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Across 64 studies spanning rivers, lakes, burrows, and foraging grounds, the pattern emerged in both water and on land.<\/p>\n
Dr. Zareena Khan at Queen Mary University of London (QMUL<\/a>) documented average changes of 136 percent in freshwater systems.<\/p>\n The same body of evidence showed a 66 percent average change in terrestrial environments, extending the finding well beyond a handful of conspicuous cases.<\/p>\n That gap between freshwater and land sharpens the next question, which is how animals are producing such persistent physical changes in the ground itself.<\/p>\n Changes in soil texture<\/p>\n Much of that influence came from repeated changes in soil texture, especially when animals opened extra space between grains.<\/p>\n Researchers call that porosity<\/a>, the amount of empty space inside soil or sediment, and animals increased it across both environments.<\/p>\n At the same time, animal activity reduced fine material by 44 percent overall, often leaving coarser ground behind.<\/p>\n Looser ground and fewer fine particles changed how water could enter, move sediment, and deposit material in the same place.<\/p>\n Water, sediment mixing, and erosion <\/p>\n Once animals loosened or sorted the ground, water met less resistance and started moving sediment differently through streams, banks, and burrows.<\/p>\n In freshwater settings, the study found particle size rose 201 percent and sediment mixing jumped 444 percent on average.<\/p>\n On land, animals raised erosion by 299 percent and increased water infiltration and content by 17 percent.<\/p>\n Those changes help explain why a burrow, nest, or disturbed riverbed can redirect later floods, seepage, and sediment movement.<\/p>\n Freshwater carries stronger marks<\/p>\n Freshwater systems showed the strongest average response, well above the average effect measured on land.<\/p>\n Flowing water likely amplified those effects because loosened grains can move quickly once fish, crayfish<\/a>, worms, or other animals disturb them.<\/p>\n Terrestrial settings still showed large effects, but soils often held change closer to the source instead of spreading it downstream.<\/p>\n That difference matters for managers because river restoration and flood planning may miss a major driver when wildlife disappears.<\/p>\n Builders beyond beavers<\/p>\n Beaver dams may draw attention, but the evidence spans far wider, covering nine animal classes from fish and crustaceans to birds. <\/p>\n Burrowing, trampling, walking, feeding, and nest building all moved material, showing the effect does not depend on a single high-profile species.<\/p>\n \u201cAnimals are constantly redistributing soils and sediments through their everyday activities,\u201d said Dr. Khan.<\/p>\n The evidence shows that common behavior, repeated often enough, can change the ground without any single dramatic event.<\/p>\n The impacts aren\u2019t washed away<\/p>\n For years, scientists assumed steep, high-energy landscapes would wash away animal impacts, allowing floods and gravity to take over.<\/p>\n Instead, the analysis found little clear evidence that higher-energy settings consistently reduced animal influence across freshwater or terrestrial sites.<\/p>\n Some effects even changed direction with elevation, which means the setting shaped the kind of mark animals left.<\/p>\n The map is incomplete<\/p>\n This paper measured 61 wild species, but a 2025 global census<\/a> had already identified more than 600 animal taxa shaping Earth\u2019s surface.<\/p>\n Many of those animals still lack the paired data needed to estimate how strongly they change land or riverbeds.<\/p>\n That gap likely skews attention toward larger or more visible animals, even though quieter species may do heavy daily work.<\/p>\n The current numbers are better read as a floor than a full accounting of wildlife\u2019s landscape power.<\/p>\n Protecting ecosystems from stress<\/p>\n Because animals change how ground stores water and sheds sediment, losing them can alter how ecosystems respond to stress.<\/p>\n Freshwater habitats<\/a> deserve special attention, since the strongest effects appeared there and many of those systems are already under strain.<\/p>\n \u201cWhen these actions accumulate across landscapes and over time, they can significantly influence how landscapes evolve,\u201d Khan said.<\/p>\n That means losing biodiversity is more than a conservation problem \u2013 it can also alter the landscape itself.<\/p>\n Animals will keep remodeling the planet<\/p>\n Some of the strongest animal effects have received the least scientific attention, especially changes that prepare ground for later erosion.<\/p>\n In freshwater habitats, some of the biggest changes involved mixing and structuring the ground, yet these conditioning effects have drawn limited attention.<\/p>\n Livestock were barely represented, with only two domestic taxa in the available evidence, so their role remains largely unresolved.<\/p>\n Better measurements across common species, everyday behaviors, and longer timescales would show whether today\u2019s totals are only the beginning.<\/p>\n Animals keep remodeling the planet in ordinary, cumulative ways, not as rare curiosities but as routine forces in living systems.<\/p>\n Future land management<\/a> will work better when it treats wildlife as part of the processes moving soil, water, and sediment.<\/p>\n The study is published in the Journal of Geophysical Research: Earth Surface<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"A new analysis has found that wild animals alter soil and sediment movement far more strongly than scientists…\n","protected":false},"author":2,"featured_media":368250,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[85,46,141],"class_list":{"0":"post-368249","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-science","8":"tag-il","9":"tag-israel","10":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/368249","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/comments?post=368249"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/368249\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media\/368250"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media?parent=368249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/categories?post=368249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/tags?post=368249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}