Research Article

Landscape Pattern Impacts on the Population Density and Distribution of Black Shama (Copsychus cebuensis Steere) in Argao Watershed Reserve, Argao, Cebu, Philippines

Table 2

List of landscape variables.

Habitat variablesReferencesMethods of measurement

(1) Physical features
(a) Altitude/elevationBibby et al. [6]GPS receiver
(b) Slope gradientBibby et al. [6]Abney hand level
(c) AspectBibby et al. [6]Compass
(d) Distance/nearest streams/riversBibby et al. [6]Spatial Analyst (GIS)
(2) Human disturbance
(a) Dist. from sampling site to forest edge/roadSpatial analyst (GIS)
(b) Dist. from sampling site to a nearest village/communitySpatial analyst (GIS)
(c) Dist. to agriculture/cultivationSpatial analyst (GIS)
(3) Vegetation structures
(a) Total height (TH)Bibby et al. [6]Haga
(b) Diameter at breast height (DBH)Bibby et al. [6]/Rosli et al. [7]Diameter tape
(c) Canopy densityBibby et al. [6]Densitometer
(d) BA of trees/ha Bibby et al. [6]Computation/equation
(e) Tree density/haRosli et al. [7]/Posa and Sodhi [8]Computation/equation
(f) % shrub/herb coverRosli et al. [7]/Posa and Sodhi [8]Computation/equation
(g) Number of treesRosli et al. [7]/Posa and Sodhi [8]Ocular observation
 (g.1) Diameter classesFrequency/counts
 (g.2) Height classesTally/counts
(h) Presence and absence of bamboo thicketsKennedy et al. [9]Tally/counts
Occular observation
(i) Diversity index ( )Shannon-Weaver [10](1 presence; 0 absence)
Evenness index value
(4) Microclimate
(a) TemperatureRosli et al. [7]/Posa and Sodhi [8]Digital-min/max
thermohygrometer
(b) Relative humidity Rosli et al. [7]/Posa and Sodhi [8]EasyViewDigital Light
(c) Light intensity Rosli et al. [7]/Posa and Sodhi [8]Meter-Model EA30