You entered the population of foxes and the population of hares and watched as the computer slowly calculated the interaction between the two as the food supply and
predator population cycled around each other.
Not exact matches
Global loss of vagility alters a key ecological trait of animals that affects not only
population persistence but also ecosystem processes such as
predator - prey interactions, nutrient
cycling, and disease transmission.
Knowing that researchers in the early 20th century had shown that avian
predators can wipe out an entire
population of cicadas that emerges out of sequence, Koenig decided to take a look at how bird
populations might affect the insects»
cycles.
When both species are evolving, the traditional
cycle may reverse, allowing
predator populations to peak before those of the prey.
Populations of
predators and their prey usually follow predictable
cycles.
«Evolution in species may reverse
predator - prey
population cycles.»
And then, using data collected by other scientists on three
predator - prey pairs — mink - muskrat, gyrfalcon - rock ptarmigan and phage - Vibrio cholerae — they show how their theory could explain unexpected
population cycles.
Specification points covered are: Paper 2 Topic 1 (4.5 - homeostasis and response) 4.5.1 - Homeostasis (B5.1 lesson) 4.5.3.2 - Control of blood glucose concentration (B5.1 lesson) 4.5.2.1 - Structure and function (B5.2 lesson) Required practical 7 - plan and carry out an investigation into the effect of a factor on human reaction time (B5.2 lesson) 4.5.3.1 - Human endocrine system (B5.6 lesson) 4.5.3.4 - Hormones in human reproduction (B5.10 lesson) 4.5.3.5 - Contraception (B5.11 lesson) 4.5.3.6 - The use of hormones to treat infertility (HT only)(B5.12 lesson) 4.5.3.7 - Negative feedback (HT only)(B5.13 lesson) Paper 2 topic 2 (4.6 - Inheritance, variation and evolution) 4.6.1.1 - sexual and asexual reproduction (B6.1 lesson) 4.6.1.2 - Meiosis (B6.1 lesson) 4.6.1.4 - DNA and the genome (B6.3 lesson) 4.6.1.6 - Genetic inheritance (B6.5 lesson) 4.6.1.7 - Inherited disorders (B6.6 lesson) 4.6.1.8 - Sex determination (B6.5 lesson) 4.6.2.1 - Variation (B6.9 lesson) 4.6.2.2 - Evolution (B6.10 lesson) 4.6.2.3 - Selective breeding (B6.11 lesson) 4.6.2.4 - Genetic engineering (B6.11 lesson) 4.6.3.4 - Evidence for evolution (B6.16 lesson) 4.6.3.5 - Fossils (B6.16 lesson) 4.6.3.6 - Extinction (B6.16 lesson) 4.6.3.7 - Resistant bacteria (B6.17 lesson) 4.6.4.1 - classification of living organisms (B6.18 lesson) Paper 2 topic 3 (4.7 - Ecology 4.7.1.1 - Communities (B7.1 lesson) 4.7.1.2 - Abiotic factors (B7.1 lesson) 4.7.1.3 - Biotic factors (B7.1 lesson) 4.7.1.4 — Adaptations (B7.2 lesson) 4.7.2.1 - Levels of organisation (feeding relationships +
predator - prey
cycles)(B7.3 lesson) 4.7.2.1 - Levels of organisation (required practical 9 -
population sizes)(B7.4 lesson) 4.7.2.2 - How materials are
cycled (B7.5 lesson) 4.7.3.1 - Biodiversity (B7.7 lesson) 4.7.3.6 - Maintaining Biodiversity (B7.7 lesson) 4.7.3.2 - Waste management (B7.9 lesson) 4.7.3.3 - Land use (B7.9 lesson) 4.7.3.4 - Deforestation (B7.9 lesson) 4.7.3.5 - Global warming (B7.9 lesson)
Describe and interpret
predator - prey
cycles Explain how and why ecologists use quadrats and transects Required practical 9: measure the
population size of a common species in a habitat.
Some amphibians had been forced to adapt to eons of climate change
cycles that naturally dried up lakes and rivers, as well as an increasing
populations of
predators.
«In a
predator - prey
cycle, such as mice and weasels or hares and lynx, the reason why
populations go through periodic booms and busts has nothing to do with any external clocks,» he writes.»