{"id":11455,"date":"2024-03-21T10:00:00","date_gmt":"2024-03-21T10:00:00","guid":{"rendered":"https:\/\/modernsciences.org\/staging\/4414\/?p=11455"},"modified":"2024-03-07T09:53:05","modified_gmt":"2024-03-07T09:53:05","slug":"climate-change-is-warping-the-seasons","status":"publish","type":"post","link":"https:\/\/modernsciences.org\/staging\/4414\/climate-change-is-warping-the-seasons\/","title":{"rendered":"Climate change is warping the seasons"},"content":{"rendered":"\n
\n \n
\n \n Shawnwil23\/Shutterstock<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\nJack Marley<\/a>, The Conversation<\/a><\/em><\/span>\n\n

The seasons aren\u2019t what they used to be. <\/p>\n\n

People who live in Earth\u2019s middle latitudes are accustomed to a spring, summer, autumn and winter. If you\u2019re in the northern hemisphere, you may have noticed plants flowering earlier than usual. It\u2019s not your imagination: a 2022 study revealed that spring blooms are arriving a month sooner<\/a><\/strong> in the UK due to climate change.<\/p>\n\n

For a new series<\/a><\/strong> on the seasons and how they\u2019re being warped by a warming climate, over the coming months we\u2019ll be examining the consequences of these wrinkles in nature\u2019s calendar.<\/p>\n\n

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\n \"Imagine\n
\n <\/span>\n \n <\/figcaption>\n <\/figure>\n\n

This roundup of The Conversation\u2019s climate coverage comes from our weekly climate action newsletter<\/a>.<\/strong> Every Wednesday, The Conversation\u2019s environment editor writes Imagine, a short email that goes a little deeper into just one climate issue. Join the 30,000+ readers who\u2019ve subscribed.<\/a><\/em><\/p>\n\n

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How plants sense the seasons<\/h2>\n\n

Other species can\u2019t coordinate their activities around a date and time. Plants, the bedrock of most ecosystems, stay up to date by paying close attention to changes in light and temperature says Paul Ashton, head of biology at Edge Hill University.<\/p>\n\n

Plants are among the first to know when the days start to contract in autumn, as they use a pigment called phytochrome to detect changes in red light.<\/p>\n\n

\u201cWhile this subtle shift escapes humans (our eyes are not sensitive to this part of the spectrum) a plant can detect this transition and start to change.\u201d<\/p>\n\n

\n \"Sun\n
\n Trees sense the onset of autumn by detecting subtle changes in red light.<\/span>\n Brum\/Shutterstock<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

\u201cJust as the autumn can engineer a drop in the level of the hormone serotonin in our blood, a plant that has sensed winter\u2019s approach will increase the production of a hormone called abscisic acid,\u201d Ashton says. Abscisic acid makes deciduous trees shed their leaves and grow tough winter buds that are resistant to frost.<\/p>\n\n

Temperature tells many plants when to start growing<\/a> in the spring. Ashton says it isn\u2019t clear how plants sense this, but again, pigments in their cells probably play a role.<\/p>\n\n

\u201c[Plants] sense the days getting warmer and alter their spring development in a manner akin to humans feeling warmth on their skin and so stepping out with fewer layers of clothing,\u201d he says.<\/p>\n\n\n\n

That\u2019s where climate change has complicated things: rising air temperatures have yielded shorter, milder winters. Since 1986, plants in the UK now greet spring 26 days earlier, on average.<\/p>\n\n

This relatively rapid shift has severed an arrangement plants and animals have negotiated over thousands of years.<\/p>\n\n

\u201cInsects that are used to feasting on April-flowering plants may find themselves arriving a month late if warmer temperatures mean that the plants now flower in March,\u201d say Chris Wyver and Laura Reeves, PhD candidates who study pollination and climate change at the University of Reading.<\/p>\n\n\n\n

Out of the loop<\/h2>\n\n

Hungry bugs are bad enough. But if insects are emerging too late to visit expectant flowers then it\u2019s the entire ecosystem that suffers<\/a>.<\/p>\n\n

\u201cTake, for example, the birds of European oak woods, such as the blue tit, great tit and pied flycatcher,\u201d says Charlie Gardner, a lecturer in conservation biology at the University of Kent. Caterpillars are emerging earlier than they did in the past, and the birds that eat them can\u2019t keep up.<\/p>\n\n

\u201cFor every ten-day advance in caterpillar emergence, the birds are only able to bring forward their egg laying by three to five days, depending on the species,\u201d he says.<\/p>\n\n\n\n

\n \"A\n
\n Birds can only adapt so much to seasonal shifts in the emergence of their prey.<\/span>\n Rudmer Zwerver\/Shutterstock<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

Freak weather, a more common feature of our heating climate, can also confuse the finely calibrated senses of wildlife and trick some species into thinking the season shifted while they weren\u2019t paying attention. <\/p>\n\n

Stuart Thompson, a senior lecturer in plant biochemistry at the University of Westminster, highlights how the drought that parched Europe in 2022 convinced some trees to lose their leaves \u2013 giving the impression of autumn in mid-August<\/a>.<\/p>\n\n\n\n

Across the broader trends that scientists have documented at least one thing is consistent: winter is being squeezed from both sides as the world heats up. <\/p>\n\n

\u201cClimate researchers now have nearly five decades of satellite observations at their disposal,\u201d says Jadu Dash, a professor of remote sensing at the University of Southampton.<\/p>\n\n

\u201cAnalysis of this data reveals that spring has advanced by approximately 15 days, while autumn has been delayed<\/a> by a similar amount.\u201d<\/p>\n\n\n\n

But climate change won\u2019t simply usher in seasons where everything happens either a month earlier or later. Some species will delay hibernation and emerge in spring sooner, but others will stick to their original schedule, taking their cues from day length rather than temperature. <\/p>\n\n

The result will be chaos, says Gardner:<\/p>\n\n

\u201cIf we are to have any chance of preserving the living planet and avoiding the extinction of a million species, then we need to do more than stop climate breakdown. We need to invest in conservation too, to help wild plants and animals adapt to the changes we\u2019ve already locked in. Not doing so would be bad news for all of us.\u201d<\/p>\n\n

\n\n
\n \"Imagine\n
\n <\/span>\n \n <\/figcaption>\n <\/figure>\n\n

Don\u2019t have time to read about climate change as much as you\u2019d like?<\/em><\/strong>\n
Get a weekly roundup in your inbox instead.<\/a> Every Wednesday, The Conversation\u2019s environment editor writes Imagine, a short email that goes a little deeper into just one climate issue. Join the 30,000+ readers who\u2019ve subscribed so far.<\/a><\/em>\"The<\/p>\n\n

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Jack Marley<\/a>, Environment + Energy Editor, The Conversation<\/a><\/em><\/span><\/p>\n\n

This article is republished from The Conversation<\/a> under a Creative Commons license. Read the original article<\/a>.<\/p>\n\n","protected":false},"excerpt":{"rendered":"Shawnwil23\/Shutterstock Jack Marley, The Conversation The seasons aren\u2019t what they used to be. People who live in Earth\u2019s…\n","protected":false},"author":759,"featured_media":11428,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[13],"tags":[120,173,474],"class_list":{"0":"post-11455","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-earth","8":"tag-climate-change","9":"tag-global-warming","10":"tag-the-conversation","11":"cs-entry","12":"cs-video-wrap"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/11455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/users\/759"}],"replies":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/comments?post=11455"}],"version-history":[{"count":1,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/11455\/revisions"}],"predecessor-version":[{"id":11456,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/11455\/revisions\/11456"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media\/11428"}],"wp:attachment":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media?parent=11455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/categories?post=11455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/tags?post=11455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}