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Found 5 results

  1. How to film sundew snap-tentacles. When filming sundew snap-tentacles, some simple measures can be helpful to prepare the recording correctly and to avoid disturbing shaking by unnecessary poking of the tentacle heads. That needs some understanding on their different response times and motion patterns. Since many years, we experimented with catapulting sundews and summarized our experiences now in this brief movie description, providing hints how to proceed with moderate and rapid catapult-flypaper traps. The idea for this film came up after some requests on Facebook how to film such tentacle motions. Good luck when filming your Drosera.
  2. Enjoy the amazing prey capture of a catapulting sundew. Short and succinctly (75 ms) but sensational. Meanwhile, we provide more than 120 thrilling videos on carnivorous plants on our (private and uncommercial) YouTube channel. Simply subscribe to stay up to date.
  3. Amazing results: Pygmy sundews capture minute prey like springtails with rapid catapult action. Our experiments for this film (English subtitles) show that Drosera glanduligera is not longer the only sundew with a catapult-flypaper trapping mechanism. Also the snap-tentacles of several pygmy Drosera act with the speed of a closing Venus flytrap and fling walking prey from the periphery of the plant onto its sticky leaf. Therefore they turn out to be actually comparable with the amazing Drosera glanduligera, however, their catapults are multifunctional and possess a mechanism to avoid unessential movement: Like Venus's Flytrap. Under our microscope we examined 22 Drosera and received surprising results. Furthermore we were able to film many pygmy Drosera in situ on field trips with Allen Lowrie, Greg Bourke and Kirstie Wulf (1991 & 2001), providing these shots now for the first time on YouTube. We are happy to introduce Gideon Lim from Malaysia, who showed the first video of the rapid snap-tentacles of D. pygmaea "New Zealand, all green" on the internet even in 2014. In addition, we recommend a visit at "Andy Landgraf Makrofotografie" on Flickr and on Facebook. Andy kindly provided some of his impressive macro-shots for our film, to feature some more minute prey and predators in "Pygmyland".
  4. Feed me ! Füttere mich ! The catapult-flypaper trap on German TV in September at "planet wissen". A short trailer to announce the broadcast: A sundew is kicking a fruit fly with one of its catapulting tentacles and makes it stumble into the catapult-trap of a neighbour plant. A mighty fine draft for this filmlet. The scientific publication of the catapult-flypaper trap in 2012 in PLOS ONE has been a botanical sensation. Also the technology writer Volker Arzt became aware of it and recommended our (until now unique) HD-shots to the editorial staff of the scientific broadcast "planet wissen". The result: On September 11th our HD-shots will be on air for the first time worldwide on the German TV stations SWR (1:15 pm) and ARD alpha (3 pm). A broadcast on WDR will follow soon.
  5. Trap diversity and evolution in the family Droseraceae Simon Poppinga, Siegfried R.H. Hartmeyer, Tom Masselter, Irmgard Hartmeyer and Thomas Speck A new review has been published in PBS (Plant Signaling & Behavior) and is now online (open access, link below). Recent investigations revealed how the snap-traps of Aldrovanda vesiculosa (waterwheel plant) and Dionaea muscipula (Venus’ flytrap) work mechanically and how these apparently similar devices differ as to their functional morphology and shutting mechanics. Recently, it was also shown that there exists a higher diversity of different tentacle types and trap configurations in Drosera than previously known which presumably reflect adaptations to different prey spectra. Based on these recent findings, we finally comment on possible ways for intrafamiliar trap evolution. http://www.landesbio.../article/24685/