Ecosystem Basics
____________ is organisms fighting over a resource like food or shelter
Competition
Biomes are defined by average annual_________ (2 answers)
temperature
precipitation
A __________ is a reservoir that take in more carbon than it releases
The main reservoir of the nitrogen cycle is the _________
atmosphere
Phosphorus lacks a _____________ reservoir
atmospheric
A relationship that benefits both organisms is called ___________
mutualism
Describe the type of soil that a tropical rainforest has.
nutrient poor
A __________ reservoir that releases more carbon than it takes in
Source
What drives biotic fixation of nitrogen?
soil bacteria
rhizobacteria
The largest reservoir of phosphorus is __________ and ___________
rocks
ocean sediment
___________ is a relationship that benefits one organism & doesn’t impact the other
Commensalism
____________ water holds more dissolved O2.
Colder
Flowing
Which cellular process releases CO2 into the atmosphere?
cellular respiration
N2 in the atmosphere is converted into __________ in the biotic fixation process.
ammonia NH3
ammonium NH4
fertilizer
detergents/cleaners
___________ is all living & nonliving things in an area (plants, animals, rocks, soil, water, air)
ecosystem
The shallow region of a lake with emergent plants is known as the _____________
littoral zone
_________ in the atmosphere is constantly exchanged with the dissolved __________ in the ocean. (same answer)
aerobic bacteria convert NH4 into nitrite (NO2-) & then nitrate (NO3 ) in which step of the nitrogen cycle?
nitrification
Eutrophication is excess nutrients fueling __________ growth.
algae
___________ is competition where species are using different areas of a shared habitat
Spatial partitioning
Roots of plants filter pollutants from water draining through is an example of an ecosystem service provided by _______________
wetlands
Cows primarily produce which greenhouse gas?
CH4
methane
bacteria in anaerobic conditions convert nitrate (NO3 ) into N2 gas in which step?
Denitrification
What is the equation for the amount of energy (biomass) leftover for consumers after plants have used some for respiration?
NPP=GPP - RL
net primary productivity = gross primary productivity - respiration