algae

algal

and

aquatic

bacteria

biology

bluegreen

color

contaminated

covered

cyanobacteria

cyanophyta

develop

dirt

ecology

environment

environmental

flora

flow

freshwater

green

grow

growth

harmful

lake

lakes

microbiology

microscope

natural

nature

organic

organism

outdoor

photosynthesis

photosynthetic

plankton

planktonic

plant

plants

polluted

pollution

pond

river

rivers

scum

seasonal

slime

slimy

slow

summer

surface

swamp

swamps

toxic

unhealthy

vegetation

water

wetlands

which