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Par exemple, les \u00e9crevisses am\u00e9ricaines et les mollusques bivalves supportent une grande amplitude thermique et une eau de qualit\u00e9 m\u00e9diocre.<\/p>\n\n\n\n
Les relev\u00e9s effectu\u00e9s indiquent une qualit\u00e9 hydro-biologique moyenne du Lez (Indice Biologique Global Normalis\u00e9 IBGN 10).<\/p>\n\n\n\n
Au laboratoire<\/h2>\n\n\n\n
Au laboratoire de chimie, les \u00e9l\u00e8ves ont analys\u00e9 les \u00e9chantillons d’eau pr\u00e9lev\u00e9e dans la rivi\u00e8re ; la concentration en dioxyg\u00e8ne dissous, la Demande Biochimique en Oxyg\u00e8ne (DBO5), le pH et la pr\u00e9sence d’ions nitrate.<\/p>\n\n\n\n Les analyses chimiques r\u00e9v\u00e8lent une eau du Lez assez riche en dioxyg\u00e8ne dissous (> 6 mg\/L), pauvre en mati\u00e8res organiques biod\u00e9gradables (DBO5 < 3 mg\/L), l\u00e9g\u00e8rement acide (pH6,5) et sans ion nitrate. <\/p>\n\n\n\n Cependant une temp\u00e9rature \u00e9lev\u00e9e (> 22\u00b0C) de l’eau de la rivi\u00e8re ne permettra pas d’introduire des truites (fario et arc-en-ciel) dans le Lez.<\/p>\n\n\n\n Cette d\u00e9marche scientifique et pluridisciplinaire a \u00e9t\u00e9 appr\u00e9ci\u00e9e des \u00e9l\u00e8ves. Ils se sont bien appropri\u00e9s la question locale puis ont propos\u00e9 quelques solutions techniques pertinentes qu’ils ont ensuite mises en pratique.<\/p>\n\n\n\n Dans un cadre scientifique et pluridisciplinaire en biologie \u00e9cologie et chimie, les \u00e9l\u00e8ves de premi\u00e8re baccalaur\u00e9at professionnel Conduite de Productions Horticoles (CPH) et Technicien Conseil Vente Univers Jardinerie (TCVUJ) ont […]<\/p>\n","protected":false},"author":19,"featured_media":7875,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"0","ocean_second_sidebar":"0","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"0","ocean_custom_header_template":"0","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"0","ocean_menu_typo_font_family":"0","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"0","omw_enable_modal_window":"enable","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[3],"tags":[42,22,23],"class_list":["post-7865","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-formation","tag-pluridisciplinarite","tag-sortie-pedagogique","tag-travaux-pratiques","entry","has-media"],"jetpack_featured_media_url":"https:\/\/www.hdebalzac.fr\/wp-content\/uploads\/2023\/10\/H1V1-Lez-031023.jpg","views":"","publishpress_future_action":{"enabled":false,"date":"2026-05-12 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En pluridisciplinarit\u00e9<\/h2>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"