Association with vessel vectors

Actual evidence of being found in samples in a particular vector from any world region.

Anchor and anchor chains. Organisms found on anchors, anchor chain or within attached sediments, including anchor chain lockers.

Ballast water. Ballast water means water with its suspended matter taken on board a ship to control trim, list, draught, stability or stresses of the ship.

Biofouling. Biofouling means the accumulation of aquatic organisms such as micro-organisms, plants, and animals on surfaces and structures immersed in or exposed to the aquatic environment. Biofouling can include microfouling and macrofouling.

  • Macrofouling means large, distinct multicellular organisms visible to the human eye such as barnacles, tubeworms, or fronds of algae.
  • Microfouling means microscopic organisms including bacteria and diatoms and the slimy substances that they produce.
Biofouling comprised of only microfouling is commonly referred to as a slime layer.

Sea chest. The sea chests are cavities (an opening with protection grid) at the bottom side of the ships’ hull (an opening for pumping in and out water for, e.g., ballasting, firefighting) where aquatic organisms may settle and be transported.

Tank sediments. Matter settled out of ballast water within a ship.

Bioaccumulation association

Natural toxins. An organism that accumulates toxins naturally produced by other organisms, such as phytotoxins, in its tissues.

Anthropogenic chemical compounds. An organism that accumulates human-produced chemicals, such as pharmaceuticals, heavy metals, pesticides, dioxins, in its tissues.

Characteristic feeding method

Chemoautotroph. An organism that obtains metabolic energy by oxidation of inorganic substrates such as sulphur, nitrogen or iron.

Deposit feeder – Subsurface. Synonym: detritivore. An organism feeding on fragmented particulate organic matter in the substratum.

Deposit feeder – Surface. Synonym: detritivore. An organism feeding on fragmented particulate organic matter from the surface of the substratum.

Grazer. An organism feeding on plants (higher aquatic plants, benthic algae and phytoplankton) and/or sessile animals organisms.

Herbivore. An organism feeding on plants (higher aquatic plants, benthic algae and phytoplankton).

Mixotroph. An organism both autotrophic and heterotrophic.

Omnivore. An organism feeding on mixed diet of plant and animal material.

Parasite. Feeding on the tissues, blood or other substances of a host.

Photoautotroph. An organism that obtains metabolic energy from light by photosynthesis (e.g. seaweeds, phytoplankton).

Planktotroph. An organism feeding on plankton.

Predator. An organism that feeds by preying on other organisms, killing them for food.

Scavenger. An organism feeding on dead and decaying organic material.

Suspension feeder – Active. An organism feeding on particulate organic matter, including plankton, suspended in the water column, collecting it actively by sweeping or pumping (creating feeding currents).

Suspension feeder – Passive. An organism feeding on particulate organic matter, including plankton, suspended in the water column, utilizing the natural flow to bring particles in contact with feeding structures.

Symbiont contribution. Where some dietary component(s) are provided by symbiotic organisms (e.g. Anemonia with zooxanthellae).

Developmental trait

Brooding. The incubation of eggs either inside or outside the body. Eggs may be brooded to a variety of developmental stages. Males or females may be responsible for brooding.

Direct development. A life cycle lacking a larval stage.

Spawning. The release of gametes into the water.

Lecithotrophy. Development at the expense of internal resources (i.e. yolk) provided by the female.

Parental care. Any form of parental behaviour that is likely to increase the fitness of offspring.

Planktotrophy. Feeding on plankton.

Resting stages. The quiescent stage in the life cycle (dormancy, diapause).

Viviparous. Producing live offspring from within parental body.

Habitat modifying ability potential

Autogenic ecosystem engineers. Organisms which change the environment via their own physical structures (i.e. their living and dead tissues) such as corals, oysters, kelps, sea grasses, etc.

Allogenic ecosystem engineers. Organisms which modify the environment by causing physical state changes in biotic and abiotic materials that, directly or indirectly, modulate the availability of resources to other species (e.g. excavating deep burrows which other organisms co-occupy, damming the water flow, etc).

Keystone species. A keystone species is crucial in maintaining the organization and diversity of its ecological community, by determining the types and numbers of other species.

Life form

Neuston. Organisms that live on (epineuston) or under (hyponeuston) the surface film of water bodies.

Zoobenthos. Animals living on or in the seabed.

Phytobenthos. Algae and higher plants living on or in the seabed.

Zooplankton. Animals living in the water column, unable to maintain their position independent of water movements.

Phytoplankton. Microscopic plankton algae and cyanobacteria.

Benthopelagos. Synonyms: hyperbenthic, benthopelagic, nektobenthic, demersal. An organism living at, in or near the bottom of the sea, but having the ability to swim.

Nekton. Actively swimming aquatic organisms able to move independently of water currents.

Parasite. An organism intimately associated with and metabolically dependent on another living organism (host) for completion of its life cycle.

Symbiont (nonparasitic). An organism living mutually with another species without harming it. Association of two species (symbionts) may be mutually beneficial.

Mobility

Boring. An organism capable of penetrating a solid substrate by mechanical scraping or chemical dissolution.

Burrowing. An organism capable of digging in sediment.

Crawling. An organism moving slowly along on the substrate.

Drifting. An organism whose movement is dependent on wind or water currents.

Permanent attachment. Non-motile; permanently attached at the base. Also includes permanent attachment to a host.

Swimming. An organism capable of moving through the water by means of fins, limbs or appendages.

Temporary attachment. Temporary / sporadic attachment. Attached to a substratum but capable of movement across (or through) it (e.g. Actinia). Also includes temporary attachment to a host.

Native origin

The region the species originates from.

References



References should follow the standard of Biological invasions:


Journal article
Gamelin FX, Baquet G, Berthoin S, Thevenet D, Nourry C, Nottin S, Bosquet L (2009) Effect of high intensity intermittent training on heart rate variability in prepubescent children. Eur J Appl Physiol 105:731-738. doi: 10.1007/s00421-008-0955-8
Ideally, the names of all authors should be provided, but the usage of “et al” in long author lists will also be accepted:
Smith J, Jones M Jr, Houghton L et al (1999) Future of health insurance. N Engl J Med 965:325–329


Article by DOI


Slifka MK, Whitton JL (2000) Clinical implications of dysregulated cytokine production. J Mol Med. doi:10.1007/s001090000086


Book
South J, Blass B (2001) The future of modern genomics. Blackwell, London


Book chapter
Brown B, Aaron M (2001) The politics of nature. In: Smith J (ed) The rise of modern genomics, 3rd edn. Wiley, New York, pp 230-257


Online document
Cartwright J (2007) Big stars have weather too. IOP Publishing PhysicsWeb. http://physicsweb.org/articles/news/11/6/16/1. Accessed 26 June 2007


Dissertation
Trent JW (1975) Experimental acute renal failure. Dissertation, University of California

Reproductive frequency

Iteroparous. Organisms breeding more than once in their lifetime.

Semelparous. Organisms breeding once in their lifetime.

Reproductive type

Asexual. Budding, Fission, Fragmentaion, including parthenogenesis. A form of asexual multiplication in which:
a) a new individual begins life as an outgrowth from the body of the parent. It may then separate to lead an independent existence or remain connected or otherwise associated to form a colonial organism;
b) the ovum develops into a new individual without fertilization;
c) division of the body into two or more parts each or all of which can grow into new individuals is involved.

Self-fertilization. Selfing or autogamy. The union of a male and female gamete produced by the same individual.

Sexual. Permanent hermaphrodite, Protandrous hermaphrodite, Protogynous hermaphrodite, Gonochoristic.
Capable of producing both ova and spermatozoa either at the same time. A condition of hermaphroditism in plants and animals where male gametes mature and are shed before female gametes mature or vice versa.
Having separate sexes.

Salinity

The exact salinity range if known (psu), else salinity zone(s) according to the Venice system:
1. Limnetic [<0.5psu]
2. β-Oligohaline [0.5-3psu]
3. α-Oligohaline [3-5psu]
4. β-Mesohaline [5-10psu]
5. α-Mesohaline [10-18psu]
6. Polymixohaline [18-30psu]
7. Euhaline [30-40psu]
8. Hypersaline [>40psu]

Sociability

Colonial. Descriptive of organisms produced asexually which remain associated with each other; in many animals, retaining tissue contact with other polyps or zooids as a result of incomplete budding.

Gregarious. Organisms living in groups or communities, growing in clusters.

Solitary. Living alone, not gregarious.

Sub-species level

A geographical subset of a species showing discrete differences in morphology, coloration or other features when compared with other members of the species. Subspecies may also differ in their habitat or behavior, but they can interbreed. Often the lowest taxonomic level within a classification system.

Synonym

Valid synonyms of a species (not all of them).

Toxicity

Poisonous. An organism capable of producing poison that gains entry to another organism body via the gastrointestinal tract, the respiratory tract, or via absorption through intact body layers.

Venomous. An organism capable of producing poison, usually injected through another organism intact skin by bite or sting.

Not relevant. Neither poisonous nor venomous.

Public domain: Species account

Species Halophila stipulacea [WoRMS]
Authority (Forsskål) Ascherson, 1867
Family Hydrocharitaceae  
Order Alismatales  
Class Magnoliopsida  
Phylum Tracheophyta  
Synonym (?) Zostera stipulacea

References (not structured):
Guiry MD, Guiry GM (2011) AlgaeBase. World-wide electronic publication, National University of Ireland, Galway
Robertson EL (1984) Seagrasses. In: The marine benthic flora of Southern Australia. Part 1. (Womersley, H.B.S. Eds), pp. 57-122. Adelaide: D.J. Woolman, Government Printer, South Australia

Comments:
This name is currently regarded as a taxonomic synonym of Halophila stipulacea (Forsskål) Ascherson
Sub-species level (?) Not known
Native origin (?) LME: 33. Red Sea

References (not structured):
Por FD (1971) One hundred years of Suez Canal—a century of Lessepsian migration: retrospect and viewpoints. Systematic Biology 20, 138
Hartog C (1970) The seagrasses of the world. North Holland Publishing Co., Amsterdam 78, 449-464

Comments:
The seagrass was originaly described from the Red Sea and is distributed along the Asian and African shores of the western Indian Ocean,occuring from the Red Sea to Madagascar. After Suez Canal opening the species migrated to the Mediterranean Sea.
Life form / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Neuston
Zoobenthos
PhytobenthosX
Zooplankton
Phytoplankton
Benthopelagos
Nekton
Ectoparasite
Endoparasite
Symbiont (non parasitic)
Sociability / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Solitary
GregariousX
Colonial


References (not structured):
[1] Larkum, A. W. D. & Den Hartog, C. Evolution and biogeography of seagrasses. Biology of seagrasses. A treatise on the biology of seagrasses with special reference to the Australian region. Elsevier Science Publishers BV, Amsterdam, 112-156 (1989).
[2] Rindi, F., Maltagliati, F., Rossi, F., Acunto, S. & Cinelli, F. Algal flora associated with a Halophila stipulacea (Forsskål) Ascherson (Hydrocharitaceae, Helobiae) stand in the western Mediterranean. Oceanologica Acta 22, 421-429 (1999).

Comments:
Though earlier it was reported that it forms monospecific or polyspecific meadows (Larkum & Den Hartog, 1989), later studies in Vulcano Island in Italy report polyspecific meadows with up to 36 epiphytes associated with Halophila stipulacea (Rindi et al, 1999).
Reproductive frequency (?) Iteroparous

References (not structured):
Malm T (2006) Reproduction and recruitment of the seagrass Halophila stipulacea. Aquatic Botany 85, 345-349
Procaccini G, Acunto S, Famà P, Maltagliati F (1999) Structural morphological and genetic variability in Halophila stipulacea (Hydrocharitaceae) populations in the western Mediterranean. Marine Biology 135, 181-189
Lipkin Y (1975) Halophila stipulacea, a review of a successful immigration. Aquatic Botany 1, 203-215
Galil BS (2006) Halophila stipulacea. Delivering Alien Invasive Species Inventories for Europe (DAISIE)
Boudouresque CF, Verlaque M (2002) Biological pollution in the Mediterranean Sea: invasive versus introduced macrophytes. Marine pollution bulletin 44, 32-38

Comments:
The reproductive season takes place every year between May and September, depending on a variety of factors like light density and water temperature (Malm, 2006). In the bay of Eilat, first flowers are observed at the end of May. In the Mediterranean Sea the main flowering season seems to be in August (Lipkin, 1975), while Galil 2006 mentions the flowering season in July-August and seeding season in September.
Reproductive type (?) Asexual
Sexual

References:
Malm T (2006) Reproduction and recruitment of the seagrass Halophila stipulacea. Aquatic Botany 85, 345-349
Procaccini G, Acunto S, Famà P, Maltagliati F (1999) Structural, morphological and genetic variability in Halophila stipulacea (Hydrocharitaceae) populations in the western Mediterranean. Marine Biology 135, 181-189
Gambi MC, Barbieri F, Bianchi CN (2009) New record of the alien seagrass Halophila stipulacea (Hydrocharitaceae) in the western Mediterranean: a further clue to changing Mediterranean Sea biogeography. Marine Biodiversity Records 2
Fritsch C (1895) Ueber die Auffindung einer marinen Hydrocharidee im Mittelmeer. Verh Zool Bot Ges Wien 45, 104-106
Politis J (1926) De la presence de l'Halophila stipulacea (Fbrsk.) Aschers. dans les mers Grecques. Prakt. Akad. Athenon, l : 111] 13
Lipkin Y (1975) Halophila stipulacea in Cyprus and Rhodes, 1967-1970. Aquatic Botany 1, 309-320, doi:10.1016/0304-3770(75)90029-7
Boudouresque CF, Verlaque M (2002) Biological pollution in the Mediterranean Sea: invasive versus introduced macrophytes. Marine pollution bulletin 44, 32-38

Comments:
It's a dioecious seagrass. Procaccini et at 1999 report that only male flowers are found in the Mediterranean basin. Gambi et al 2009 conclude that since female flowers are difficult to be formed in the Mediterranean water temperatures, the main propagation methods of Halophila stipulacea needs to be fragmentation and vegetative stolonization.
Earlier though expeditions mention the presence of female flowers and fruits in different parts of the Mediterranean Sea, like in Rhodes (Fritsch, 1895), Saronic Gulf (Politis, 1926), and Cyprus (Lipkin, 1975c).
Developmental trait (?) Spawning

References:
Pettitt JM (1981) Reproduction in seagrasses: pollen development in Thalassia hemprichii, Halophila stipulacea and Thalassodendron ciliatum. Annals of Botany 48, 609-622
Characteristic feeding method / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
PhotoautotrophX
Mixotroph
Suspension feeder – Active
Suspension feeder – Passive
Deposit feeder – Surface
Deposit feeder – Sub-surface
Omnivore
Herbivore
Scavenger
Symbiont contribution
Planktotroph
Chemoautotroph
Predator
Grazer


References (not structured):
Runcie JW et al (2009) Photosynthetic responses of Halophila stipulacea to a light gradient. I. In situ energy partitioning of non-photochemical quenching. Aquatic Biology 7, 143-152
Mobility / Life stage (?)
 AdultJuvenileLarvaeEggsResting stage
Swimmer
Crawler
Burrower
DrifterX
Temporary attachment
Permanent attachmentX
Borer


References (not structured):
Pettitt JM (1981) Reproduction in seagrasses: pollen development in Thalassia hemprichii, Halophila stipulacea and Thalassodendron ciliatum. Annals of Botany 48, 609-622
Rindi F, Maltagliati F, Rossi F, Acunto S, Cinelli F (1999) Algal flora associated with a Halophila stipulacea (Forsskål) Ascherson (Hydrocharitaceae, Helobiae) stand in the western Mediterranean. Oceanologica Acta 22, 421-429

Comments:
Pollen and seeds are drifters curried with currents but the adult stage is permanently attached on soft substrate.
Salinity tolerance range (?) Venice system:
7. Euhaline [30-40psu]
Habitat modifying ability potential (?) Keystone species

References:
Haritonidis S, Diapoulis A (1990) Evolution of Greek marine phanerogam meadows over the last 20 years. Posidonia Newsletter 3, 5-10
Tsiamis K, Montesanto B, Panayotidis P, Katsaros C, Verlaque M (2010) Updated records and range expansion of alien marine macrophytes in Greece (2009). Mediterranean marine science 11, 61-79
Gambi MC, Barbieri F, Bianchi CN (2009) New record of the alien seagrass Halophila stipulacea (Hydrocharitaceae) in the western Mediterranean: a further clue to changing Mediterranean Sea biogeography. Marine Biodiversity Records 2
Williams SL (2007)Introduced species in seagrass ecosystems: Status and concerns. Journal of Experimental Marine Biology and Ecology 350, 89-110
Willette DA, Ambrose RF (2009) The distribution and expansion of the invasive seagrass Halophila stipulacea in Dominica, West Indies, with a preliminary report from St. Lucia. Aquatic Botany 91, 137-142
Ruiz H, Ballantine DL (2004) Occurrence of the seagrass Halophila stipulacea in the tropical West Atlantic. Bulletin of Marine Science 75, 131-135

Comments:
Besides the strong invasive behavior that is mentioned in the Aegean and the Ionian Seas (Haritonidis and Diapoulis 1990) and the high numbers of Halophila stipulacea meadows, no reports of native species displacement are found by now (Tsiamis et al, 2010).
Gambi et al 2006 report that meadows in Palinuro harbour were found growing on dead mattes of Posidonia oceanica, and it was observed vertically outgoing P. oceanica.
The small size of Halophila stipulacea might allow the co-existence with other larger native seagrasses without any ecological consequences of its introduction (Gambi et al, 2009).
In the Caribbean more intensive invasive behavior has been reported though. Willete & Ambrose 2009 report that in Dominica republic, because of Halophila's more rapid colonization success after disturbance events, the invasive species was able to expand in areas that used to be covered by the native seagrass Syringodium filiforme. Such events could eventually lead to the replacement of native species and even cause cascading trophic effects to the whole trophic net (Willette & Ambrose, 2009). The presence of a comparatively environmentally tolerant seagrass such as H. stipulacea could reshape the marine resources and eventually supporting a higher number of grazing fish and invertebrate species (Willette & Ambrose, 2009).
As well in Grenada, Ruiz & Bellantine 2004 report clews that can support both competition and reduction of native biodiversity. This is due to the luck of any other native seagrasses into the meadows of Halophila stipulacea they observed, while in the nearby bays native seagrasses are present.
Toxicity / Life stage (?) Not relevant

References:
Boudouresque CF, Verlaque M (2002) Biological pollution in the Mediterranean Sea: invasive versus introduced macrophytes, Marine pollution bulletin 44 (2002) 32-38

Comments:
No toxic characteristics were even mentioned in the literature for any of its life stages.
Bioaccumulation association (?) Unknown

Comments:
Not available.
Known human health impact? Not known

Comments:
Not available.
Known economic impact? Not known

Comments:
Not available.
Known measurable environmental impact? Known

References:
Smulders, F.O.H., Arie Vonk, J., Engel, M.S., and Christianen, M.J.A., 2017. Expansion and fragment settlement of the non-native seagrass Halophila stipulacea in a Caribbean bay. Mar. Biol. Res. 13 (9), 967-974. https://doi.org/10.1080/17451000.2017.1333620

Comments:
Competition, habitat alteration (Smulders et al. 2017).
Included in the Target Species list? Yes

Comments:
Assessed by the COMPLETE project experts (2021), included in target species list.
Association with vessel vectors (?) Ballast waters
Biofouling

References:
Williams, S. L. (2007). Introduced species in seagrass ecosystems: status and concerns. Journal of Experimental Marine Biology and Ecology, 350(1), 89-110.

Comments:
Often found in harbours; it might be transfered by boats or fishing gears.
Its recent finding in the West Indies further supports its capability dispersal by vessels
Molecular information Available

Varela-Álvarez E et al (2011) Molecular identification of the tropical seagrass Halophila stipulacea from Turkey. Cahiers de biologie marine 52, 227-232
Procaccini G, Acunto S, Famà P, Maltagliati F (1999) Structural, morphological and genetic variability in Halophila stipulacea (Hydrocharitaceae) populations in the western Mediterranean. Marine Biology 135, 181-189

Comments:
Comparisons of the genetic polymorphism between isolates from the Turkish coasts of the Aegean Sea and individuals from putative native (Red Sea) and introduced (Mediterranean) showed no intra-individual variability, and the geographic distance in Km did not seem to have any relation with intra or interspecific diversity among isolates (Varela-Álvarez et al, 2011).
Procaccini et al 1999 didn't prove any significant correlation between morphological and genetic variability in the meadows in Sicily, Italy. The meadows though showed high morphological ang genetic polymorphism.
Last update byMonika Pelėdienė, 2022-01-18