Cozumel Island (birds, 2004 - 2007)
Basic information
Sample name: Cozumel Island (birds, 2004 - 2007)

Reference: H. Perdromo-Velázquez, E. Andresen, E. Vega, J. E. Schondube, and A. D. Cuarón. 2017. Effects of hurricanes on the understory forest birds of Cozumel Island. Tropical Conservation Science 10:1-14 [ER 3282]
Geography
Country: Mexico

State: Quintana Roo

Coordinate: 20° 26' N, 87° 53' W
Latlng basis: stated in text as range

Environment
Habitat: tropical/subtropical dry broadleaf forest

Protection: biosphere reserve

Substrate: ground surface

MAT: 25.5

MAP: 1505.0

Habitat comments: "semideciduous tropical forest... rainfall is highly seasonal"
the island is "included in UNESCO’s World Network of Biosphere Reserves"

Methods
Life forms: birds

Sites: 6

Sampling methods: line transect, mist nets

Sample size: 2504 captures or sightings

Years: 2004 - 2007

Days: 24

Seasons: winter, summer

Nets or traps: 9

Net or trap nights: 216

Basal area status: not applicable

Sampling comments: "Two times before the hurricanes and four times after- ward, understory forest birds were captured using mist nets (12 m in length, 2 m height, and 32 mm mesh size) in six sites (>500 m apart) within the area covered by semi-deciduous tropical forest... In each site, mist nets were placed along three parallel 72m long transects (3 x 72 m); distance between adjacent lines at each site varied between 13 and 29 m... During each of the six sampling periods, each site was sampled over 4 consecutive days. The first half of the three transects (3 x 36 m) were sampled simultaneously using a total of nine nets, during 2 days. Then, the nine nets were moved to the second half of the three transects for 2 more days of sampling. Nets were opened at sunrise and remained open for 6 hours... Sampling effort per site was 216 net hours in each sampling period"
sampling was during northern summer 2004, winter 2005, winter 2006, summer 2006, winter 2007, and summer 2007

Metadata
Sample no: 3637

Contributor no: John Alroy

Enterer: John Alroy

Created: 2020-05-27 14:21:58

Modified: 2020-05-27 04:21:58

Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
45 species
4 singletons
total count 2504
geometric series index: 59.5
Fisher's α: 7.791
geometric series k: 0.8544
Hurlbert's PIE: 0.7914
Shannon's H: 2.2401
Good's u: 0.9984
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