. Animal Ecology. Animal ecology. Environmental resistance; Biotic potential Stabilized ) population level. Population growth curve: dt -TIME- FIG. 16-4 Relation between blotic potential and environmental resistance in determining the population level attained by a tion and amount of competition involved. With 7 pairs of bay-breasted warblers on a 10-hectare plot (25 acres), the average size of territories was 3157 m^ ( acre). On another plot with 18 pairs the territories averaged 1740 m- ( acre) ; on a plot with 25 pairs, 1497 m- ( acre) ; and on a plot with 42 pairs, only 1174 m^
. Animal Ecology. Animal ecology. Environmental resistance; Biotic potential Stabilized ) population level. Population growth curve: dt -TIME- FIG. 16-4 Relation between blotic potential and environmental resistance in determining the population level attained by a tion and amount of competition involved. With 7 pairs of bay-breasted warblers on a 10-hectare plot (25 acres), the average size of territories was 3157 m^ ( acre). On another plot with 18 pairs the territories averaged 1740 m- ( acre) ; on a plot with 25 pairs, 1497 m- ( acre) ; and on a plot with 42 pairs, only 1174 m^ ( acre) (Kendeigh 1947). With decrease in size of territories, however, comes intensification of competitive singing, scolding, chasing, and fighting. On a 6-hectare (15 acre) area there were no instances of destruction of nests, eggs, or young in the six years through which the popula- tion of male house wrens did not exceed 11, but dur- ing the 13 years when such acts of destruction did occur, the male population had ranged from 11 to 16 (Kendeigh 1941b). A pair of birds requires a spe- cific minimum territory for successful nesting. When an area becomes saturated with territories compressed to this limited size, disturbances occur in nesting and other individuals attempting to invade the area are forced to go elsewhere. Thus the population density becomes limited by the space available. On the other hand, with species possessing only undefended home ranges, competition for space is of less critical im- portance in regulating population Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kendeigh, S. Charles (Samuel Charles), 1904-. Englewood Cliffs, N. J. , Prentice-Hall
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectanimalecology
