Ecology and Habitats5/5: Ecology and Habitats Quiz Ecology & Habitats Quiz Which of these environmental factors can influence the formation of a habitat?*AltitudeRainfallTemperatureAll of the AboveHint: Think about the habitat zones of the Galapagos and how they differ in environmental conditionsIt is always possible to draw clear lines identifying where one habitat zone ends and another habitat zone starts.*TrueFalseHint: Think about how species from two neighbouring habitat zones will interactWhat does a food chain show?*A series of species that live in the same habitat but do not interactThe linear transfer of energy from producers to consumersDifferences in size between species within a habitatHint: Think about what happens between tropic levels in a food chainWhat happens to biomass through each stage of the food chain.*IncreasesDecreasesRemains the sameHint: Think about the difference between the total mass of all producers (such as trees) and all apex predators (such as hawks) within an ecosystemHow can biodiversity benifit an ecosystem?*Biodiversity can help to stabilise an ecosystemBiodiversity is an important factor in ensuring ecosystem healthThe more biodiverse an ecosystem, the less vulnerable it will be to fluctuation in keystone species populationsAll of the AboveHint: Biodiversity is the measure of the difference between the living organisms within an ecosystemWhich of these statements best describes a keystone species?*Keystone species are always apex predatorsIf a keystone species disappears, the entire ecosystem will change dramatically or collapseKeystone species are the largest and most numerous species in an ecosystemHint: Think about what would happen if the Galapagos giant tortoise was to disappear from the IslandsHow do Galapagos giant tortoises shape the environment they live in?*They disperse plant seedsThey trample plants, clearing areas for other speciesThey keep fast-growing plants under controlAll of the AboveHint: The Galapagos giant tortoise is a keystone speciesInvasive species pose the greatest threat to biodiversity in Galapagos.*TrueFalseHint: Invasive species in Galapagos include the hill raspberry, rats, goats and fire ants
