Biod 171 Exam 4
biomass Answer- total mass of organisms in a given area or volume
above ground biomass Answer- total biomass above ground of living plant material
primary productivity Answer- amount of carbo
...
Biod 171 Exam 4
biomass Answer- total mass of organisms in a given area or volume
above ground biomass Answer- total biomass above ground of living plant material
primary productivity Answer- amount of carbon fixed by photosynthesis per unit area per time
species richness has the biggest effect
disturbance Answer- natural disaster, logging, etc
affects the populations of interacting species that are independent of their densities
tend to be unpredictable
remove some organisms from habitat but provide opportunities for others
categorized by intensity and frequency of event
opens niches
community is more prone to invasion after
primary succession Answer- appearance of a new habitat
follows the destruction of the soil community
slow process, starts from bare rock
needs soil formation, so breaks down rock
establish microbial community
accumulation of organic matter and colonization of plans
secondary succession Answer- occurs after a disaster if soil community is still present
first, pioneering species grows, then more species begin to be added to the community
microbiome Answer- all the microorganisms living in association with an organism
bacteria, archaea, fungi, viruses
various functions in humans: provides barrier to invasion by pathogens, assist with digestion and nutrition, train and educate cells of immune system
3000+ species
get from mother, affected by mode of birth
affected by genetics
biodiversity Answer- many different kinds of organisms in one community
human uses include aesthetic value, crops and livestock, medicines, ecosystem services, materials and design ideas
[Show More]