Sampling Description
Mylar leaf mimic arrays were placed within Thalassia testudinum seagrass meadows for 63-75 days to approximate the seagrass leaf turnover period. Leaf mimics were then retrieved and epiphyte load and epiphyte light transmission was measured at locations along the length of the seagrass leaf mimics. Determination of epiphyte load versus light transmission relationships on Thalassia testudinum.Mylar leaf mimic arrays placed within seagrass at study sites.
Method Step
Description
Total epiphyte load measured as dry weight, light transmission measured on intact submerged samples using Light Attenuation Measurement Apparatus (Stankelis et al., 2003)
References:
Stankelis, R. M., Naylor, M. D., & Boynton, W. R. (2003). Sumberged aquatic vegetation in the mesohaline region of the Patuxent estuary: Past, present, and future status. Estuaries, 26, 186-195.
Instrumentation
LICOR LI-1000 light meter, LICOR 192SA quantum sensor
Method Step
Description
Seagrass leaf productivity (Zieman, 1974; Zieman and Fourqurean, 1989)
References:
Zieman, J. C. 1974. Methods for the study of the growth and production of turtle grass, Thalassia testudinum Konig.. Aquaculture, 4: 139-143.
Zieman, J. C. , J. W. Fourqurean, R. L. Iverson. 1989. Distribution, abundance and productivity of seagrasses in Florida Bay.. Bull. Mar. Sci., 44: 292-311.
Instrumentation
None
Quality Control
Data-entry checked visually. Balances routinely calibrated, light sensors sent to LICOR, Lincoln, Nebraska for calibration.