Barro Branco and Acará streams
Basic information
Sample name: Barro Branco and Acará streams
Sample aka: Adolfo Ducke Forest Reserve

Reference: C. Delgado. 2002. Spatial and temporal distribution patterns of Odonata larvae in the streams of a terra firma forest of the central Amazon, Brazil. Journal of Freshwater Ecology 17(4):555-561 [ER 1098]
Country: Brazil
State: Amazonas

Coordinate: 2° 57' 30" S, 59° 56' 30" W
Basis of coordinate: stated in text as range
Geography comments: "in two clear water streams, Barro Branco and Acará, in the Adolfo Ducke Forest Reserve"
coordinate is the midpoint of ranges stated in the text
Habitat: tropical/subtropical moist broadleaf forest
Protection: forest reserve
Substrate: lake bottom/stream bed
MAP: 2600.0
Habitat comments: "tall primary forest with a closed canopy"
Life forms: odonates
Sampling methods: no design, other nets
Sample size: 620
Years: 1995, 1996
Sampling comments: "Each sample area was divided into three sampling segments of equal length (upper, middle, lower). Three types of substrate were sampled: sand, litter, root. These are the most abundant and stable substrates of the stream bed. Six samples were taken monthly of each type of substrate totalling 216 samples for each stream. The sampler was a rectangular aquatic net (0.45 m x 0.29 m) with mesh of 1 mm2 , which was dragged over a surface of 0.25 m against the water flow" (counts are of larvae)
Sample: 1612
Contributor: John Alroy
Enterer: John Alroy
Created: 2015-05-29 20:57:12
Modified: 2015-05-29 20:57:12
Abundance distribution
24 species
1 singleton
total count 620
extrapolated richness: 25.6
Fisher's α: 4.963
geometric series k: 0.7979
Hurlbert's PIE: 0.8776
Shannon's H: 2.6007
Good's u: 0.9984
Each square represents a species. Square sizes are proportional to counts.