logging in or signing up forum charts ptuck Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 12 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: June 03, 2010 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Streams of Science : Chris Nagai Nick Foster Christen Dschankilic Streams of Science Slide 2: Pickering Watershed How We Didn’t Do It : How We Didn’t Do It Study Chemicals Precise indication of quality Brief snapshot Expensive Study fish Data represents greater time period Difficult to catch Collection can damage live samples How Did We Do It? : How Did We Do It? Study Benthic Macroinvertebrates Positives Represents good time period Good indication of quality Easy to collect Negatives Collection can damage samples Difficult to ID The Protocol : The Protocol Systematic set up of transects Notation of riparian data, etc Collection of sample with D-nets Randomized selection of insects to be counted Identify samples Credible : Credible Carefully followed protocol Protocol recognised by Citizen’s Environment Watch (CEW) as well as Conservation Authority Indices : Indices % Aquatic Worm %Midge %Sowbug # of Taxa %Snail %Dominant Taxa %EPT %Diptera %Insects Hilsenhoff Biotic Index (HBI) Based on these indices our streams can be rated unimpaired or possibly impaired Aquatic Worm % : Aquatic Worm % Indicates an area with low oxygen levels This makes it harder for other macroinvertebrates to survive A high percentage often indicates poor water quality Midge % : Midge % Midges are found in almost every type of habitat A high percentage of midges indicates unhealthy stream conditions However, their absence is often unexpected and can indicate potential damage of a stream. # of Taxa : # of Taxa A high number of taxa (groups) indicates good water quality This is because in order for a great variety of species to exist at the same site, there must be a diverse range in habitats. EPT : EPT This index consists of three groups of macroinvertebrates; mayflies, stoneflies, and caddisflies All three require high quality stream environments Thus, a high percentage of EPT indicates good water and habitat quality. HBI : HBI This index shows the nutrient levels of the stream It incorporates the tolerance value of each group to give a snap shot of the nutrient conditions A low HBI value implies low nutrient conditions A high HBI implies excessive nutrient conditions. Gandi : Gandi Possibly impaired (5 unimpaired, 2 possibly impaired, 3 impaired) Midge levels are declining and EPT is rising River appears improving Not enough bugs found, therefore technically not valid data Urfe : Urfe This year was found to be potentially impaired. 3 unimpaired 3 possibly impaired, 4 impaired Doing well in 2007 and 2008 Little Rouge : Little Rouge Unimpaired (7 unimpaired, 3 possibly impaired) River is improving EPT is starting to decline, Midges are on the rise River is good, but needs help to stay that way Slide 16: Box Grove Box Grove is possibly impaired (4 unimpaired, 1 possibly impaired, 5 impaired) Consistently large amounts of Midges with low EPT and poor HBI Small river next to subdivision under construction Rainbow trout nest found. Conclusion : Conclusion Our rivers appear to be improving from past years Action should be taken to keep it that way. Human activity like construction (Box Grove) can be detrimental You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
forum charts ptuck Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINTLite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 12 Category: Education License: All Rights Reserved Like it (0) Dislike it (0) Added: June 03, 2010 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... Premium member Presentation Transcript Streams of Science : Chris Nagai Nick Foster Christen Dschankilic Streams of Science Slide 2: Pickering Watershed How We Didn’t Do It : How We Didn’t Do It Study Chemicals Precise indication of quality Brief snapshot Expensive Study fish Data represents greater time period Difficult to catch Collection can damage live samples How Did We Do It? : How Did We Do It? Study Benthic Macroinvertebrates Positives Represents good time period Good indication of quality Easy to collect Negatives Collection can damage samples Difficult to ID The Protocol : The Protocol Systematic set up of transects Notation of riparian data, etc Collection of sample with D-nets Randomized selection of insects to be counted Identify samples Credible : Credible Carefully followed protocol Protocol recognised by Citizen’s Environment Watch (CEW) as well as Conservation Authority Indices : Indices % Aquatic Worm %Midge %Sowbug # of Taxa %Snail %Dominant Taxa %EPT %Diptera %Insects Hilsenhoff Biotic Index (HBI) Based on these indices our streams can be rated unimpaired or possibly impaired Aquatic Worm % : Aquatic Worm % Indicates an area with low oxygen levels This makes it harder for other macroinvertebrates to survive A high percentage often indicates poor water quality Midge % : Midge % Midges are found in almost every type of habitat A high percentage of midges indicates unhealthy stream conditions However, their absence is often unexpected and can indicate potential damage of a stream. # of Taxa : # of Taxa A high number of taxa (groups) indicates good water quality This is because in order for a great variety of species to exist at the same site, there must be a diverse range in habitats. EPT : EPT This index consists of three groups of macroinvertebrates; mayflies, stoneflies, and caddisflies All three require high quality stream environments Thus, a high percentage of EPT indicates good water and habitat quality. HBI : HBI This index shows the nutrient levels of the stream It incorporates the tolerance value of each group to give a snap shot of the nutrient conditions A low HBI value implies low nutrient conditions A high HBI implies excessive nutrient conditions. Gandi : Gandi Possibly impaired (5 unimpaired, 2 possibly impaired, 3 impaired) Midge levels are declining and EPT is rising River appears improving Not enough bugs found, therefore technically not valid data Urfe : Urfe This year was found to be potentially impaired. 3 unimpaired 3 possibly impaired, 4 impaired Doing well in 2007 and 2008 Little Rouge : Little Rouge Unimpaired (7 unimpaired, 3 possibly impaired) River is improving EPT is starting to decline, Midges are on the rise River is good, but needs help to stay that way Slide 16: Box Grove Box Grove is possibly impaired (4 unimpaired, 1 possibly impaired, 5 impaired) Consistently large amounts of Midges with low EPT and poor HBI Small river next to subdivision under construction Rainbow trout nest found. Conclusion : Conclusion Our rivers appear to be improving from past years Action should be taken to keep it that way. Human activity like construction (Box Grove) can be detrimental