A Comparison of Methods for Estimating the Productivity of Zostera marina
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Because seagrass production significantly contributes to the biodiversity and production of coastal and estuarine ecosystems, accurate estimation of seagrass productivity is a critical step toward understanding the ecological roles of seagrass in these ecosystems. To develop an accurate and effective method of measuring seagrass productivity,we estimated leaf productivity of eelgrass (Zostera marina) on the southern coast of Korea using three methods, the conventional leaf marking method, the elongation-mass method (Short ’87 method), and the plastochrone method. In each season, shoots were pierced through the bundle sheath using a hypodermic needle and were collected after 2-4 weeks had elapsed to estimate their productivity. The leaf elongation and the leaf plastochrone intervals varied significantly among seasons. On an annual basis, the conventional leaf marking method showed the lowest leaf productivity estimates compared to the elongation-mass method and the plastochrone method, suggesting that the conventional leaf marking method underestimated leaf productivity as it ignored leaf maturation processes and new leaf growth within the sheath. Since the elongation-mass method considered leaf maturation processes, this method produced higher leaf productivity estimates than the conventional leaf marking method. On an annual basis, the plastochrone method produced the highest leaf productivity estimates. Below-ground productivity, which can be easily estimated using the plastochrone method, ranged between 3.29 and 5.73 (mg dry weight shoot-1 day-1) and accounted for about 17.8% to 30.3% of total productivity. Because of the high contributions of below-ground productivity to total seagrass production, we suggest that the plastochrone method is an effective and simple technique for assessing both above- and below-ground productivities.
Abstract
Because seagrass production significantly contributes to the biodiversity and production of coastal and estuarine ecosystems, accurate estimation of seagrass productivity is a critical step toward understanding the ecological roles of seagrass in these ecosystems. To develop an accurate and effective method of measuring seagrass productivity,we estimated leaf productivity of eelgrass (Zostera marina) on the southern coast of Korea using three methods, the conventional leaf marking method, the elongation-mass method (Short ’87 method), and the plastochrone method. In each season, shoots were pierced through the bundle sheath using a hypodermic needle and were collected after 2-4 weeks had elapsed to estimate their productivity. The leaf elongation and the leaf plastochrone intervals varied significantly among seasons. On an annual basis, the conventional leaf marking method showed the lowest leaf productivity estimates compared to the elongation-mass method and the plastochrone method, suggesting that the conventional leaf marking method underestimated leaf productivity as it ignored leaf maturation processes and new leaf growth within the sheath. Since the elongation-mass method considered leaf maturation processes, this method produced higher leaf productivity estimates than the conventional leaf marking method. On an annual basis, the plastochrone method produced the highest leaf productivity estimates. Below-ground productivity, which can be easily estimated using the plastochrone method, ranged between 3.29 and 5.73 (mg dry weight shoot-1 day-1) and accounted for about 17.8% to 30.3% of total productivity. Because of the high contributions of below-ground productivity to total seagrass production, we suggest that the plastochrone method is an effective and simple technique for assessing both above- and below-ground productivities.
참고문헌 (30)
- Bédhomme AL, "Mesure de la production primaire des feuilles de Posidonia oceanica: Modifications de la méthode de Zieman", Bot Mar, 26, pp.35~43 (1983)
- Blackburn TH, "Active mineral cycling in a Jamaican seagrass sediment", Mar Ecol Prog Ser, 110, pp.233~239 (1994)
- Brouns JJWM, "The plastochrone interval method for the study of the productivity of seagrasses: Possibilities and limitations", Aquat Bot, 21, pp.71~88 (1985)
- Dennison WC, "Leaf production. In RC Phillips", Seagrass Research Methods, Monographs on Oceanographic Methodology, 9, pp.77~79 (1990)
- Dennison WC, "Rhizome", root production. In Seagrass Research Methods, 1990, pp.9, 81~82
- Dennison WC, "Sediment ammonium availability and eelgrass (Zostera marina) growth", Mar Biol, 94, pp.469~477 (1985)
- Gaeckle JL, "A plastochrone method for measuring leaf growth in eelgrass, Zostera marina L", Bull Mar Sci, 71, pp.1237~1246 (2002)
- Heck Jr KL, "Composition, abundance, biomass, and production of macrofauna in a New England estuary – comparisons among eelgrass meadows and other nursery habitats", Estuaries, 18, pp.379~389 (1995)
- Holmquist JG, "Decapod and stomatopod assemblages on a system of seagrass-covered mud banks in Florida Bay", Mar Biol, 100, pp.473~483 (1989)
- Ibarra-Obando SE, "An improvement of the Zieman leaf marking technique for Zostera marina growth and production assessment", Aquat Bot, 47, pp.293~302 (1994)
- Jacobs RPWM, "Distribution and aspects of the production and biomass of eelgrass Zostera marina L., at Roscoff, France", Aquat Bot, 7, pp.151~172 (1979)
- Kemp M, "Primary productivity. In Seagrass Research Methods", pp.153~159 (1990), Monographs on Oceanographic Methodology
- Kentula ME, "The autecology and production dynamics of eelgrass (Zostera marina L.) in Netarts Bay", Oregon. Estuaries, 9, pp.188~99 (1986)
- 이근섭, "Production Assessment of Eelgrass, Zostera marina Using the Plastochrone Method Compared with the Conventional Leaf Marking Technique", Ocean Science Journal, 39(3), pp.186~196 (2004), 한국해양연구원
- Lee K-S, "Production dynamics of the eelgrass, Zostera marina in two bay systems on the south coast of the Korean peninsula", Mar Biol, 147, pp.1091~1108 (2005)
- McComb AJ, "The biology of Australian seagrass. In The Biology of Australian Plants", pp.258~293 (1981), University of Western Australia Press
- Montague CL, "A possible effect of salinity fluctuation on abundance of benthic vegetation and associated fauna in northeastern Florida Bay", Estuaries, 16, pp.70~717 (1993)
- Nienhuis PH, "Production and growth dynamics of eelgrass (Zostera marina) in brackish Lake Grevelingen (The Netherlands)", Netherlands J Sea Res, 14, pp.102~118 (1980)
- Park SR, "Production dynamics of three Zostera species on the southern coast of the Korean peninsula", 박사, pp.2008
- Park SR, "Current status and ecological roles of Zostera marina after recovery from large-scale reclamation in the Nakdong River estuary, Korea", Estuar Coast Shelf Sci, 81, pp.38~8 (2009)
- Patriquin D, "Estimation of growth rate, production and age of the marine angiosperm Thalassia testudinum König", Carb J Sci, 13, pp.1~2 (1973)
- Robertson AI, "Disturbance by ice and lifehistory adaptations of the seagrass Zostera marina", Mar Biol, 80, pp.131~141 (1984)
- Robertson EL, "Seagrasses. In The Marine Benthic Flora of Southern Australia Plant 1. South Australia", pp.57~122 (1984), Government Printer
- Roman CT, "Production ecology of eelgrass (Zostera marina L.) in a Cape Cod salt marsh–estuarine system, Massachusetts", Aquat Bot, 32, pp.353~363 (1988)
- Sand-Jensen K, "Biomass, net production and growth dynamics in an eelgrass (Zostera marina L.) population in Vellerup Vig, Denmark", Ophelia, 14, pp.185~201 (1975)
- Short FT, "Effects of sediment nutrients on seagrasses: Literature review and mesocosm experiment", Aquat Bot, 27, pp.41~57 (1987)
- Short FT, "Methods for the measurement of seagrass growth and production. In Global Seagrass Research Methods", pp.154~182 (2001), Elsevier
- Vizzini S, "The role and contribution of the seagrass Posidonia oceanica (L.) Delile organic matter for secondary consumers as revealed by carbon and nitrogen stable isotope analysis", Acta Oecol, 23, pp.277~285 (2002)
- Zieman JC, "Methods for the study of the growth and production of turtle grass, Thalassia testudinum König", Aquaculture, 4, pp.139~143 (1974)
- Zieman JC, "Quantitative and dynamic aspects of the ecology of turtle grass, Thalassia testudinum. In Estuarine Research, Vol. 1", pp.541~562 (1975), Academic Press