منابع مشابه
Demography of Elder Population in Iran Over the Period 1956 To 2006
Objectives: Ageing and its consequences at the onset of the third millennium is becoming one of the major population-related issues in all countries. Methods & Materials: At present, Iran is undergoing a population transformation from a young age structure to an old age one. Although at the time being the elderly population (60 years and over) is rather small proportion of total population, ...
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Abstract. One of the most urgent policy issues related to the COVID-19 pandemic in Europe concerns the extent and ways in which demographics have determined different patterns of mortality between groups and regions, and whether and how the pandemic and its economic consequences will affect population dynamics in the future. Post-pandemic policy evaluations on the spread of COVID-19 and the im...
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Numerous pedicellate and sessile Trillium species are endemic to eastern North America, where white-tailed deer (Odocoileus virginianus) populations have been growing in recent decades. Deer feed on Trillium plants, and because they often consume all leaves and flowers, the photosynthetic capacity of browsed plants is greatly diminished. To determine if deer can influence Trillium population dy...
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African forest elephants face severe threats from illegal killing for ivory and bushmeat and habitat conversion. Due to their cryptic nature and inaccessible range, little information on the biology of this species has been collected despite its iconic status. Compiling individual based monitoring data collected over 20 years from the Dzanga Bai population in Central African Republic, we summar...
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"Projecting populations that have sparse or unreliable data, such as those of many developing countries, presents a challenge to demographers. The assumptions that they make to project data-poor populations frequently fall into the realm of ¿educated guesses', and the resulting projections, often regarded as forecasts, are valid only to the extent that the assumptions on which they are based re...
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ژورنال
عنوان ژورنال: Journal of Ecology
سال: 2016
ISSN: 0022-0477,1365-2745
DOI: 10.1111/1365-2745.12547