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level: Level 1 of Populations in eco systems

Questions and Answers List

level questions: Level 1 of Populations in eco systems

QuestionAnswer
PopulationAll the organism of one species found in that habitat
Communityall the organisms of all the species found in that habitat
Eco systemthe community plus biotic and non biotic factors
speciesorganisms that share similiar dna and can reproduce to make fetile off spring
Species richnessthe number of different species found in that habitat
biotic factorsliving
non bioticdead
nichethe role of the organism in that habitat
IntRAspecific competitoncomp between individuals of the SAME species
IntERspecific competitioncomp between individuals of DIFFERENT species
Adaptationincrease survival chance
stable popa population without a net increase or decrease in numbers over time
Population densitythe number of individuals per unit area
carrying capacitythe max stable pop an eco system can maintain
Predator prey cyclePrey increases due to unlimited food source so they is ENERGY to reproduce and as they prey aren't eaten the pop increases. AFTER a short delay predators pop increases as they is now a larger food source so less intraspecific comp This increase leads to prey pop to decrease as they are higher number of predators to eat prey so more being killed. as a result of less prey they is a smaller food source so more intraspecific comp
Grid method trigger wordsGrid Co ord Count Mean Whole area
Grid methodGrid - lay over map Co ord - gather 20 co ordinates . random number generator (avoid bias , increase represenative ) Count - place quadrat at coordinates and count no of plants in Mean - calculate mean no of plants in each quardat/ divide by tot no of quadrat Whole area - total area/ sampled area x mean no of plants in each
Transect trigger wordsTransect Quadrat Count Repeat Calculate Repeat
Transect methodTransect - set up at a right angle to location Quadrat - Place quadrat at reg intervals along the line Count - the amount or % cover Repeat - 3 times to be able to calculate a mean so add all mean's divide by 3
Mark release capture trigger wordsCatch Mark Release Recapture marked/non marked Equation N1 X N2 / M2
Trigger words for successionsPioneer species change ( environmental conditions) next species ( less hostile) repeat climax