Population Biotic Community

A. Diatoms
B. Najas
C. Zanichellia
D. Lemna

A. Phytoplanktons
B. Reed-swamps
C. Sedges
D. Floating plants

A. Human beings
B. Non-pathogenic microbes
C. Pathogenic microbes
D. Grazing animals

A. Eleocharis, Fimbristylis
B. Salix, Populus
C. Ranunculus, Polygonum
D. Acer, Ulmus

A. Hypnuma
B. Parmelia
C. Lecanora
D. Barbula

A. Pond freshly filled with water after a dry phase
B. Freshly cleared crop fields
C. Newly exposed habitat with no record of earlier vegetation
D. Forest clearing after devastating free

A. Climate
B. Soil organism
C. Bed rock
D. Pool of available nutrients

A. Genetic drift
B. Ecological succession trend
C. A food pyramid
D. A phylogenetic trend

A. Mangroves
B. Tropical evergreen forests
C. Temperate forests
D. Oceanic island communities

A. Greenlands
B. Savannahas
C. Deciduous forests
D. Tropical rain forest