Seedlings; seagrass; elemental analysis; nutritional contrainsts; sexual reproduction
Abstract :
[en] Successful seedling establishment is rare in Posidonia oceanica. The first year after germination is likely to be the most critical phase in the recruitment process, but little is still known on the factors affecting seedling survival. Mature fruits of P. oceanica released from a meadow of the north-western Mediterranean were deposited by currents on the adjacent beach in May 2004. In May and December 2005, some seedlings established in the previous summer were uprooted by storms and deposited on the beach. This material provided the opportunity to examine seed mass and nutrient content, and the nutritional status of seedlings. Our findings support the hypothesis that growth limitation may be an important cause of mortality for seedlings during the first year of establishment in poor-nutrient sites.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège University of Pisa
Ågren J (1989) Seed size and number in Rubus chamaemorus: between-habitat variation, and effects of defoliation and supplemental pollination. J Ecol 77:1080-1092
Alberto F, Correira L, Arnaud-Haond S, Billot C, Duarte CM, Serrão E (2003) New microsatellite markers for the endemic Mediterranean seagrass Posidonia oceanica. Mol Ecol Notes 3:253-255
Alcoverro T, Duarte CM, Romero J (1995) Annual growth dynamics of Posidona oceanica: contribution of large-scale versus local factors to seasonality. Mar Ecol Prog Ser 120: 203-210
Alcoverro T, Romero J, Duarte CM, López NI (1997) Spatial and temporal variations in nutrient limitation of seagrass Posidonia oceanica growth in the NW Mediterranean. Mar Ecol Prog Ser 146:155-161
Alcoverro T, Manzanera M, Romero J (2000) Nutrient mass balance of the seagrass Posidonia oceanica: the importance of nutrient retranslocation. Mar Ecol Prog Ser 194: 13-21
Alcoverro T, Manzanera M, Romero J (2001) Annual metabolic carbon balance of the seagrass Posidonia oceanica: the importance of carbohydrate reserves. Mar Ecol Prog Ser 211:105-116
Balestri E (2004) Flowering of the seagrass Posidonia oceanica in a north-western Mediterranean coastal area: temporal and spatial variations. Mar Biol 145:61-68
Balestri E, Bertini S (2003) Growth and development of Posidonia oceanica treated with plant growth regulators: possible implications for meadow restoration. Aquat Bot 76: 291-297
Balestri E, Cinelli F (2003) Sexual reproductive success in Posidonia oceanica. Aquat Bot 75:21-32
Balestri E, Lardicci C (2008) First evidence of a massive recruitment event in Posidonia oceanica: spatial variation in first-year seedling abundance on a heterogeneous substrate. Estuar Coast Shelf Sci 76:634-641
Balestri E, Piazzi L, Cinelli F (1998a) Survival and growth of transplanted and natural seedlings of Posidonia oceanica (L.) Delile in a damaged coastal area. J Exp Mar Biol Ecol 228:209-225
Balestri E, Piazzi L, Cinelli F (1998b) In vitro germination and seedling development of Posidonia oceanica. Aquat Bot 60:83-93
Balestri E, Vallerini F, Lardicci C (2006) A qualitative and quantitative assessment of the reproductive litter from Posidonia oceanica accumulated on a sand beach following a storm. Estuar Coast Shelf Sci 66:30-34
Ballesteros E (1989) Production of seaweeds in Northwestern Mediterranean marine communities: its relation with environmental factors. Sci Mar 53:357-364
Belzunce M, Navarro RM, Rapoport HF (2005) Seed and early plantlet structure of the Mediterranean seagrass Posidonia oceanica. Aquat Bot 82:269-283
Bonfil C (1998) The effects of seed size, cotyledon reserves, and herbivory on seedling survival and growth in Quercus rugosa and Q. Laurina (Fagaceae). Am J Bot 85:79-87
Buia MC, Mazzella L (1991) Reproductive phenology of the Mediterranean seagrasses Posidonia oceanica (L.) Delile, Cymodocea nodosa (Ucria) Aschers., and Zostera noltii Hornem. Aquat Bot 40:343-362
Diaz-Almela E, Marbà N, Álvarez E, Balestri E, Ruiz-Ferñndez JM, Duarte CM (2006) Pattern in seagrass (Posidonia oceanica) flowering in the Western Mediterranean. Mar Biol 148:723-742
Diaz Almela E, Marbà N, Álvarez E, Santiago R, Martínez R (2008) Patch dynamics of the Mediterranean seagrass Posidonia oceanica: implications for recolonization process. Aquat Bot 89:397-403
Duarte CM (1990) Seagrass nutrient content. Mar Ecol Prog Ser 67:201-207
Duarte CM, Sand-Jensen K (1990) Seagrass colonization: patch formation and patch growth in Cymodocea nodosa. Mar Ecol Prog Ser 65:193-200
Duarte CM, Sand-Jensen K (1996) Nutrient constraints on establishment from seed and on vegetative expansion of the Mediterranean seagrass Cymodocea nodosa. Aquat Bot 54:279-286
Foster SA (1986) On the adaptive value of large seeds for tropical moist forest trees: a review and synthesis. Bot Rev 52:260-299
Gobert S, Lejeune P, Lepoint G, Bouquegneau JM (2005) C, N, P concentrations and requirements of flowering Posidonia oceanica shoots. Hydrobiologia 533:253-259
Hocking PJ, Cambridge ML, McComb AJ (1980) Nutrient accumulation in the fruits of two species of seagrass, Posidonia australis and Posidonia sinuosa. Ann Bot 45: 149-161
Hootsmans MJM, Vermaat JE, van Vierssen W (1987) Seedbank development, germination and early seedling survival of two seagrass species from The Netherlands: Zostera marina L. and Zostera noltii Hornem. Aquat Bot 28:275-285
Houssard C, Escarré J (1991) The effects of seed weight on growth and competitive ability of Rumex acetosella from two successional old-fields. Oecologia 86:236-242
Invers O, Pérez M, Romero J (2002) Seasonal nitrogen speciation in temperate seagrass Posidonia oceanica (L.) Delile. J Exp Mar Biol Ecol 273:219-240
Jover MA, Del Castillo-Agudo L, Garcia-Carrascosa M, Segua J (2003) Random amplified polymorphic assessment of diversity in western Mediterranean populations of the seagrass Posidonia oceanica. Am J Bot 90:364-369
Krannitz PG (1997) Variation in magnesium and nitrogen content in seeds of antelope bitterbrush (Purshia tridentata, Rosaceae). Am J Bot 84:1738-1742
Kuo J, Kirkman H (1996) Seedling development of selected Posidonia species from southwest Australia. In: Kuo J, Phillips RC, Walker D, Kirkman H (eds) Seagrass biology: proceedings of an international workshop. Rotnest Island, Western Australia, p 57-64
Lepoint G, Millet S, Dauby P, Gobert S, Bouquegneau JM (2002) Annual nitrogen budget of the seagrass Posidonia oceanica as determined by in situ uptake experiments. Mar Ecol Prog Ser 237:87-96
Lord JM (1994) Variation in Festuca novae-zelandiae (Hack.) Cockayne germination behaviour with latitude of seed source. NZ J Bot 32:227-235
Matthies D (1990) Plasticity of reproductive components at different stages of development in the annual plant Thalaspi arvense L. Oecologia 83:105-116
Mazer J (1989) Ecological, taxonomic and life history correlates of seed mass among Indiana dune angiosperms. Ecol Monogr 59:153-175
McKee J, Richards AJ (1996) Variation in seed production and germinability in common reed (Phragmites australis) in Britain and France with respect to climate. New Phytol 133:233-243
Mehlman DW (1993) Seed size and seed packaging variation in Baptisia lanceolata (Fabaceae). Am J Bot 80:735-742
Migliaccio M, Di Martino F, Silvestre F, Procaccini G (2005) Meadow-scale genetic structure in Posidonia oceanica. Mar Ecol Prog Ser 304:55-65
Milberg P, Lamont BB (1997) Seed/cotyledon size and nutrient content play a major role in early performance of species on nutrient-poor soils. New Phytol 137:665-672
Naegle ER, Burton JW, Carter TE, Rufty TW (2005) Influence of seed nitrogen content on seedling growth and recovery from nitrogen stress. Plant Soil 271:329-340
Navarro L (1996) Fruit-set and seed weight variation in Anthyllis vulneraria subsp. vulgaris (Fabaceae). Plant Syst Evol 201:139-148
Nielsen S, Pedersen MF (2000) Growth, photosynthesis and nutrient content of seedlings and mature plants of Cymodocea nodosa - the importance of clonal integration. Aquat Bot 68:265-271
Obeso JR (1993) Seed mass variation in the perennial herb Asphodelus albus: sources of variation and position effect. Oecologia 93:571-575
Olesen B, Sand-Jensen K (1994) Demography of shallow eelgrass (Zostera marina) populations - shoot dynamics and biomass development. J Ecol 82:379-390
Pate JS, Dell B (1984) Economy of mineral nutrients in sandplain species. In: Pate JS, Beard JS (eds) Kwongan: plant life of the sandplain. University of Western Australia Press, Nedlands, p 227-252
Pérez M, Romero J, Duarte CM, Sand-Jensen K (1991) Phosphorus limitation of Cymodocea nodosa growth. Mar Biol 109:129-133
Pérez M, Duarte CM, Romero J, Sand-Jensen K, Alcoverro T (1994) Growth plasticity in Cymodocea nodosa stands: the importance of nutrient supply. Aquat Bot 47:249-264
Piazzi L, Acunto S, Cinelli F (1999) In situ survival and development of Posidonia oceanica (L.) Delile seedlings. Aquat Bot 63:103-112
Robertson AJ, Mann KH (1984) Disturbance by ice and life history adaptations of the seagrass Zostera marina. Mar Biol 80:131-141
Seiwa K, Kikuzawa K (1991) Phenology of tree seedlings in relation to seed size. Can J Bot 69:532-538
Si.Di.Mar. (Sistema Difesa Mare) (2005). Programma per il monitoraggio per il controllo degli ambienti marinocostieri. Ministero dell'Ambiente e Tutela del Territorio. www.sidimar.tutelamare.it
Simons AM, Johnston MO (2000) Variation in seed traits of Lobelia inflate (Campanulaceae): sources and fitness consequences. Am J Bot 87:124-132
Susko DJ, Lovett-Doust L (2000) Patterns of seed mass variation and their effects on seedling traits in Alliara petiolata (Brassicaceae). Am J Bot 87:56-66
Terrados J (1993) Sexual reproduction and seed banks of Cymodocea nodosa (Ucria) Aschers. Meadows on the southeast Mediterranean coast of Spain. Aquat Bot 46: 293-299
Tomlinson PB (1982) Anatomy of the monocotyledons VII. Helobiae (Alismatidae). Claredon Press, Oxford
Tyler G, Zohlen A (1998) Plant seeds as nutrient resources for seedlings-a comparison of plants from calcareous and silicate soils. Ann Bot 81:455-459
Vaughton G, Ramsey M (1998) Sources and consequences of seed mass variation in Banksia marginata (Proteaceae). J Ecol 86:563-573
Vaughton G, Ramsey M (2001) Relationships between seed mass, seed nutrients, and seedling growth in Banksia cunnighamii (Protaceae). Int J Plant Sci 162:599-606
Vidondo B, Duarte CM (1995) Seasonal growth of Codium bursa, a slow-growing Mediterranean macroalga: in situ evidence of nutrient limitation. Mar Ecol Prog Ser 123: 185-191
Walker DI, Campey ML, Kendrick GA (2004) Nutrient dynamics in two seagrass species, Posidonia coriacea and Zostera tasmanica, on Success Bank, Western Australia. Estuar Coast Shelf Sci 60:251-260
