depends what animal it is but usually it has little effect
Populations of certain areas are likely to increase rapidly while other areas become sparsely populated. This may put a strain on resources in certain areas while in others resources are not fully exploited.
Population decreases
Three causes of human migration are economic opportunities, political instability, and environmental factors. Three effects of human migration include cultural diversity, demographic changes, and strain on resources in receiving countries.
The movement of humans into a population is called migration.
Human Geography
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The study of the characteristics of human population is called demography. It typically involves the analysis of factors such as birth rate, death rate, migration, and age distribution within a population.
What two effects of the migration of people through Africa
Sidney Goldstein has written: 'Techniques for analysis of the interrelations between migration and fertility' -- subject(s): Fertility, Human, Human Fertility, Internal Migration, Migration, Internal, Statistical methods 'Population projections, Rhode Island cities and towns, 1970 and 1980' -- subject(s): Population 'Migration and rural development' -- subject(s): Rural-urban migration, Rural development 'Jews on the move' -- subject(s): Identity, Internal Migration, Jews, Migration, Internal, Migrations 'The demography of Bangkok' -- subject(s): Population, Rural population 'Metropolitanization and population change in Rhode Island' -- subject(s): Population 'Migration in Thailand' -- subject(s): Internal Migration, Migration, Internal, Population 'Residential displacement and resettlement of the aged' -- subject(s): Relocation (Housing), Dwellings, Older people 'The people of Rhode Island, 1960' -- subject(s): Population 'The influence of labor force participation and education on fertility in Thailand' -- subject(s): Women, Birth control, Education, Employment
ducks
because when somebody is born it effects it and it will increase in size. More people are in the world than Eva before. As more people come into this world it effects it. If somebody dies then the population will greatly decrease.
migration
Shekhar Mukherji has written: 'The mobility field theory' -- subject(s): Marginality, Social, Population policy, Psychological aspects, Psychological aspects of Rural-urban migration, Rural-urban migration, Social Marginality 'Poverty-induced migration and urban involution in India' -- subject(s): Internal Migration, Migration, Internal, Research, Rural-urban migration, Urbanization 'Migration and Urban Decay:' 'The demographic field theory' -- subject(s): Population policy, Demographic surveys 'Poverty and fertility in India' -- subject(s): Fertility, Human, Human Fertility, Mathematical models, Population, Poverty 'Poverty and mobility in India' -- subject(s): Case studies, Poor, Rural-urban migration, Labor mobility