Utilization of nitrogen derived from seabird guano by terrestrial and marine plants at St. Paul, Pribilof Islands, Bering Sea, Alaska

Bird2

Birds are a group of warm-blooded vertebrates constituting the class Aves, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high…

Marine coastal ecosystem

A marine coastal ecosystem is a marine ecosystem which occurs where the land meets the ocean.

Marine food web

Compared to terrestrial environments, marine environments have biomass pyramids which are inverted at the base.

Madarak

طائر

Aves

Burung

鳥類

Ocells

Bird

Birds (class Aves or clade Avialae) are feathered, winged, two-legged, warm-blooded, egg-laying vertebrates.

Aves