Readings in Wildlife ConservationJames Allen Bailey, William Elder, Ted D. McKinney Wildlife Society, 1974 - Всего страниц: 722 |
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Стр. 39
... types during the course of the four seasons . He pointed out that " ... the service rendered by any environ- mental type not only varies by species and season but is likely to be con- tained within a very small fraction of the type ...
... types during the course of the four seasons . He pointed out that " ... the service rendered by any environ- mental type not only varies by species and season but is likely to be con- tained within a very small fraction of the type ...
Стр. 348
... types ... Soil types are an extremely durable physical classification of land areas , and yet every rain , snow , sleet and drought and every act of man has left tell - tale traces in the physical - chemical composition of the soil ...
... types ... Soil types are an extremely durable physical classification of land areas , and yet every rain , snow , sleet and drought and every act of man has left tell - tale traces in the physical - chemical composition of the soil ...
Стр. 351
... type boundaries . When the soil types upon which a species occurs are identified the range of the species may be traced on a soils map . 5. The quantity , quality and distribution of water takes on a char- acteristic pattern for each soil ...
... type boundaries . When the soil types upon which a species occurs are identified the range of the species may be traced on a soils map . 5. The quantity , quality and distribution of water takes on a char- acteristic pattern for each soil ...
Содержание
PERSPECTIVES | 1 |
Thinking like a mountain | 9 |
Lost margins in the abandoned farm | 19 |
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Readings in Wildlife Conservation James Allen Bailey,William Elder,Ted D. McKinney Просмотр фрагмента - 1974 |
Часто встречающиеся слова и выражения
acres adult agencies animals annual areas Barbary sheep behavior big game biological biologists birds black-tailed deer breeding burning Canada Canada geese caribou carrying capacity changes chaparral conservation cost crop Dall sheep diversity ecological economic ecosystem effects environment example exotic experience factors farm fertility Fish and Game fish and wildlife forage forest game management geese goose groups grouse growth habitat harvest herd hunters hunting important increase individual kill land Leopold limited living mallards marshes ment method Mississippi Flyway moose mortality muskrats National Park natural organic Park Service percent plants population density prairie predation problem production quail recreation refuge reproductive result ruffed grouse season seed sharecropping shrubland social soil species sport square miles succession territory tion types ungulates unit vegetation waterfowl white-tailed deer wild Wildl wildlife management wildlife resources winter range wolf wolves