halimeda tuna reproduction

Compared to an older macroalgae dataset, dating back to 1973–1995, we found that some warm-affinity (summer) taxa became more dominant and cold-affinity (winter) species less dominant, while one once conspicuous species, Halimeda tuna, completely disappeared. Reefs of Florida and the Dry Tortugas: a guide to the modern carbonate environments of the Florida Keys and the Dry Tortugas. Biol. Leichter, J. J., S. R. Wing, S. L. Miller& M.W. Connaissances actuelles et contribution à l'étude de la reproduction et du cycles des Udotéacées (Caulerpales, Chlorophytes). M. Clifton, 1999. A. Coyer, C. L. Hunter, K. S. Beach& P. S. Vroom, 2002. These traits lead to potentially indefinite growth and plastic morphology that can respond to environmental conditions in various ways. 175: 105- 120. J. exp. Halimeda tuna is the type species of the genus Halimeda and the type locality is the Mediterranean Sea. Het komt voornamelijk voor in warme zeeën. Coral Reefs 6: 179- 186. The model SPREAD (SPatially-explicit Reef Algae Dynamics), which incorporates the key morphogenetic characteristics of clonality and morphological plasticity, is used to investigate the influences of light, temperature, nutrients and disturbance on the growth and spatial occupancy of dominant macroalgae in the Florida Reef Tract. Ecol. 41: 1490- 1501. Bot. Phycologia 8: 27- 35. Most (93%) eight-segment fragments of H. opuntia produced attachment rhizoids by the end of the 14-week trial. 184: 231- 244. Bot. Field surveys revealed that C. filiformis fragments were of variable morphologies (from small fronds to entire thalli) and sizes (0.1–60 cm in length). Université de Nice. J. exp. Limnol. Some species in the order Bryopsidales (Chlorophyta) are very successful at this type of propagation, although all members of this siphonous order are unicellular and multinucleate (for review, see Vroom and Smith, 2001). 27: 894- 907. J. Phycol. Littler, M. M., D. S. Littler, S. M. Blair& J. N. Norris, 1986. All fragments of C. filiformis were viable propagules that survived and grew well in the laboratory. We use cookies to help provide and enhance our service and tailor content and ads. The hydroids were most abundant from November to April when three cohorts, identified by size frequency, were present. We also reviewed published estimates of CaCO3 production rates in rhodolith-forming, coralline red algae from polar to tropical realms to place our findings within a global context. Ultimately, the long term success of C. filiformis fragments was low as only 1.6% of fragments attached within 24 h and none of these persisted for longer than 2 days. Some of the common ones encountered are: Gallery Halimeda algae plants do not do well with excessive pruning but will need a regular haircut. The length of these fragments ranged from 0.7 to 15.7 cm, but > 75% of the collected fragments were < 6 cm. Acceleration sensors based on centrally supported carbon-based flexural discs with different microfiber lengths, diameters and spatial configurations are investigated. Ecol. Specifically, we tested two hypotheses; (i) the fragment pool was unrelated to the structural complexity of Caulerpa beds and, (ii) fragment accumulation and retention was unrelated to canopy height of seagrass meadows. Ser. For H. tuna, survival was low in both the laboratory and field and did not differ with fragment size. Free-drifting fragments represent an abundant potential source of recruits to the invasive alga, Caulerpa taxifolia. Studies on Halimeda: I. Growth, survivorship, recruitment, and reproduction of Halimeda tuna, a dominant green alga in many reef systems of the Florida Keys, were monitored at a shallow back reef ( 4 - 7m) and deep reef slope ( 15 - 22 m) on Conch Reef. In July 2000 and July 2001, the majority (> 50%) of the algal fragment pool near Long Key was comprised of L. poiteaui. The morphology of macroalgae, particularly for H. tuna, had an effect on the rate and amount of space occupation, where larger and more upright forms were able to attain greater cover. Espèce : Halimeda tuna (J.Ellis & Solander) J.V.Lamouroux 1816, FR monnaie de poséidon, GB sea cactus alga Embranchement : Chlorophyta Classe : Ulvophyceae Ordre : Bryopsidales Famille : Halimedaceae Cette algue verte est légèrement calcifiée. mar. A novel oligoglycoside cucumarioside A8 with unprecedented hydroxy group at C-18 was isolated from sea cucumber Eupentacta fraudatrix and its structure elucidated. The overall stable macroalgal cover in the observed and simulated Florida Keys reefs permits other organisms, particularly hard corals, to capture space on the reef. Borowitzka, M. A.&A. Rapid rhizoid production in Halimeda discoidea Decaisne (Chlorophyta, Caulerpales) fragments: a mechanism for survival after separation from adult plants. Science 22: 57- 59. J. Phycol. However, fragment accumulation within ASUs was strongly affected by site, with the site experiencing the strongest tidal flows accumulating the most fragments. Cont. Dictyota spp. Little is known about the fate of small algal fragments (length: millimeters to a few centimeters) which are regularly generated by herbivores or disturbance events. Zool. Bot. Journal of Experimental Marine Biology and Ecology, https://doi.org/10.1016/S0022-0981(02)00335-0. Seasonal dynamics of macroalgal communities of the northern Florida reef tract. Studies have shown that with a good nutrition base they can actually double in growth in about 2-4 weeks. Biol. Bioturbators, known to affect sediment load, did not affect branch extension rate (0.541 mm y−1) or weight change (1.64 g y−1) of live, stained, or unstained rhodoliths. Winston, 1983, Winston and Jackson, 1984), hydroids (e.g. Palaeoclimat. Each individual thallus (frond) consists of a single cell forming a tube with multiple cell nuclei. Halimeda bioherms along an open seaway: Miskito Channel, Nicaraguan Rise, SW Caribbean Sea. Vroom, P. S., C. M. Smith& S. C. Keeley, 1998. Walters and Smith, 1994, Walters and Beach, 2000), boring organisms (e.g. Beach, K. S., L. J. Walters, C. M. Smith, J. Halimeda: paleontological record and palaeoenvironmental significance. Pulsed delivery of subthermocline water to Conch Reef (Florida Keys) by internal tidal bores. Part of Springer Nature. A szóban forgó moszatot zöld, elmeszesedett darabok alkotják. Borowitzka, M. A.&A. Bot. Lapointe, B. E., 1997. Fragment biomass was a positive function of the blade height and cover of Caulerpa taxifolia. Rijksuniversiteit Groningen founded in 1614 - top 100 university. 34: 351- 360. In sexual reproduction biflagellated gametes are produced in specialized globular to pyriform gametangia on simple or branched uncalcified stalks, which develop as outgrowths from nodes or the surface of segments. Late quaternary Halimeda bioherms and aragonitic faecal pellet-dominated sediments on the carbonate platform of the western continental shelf of India. Halimeda tuna was selected for initial model comparisons because the relatively untangled growth form permits detailed characterization in the field. (Paris) 275: 1363- 1365. Oceanogr. The action of metabolic inhibitors on photosynthesis andcalcification. Clifton, K. E., 1997. This allows configurations with small bending radii to be implemented, giving rise to high device compactness and potentially high responsivity. Sci. A. Coyer&C. 64: 428- 434. Shinn, E. A., B. H. Lidz, J. L. Kindinger, J. H. Hudson& R. B. Halley, 1989. mar. Growth and disturbance factors affect these characteristics and consequently their rate and amount of space capture. The exchange of Ca2+ and the occurrence of age gradients in calcification and photosynthesis. W. D. Larkum, 1976. 278: 47- 65. Breaking internal waves on a Florida (U.S.A.) coral reef: a plankton pump at work? The challenge of siphonous green algae. The latter net production rate was lower than carbonate production estimated from rhodolith biomass (g m−2) in the bed divided by calculated rhodolith age (based on branch extension rate and physical dimensions, 325.7 g CaCO3 m−2 y−1). Asexual propagation in the coral reef macroalga Halimeda (Chlorophyta, Bryopsidales): Production, dispersal and attachment of small fragments. Chemical defense and chemical variation in some tropical Pacific species of Halimeda (Halimedaceae; Chlorophyta). Walters, L. J.&C. Growth, survivorship, recruitment, and reproduction of Halimeda tuna, a dominant green alga in many reef systems of the Florida Keys, were monitored at a shallow back reef ( 4 - 7m) and deep reef slope ( 15 - 22 m) on Conch Reef. J. exp. Comparative resource use by juvenile parrotfishes in the Florida Keys. Hine, A. C., P. Hallock, M. W. Harris, H. T. Mullins, D. F. Belknap& W. C. Jaap, 1988. An ultrastructure study of plant development. 42: 63- 71. Drew, E. A.&K. Gross (806.1 g CaCO3 m−2 y-1) and net (196.2 g CaCO3 m−2 y−1) rhodolith CaCO3 production rates estimated from rhodolith weight change and rhodolith density (individuals m−2) in the bed were similar to those in European beds and lower than in subtropical and tropical beds. Nonetheless, the abundance and viability of fragments of C. filiformis available to attach suggest that asexual fragmentation is a successful reproductive strategy in this seaweed. Walters, L. J., C. M. Smith, J. Hydrobiologia Phosphorous and nitrogen in the Mediterranean Sea: specificities and forecasting. The technique of spirally wound microfiber for higher packing density is demonstrated. Variability in the ecophysiology of Halimeda spp. Stress-strain behavior of sur-ficial carbonate sediments from Key West, Florida, U.S.A. Mar. Halimeda cuneata 7 was recovered as closest sister to the H. discoidea 2–3 group in the plastid tree but as closest sister of the H. hummii–tuna clade in the nuclear phylogram. Borowitzka, M. A.&A. Ser. Rhodolith minimum age estimates ranged from 35.8 y (based on use of the branch extension method), to 37.9 y (gross weight change) to 115.1 y (net weight change), indicating that different methods can under- or over-estimate age by up to three times. Reef to basin sediment transport using Halimeda as a sediment tracer, Grand Cayman Island,West Indies. Mar. However, vegetative fragmentation has only been documented for H. discoidea in a laboratory setting. Pizzimenti, P. B.&A. We examined fragment accumulation and retention using artificial seagrass units (ASUs) mimicking seagrasses with long (20 cm) leaves (Posidonia/Zostera) and short (5 cm) leaves (Halophila spp.). Contribution à l'étude des Caulerpales (Chlorophytes). Blair, S. M.&J. Szmant, A.M.&A. 160: 191- 203. J. exp. Dispersal distances for rejected bites ranged from 0 to 31 m. Water motion was also responsible for fragment dispersal; experimentally produced fragments moved up to 48 cm day−1. U.S. Geological Survey, St Petersburg, FL. The cytoplasm is mobile and the nuclei, chloroplasts and other cell contents are free to move around inside the cell wall . Phycologia 19: 110- 138. Mar. Palaeogeogr. Reproduction in the calcareous green algae of coral reefs. Seventeen species of Halimeda have been grown in the laboratory in an open-circuit seawater cascade during a 6 year period. Ecol. Excursions. Sluiten. I. Littler, M. M., D. S. Littler, S. M. Blair& J. N. Norris, 1985. Ballesteros, E., 1991. Ecol. Multer, H. G., 1988. Pollut. Sort by Lm Country Locality tm: Lm (cm) Length (cm) Age range (y) tm (y) Sex of fish Country Locality; Search for more references on maturity: Scirus. Halimeda are green algae from the phylum Chlorophyta and are classified in the order Bryopsidales along with Caulerpa. J. exp. Siphonous, green macroalgae of the genus Halimeda are ubiquitous and ecologically important in tropical and subtropical marine environments. Wilbur, K. M., L. Hillis-Colinvaux& N. Watabe, 1969. Biol. For example, 83% of bites were rejected by the blue-striped grunt. Photoinhibition in the Mediterranean green alga Halimeda tuna Ellis et Sol measured in situ. M. Abel, 1988a. It owes its name to the Taino term 'tuna', which means cactus, in reference to the way in which this species grows. Ecol. The phenology of sexual reproduction by green algae (Bryopsidales) on Caribbean coral reefs. A three-dimensional agent-based model SPREAD (Spatially-explicit Reef Algae Dynamics) was used to explore these potential consequences under a range of growth and disturbance conditions, and to investigate the particular conditions leading to variations of these macroalgae in the inshore patch and offshore reefs in the Florida Reef Tract. It has been documented in all three algal divisions (e.g. Even with the more prolific growth forms, space occupation was still limited. Fish bite marks were evident on 75-85% of the individuals of H. tuna and the number of bites per thallus ranged from 1 to 23. Guarded parking with wide surveillance 24 hours, with car valet available every day. Temporally, these macroalgal populations in the studied reefs appeared to be stable overall with seasonal increases and decreases, as was shown possible in the model, observed in the field, and supported in the literature. We encourage forming a network of long-term, multi-site ecological monitoring programs in the Mediterranean to improve our understanding of ecosystem change and to enable making better predictions at the basin scale. Laboratory experiments were conducted at the NOAA/National Undersea Research Center facility in Key Largo. From April to October the population consisted of two cohorts, except in June and July when the population density was low and only one cohort, of young hydroids, … Wefer, G., 1980. Biologist. Electron microscope study of calcification in the alga Halimeda (order Siphonales). shelf Sci. mar. Limnol. mar. Herbivorous reef fish commonly fed on all three species of Halimeda. Reproduction of 17 species of Halimeda from a range of sites on the Great Barrier were studied in situ and experimentally in the laboratory: 202 fertility events were monitored over a 6-year period. To test the hypothesis that vegetative fragmentation contributes to field populations of Halimeda, we examined three aspects of fragmentation by H. tuna (Ellis and Solander) Lamouroux, H. opuntia (Linneaus) Lamouroux and H. goreaui Taylor on Conch Reef in the Florida Keys: (1) short-term (8 days) and long-term (14 weeks) fragment survival and rhizoid production in the laboratory and field (7 and 21 m), (2) size of the fragment pool and (3) influences of herbivory and water motion on production and dispersal of fragments. Menu en zoeken; Contact; My University; Student Portal Nat. Attachment success of L. poiteaui fragments was high in both laboratory and field (95.5% and 88.2%, respectively). J. exp. H. Goddard, 1978. L. Miller, 1999. 116: 25- 44. 27: 864- 878. The sources of inorganic carbon for photosynthesis and calcification and a model of the mechanism of calcification. In the marine environment, fragmentation via fission may be an endogenous part of the life-history of an organism (e.g. The distribution and species composition of Halimeda meadows throughout the Great Barrier Reef province. Deep Sea Res. We are especially grateful for the tremendous day boat and Aquarius support while working at the NURC Florida Keys research program; Dr. S. Miller, C. Cooper, O. Rutten, D. Ward and the entire NURC staff made our work much more efficient and productive. Limnol. To better understand fragmentation, and ultimately recruitment of L. poiteaui, we examined fragment: 1) accumulation rates, 2) variability, 3) dispersal distances, and 4) attachment rates. Immediate online access to all issues from 2019. Bach, S. D., 1979. Overall, a range of 4.7-9.4 fragments of Halimeda m(-2) day(-1) were found on Conch Reef, most fragments were generated by H. goreaui. How important are fish herbivory and water motion to fragment production and dispersal? Halimeda tuna is a species of calcareous green seaweed in the order Bryopsidales.It is found on reefs in the Atlantic Ocean, the Indo-Pacific region and the Mediterranean Sea. Calcification in the green alga Halimeda IV. Nonetheless, specific local conditions and the timing of macroalgae seasonal increases can impact the spatial spread of other benthic organisms. 1R and S) can be recognized by relatively small wedge-shaped to discoid segments and rather small subperiph-eral utricles typically bearing three peripheral utricles (Hillis-Colinvaux, 1980). Field biology of Halimeda tuna (Bryopsidales, Chlorophyta) across a depth gradient: comparative growth, survivorship, recruitment, and reproduction Coral Reefs 6: 263- 269. The model species, Halimeda and Dictyota spp., are modular organisms, with an “individual” being made up of repeating structures. Gametangia are produced on the surface or the margins of segments in H. incrassata (Ellis) Lamouroux, H. tuna (Ellis et Solander) Lamouroux and Act. et al. J. Phycol. N. Norris, 1988. ). This may have arisen from variability in light and nutrient availability. It is characterized by the formation of stems up to 20 cm high, formed by fragments in the form of kidney-shaped and flat discs up to 2.5 cm in diameter, linked together. Despite lower light intensities and similar grazing pressures, amphipod infestations, and epiphyte loads at both sites, the deeper site exhibited significantly higher growth rates in summer months over a 4-year period than found for the shallow population, possibly because of higher nutrient levels at depth and photoinhibition of shallow plants. Acta 14: 581- 588. Dawes, D. J.&R. 29: 191- 201. Learn more about Institutional subscriptions. By continuing you agree to the use of cookies. Kilar and McLachlan (1986) found that 43–93% of fragments. Growth, survivorship, recruitment, and reproduction of Halimeda tuna, a dominant green alga in many reef systems of the Florida Keys, were monitored at a shallow back reef (4–7m) and deep reef slope (15–22 m) on Conch Reef. It has been hypothesized that the abundance of Halimeda on coral reefs is in part due to the ability of this genus to propagate asexually via vegetative fragmentation. Earlier research established that asexual fragmentation is the predominant mode of reproduction in this benthic drift macroalga, yet no studies documenting post-fragment success have been published to date. ), or exogenously via disturbance or predators (e.g. Dawes, C. J.&E. However, some fragments grew more than others, in particular larger sizes (7.5 cm class) of certain morphologies (fragments that consisted only of a single frond). The rate of attachment of fragments was also fast, usually within 12 h, but the longer these fragments were attached to a substratum the greater the force required to dislodge them. Miller, M.W., M. E. Hay, S. L. Miller, D. Malone, E. E. Sotka& A. M. Szmant, 1999. L. Van Alstyne, 1992. Ecol. Activation of chemical defenses in the tropical green algae Halimeda spp. Häder, D. P., M. Porst, H. Herrmann, J. Schäfer& R. Santas, 1996. Plants appear to have persistent basal stumps that survive harsh environmental conditions, even if upright, photosynthetic axes are removed. [4] Fragments may be created endogenously, as part of an organism's life history (e.g. Back to Search. Field biology of Halimeda tuna (Bryopsidales, Chlorophyta) across a depth gradient: comparative growth, survivorship, recruitment, and reproduction. Rao, V. P., M. Veerayya, R. R. Nair, P. A. Dupeuble& M. Lamboy, 1994. 166: 83- 97. If fertilization and recruitment of sexually produced individuals are not successful for this taxa over the long-term, asexual reproduction via vegetative fragmentation may contribute substantially to populations. Mshigeni, 1978, Kilar and McLachlan, 1986, Santelices and Varela, 1994, Trowbridge, 1998, Smith and Walters, 1999, Beach and Walters, 2000, Ceccherelli and Piazzi, 2001). Halimeda is a genus of green macroalgae.The algal body is composed of calcified green segments.Calcium carbonate is deposited in its tissues, making it inedible to most herbivores.However one species, Halimeda tuna, was described as pleasant to eat with oil, vinegar, and salt. bloom and its impact on Halimeda tuna at Conch Reef, Florida Keys. Both hypotheses were rejected. These species can also propagate asexually through clonal fragmentation. Calcification in the green alga Halimeda II. Menu en zoeken; Contact; My University; Student Portal Oliver, 1984, Wilson, 1985) and macroalgae (e.g. Menu en zoeken; Contact; My University; Student Portal Mass spawning by green algae on coral reefs. Download : Download full-size image; Fig. Asexual reproduction via fragmentation is an integral component of the life history of many marine organisms. Clifton, K. E.&L. Gametangial clusters of Halimeda vary in size, shape, and position on the segment. Although all three tested fragment lengths (2, 4, and 6 cm) of L. poiteaui were successful at attaching to the provided substrata, often times the smaller (2 cm) fragments were the most successful (as seen in Section 3.3.2) and attached significantly faster than larger fragments (6 cm).While the difference in attachment rates between the 2 and 6 cm fragments may be small, this variation could potentially be the difference between recruiting or not recruiting (Smith and Hughes, 1999; Walters et al., 2002).The presence of a terminal apical tip did not influence the attachment success of fragmented L. poiteaui (Fig. 177: 177- 187. Reproductive phases in populations of Halimeda tuna in the Bay of Naples. Shulman, M. J.&D. Photochem. Williams, S. L., 1988. 33: 881- 892. Ecol. Stn. Borowitzka, M. A.&A. https://doi.org/10.1023/A:1026287816324, DOI: https://doi.org/10.1023/A:1026287816324, Over 10 million scientific documents at your fingertips, Not logged in Biol. The macroalgal species, Halimeda tuna, Halimeda opuntia, and Dictyota sp., are modular and clonal organisms that have the capability for morphological plasticity and asexual reproduction through fragmentation. Ser. Biomass and production of two Halimeda species in the Southwest New Caledonian lagoon. Bethoux, J. P.&G. Here we examine how this fragment pool interacts with real and artificial habitat structure in estuarine environments. Ecol. We used a 378-day manipulative experiment in a subpolar Newfoundland rhodolith bed to: (1) quantify and compare gross and net rhodolith CaCO3 production rates; (2) compare production estimates derived from branch extension and weight change methods; and (3) test the hypothesis that bioturbators increase rhodolith branch extension [growth] and CaCO3 production. Fragments that are produced as an integral part of an organism's life history are predicted to have high survivorship, whereas fragments produced by biotic or abiotic factors may or may not be able to survive and grow clonally. Individuals growing at 7 m received a 29% greater PFD in August 2001 than in 1999. The tufA sequences showed that Mediterranean H. tuna represents a single, well It is remarkable that very small fragments of any marine algae can survive wounding, attach to the substratum, and continue to grow. Wulff, 1985, Wulff, 1991, Maldonado and Uriz, 1999), bryozoans (e.g. (2006) on Dictyota species.Dictyota in the model does not refer to a particular species since the light response curve was obtained from Dictyota cervicornis (Yñiguez, 2007), while the other parameter values were obtained from literature values for various Dictyota spp. Acad. Oecologia 118: 471- 482. 42: 1119- 1131. Am. 1). Ass. H. Moore, 1988. Seasonality of growth and production of a deep-water population of Halimeda tuna (Chlorophyceae, Caulerpales) in the North-western Mediterranean. Napoli Publ. Deepest known plant life discovered on an uncharted seamount. Individual variability in growth rate and the timing of metamorphosis in yellowtail flounder Pleuronectes ferrugineus. Photobiol. S. Vroom (in review). ASUs with structure had greater fragment accumulation than controls, but we did not detect differences between ASUs of different canopy heights. Sur le cycle de l'Halimeda tuna (Ellis et Solander) Lamouroux (Udotéacée, Caulerpale). We investigated the genetic diversity of the green alga Halimeda tuna based on two plastid markers (tufA gene and a newly developed amplicon spanning 5 ribosomal protein genes and intergenic spacers, the rpl2‐rpl14 region). Mar. Interannual shifts in community structure were driven mostly by sharp fluctuations in a few dominant native and alien species and the regional mass mortality of an Indo-Pacific mussel in summer 2016. The microfiber used in the designs has diameters of 2 and 10 μm. Oceanogr. 89: 524- 531. H. tuna achieved higher cover at low disturbances. Hughes, T. P., D. C. Reed& M. J. Boyle, 1987. Coral Reefs 6: 227- 236. Between 2009 and 2017, we seasonally and annually monitored the spatiotemporal community dynamics at 11 sites on the rocky shores of the southeastern Mediterranean, focusing on the understudied intertidal vermetid reef ecosystem. Rijksuniversiteit Groningen founded in 1614 - top 100 university.

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