lu3a, lu3b Flashcards
The biomass of a tropical rainforest ecosystem is the total number of different species living in the ecosystem
false
biomass = total mass of living organisms within that ecosystem
biomass can be measured in terms of weight (grams, kilograms, tons, etc.) and represents the collective living matter in an ecosystem.
The number of different species in an ecosystem = biodiversity or species richness
food webs are much more simple, with less interconnected species and interactions within an ecosystem
false
in energy pyramid, the lowest level has more energy than the top level
true?
if a tree in an ecological pyramid have a total of 10,000 Kcal of energy, what is the total number of Kcal of energy the tertiary consume
10
it is common for a limited number of organisms to be present at the top of an ecological pyramid due to the energy transfer inefficiencies in the food chain.
true
Only a limited number of organisms can be supported at the top of an ecological pyramid. As energy is lost at each trophic level, there’s less energy available to support populations at higher levels, leading to smaller populations and often only a few top predators in an ecosystem.
during every energy transformation, some energy is dissipated into a less useful form, often in form of heat
true
during metabolic processes, this heat dissipates into the environment and isn’t available for the next trophic level.
a cold snap in the fall leads to a decrease in pond temperature. the cold temperature increased algae growth.
false
cold temp can slow down biological processes, including algae growth
algae growth typically slows or even stops in colder temperatures. so it’s unlikely increased.
carbon is cycled through ecosystems because it is continually recycled and reused, while energy flows through ecosystems and is lost as heat
true
a cold snap in the fall leads to a decrease in pond temperature. the cold temperature decreased phytoplankton growth.
true
colder temperatures tend to slow down their growth & reproduction rates
sensitive to temperature changes
a cold snap in the fall leads to a decrease in pond temperature. the cold temperature could lead to a decrease in herbivore populations.
false
