Paypay:Alsomitra macrocarpa seed (syn. Zanonia macrocarpa).jpg
Orihinal nga paypay (3,940 × 2,620 nga pixel, kadako han fayl: 8.65 nga MB, MIME nga tipo: image/jpeg)
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Dalikyat nga pulong
| Tigtulidong |
Kebun Raya, Bogor, Indonesia. A bit of flowery prose from an essay that I wrote in 2001 on wind-dispersed seeds & fruits: "Every now and then, field botanists are treated to transcendental moments when the light is golden, the air is fresh, interesting plants are at hand, and the hardships of field work just melt away. During those times, scientific insights arrive with astonishing clarity and grace. One such moment for me came on a sunny afternoon in the Kebun Raya Botanic Garden, in Bogor, Indonesia, some years ago. On that memorable day, I was transfixed as I watched dozens of winged seeds of Alsomitra macrocarpa (Cucurbitaceae, the squash family) glide to the ground in broad, lazy spirals. The seeds spilled out from a fruit hanging on the liana climbing on one of the enormous old trees in the garden. All the principles of aerodynamics as they relate to seed dispersal were manifest in that one lovely moment. "The gliding seeds of Alsomitra exhibit two kinds of motion: The forward gliding motion, which takes the seed on a helical, downward path, and phugoid oscillations, in which the gliding seed gains lift, stalls, drops briefly until it accelerates enough to generate lift, starting the process over again. Phugoid oscillations are well known to aviation engineers and model airplane fliers, because they can destabilize mechanized flight, but in the seeds of Alsomitra, phugoid oscillations add a graceful rhythm to the descent, and more importantly, slow the descent of the seeds giving them more time aloft. Time aloft is the sine qua non of successful dispersal by wind." |
| Petsa | |
| Ginkuhaan | Alsomitra macrocarpa seed (syn. Zanonia macrocarpa) |
| Awtor | Scott Zona from Miami, Florida, USA |
Palilisensya:
- Talwas ka:
- para han pagpasaro – para han pagkopya, pagpakalat ngan pagpadangat han buhat
- para han pagremix – pag-adapt han buhat
- Ha ilarom an masunod nga mga kondisyon:
- attribution – Kinahanglanon mo tagan hin kaangayan nga credit, paghatag hin sumpay ngadto ha lisensya, ngan igbutang an imo ginbag-ohan nga binuhat. Puydi mo ini buhaton ha bisan ano nga resonable nga pamaagi, pero diri nimo pagawson nga an naghatag hin lisensya nag-eendorso ha imo o ha imo paggamit.
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This image was originally posted to Flickr by scott.zona at https://www.flickr.com/photos/12017190@N06/5616740256. It was reviewed on 4 Mayo 2011 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
Palilisensya:
- Talwas ka:
- para han pagpasaro – para han pagkopya, pagpakalat ngan pagpadangat han buhat
- para han pagremix – pag-adapt han buhat
- Ha ilarom an masunod nga mga kondisyon:
- attribution – Kinahanglanon mo tagan hin kaangayan nga credit, paghatag hin sumpay ngadto ha lisensya, ngan igbutang an imo ginbag-ohan nga binuhat. Puydi mo ini buhaton ha bisan ano nga resonable nga pamaagi, pero diri nimo pagawson nga an naghatag hin lisensya nag-eendorso ha imo o ha imo paggamit.
- share alike – Kun imo ginsagol-hin-otro, gin-iba, o gin-hingayad han buhat, ikaw in angay gud là magpakalat han imo gin-amot ha ilarom la han [http:creativecommons.org/share-your-work/licensing-considerations/compatible-licenses pareho o naangay nga lisensya] sugad han orihinal.
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This image was originally posted to Flickr by scott.zona at https://www.flickr.com/photos/12017190@N06/5616740256. It was reviewed on 4 Mayo 2011 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
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Pidlita an adlaw/oras para makit-an an fayl nga naggawas hito nga oras.
| Pitsa/Oras | Thumbnail | Mga dimensyon | Gumaramit | Komento | |
|---|---|---|---|---|---|
| waray pa kasasapawi | 09:44, 4 Mayo 2011 | | 3,940 × 2,620 (8.65 nga MB) | RicReis | {{Information |Description=Kebun Raya, Bogor, Indonesia. A bit of flowery prose from an essay that I wrote in 2001 on wind-dispersed seeds & fruits: "Every now and then, field botanists are treated to transcendental moments when the light is golden, the |
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