic and the answer were created by one of our users.
The graph represents the population of different fowls species in the United Kingdom from 1970 until 2004.
After 1973, the population of birds that located by the sea, was increasing every year with a maximum number in 2014 ,in contrast to the birds that lived to the firms.To be more specific since 1979 their number decreased to 55 species until 2014.It seems that the birds who lived by the forests, had small ups and downs until 1988 because after this year their population reduced nearly at the same rate (10 species). As far as it concerns the general rate of all species, the thirty four years of study revealed that there is both raise and reduction in the percentages but without any remarkable fluctuation.
It is obvious that birds who stayed in the land had a significant decrease with the past of time while in costal birds happens the exact opposite. This phenomeon could be explained by the fact that people affect the evolution of birds by hunting or construction. It is an emergency need to take measures so as to protect not only birds but other animals.
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