1.0BROZhttps://broz.sk/en/rich600338<blockquote class="wp-embedded-content" data-secret="qCZmJPVEyr"><a href="https://broz.sk/en/removal-of-migration-barrier/">Removal of migration barrier</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://broz.sk/en/removal-of-migration-barrier/embed/#?secret=qCZmJPVEyr" width="600" height="338" title="“Removal of migration barrier” — BROZ" data-secret="qCZmJPVEyr" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://broz.sk/wp-includes/js/wp-embed.min.js </script> https://broz.sk/wp-content/uploads/2025/01/IMG-20241008-WA0005.jpg1600755Various types of man-made barriers such as dams, weirs, steps, fords, culverts, etc. create obstacles in streams and cause water levels to rise. This creates non-native lake ecosystems with many negative effects, above the barriers due to the slowing of the flow and below the barriers due to the disturbed water regime and sediment transport regime.