{"id":7410,"date":"2023-04-18T14:45:59","date_gmt":"2023-04-18T18:45:59","guid":{"rendered":"https:\/\/severnsound.ca\/?page_id=7410"},"modified":"2023-04-24T14:13:26","modified_gmt":"2023-04-24T18:13:26","slug":"stream-invertebrates","status":"publish","type":"page","link":"https:\/\/www.severnsound.ca\/programs-projects\/monitoring\/streams-rivers\/stream-invertebrates\/","title":{"rendered":"Stream Invertebrates"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7410\" class=\"elementor elementor-7410\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-52ea1db2 elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"52ea1db2\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;shape_divider_bottom&quot;:&quot;mountains&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t<div class=\"elementor-shape elementor-shape-bottom\" data-negative=\"false\">\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 1000 100\" preserveAspectRatio=\"none\">\n\t<path class=\"elementor-shape-fill\" opacity=\"0.33\" d=\"M473,67.3c-203.9,88.3-263.1-34-320.3,0C66,119.1,0,59.7,0,59.7V0h1000v59.7 c0,0-62.1,26.1-94.9,29.3c-32.8,3.3-62.8-12.3-75.8-22.1C806,49.6,745.3,8.7,694.9,4.7S492.4,59,473,67.3z\"\/>\n\t<path class=\"elementor-shape-fill\" opacity=\"0.66\" d=\"M734,67.3c-45.5,0-77.2-23.2-129.1-39.1c-28.6-8.7-150.3-10.1-254,39.1 s-91.7-34.4-149.2,0C115.7,118.3,0,39.8,0,39.8V0h1000v36.5c0,0-28.2-18.5-92.1-18.5C810.2,18.1,775.7,67.3,734,67.3z\"\/>\n\t<path class=\"elementor-shape-fill\" d=\"M766.1,28.9c-200-57.5-266,65.5-395.1,19.5C242,1.8,242,5.4,184.8,20.6C128,35.8,132.3,44.9,89.9,52.5C28.6,63.7,0,0,0,0 h1000c0,0-9.9,40.9-83.6,48.1S829.6,47,766.1,28.9z\"\/>\n<\/svg>\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-wider\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-448b9c14\" data-id=\"448b9c14\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-652d68bc elementor-widget elementor-widget-heading\" data-id=\"652d68bc\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 26-03-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h1 class=\"elementor-heading-title elementor-size-default\">Stream Invertebrates<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ea1ff7d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ea1ff7d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-1db7b23\" data-id=\"1db7b23\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4936d52 elementor-widget elementor-widget-heading\" data-id=\"4936d52\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Tributary Ecosystem Health Monitoring Program<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0f51311 elementor-widget elementor-widget-text-editor\" data-id=\"0f51311\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 26-03-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>Stream benthic macroinvertebrate (BMI\u2019s) community composition has long been used to assess stream quality in the Severn Sound watershed. The Tributary Ecosystem Health Monitoring Program (TEHMP) has been ongoing since 1996 and utilizes standard qualitative and quantitative biomonitoring protocols within the tributaries of Severn Sound . The methods provide SSEA with a better understanding of presence and absence of species throughout the watershed, community densities, and significant trends over time, allowing us to evaluate tributary water quality.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-26f35ef\" data-id=\"26f35ef\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-599dae1 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"599dae1\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-839599a\" data-id=\"839599a\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-94b5c4f\" data-id=\"94b5c4f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c206547 elementor-widget elementor-widget-heading\" data-id=\"c206547\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Biomonitoring?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d4ed235 elementor-widget elementor-widget-text-editor\" data-id=\"d4ed235\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Biological monitoring or biomonitoring is the systematic use of living organisms and their responses to assess the aquatic environment. SSEA uses BMI\u2019s as the biological indicator of water quality in tributaries.<br \/><span style=\"font-style: inherit; font-weight: inherit; background-color: var(--ast-global-color-5); color: var(--ast-global-color-3);\"><br \/>BMI\u2019s, or water bugs, are aquatic bottom dwelling organisms without a backbone that live in the bottom sediments of tributaries. . They include such things as various larval stages of dragonflies, damselflies, mosquitoes, mayflies, and black flies, along with crayfish, snails, clams and aquatic worms. BMI\u2019s play an important role in decomposing organic matter, moving nutrients through the food web and providing a food source for fish .<\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-6509a3b elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"6509a3b\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-8821587\" data-id=\"8821587\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9543c3e elementor-widget elementor-widget-heading\" data-id=\"9543c3e\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Why does SSEA monitor benthic invertebrates?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f52c3a9 elementor-widget elementor-widget-text-editor\" data-id=\"f52c3a9\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Water quality indicators based on chemical or bacterial samples show conditions at a snapshot in time and do not always give a holistic picture of stream health. . Stream quality can change rapidly such as through pollution discharges or physical habitat destruction and if they are not ongoing, these changes may go undetected by intermittent chemistry sampling. BMI\u2019s are useful indicators of water quality because they live in the stream year-round or over multiple years within a relatively small habitat range, and they have varying tolerances to pollution. The presence or absence of different types of BMI\u2019s at a monitoring station can provide valuable information about tributary\u2019s health over time.<\/p><p>Changes in water quality lead to changes in the community composition , number of species present, and density. Polluted areas often only support a few pollution tolerant species while a diverse community with more pollution intolerant species would be found in unimpaired areas. This biomonitoring tool enables SSEA to locate where stewardship activities may be needed or areas to protect within the watershed.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-6c840b6\" data-id=\"6c840b6\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-fb2b4a8 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"fb2b4a8\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-858aa51\" data-id=\"858aa51\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b6296b2 elementor-widget elementor-widget-heading\" data-id=\"b6296b2\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Where does SSEA monitor benthos in the watershed?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d457fbc elementor-widget elementor-widget-text-editor\" data-id=\"d457fbc\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The SSEA monitors 24 long-term stations biennially, representing 10 subwatersheds ( Avon River, Coldwater River, Copeland Creek, Hogg Creek, North River, Silver Creek, Sturgeon River, Wye River, Bass Lake and Baxter Lake) Additional sites are monitored seasonally depending on projects within the watershed.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-44488ab\" data-id=\"44488ab\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a1f6a6e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a1f6a6e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-72c1f40\" data-id=\"72c1f40\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-3df183d\" data-id=\"3df183d\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-080e60b elementor-widget elementor-widget-heading\" data-id=\"080e60b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How does SSEA monitor benthos in the Severn Sound area?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dbb02f6 elementor-widget elementor-widget-text-editor\" data-id=\"dbb02f6\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>Two sampling protocols are used for the collection of benthic invertebrates. The first is a qualitative method that involves two people conducting a 15 minute search of all habitats in a 15 meter stream reach using a hand sieve and forceps . Habitats included sand, silt, gravel, rip-rap, large rocks, logs and vegetation. This method gives us information on the diversity of BMI\u2019s present at a site.<\/p><p>The second is a quantitative method using a t-sampler focusing on the riffle area of a stream. The open end of the sampler is placed into the current, the streambed substrate inside the t-sampler is agitated and the flow carries any invertebrates through the net and into the catch bottle. This method was selected to determine the density and diversity of BMI\u2019s within the set area of the t-sampler. It provides standardized comparisons between samples and sites and will show community changes over time.<\/p><p>Contents of the sieve or catch bottle are placed in a tray and all specimens are picked and preserved. SSEA conducts all sample identification in house, and samples are identified to family level..<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-c8e2e70 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"c8e2e70\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-63577268\" data-id=\"63577268\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-25a6065d elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"25a6065d\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-c2c2788\" data-id=\"c2c2788\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e006890 elementor-widget elementor-widget-text-editor\" data-id=\"e006890\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>For more information on TEHMP, contact:<\/strong><\/p><blockquote dir=\"ltr\"><p><strong>Paula Madill<\/strong>, Ecosystem Technologist<br \/><span style=\"color: #0066cc;\"><a href=\"mailto:pmadill@severnsound.ca\">pmadill@severnsound.ca<\/a><\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<br \/>705-534-7283 ext. 203<\/p><\/blockquote>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-5ea54d2f\" data-id=\"5ea54d2f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2afbb8d7 elementor-widget elementor-widget-image\" data-id=\"2afbb8d7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 26-03-2024 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"291\" height=\"300\" src=\"https:\/\/www.severnsound.ca\/wp-content\/uploads\/2023\/04\/SSEA_Madill_2023-291x300.jpg\" class=\"attachment-medium size-medium wp-image-7106\" alt=\"SSEA Ecosystem Technologist\" srcset=\"https:\/\/www.severnsound.ca\/wp-content\/uploads\/2023\/04\/SSEA_Madill_2023-291x300.jpg 291w, https:\/\/www.severnsound.ca\/wp-content\/uploads\/2023\/04\/SSEA_Madill_2023.jpg 600w\" sizes=\"(max-width: 291px) 100vw, 291px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\"><\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Stream Invertebrates Tributary Ecosystem Health Monitoring Program Stream benthic macroinvertebrate (BMI\u2019s) community composition has long been used to assess stream quality in the Severn Sound watershed. The Tributary Ecosystem Health Monitoring Program (TEHMP) has been ongoing since 1996 and utilizes standard qualitative and quantitative biomonitoring protocols within the tributaries of Severn Sound . The methods [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":4070,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Stream Invertebrates - Severn Sound Environmental Association<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.severnsound.ca\/programs-projects\/monitoring\/streams-rivers\/stream-invertebrates\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Stream Invertebrates - Severn Sound Environmental Association\" \/>\n<meta property=\"og:description\" content=\"Stream Invertebrates Tributary Ecosystem Health Monitoring Program Stream benthic macroinvertebrate (BMI\u2019s) community composition has long been used to assess stream quality in the Severn Sound watershed. 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