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The basic premise of the initial transect presentations on this web site is of transects established linearly across a biological site (often through an environmental gradient). The measuring device used depends on the size of the site and the logistical constraints in putting it into place. It is envisioned that eventually transects ranging in size from a microscopic level to a satellite image level will appear here.

Note: to be useful for this project, all images contributed must have a reference measurement scale visible or the scale must be known so that it could be inserted into the pictures. Photos also need to be of good quality. It is also possible that accurate drawings could provide the image for a transect.

If you want to contribute to this project, you may use the following suggestions for collecting images and data .

CONTENTS

External Sites

Laboratory Based Sites

Horizontal and Vertical Transects

Contributing Your Transects to this Site

Procedures for Processing Images

Proceed to the Image file

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1. EXTERNAL SITES

  • Metric tape measures
    One meter (or lower increment) sticks, ropes, PVC pipes
    (A good size indicator for photographs is a stick of any designated length, painted white, with black electrical tape wound at measured stated intervals e.g. every 10 or 50 cm.)
  • Metric quadrats: full, 1/2, 1/4, 1/10 m
    It is imperative that whatever measuring device is used that it be clearly visible in all images that are presented of the site. Fractional intervals along the transect markers must also be visible

2. LABORATORY BASED SITES

Metric rulers
Stage and ocular micrometers
Linear and quadrat inscribed dishes and plates

3. HORIZONTAL AND VERTICAL TRANSECTS

Although most biological systems are perhaps best studied by the establishment of horizontal transects, there are some sites that can only be investigated by vertical transects into the system. These latter transects are best seen in mud and sand flat habitats where the inflora and infauna may only be investigated by taking vertical cores and dividing along a vertical transect, or on a cliff face or through a forest canopy. Vertical sites may also be established into and through systems such as plants and animals, or parts of organisms.

4. CONTRIBUTING YOUR TRANSECTS TO THIS SITE:

In order to collaborate with us in building this resource for transect investigations, you may do the following: If you are able to put your transect images on your own web site, just send us the URL and file location and we will designate a number reference and hyperlink it from our index of transects at this location. Or send your transect photo strips along with any additional information you can provide on physical factors or organism identification by e-mail to the following address:

Send comments to: Garry Fletcher

Be sure to include as much information as possible about the site. For example,

  • Temperature variations along the transect
  • Elevations
  • Measurements of sunlight intensity
  • Any other measurements that may help to relate abiotic effects to occurrence of organisms.
  • Information about the species that are visible in the transect. ( Identification, known associations, etc.). Photos, drawings or maps should be sent as picture files (.jpg or .jpg extensions), you may also send them as zipped files ( using pkzip) . Text materials can be sent as ordinary e-mail text files. (If it is possible to send text information already done in hypertext as a .htm file, that would be preferred.)

  • 5. PROCEDURES FOR PROCESSING IMAGES
    Proceed to the Image Files
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