ESTABLISHING A NEW TRANSECT LINE [for a new rather than revisited site]
A. Establishing quadrat heights at 1.0, 1.5, 2.0, 2.5, 3.0, 3.5 m intervals above 0 tide level [intervals might be adjusted for local areas with larger or smaller tide range]
Personnel: 2-- 2 survey rod holders
Equipment: 2 rods, sight level, data forms, tide tables, calculator, flagging tape with weight
B. Establishing position of the 3.5m quadrat site relative to landmarks
- Lay out line from above high tide mark to waters edge and perpendicular to the shore [keep to left of line; allow extra line at lower end to extend line as the tide falls]
- In front of current year's tide table guide find secondary port closest to station location.
- Note time and height corrections IN FEET for LARGE low tide and LARGE high tide
- Calculate predicted tide height at time of survey per station work sheet [This requires use of Table 6 and 6A in the front of the tide tables]
- Determine the difference between the present predicted tide height and the next higher quadrat [e.g., if present predicted water height is 1.3m, then next higher quadrat is 1.5 = 0.2m higher]
- Hold one survey rod at the waters edge; count DOWN the no. of decimeter marks from the top of the SECOND survey rod until = the difference calculated in 5 [e.g. 0.2m or 2dm]
- Move second rod upshore until you estimate that you are at the next quadrat location
- Hold site level next to the decimeter mark established in 6 [e.g. 2dm]
- Sight through the level and rotate up or down until the bubble is CENTRED on horizontal line in the level
- Note position of this line on the FIRST rod. If it is below the top of the rod you need to move up; if it is above the rod, you need to move down-- until just at top of rod [NOTE: where the horizon line or shoreline is more than 1/2 mile away use THIS rather than the site level as line to locate just at the top of the first rod. This is easier and more accurate than the site level]
- Place weighted flagging tape at this point at base of 2nd rod
- Bring first rod up place at point on transect where second rod located
- Count down 0.5m or 5dm on second rod; move up beach until estimate that you are 0.5 above the first rod
- Repeat sighting adjustments [as in 8-10] until at correct height
- Place second weight at base of second rod
- Repeat until up to 3.5m [or whatever interval you have chosen]
- You may need to complete establishment of lower quadrat point when tide as lowered to below 1.0 meters
Personnel: 4: persons: 3 tape holders incl. reader, recorder/photographer
Equipment: 2 100 m tapes, sighting compass, camera, flagging tape, 3x5 cards, felt pen
C. Establishing position of transect
- Make up 3x5 card: for station no.& transect letter e.g., 4A/96 take close-up photo of this card [2-3ft.]; check off on sta. sheet
- select two moderately separated shore points which are likely to be permanent. Ideally they should each be at about a 45 degree angle to the transect line.
- One person hold the reels of the two 100 m tapes reels at the 3.5m mark while the other two each pull a tape to the selected landmarks [these 2 persons should carry a compass and flagging tape with them].
- On the Transect form note:
- distance from BOTH the left and right landmarks to the 3.5m quadrat point
- Compass bearings [uncorrected for declination] FROM the left and right landmarks TO the 3.5m quadrat point.
- Hold flagging tape at each landmark while person 4 takes photos 2 to 5.
- Temporarily leave tapes in place for establishing transect [below]
Personnel: 4 persons: 2 tape holders, reader, recorder/photographer
Equipment: 2 100 m tapes, 1 50 m tape, sighting compass, camera, flagging tape
D. Determining slope of transect
- Extend 50 m tape from 3.5 m marker seaward along the transect line be sure 0 point on metric side of tape is at the 3.5m point
- One person hold the reels of the two 100m tapes at some point along the transect between the 2.0 and 2.5 m levels [referred to below as the “halfway” point]
- On the Transect form note:
location of the halfway point in meters ALONG the transect line
- distance from the left and right landmarks to the halfway point
- compass bearing FROM left and right landmarks to the halfway point
- compass bearing DOWN transect toward sea
- Also on the transect form note the location of the flagging tape weights from the 3.5m level [0.0meters] down to the 1.0m level [the lower most determinations may have to be deferred until the tide is below the 1.0m level.
- Take photos 6 - 11 per station sheet
- Reel up the 100 m tapes.
E. Placing primary & secondary quadrats [team divided into 2 pairs]
- Lay survey rod along slope between the 3.0 and 3.5m levels along transect
- Place the angle finder on top of the rod
- Read slope angle in degrees and record on transect sheet
- Repeat steps 1-3 for slope between 1.5 and 2.0m levels along transect [an angle reading on a protractor held on top of a level may be estimated if an angle finder is not available]
Personnel: 2 persons Equipment: quadrat frame, dowels, 1/4" polypropylene rope ring
- These will be placed AS data are collected
- Put in dowel legs on quadrat frame
- For Primary quadrats place each frame with LOWER LEFT OUTSIDE corner [facing] landward] on flagging tape at 3.5 and 3.0 meters with left side parallel to 30 m tape [hang plumb bob from outer corner to the flagging tape weight for accuracy]
- For Secondary quadrats place rope ring in approximate square at same level as quadrat frame and 2-3 meters to left of transect facing landward.
- AFTER completing photos and counts place NEXT pair of frames at 1.5 and 1.0 meters [during period of lowest tide]
- Finish up with frames at 2.5 and 2.0 meters.