{"id":687,"date":"2024-08-21T09:54:13","date_gmt":"2024-08-21T07:54:13","guid":{"rendered":"https:\/\/lehrpfad.umwelt-campus.de\/stone-runs-and-screes\/"},"modified":"2025-09-10T08:24:36","modified_gmt":"2025-09-10T06:24:36","slug":"stone-runs-and-screes","status":"publish","type":"page","link":"https:\/\/lehrpfad.umwelt-campus.de\/en\/stone-runs-and-screes\/","title":{"rendered":"Stone runs and screes"},"content":{"rendered":"\n<div class=\"wp-block-uagb-container uagb-block-ddf63a6a alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-container uagb-block-d71b3bf5\">\n<h2 class=\"wp-block-heading\">Extreme conditions for an unusual life<\/h2>\n\n\n\n<figure class=\"wp-block-audio\"><audio controls src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/09\/223_1_eng.mp3\"><\/audio><\/figure>\n\n\n\n<p>A stone run is a large accumulation of stones at least the size of a head on steep slopes with an angle of inclination of at least 25 degrees. If the fragments are smaller, geologists speak of boulder or screes. Rock fragments on flatter terrain are called block fields.<\/p>\n\n\n\n<p>Boulder screes, called \u201eRosselhalden\u201c in the Hunsr\u00fcck region, were formed by frost weathering as a result of the alternation of freezing and thawing at exposed rock sites during and a er the last ice age. The bedrock at this site is quartz porphyry (rhyolite). In Hunsr\u00fcck-Hochwald National Park, the boulder screes consist of quartzite.<\/p>\n\n\n\n<p>The largely unwooded \u201eRosselhalden\u201c represent one of the last so-called primary habitats that have not been majorly altered by humans. Dryness, lack of nutrients and remarkable temperature differences characterise this extreme location.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_grafik.webp\" alt=\"\" style=\"box-shadow:none\"\/><\/figure>\n\n\n\n<figure class=\"wp-block-audio\"><audio controls src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/09\/223_2_eng.mp3\"><\/audio><\/figure>\n\n\n\n<p><strong>Stone run climate\r\n<\/strong>While a dry-warm climate with strong fluctuations prevails on the surface of the stone run, it is cooler on the inside and the climate is more balanced overall.<strong>\r\n<\/strong><\/p>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:30% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"401\" src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_1.webp\" alt=\"\" class=\"wp-image-455 size-full\" srcset=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_1.webp 400w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_1-300x300.webp 300w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_1-150x150.webp 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p><strong>Smooth snake<\/strong><br>Smooth snakes feed mainly on viviparous lizards and mice. They thus counteract the mass increase of the mice population. This snake is harmless to humans, but can bite when in danger.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:30% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"401\" src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_2.webp\" alt=\"\" class=\"wp-image-458 size-full\" srcset=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_2.webp 400w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_2-300x300.webp 300w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_2-150x150.webp 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p><strong>Common wall lizard<\/strong><br>Wall lizards warm themselves on sunlit rocks and use the gaps between blocks for shelter.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:30% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"401\" src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_3.webp\" alt=\"\" class=\"wp-image-457 size-full\" srcset=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_3.webp 400w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_3-300x300.webp 300w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_3-150x150.webp 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p><strong>Wolf spider<\/strong><br>Wolf spiders like to live in burrows in the ground or in rocks. They do not weave webs, but rather hunt insects at night, such as ground beetles, grasshoppers and fly larvae, but also other spiders, thanks to their well-developed eight eyes.<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-media-text is-stacked-on-mobile\" style=\"grid-template-columns:30% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"401\" src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_4.webp\" alt=\"\" class=\"wp-image-456 size-full\" srcset=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_4.webp 400w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_4-300x300.webp 300w, https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/223_4-150x150.webp 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p><strong>Map lichen<\/strong><br>Lack of soil substrate, strong temperature fluctuations and lack of water make life difficult for plants. However, a closer look reveals mainly lichens and some mosses.<\/p>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-e9c5f59b\">\n<div class=\"wp-block-uagb-info-box uagb-block-a99f778a uagb-infobox__content-wrap  uagb-infobox-icon-above-title uagb-infobox-image-valign-top hinweisbox\"><div class=\"uagb-ifb-content\"><div class=\"uagb-ifb-icon-wrap\"><div class=\"uagb-iconbox-icon-wrap uagb-infobox-shape-circle\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 384 512\"><path d=\"M112.1 454.3c0 6.297 1.816 12.44 5.284 17.69l17.14 25.69c5.25 7.875 17.17 14.28 26.64 14.28h61.67c9.438 0 21.36-6.401 26.61-14.28l17.08-25.68c2.938-4.438 5.348-12.37 5.348-17.7L272 415.1h-160L112.1 454.3zM191.4 .0132C89.44 .3257 16 82.97 16 175.1c0 44.38 16.44 84.84 43.56 115.8c16.53 18.84 42.34 58.23 52.22 91.45c.0313 .25 .0938 .5166 .125 .7823h160.2c.0313-.2656 .0938-.5166 .125-.7823c9.875-33.22 35.69-72.61 52.22-91.45C351.6 260.8 368 220.4 368 175.1C368 78.61 288.9-.2837 191.4 .0132zM192 96.01c-44.13 0-80 35.89-80 79.1C112 184.8 104.8 192 96 192S80 184.8 80 176c0-61.76 50.25-111.1 112-111.1c8.844 0 16 7.159 16 16S200.8 96.01 192 96.01z\"><\/path><\/svg><\/div><\/div><div class=\"uagb-ifb-title-wrap\"><h3 class=\"uagb-ifb-title\">Tips and measures<\/h3><\/div><div class=\"uagb-ifb-separator\"><\/div><p class=\"uagb-ifb-desc\">Collect rubble stones and pile them on sunny ground in the garden, creating many areas with gaps and crevices<br><br>Do not enter stone runs because of the risk of accidents and to protect the biotope<\/p><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Stone runs and screes<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>are extreme areas in terms of hydrological regime, temperature and nutrients.<\/li>\n\n\n\n<li>have an astonishing microclimate of their own.<\/li>\n\n\n\n<li>are home to particularly adaptable animals and plants.<\/li>\n<\/ul>\n<\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Your 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