Ecological investigations of the tundra Ecological investigations of the tundra biome in the Prudhoe Bay region, Alaska . ecologicalinvest00brow Year: 1975 12 20 17 13 18 25 5 June July Aug a. Numbers of birds counted (all species) by date and row of census plot. > LlI or Lake Shore: Before 20 June After 20 June b. Schematic cross section of Plot B, showing approximate ele- vation above lowest point on the east margin of the plot. Fig. 3. Spatial and temporal patterns of avian abundance, Plot B, Prudhoe Bay, 1971.

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