Population Growth and Dynamics: Terms and Concepts, Quizzes of Environmental Science

Download Population Growth and Dynamics: Terms and Concepts and more Quizzes Environmental Science in PDF only on Docsity! TERM 1 Population Growth DEFINITION 1 Change in population over time(birth + Immigration) - (Deaths + Emigration) = change in population TERM 2 Population Growth Rate DEFINITION 2 the amount the population has changed and divide it by the time it had to change TERM 3 Exponential Growth DEFINITION 3 In this growth, the population is doubling itself constantly within a set of time. This results in a J-curve graph. TERM 4 Carrying Capacity(K) DEFINITION 4 the maximum population of a species that a given habitat can support without being degraded over the long term TERM 5 Logistic Growth DEFINITION 5 Some processes can slow population growth so that it levels off at or near carrying capacity. This is represented by a S- Curve graph. TERM 6 Biotic Potential DEFINITION 6 number of offspring under ideal circumstances TERM 7 Environmental Resistance DEFINITION 7 The combination of all the biotic and abiotic factors that may limit a population's increase TERM 8 Reproductive Strategies DEFINITION 8 The interplay ofenvironmentalresistance and biotic potential drives the success of two common strategies, r and K. TERM 9 r-strategists DEFINITION 9 R-selected species produce massive numbers of young, but then leave survival to the whims of nature. They are characterized by rapid repoduction, rapid movement, and a short life span. They are opportunistic with boom bust populations TERM 10 K-strategists DEFINITION 10 They have a much lower reproductive rate (lower biotic potential), but then care for and protect their young. They work best in a stable environment and are characterized as larger, long lived, and well adapted to normal environmetalfluctuation. TERM 21 Mutualism DEFINITION 21 Relationship where both species are benefited+ + TERM 22 Amensalism DEFINITION 22 Relationship where one speciesaccidentallyharms another0 - TERM 23 Key Stone Species DEFINITION 23 a species that has a crucial role in maintaining ecosystem biotic structure. It moderates some species growth while allowing less competitive species to flourish as well. TERM 24 Resource Partitioning DEFINITION 24 the division of a resource andspecializationin different parts of it TERM 25 4 Key Variables for Survival DEFINITION 25 geographical distributionspecialization to a given habitat or food supplygenetic variation within the gene pool of the speciesreproductive rate relative to the rate of environmental change TERM 26 Selective Pressure DEFINITION 26 Pressures that affect which individuals survive and reproduce and which are eliminated