V\u011bdci odhaduj\u00ed, \u017ee 80 procent zemsk\u00e9ho povrchu nyn\u00ed nese stopy lidsk\u00fdch aktivit, od silnic a plodin a\u017e po v\u011b\u017ee mobiln\u00edch telefon\u016f. Toto roz\u0161\u00ed\u0159en\u00e9 vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy m\u00e1 v\u00fdznamn\u00e9 d\u016fsledky pro ekosyst\u00e9my planety.<\/p>\n\n
Studie ukazuj\u00ed, \u017ee spole\u010dnost vyu\u017e\u00edv\u00e1 st\u00e1le v\u011bt\u0161\u00ed pod\u00edl biologick\u00fdch zdroj\u016f planety, aby uspokojila lidsk\u00e9 pot\u0159eby. To vyvol\u00e1v\u00e1 obavy, \u017ee v\u00fdsledn\u00e9 environment\u00e1ln\u00ed zm\u011bny mohou naru\u0161it p\u0159irozen\u00e9 funkce suchozemsk\u00fdch ekosyst\u00e9m\u016f a ohrozit jejich dlouhodobou schopnost udr\u017eet \u017eivot na Zemi.<\/p>\n\n
Zem\u011bd\u011blstv\u00ed je dnes dominantn\u00ed formou lidsk\u00e9ho vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy, p\u0159i\u010dem\u017e asi 35 procent ve\u0161ker\u00e9 nezamrzl\u00e9 p\u016fdy se nyn\u00ed vyu\u017e\u00edv\u00e1 k p\u011bstov\u00e1n\u00ed plodin a chovu hospod\u00e1\u0159sk\u00fdch zv\u00ed\u0159at. To p\u0159edstavuje v\u00fdznamn\u00fd n\u00e1r\u016fst oproti pouh\u00fdm 7 procent\u016fm v roce 1700.<\/p>\n\n
Na intenzit\u011b vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy tak\u00e9 z\u00e1le\u017e\u00ed, proto\u017ee intenzivn\u011bj\u0161\u00ed postupy spot\u0159ebov\u00e1vaj\u00ed v\u00edce zdroj\u016f. Modern\u00ed zem\u011bd\u011blstv\u00ed nap\u0159\u00edklad zdvojn\u00e1sobilo glob\u00e1ln\u00ed sklizn\u011b obil\u00ed za posledn\u00edch 40 let, ale pouze roz\u0161\u00ed\u0159en\u00edm zem\u011bd\u011blsk\u00e9 p\u016fdy o 12 procent. Tento zv\u00fd\u0161en\u00fd v\u00fdnos byl dosa\u017een pomoc\u00ed nov\u00fdch odr\u016fd obil\u00ed, chemick\u00fdch hnojiv, mechanizace a zavla\u017eov\u00e1n\u00ed, ale vedl tak\u00e9 k v\u011bt\u0161\u00edmu po\u0161kozen\u00ed \u017eivotn\u00edho prost\u0159ed\u00ed, v\u010detn\u011b degradace p\u016fdy, zv\u00fd\u0161en\u00e9ho pou\u017e\u00edv\u00e1n\u00ed pesticid\u016f a zne\u010di\u0161t\u011bn\u00ed vody.<\/p>\n\n
Ned\u00e1vn\u00e1 studie sestavila prostorov\u011b explicitn\u00ed mapy, kter\u00e9 ukazuj\u00ed nejen typy m\u00edstn\u00edho vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy po cel\u00e9m sv\u011bt\u011b, ale tak\u00e9 mno\u017estv\u00ed energie z biomasy \u2013 neboli p\u0159irozen\u00e9 produktivity \u2013 spot\u0159ebovan\u00e9 r\u016fzn\u00fdmi zp\u016fsoby vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy. V\u00fdsledky uk\u00e1zaly, \u017ee lid\u00e9 vyu\u017e\u00edvaj\u00ed 25 procent trofick\u00e9 energie dostupn\u00e9 ve v\u0161ech suchozemsk\u00fdch ekosyst\u00e9mech, p\u0159esto\u017ee jsou pouze jedn\u00edm z milion\u016f druh\u016f na planet\u011b.<\/p>\n\n
Jin\u00e1 studie nazna\u010duje, \u017ee zem\u011bd\u011blsk\u00e1 p\u016fda planety m\u016f\u017ee b\u00fdt k\u0159eh\u010d\u00ed, ne\u017e se d\u0159\u00edve myslelo. Konven\u010dn\u00ed zem\u011bd\u011blsk\u00e9 metody zalo\u017een\u00e9 na orb\u011b dramaticky urychluj\u00ed glob\u00e1ln\u00ed erozi p\u016fdy rychlost\u00ed 10 a\u017e 100kr\u00e1t vy\u0161\u0161\u00ed, ne\u017e je rychlost vytv\u00e1\u0159en\u00ed nov\u00e9 p\u016fdy.<\/p>\n\n
To znamen\u00e1, \u017ee ornice by mohla b\u00fdt odstran\u011bna za pouh\u00fdch p\u00e1r stovek a\u017e p\u00e1r tis\u00edc let. I kdy\u017e sou\u010dasn\u00e1 m\u00edra eroze nemus\u00ed b\u00fdt okam\u017eit\u011b patrn\u00e1, je to probl\u00e9m, kter\u00fd by m\u011bl spole\u010dnost znepokojovat v n\u00e1sleduj\u00edc\u00edch n\u011bkolika stolet\u00edch.<\/p>\n\n
Aby se zabr\u00e1nilo erozi p\u016fdy, odborn\u00edci doporu\u010duj\u00ed p\u0159ijmout bezorebn\u00e9 zem\u011bd\u011blstv\u00ed, kter\u00e9 se z\u0159\u00edk\u00e1 pou\u017e\u00edv\u00e1n\u00ed pluhu k obracen\u00ed p\u016fdy. Tento p\u0159\u00edstup \u010din\u00ed ornici m\u00e9n\u011b n\u00e1chylnou k erozi a nab\u00edz\u00ed dal\u0161\u00ed v\u00fdhody, v\u010detn\u011b zlep\u0161en\u00e9 \u00farodnosti p\u016fdy a zv\u00fd\u0161en\u00e9ho ukl\u00e1d\u00e1n\u00ed uhl\u00edku.<\/p>\n\n
V\u011bdci po mnoho let p\u0159edpokl\u00e1daj\u00ed, \u017ee eroze p\u016fdy zp\u016fsoben\u00e1 zem\u011bd\u011blstv\u00edm hraje roli v hladin\u00e1ch uhl\u00edku v atmosf\u00e9\u0159e. P\u0159esn\u00e1 povaha t\u00e9to souvislosti v\u0161ak nen\u00ed dob\u0159e zn\u00e1ma. N\u011bkter\u00e9 studie do\u0161ly k z\u00e1v\u011bru, \u017ee glob\u00e1ln\u00ed eroze p\u016fdy uvol\u0148uje do atmosf\u00e9ry zna\u010dn\u00e9 mno\u017estv\u00ed uhl\u00edku, zat\u00edmco jin\u00e9 zjistily zna\u010dn\u00fd efekt \u201epohlcova\u010de\u201c uhl\u00edku.<\/p>\n\n
Ned\u00e1vn\u00e1 studie vyu\u017e\u00edvaj\u00edc\u00ed novou analytickou metodu zjistila, \u017ee glob\u00e1ln\u00ed zem\u011bd\u011blsk\u00e1 eroze p\u016fdy m\u00e1 minim\u00e1ln\u00ed vliv na hladiny uhl\u00edku v atmosf\u00e9\u0159e. Uhl\u00edk zachycuje, ale pouze fragment, v mno\u017estv\u00ed v\u00fdrazn\u011b ni\u017e\u0161\u00edm, ne\u017e uv\u00e1d\u011bly n\u011bkter\u00e9 p\u0159edchoz\u00ed odhady.<\/p>\n\n
Dopad lidsk\u00fdch aktivit na suchozemsk\u00e9 ekosyst\u00e9my je nepopirateln\u00fd. Roz\u0161\u00ed\u0159en\u00e1 p\u0159em\u011bna p\u016fdy na zem\u011bd\u011blskou p\u016fdu, intenzita postup\u016f vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy a v\u00fdsledn\u00e1 eroze p\u016fdy p\u0159isp\u00edvaj\u00ed ke zm\u011bn\u00e1m \u017eivotn\u00edho prost\u0159ed\u00ed, kter\u00e9 ohro\u017euj\u00ed dlouhodobou udr\u017eitelnost \u017eivota na Zemi. Pochopen\u00ed t\u011bchto dopad\u016f a zav\u00e1d\u011bn\u00ed udr\u017eiteln\u00fdch postup\u016f vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy je z\u00e1sadn\u00ed pro budoucnost na\u0161\u00ed planety.<\/p>","protected":false},"excerpt":{"rendered":"
Obrovsk\u00e1 stopa: Jak lidsk\u00e9 aktivity ohro\u017euj\u00ed zdrav\u00ed ekosyst\u00e9m\u016f Vyu\u017e\u00edv\u00e1n\u00ed p\u016fdy a lidsk\u00fd dopad V\u011bdci odhaduj\u00ed, \u017ee 80 procent zemsk\u00e9ho povrchu nyn\u00ed nese stopy lidsk\u00fdch aktivit, od silnic a plodin a\u017e…<\/p>\n","protected":false},"author":2,"featured_media":24882,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[38],"tags":[16643,640,3399,120,5715,287],"class_list":["post-12314","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environmental-science","tag-land-use","tag-human-impact","tag-soil-erosion","tag-sustainability","tag-ecosystem-health","tag-agriculture"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=12314"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12314\/revisions"}],"predecessor-version":[{"id":24883,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12314\/revisions\/24883"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/24882"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=12314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=12314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=12314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}