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Found 32 results

  1. Ecological Research. Angelina Rowell, James Cook University, Cairns. Studied the relationships between Myrmecodia beccarii and Philidris ants in North Queensland mangroves. She reported (pers. comm.) that resident ants actually castrate their home plants by cutting up its flowers and transporting resultant pieces to their nests within tubers. Angelina found more buds and flowers were produced on ant-colonised, thus well-fed plants, so more fruit should develop on them. Yet, there were more fruits on uncolonised specimens, even though their bud and flower numbers were nutritionally constrained through a lack of ant feeding. Therefore, ants must be removing flowers before pollination, resulting inevitably in lower fruit/seed numbers. Furthermore, Angelina found that ants only removed flowers from their host plant, not from nearby uncolonised plants. Angelina’s Anova statistical analysis, showed that there was no significant difference between the fruit number on colonised versus uncolonised plants (i. e. fruit production is equal). Therefore, ants are not increasing home plant reproductive output. To belabor a point, trophic benefits that the plants are getting from their ants is not transferred to greater seed production because of flower castration. There are greater numbers of leaves on colonised plants, which in theory translates to a greater growth rate in the plant tuber and bigger domatia. But this project did not have enough time allocated to measure increase in plant growth. In summary, more buds, flowers and leaves on colonised plants does not result in more fruit and seed production. Angelina also noted on another thread. "We are looking at the spined form that occurs in the Cairns area. It seems that the majority of the flowers that are left on the plants by the ants develop into fruit. Not 100% sure if it is self pollinating - yet .....The ant interactions with this species is very interesting." I have tried to find more information on line but have not been successful. Attn Dr Guillaume Chomicki. This surely is important to the field of mutualisms.? It is very probable that resident ants are deliberately improving the growth rates of home tubers. Photos Angelina Rowell.
  2. Hello. I have a specimen Myrmecodia sp. Probably Myrmecodia echinata. She's been here for two years. I had various problems with her. Once he had too little light and too much water. Then, some mites and porcellio sp. Damaged her. I healed her for some time. It has a more breathable / breathable substrate, less water and much better light for plants. She released a new impetus and beautiful new leaves. There have been no rootlets for a long time. I do not know why. Is there a chance that it will still release the roots? What could be wrong? I apologize for my bad English.
  3. Derrick

    Avonia journal

    The December 2017 issue of the prestigious German journal Avonia has an article with photos about the ant-plants of Milne Bay Province, Papua New Guinea. It is presented with what I hope is enough background information to encourage others to follow in my footsteps. The next issue will cover part two; the islands.
  4. 34 Myrmecodia tuberosa "dahlii" Kokopo, Gazelle Peninsula, East New Britain Island, PNG..JPG]
  5. All of these images were taken in or near Kutini-Payamu better known under its former name of Iron Range National Park, Cape York Peninsula, North Queensland, Australia. http://en.wikipedia.org/wiki/Kutini-Payamu_%28Iron_Range%29_National_Park IMG_0099b Myrmecodia tuberosa (papuana form) Iron Range National Park. Cape York Peninsula, North Queensland, Australia..JPG]
  6. 230c. Myrmecodia pendens above river (altitude about 2361 m.) near Mendi, Southern Highlands Province, Papua New Guinea..JPG]
  7. As indeed may be all hydnophytinae. I have known about this study for some time but could not previously access a copy. http://www.bergianska.se/polopoly_fs/1.77677.1329987311!/menu/standard/file/Nepokroeff_et_al_1999.pdf http://www.amjbot.org/content/early/2014/07/20/ajb.1400076.full.pdf
  8. 24 Myrmecodia tuberosa "salomonensis".JPG] Crown Prince Range above Arawa, Bougainville Island, Northern Solomon Islands. This is a particularly robust form of this extremely widespread and varied 'species' which is possibly an example of lumping and future research (DNA?) might consider some forms to be individual species.
  9. From the album: myrmecodia

    i found this in mangrove tree. what kind of this Myrmecodia? does anyone know?
  10. IMG_0118B. Myrmecodia platytyrea subsp. antoinii. Iron Range National Park, Cape York Peninsula, Queensland, Australia..JPG]
  11. These photos were all taken in and around the little frontier township of Cooktown (my first visit) on the Crocodile infested Endeavour River near the base of Cape York Peninsula.where great care in the bush is essential. Dischidia nummularia the ubiquitous parasite of Australasian plant and ant symbioses, lurks nearby. Most photos were taken in a Paperbark tree - Melaleuca species - seasonal swamp; however, plants may even be viewed in Cooktown's interesting botanical gardens but even here it is wise to watch for snakes, a number of species have dangerously 'sharp' ends. Photographer and author Attila Kapitany is a renowned expert on Australian xerophytic plants. This latitudinally widespread northern form has quite spiny tubers except that old plants can lose their spines as can be seen here. IMG_0351 Myrmecodia beccarii near Cooktown, North Queensland, Australia..JPG] attachment=252: IMG_0385 Myrmecodia beccarii northern form with Dischidia nummularia, Cooktown..JPG] attachment=253: IMG_0386 Myrmecodia beccarii northern form with Dischidia nummularia, Cooktown..JPG]
  12. This is the almost spineless southern form that has some genetic differences to the far more widespread spiny northern form; however, it seems not enough for it to be given an infra generic ranking such as subspecies or variety. As usual it is accompanied by Dischidia nummularia and in this particular habitat frequently by the so called Onion orchid Dendrobium (Cepobaculum) tattonianum but no other epiphytes. Some specimens have an unusually bubbled tuber for which I have no idea as to cause but the affliction seems to be more common in these southern latitude plants. Most plants were perched on Paperbark trees, the species here being Melaleuca viridiflora. Paperbark trees grow in seasonal lowland swamps where the mosquitoes and sand flies can be horrendous. One must also be aware of venomous snakes, saltwater crocodiles and even the possibility of bush fires in the dry season. JPG]
  13. http://www.indopacific.org/pdf/Flora-Fauna%20of%20the%20Tangguh%20LNG%20Site.pdf Also a Hydnophytum sp as well as dischidias & hoyas on the Bomberai Peninsula, West Papua Province, New Guinea. Can this post be removed? I have misspelt the specific name and anyway it is now superfluous.
  14. Here's a pic of the back of my unidentified Myrmecodia species. It's growing mounted on a slab of EcoWeb attached to one side of my paludarium. It's watered from above by a spraybar on a timer. It gets water for an hour on/hour off from 7am til 7pm, and goes dry at night.
  15. Specimens of the Myrmecodia ferox, gracilispina, horrida, melanacantha group that I cannot identify to species level. 129b Myrmecodia sp. less robust spines yet long petioles. +7,000' (2,134m.) Rondon Ridge..JPG]
  16. 62b Myrmecodia platytyrea subsp antoinii, Ilolo, Sogeri Plateau. Central Province, PNG..JPG]
  17. 163b Myrmecodia melanacantha longer finer spines, high on Rondon Ridge..JPG]
  18. This species has in addition to its complex of tunnels and chambers within its tuber, additional connecting tunnels that run the length of its thick stems to open at alveoli. There are three other closely related species that share this characteristic. The second image shows entrance alveoli to the stem tunnels. 145 Myrmecodia horrida above 7,000 ft. (2134 m.) Rondon Ridge overlooking Mt Hagan City..JPG]
  19. Here we have a very narrow band of stilted mangroves just a few trees wide growing on a silica sand beach south of Trinity Inlet. The site was too harsh to support any epiphytes other than this myrmecophyte species yet the plants were in a surprisingly healthy condition. 679 M. beccarii on stilted mangroves. Trinity Inlet..JPG]
  20. This species is one of a complex of four that also have tunnels within their thick stems that connect the tuber's gallery system to openings in apical stem alveoli. Western Highlands Province, Papua New Guinea.
  21. These are the latitudinally more widespread spiny "northern form". Taken from the mangrove boardwalk, Airport Avenue, Cairns, North Queensland, Australia. 4 Myrmecodia beccarii (northern form) juvenile..JPG]
  22. This form of enormously widespread Myrmecodia tuberosa was common in Balsa or Cocoa plantation forests in East New Britain Island and in many natural forest remnants, Papua New Guinea. 36b Myrmecodia tuberosa "dahlii".JPG]
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