File:Gold and Red Aspens above Dune Ridges (36579712523).jpg
Original file (4,608 × 3,456 pixels, file size: 2.33 MB, MIME type: image/jpeg)
Captions
Captions
Summary
[edit].jpg&action=edit§ion=1){kind=link}
| Description |
NPS/Patrick Myers Today is the first day of autumn! Colors are changing quickly above the dunes, making for spectacular contrasts of fall forests and stark desert dunes. Why do most aspen trees turn yellow, but some turn orange or red? Part of it is the genetic makeup of each group of trees: aspens are connected by root systems, so that all the aspens in one group are clones of each other. The other variables are soil nutrition, amount of rain, and amount of sunlight. As leaves slow down green chlorophyll production in fall, yellowish carotenoids are exposed in aspen leaves. However, in certain trees, red anthocyanins are also created, especially in very sunny autumns. Anthocyanins act as a sunscreen for the leaves as the chlorophyll disappears. Whatever the cause, it delights the eyes and senses to see colorful aspen leaves trembling in the autumn sun!
|
| Date | |
| Source | Gold and Red Aspens above Dune Ridges |
| Author | Great Sand Dunes National Park and Preserve |
Licensing
[edit].jpg&action=edit§ion=2){kind=link}
|
This image or media file contains material based on a work of a National Park Service employee, created as part of that person's official duties. As a work of the U.S. federal government, such work is in the public domain in the United States. See the NPS website and NPS copyright policy for more information. |  |
|
This image was originally posted to Flickr by Great Sand Dunes National Park and Preserve at https://flickr.com/photos/94707653@N06/36579712523. It was reviewed on 1 January 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:58, 4 October 2021 | | 4,608 × 3,456 (2.33 MB) | Ltn12345 (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
.jpg&oldid=916836499){kind=link}