Aerial photography habitat analysis (Nymphalidae)

Knowledge graph centered on Aerial photography habitat analysis (Nymphalidae) with 20 nodes and 70 connections. Top connected: Ligusticum porteri, Spruce, phenological mismatch, Lepidoptera, space use.

Method synopsis

Analysis of high-resolution aerial photography to quantify conifer cover around host plants using color thresholding and spatial buffering techniques.

Synthesized from method descriptions across 1 paper using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Oviposition behavior and offspring performance in herbivorous insects: consequences of climatic and habitat heterogeneity (2010), Oikos. Implementations in other papers (listed below) may differ.

1. Determine conifer cover
   Used 2006 aerial photograph of the site to estimate conifer cover associated with larval host plants. The orthocorrected color image had spatial grain < 1 m² and contained three data layers (red, green, blue). Judged all pixels in the image with red value ≤ 45 (on scale of 0-255) to be conifer-covered. Calculated the proportion of conifer-covered pixels within a 5-m radius of each point where L. involucrata was found.
   Quantities: 299 L. involucrata plants within study site, 5-m radius measurement area per plantDuration: Single analysis using 2006 aerial photographConditions: Analysis conducted using 2006 aerial imagery
   Equipment: 2006 aerial photograph with <1 m² spatial resolution, GIS software for spatial analysis

Typical Equipment

• 2006 aerial photograph with <1 m² spatial resolution
• GIS software for spatial analysis

Output Measurements

• conifer cover percentage
• spatial habitat structure

Papers Using This Protocol (1)

Species Studied With This Protocol