SS1.10 Marine Protected Areas: Critical tools for Marine Biodiversity Conservation
Date: Monday, June 10, 2002
Time: 4:45:00 PM
Location: Esquimalt
 
BlakewayD, California State University, Los Angeles, USA, dblakew@calstatela.edu
Robles, C, D, California State University, Los Angeles, USA, crobles@calstatela.edu
Fuentes, D, , California State University, Los Angeles, USA, dfuentes@calstatela.edu
Qiu, H, L, California State University, Los Angeles, USA, hqiu@calstatela.edu
 
SEHRI: SPATIALLY EXTENSIVE HIGH RESOLUTION IMAGES OF ROCKY INTERTIDAL COMMUNITIES
image
We present a method for acquiring spatially extensive (>> 100 m2) high resolution (< 1 cm) images of the cover of rocky shore communities. A hand-held pole with a 35 mm camera atop takes overlapping pictures from normal or oblique angles. Using recently developed desktop software, digital renderings of the photographs are assembled into a nearly seamless composite image. We illustrate the utility of this image by (1) combining it with other sources of data into a layered GIS database, (2) analyzing the scales of patchiness of different species using semivariograms, and (3) georectifying earlier panoramic photos with the SERHI to make historical comparisons. We suggest that SEHRI are appropriate when the aim is to (1) archive detailed records of the community composition of a location (2) make post hoc analyses of the community, or (3) compare spatial patterns at different scales. Conducting environmental impact assessments and validating spatially explicit population models share these goals.