Agriculture & Biology
algae
7%
Appalachian region
10%
Bacillariophyceae
7%
bacterioplankton
7%
biogeochemical cycles
8%
Chlorella vulgaris
9%
Ciliophora
19%
Columbia River
100%
Cyanobacteria
8%
dissolved oxygen
13%
estuaries
76%
growth performance
6%
indicator species
8%
iron
6%
isotope fractionation
45%
isotopes
10%
Mesodinium
17%
metabolism
8%
metformin
12%
methylmercury compounds
10%
nephelometry
13%
nitrates
32%
nitrogen
19%
nitrogen fixation
8%
nitrogen-fixing bacteria
9%
nitrogen-fixing cyanobacteria
11%
nutrients
9%
oceans
25%
organic matter
8%
oxygen
13%
oxygen isotopes
11%
Pacific Ocean
10%
particulate organic matter
14%
phosphorus
16%
photoperiod
7%
phylotype
10%
phytoplankton
25%
plankton
8%
pollution load
12%
polyphosphates
11%
rivers
13%
secondary productivity
11%
sediments
14%
sensors (equipment)
9%
Thalassiosira
6%
tides
12%
turbidity
11%
turgor
9%
underwater vehicles
14%
water
16%
Earth & Environmental Sciences
agricultural catchment
10%
alga
6%
algal bloom
20%
assimilation
16%
autonomous underwater vehicle
10%
cell
10%
ciliate
12%
cyanobacterium
15%
dissolved organic carbon
9%
dissolved organic matter
9%
estuary
57%
fixation
23%
fractionation
30%
global ocean
9%
in situ
10%
iron
7%
isotope
19%
metabolism
12%
methylmercury
9%
nitrate
33%
nitrogen
8%
nitrogen fixation
19%
nitrogen isotope
36%
North Pacific Ocean
9%
nutrient
11%
nutrient cycle
10%
ocean
12%
organic matter
7%
organism
6%
oxygen
6%
oxygen isotope
7%
particulate organic matter
10%
phosphorus
9%
phytoplankton
28%
plankton
7%
rate
13%
residence time
8%
rift zone
8%
river
38%
secondary production
10%
sediment
8%
sensor
16%
stable isotope
6%
tide
6%
turbidity
9%
vesicle
8%
water
8%
water column
6%