#2019 at 06:26PM

[botanyone]

Climate Change Poses Heat Risk to Alpine Plants

Climate Change Poses Heat Risk to Alpine Plants https://ift.tt/OWA7KhR New research suggests that alpine plants may be more vulnerable to heatwaves than previously thought. A study published in Environmental and Experimental Botany, by Gilbert Neuner and Othmar Buchner at the University of Innsbruck, investigated how heat exposure duration, as well as intensity, affects the temperature thresholds for damage and dysfunction in alpine plant species. Their findings are given away in the paper’s title: “The dose makes the poison: The longer the heat lasts, the lower the temperature for functional impairment and damage.” The results could improve the accuracy of models predicting the ecological impacts of longer heat waves. The research came about because while the peak temperatures of heatwaves may grab the headlines, While heatwaves Neuner and Buchner were concerned about heatwaves also getting longer. They set out to examine the effect of heat-dose, a measure of both intensity and duration of heat exposure. To do this, the researchers exposed leaves from tree species at the treeline as well as alpine dwarf shrubs and herbs to a range of temperatures, from 34°C to 64°C, and durations, from 1 minute to 8 hours. They found that with increasing duration, the critical temperature for heat damage decreased substantially by 11-18°C. In particular, they found that Photosystem II, the part of photosynthesis that splits water into hydrogen ions and oxygen, was impaired at even lower temperatures. Photosystem II could start breaking down at temperatures up to 10°C lower than the critical temperature for heat damage. This disturbance is not a trivial situation for a plant. Many herbicides work by damaging Photosystem II. The results mean that modelling heat damage to ecosystems is more complicated than taking a single value for temperature. In their article, Neuner and Buchner write: Our results essentially confirm the early findings of Kappen and Zeidler (1977) on the dose-dependence of heat damage. However, by testing prolonged heat exposure of more than 30 min, we add completely new findings. They are relevant because natural heat episodes lasting longer than 30 min at the leaf level were frequently observed at the studied alpine field sites for small plants. Describing resilience of a species against heat by a single threshold temperature may be definitely helpful for species comparisons (Larcher, 2003, Schulze et al., 2019) or when the intraspecific heat hardening capacity (acquired thermo-tolerance) is assessed (Buchner and Neuner, 2003, Neuner and Buchner, 2012). However, a single threshold may not be sufficient to assess the ecological significance or to model the risk of heat damage in a future warmer climate. To answer these questions, it is imperative to consider the dose effect, i.e., specifically exposure duration above critical thresholds in addition to heat intensity. Neuner and Buchner 2023. The findings suggest that heatwave intensity, duration, and frequency must all be considered when evaluating heat risk for alpine plants. The researchers say their dose-dependent model provides a more accurate way to predict future ecological impacts of climate warming in alpine regions. READ THE ARTICLE Neuner, G. and Buchner, O. (2023) “The dose makes the poison: The longer the heat lasts, the lower the temperature for functional impairment and damage,” Environmental and Experimental Botany, 212(105395), p. 105395. Available at: https://doi.org/10.1016/j.envexpbot.2023.105395. The post Climate Change Poses Heat Risk to Alpine Plants appeared first on Botany One. via Botany One https://botany.one/ July 19, 2023 at 06:26PM

[gesau-it]

█ ♥* Io riverso grandi Grazie sui Miei Discepoli in questo tempo https://messaggidivinamisericordia.blogspot.com/2019/06/io-riverso-grandi-grazie-sui-miei.html ººº — █ █ April 17, 2023 at 02:26PM

[overlooked-tracks]

An Overlooked Music Track: RUMKICKS. It’s Time to Support Music!

The following article has been posted on September 20, 2022 at 06:26PM:

STREAMING TRACKS FROM THE OVERLOOKED TRACKS PODCAST – SPONSORED BY APPLE MUSIC

Since you’ve heard great music on the Overlooked Tracks podcast, here’s your chance to further support RUMKICKS! Check this track and head over to Apple Music to find more of what RUMKICKS with other music performers have to offer. We’re staying focused on finding music so you can listen, enjoy and not overlook!!

So, it’s a win-win: You support music artists and Overlooked Tracks and we continue to grow and support more music at a global scale!!

Music Artist: RUMKICKS Music Track Name: 우리는 Music Track Release Date: 2019-07-15 12:00:00 Price of Track: 0.99 / USD https://audio-ssl.itunes.apple.com/itunes-assets/AudioPreview113/v4/45/e1/7d/45e17d49-bfad-2f44-b157-a3f72e33fd53/mzaf_10878770231405973111.plus.aac.p.m4a

  Affiliate Link Statement: Please notice and read Our Disclosure (and your right to know): There are affiliate links (a site link forwarding a request to a specific sponsor or product) on this post which may result in the Overlooked Tracks Podcast receiving a commission for your purchase of RUMKICKS’s music. We desire to support RUMKICKS’s music as much as possible and in turn receive a commission to further grow the podcast and continue supporting the gift of music. We have verified and used the link to make sure you are comfortable to go to the source of music.

Listen to More Music on Apple Music and can be found on the Overlooked Tracks website: https://ift.tt/NWtu3CB. Check out more music news from Overlooked Tracks! Music from Asia (Incl. J-Pop, K-Pop), Rock, Apple, Music, R&B/Soul, streaming

[sangklp]

@anntei_a @taniku_plant wkwkdkdk https://www.youtube.com/c/lifesang

[bilderserien]

Die Bundesliga in Wort und Witz: "Jetzt trinken wir erstmal ein Bier" https://ift.tt/33cxZdH

[coachsander]

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[4rt4gallery]

Yuko Shimizu ~ “Dusting Off the Male Gaze“ (For The...

[essencepoints]

https://ift.tt/eA8V8J Amazon fires: Seven countries sign forest protection pact  BBC News One of the world's largest retailers bans Brazilian leather after Amazon fires  ABC News Amazon countries sign pact to better protect the rainforest  Aljazeera.com Brazil's President Is Too Afraid to Stop the Amazon Fires. But the World Can't Wait | Opinion  Newsweek Amazon fires are a shameful indictment of our lust for excess  The Guardian View full coverage on Google News source https://www.bbc.com/news/world-latin-america-49609702

http://primalgists.blogspot.com/2019/09/amazon-fires-seven-countries-sign.html

[lunainsane]

02 marzo 2019 - 06:26pm

[sangklp]

@Origami_0515 @anntei_a はいはいちゃんと二人とも好きですよこれで満足ですかもうまじやだ https://www.youtube.com/c/lifesang

[dopingconsomme]

だんだん魅魔様画像が増えていく…！！感激！！ pic.twitter.com/Mnrb5XIbcB

— チョーペペ (@MZDONRU) May 6, 2019

source:tweet

#Twitter

[toabh]

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[xolovejessie4181]

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[food-log-life]

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[microsff]

Tweetstory

"I was the rabbit that ..." I mutter "Rest" as I walk past the little skeleton. "I was the hart..." "I was the fox..." I send them to rest. Getting close to the center, to the ones holding all back. "We were the soldiers..." Ah. I listen until all their stories are told. "Rest."

— Micro SF/F stories (@MicroSFF) October 6, 2019

via MicroSFF on Twitter https://twitter.com/MicroSFF October 06, 2019 at 05:26PM