2017 Knowledge Assessment - Revision history

Cellsworth at 21:13, 4 February 2020

2020-02-04T21:13:44Z

Cellsworth at 21:10, 4 February 2020

2020-02-04T21:10:20Z

Cellsworth at 20:47, 4 February 2020

2020-02-04T20:47:06Z

Cellsworth at 18:55, 4 February 2020

2020-02-04T18:55:35Z

Cellsworth at 18:24, 4 February 2020

2020-02-04T18:24:41Z

Cellsworth at 18:22, 4 February 2020

2020-02-04T18:22:32Z

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Cellsworth at 18:20, 4 February 2020

2020-02-04T18:20:43Z

Cellsworth at 17:30, 4 February 2020

2020-02-04T17:30:47Z

Cellsworth at 16:26, 4 December 2019

2019-12-04T16:26:07Z

Cellsworth at 21:03, 23 January 2019

2019-01-23T21:03:55Z

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 each resource topic.
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 *Monitor Lake Powell at an interval determined by the results of an Protocols Evaluation Panel or Science Advisors Panel, analyze data collected in the past at key locations to determine trends.
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← Older revision		Revision as of 21:10, 4 February 2020
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	*Research needed on management action recommended to improve wilderness characteristics of Glen and Grand Canyons.		*Research needed on management action recommended to improve wilderness characteristics of Glen and Grand Canyons.
	*Helicopter use should be for emergencies only		*Helicopter use should be for emergencies only
		+
		+	'''Riparian vegetation'''
		+	*Continued ground-survey and aerial image monitoring of changes to herbaceous and woody species and non-native spp. to track shifts in Tamarix defoliation and subsequent infilling by other species. Compare the CRe flora to that of Cataract Canyon to get an general idea of how these somewhat similar sections of the Colorado River compare - would require extra field work and collaboration with Canyonlands NP and the Northern Colorado Plateau Network. Measures of community heterogeneity need to be tied to a specific management question, so an appropriate measure can be used.
		+	*Continue work using flow-response guilds to examine likely functional group changes due to different flow regimes and likely functional group changes that impacted historic sandbar change (two current projects). Study functional group response/shifts and model using flow scenario.
		+	*Continue research and monitoring that improves our understanding of how vegetation impacts fluvial and aeolian sediment transport.
		+	*Reexamine the areal extent and composition of marsh habitats using the more recent areal imagery and ground-surveys.
		+	*Develop a science-based vegetation management (e.g., restoration, rehabilitation, or other active management) plan with measurable goals. Allocate time and money based on goals to track success. What to do with the dead, standing Tamarix may be a topic to consider in the future.
		+	*Using genetic studies and field data, we could examine if HFE's are selecting for clonal species and genotypes.
		+
		+	'''Sediment'''
		+	*Continue monitoring and expand sample sizes to increased confidence in strength and direction determinations.
		+	*Develop study plan for proactive and extended duration HFE's before implementation.
		+	*If vegetation management occurs, monitor sandbar response in future high flows.
		+	*Continue monitoring sand storage. If persistent declines in storage occur, considering revising action.
		+
		+	'''Tribal Cultural Values'''
		+	*none provided
		+
		+	'''Water quality'''
		+	*Reinstall temperature string on the Lake Powell side of GCD. Monitor forebay of GCD on a monthly basis to determine trends and analyze data collected in the past. It is difficult to assess a status and trend without identifying specific scenarios of concern. Gather data necessary to determine lake hydrodynamics including temperature data at the inflows (Colorado River and San Juan River). Utilize the results of an Protocols Evaluation Panel or Science Advisors Panel to determine location and frequency.
		+	*Monitor forebay of GCD on a monthly basis to determine trends. Monitor Lake Powell at an interval determined by the results of an Protocols Evaluation Panel or Science Advisors Panel, analyze data collected in the past with special emphasis on metalimnetic oxygen minima and CBOD. More thoroughly monitor DO concentrations in Lake Powell during HFE (e.g., twice daily data, coupled with profile at dam)-- jet tubes significantly increase the DO in the river, would be good to understand the combination of DO from penstock and DO from jet tubes.
		+	*Monitor Lake Powell at an interval determined by the results of an Protocols Evaluation Panel or Science Advisors Panel, analyze data collected in the past. Measure conductivity of inflow of Lake Powell at Colorado River and San Juan River.
		+	*Analyses for nutrients should be routinely collected monthly (as scheduled) above and below GCD (forebay and Lees Ferry.. and further downstream). Timing of riverine nutrient sampling should be standardized. Given the extremely low concentrations of phosphorus in this system, the contract laboratory should be consulted to see if a new method might be able to lower the detection limits. More time should be spent analyzing the historical nutrient data collected in Lake Powell. Some protocol should also be developed to establish the representativeness of the Lake Powell-Wahweap station penstock depth sample in reflecting the water chemistry and biology exiting Lake Powell. Follow PEP recommended targeted sampling to better understand the drivers of nutrient patterns in the lake and the nutrient limitation regime below GCD.
		+	*Samples for phytoplankton, zooplankton, and chlorophyll should be collected monthly above and below GCD. Monitor Lake Powell at an interval determined by the results of an Protocols Evaluation Panel or Science Advisors Panel, analyze data collected in the past at key locations to determine the impact of quagga mussels on the reservoir and other trends. There is a need to determine whether the data collected in Lake Powell is correlated to the data at Lees Ferry.
		+	*Data should be collected above and below GCD and in Lake Powell at an adequate frequency to determine status and trends as determined by the results of an Protocols Evaluation Panel or Science Advisors Panel. Analyze data collected in the past. Explore work conducted by other researchers on mercury in Lake Powell.
		+	*Monitor Lake Powell at an interval determined by the results of an Protocols Evaluation Panel or Science Advisors Panel, analyze data collected in the past at key locations to determine trends.
		+

@@ Line 219: / Line 219: @@
 ==[http://gcdamp.com/index.php?title=FOOD_BASE Aquatic Food Base] ==
 *[[Media:GCDAMP 2017 KA Aquatic Food Base Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Aquatic Food Base LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=CULTURAL Archaeological & Cultural Resources] ==
 *[[Media:GCDAMP 2017 KA Archaeological & Cultural Resources Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Archaeological & Cultural Resources LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=Humpback_Chub_Page Humpback Chub] ==
 *[[Media:GCDAMP 2017 KA Humpback Chub Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Humpback Chub LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=HYDROPOWER Hydropower & Energy] ==
 *[[Media:GCDAMP 2017 KA Hydropower & Energy Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Hydropower & Energy LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=Nonnative_Invasive_Aquatic_Species Invasive Fish Species] ==
 *[[Media:GCDAMP 2017 KA Invasive Fish Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Invasive Fish LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=FISH Other Native Fish Species]==
@@ Line 247: / Line 247: @@
 ==[http://gcdamp.com/index.php?title=FISHERY Rainbow Trout Fishery] ==
 *[[Media:GCDAMP 2017 KA Rainbow Trout Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Rainbow Trout LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=RECREATION Recreational Experience]==
 *[[Media:GCDAMP 2017 KA Recreational Experience Drivers & Constraints FINAL 2017-04-07.pdf|  Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Recreational Experience LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=Riparian_Vegetation Riparian Vegetation] ==
 *[[Media:GCDAMP 2017 KA Riparian Vegetation Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Riparian Vegetation LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=GCDAMP_Sediment Sediment]==
 *[[Media:GCDAMP 2017 KA Sediment Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Sediment LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 ==[http://gcdamp.com/index.php?title=Tribal_Resources Tribal Cultural Values]==
@@ Line 270: / Line 270: @@
 ==[http://gcdamp.com/index.php?title=WATER_QUALITY Water Quality] ==
 *[[Media:GCDAMP 2017 KA Water Quality Drivers & Constraints FINAL 2017-04-07.pdf| Drivers & Constraints]]
 *[[Media:GCDAMP 2017 KA Water Quality LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 |-

@@ Line 368: / Line 368: @@
 *Monitor trout population dynamics in response to changes in nutrients. This appears to be a promising area of research to better understand what drives RBT abundance, growth, and condition.
 *Continue to monitor trout population dynamics both in the LCR inflow area and the Lees Ferry Sport Fishery
-*This analysis suggests that higher flow in winter and lower flow in spring increases the number of trout in a system. If managers wish to decrease recruitment, they may wish to increase flow volume in spring during a
+*This analysis suggests that higher flow in winter and lower flow in spring increases the number of trout in a system. If managers wish to decrease recruitment, they may wish to increase flow volume in spring during a time when trout are spawning or when they are in their early life history stages.
 time when trout are spawning or when they are in their early life history stages.
 *Need to determine the efficacy of TMFs (magnitude, duration, frequency).
 *This analysis suggests that fish density does have a negative influence on trout size, so if managers wish to increase adult rainbow trout size they might take steps to decrease density/recruitment into the population
@@ Line 380: / Line 379: @@
 *Discontinue Redd counts and place greater emphasis on sampling and estimating abundance and survival of Age0 recruits.
 *Evaluate the relationship between Rainbow Trout Maximum Size and Prey-size and abundance and Temperature in CR could be very valuable for understanding the factors that control this resource: 1). Continue monitoring the resource characteristic by field sampling efforts designed to estimate maximum size. 2). Apply modelling tools (such as drift-foraging bioenergetics or Net Energy Intake models) to predict how changing biological or physical conditions influence the maximum size that rainbow trout can attain. 3). Use both empirical studies and modeling approaches to build an explicit understanding of how management actions influence the resource. 4). Consider whether to reduce or simplify study, given angler perceptions that bioenergetic model results are already solid.

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← Older revision		Revision as of 18:20, 4 February 2020
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	*Consider benthic monitoring in FY18-20 to track downstream progression of quagga.		*Consider benthic monitoring in FY18-20 to track downstream progression of quagga.
	*Consider new research studies of macrophyte-invertebrate interactions to better understand role of macrophytes in driving changes in invertebrate prey base, especially in LF.		*Consider new research studies of macrophyte-invertebrate interactions to better understand role of macrophytes in driving changes in invertebrate prey base, especially in LF.
		+
		+	'''Archaeological and cultural resources'''
		+	*Resume monitoring w/NPS and Tribes. Re-establish monitoring program using NPS/ASMIS protocols.
		+	*Expand stage elevation model for HFEs to include GLCA Reach.
		+	*Establish and implement targeted monitoring pre and post HFE's.
		+	*Support NPS and Tribal monitoring efforts and coordination with GRCA CRMP and law enforcement patrol; integrate monitoring information with education and mitigation efforts.
		+	*Continue submerged monitoring of Spencer Steamboat.
		+
		+	'''Humpback chub'''
		+	*none provided
		+
		+	'''Hydropower and energy'''
		+	*Make sure to consider hydrology and water use and how they affect resource characteristics. Make sure these resources are considered when planning for changes in water use.
		+	*Keep the analysis updated past LTEMP.
		+	*Move forward on cost/benefit analysis on adding generation on the bypass tubes.
		+	*Look for ways of increasing reservoir elevation at Lake Powell.
		+	*Look for ways to conduct experiments coincident with power production.
		+	*Identify maintenance costs for bypass tubes/valves and clarify funding source for this maintenance.
		+	*Evaluate whether extended duration HFEs result in larger and longer‐lasting sandbars in critical reaches
		+
		+	''' Invasive fish species'''
		+	*Maintain or reduce current spawning numbers of Brown Trout in Lees Ferry Reach to protect Rainbow Trout and Humpback Chub fishery
		+	*Reduce conditions that promote increased recruitment and numbers of Brown Trout
		+	*Continue fish weir at Bright Angel Creek, and possibly other tributaries if Brown Trout spawning/recruitment is occurring there
		+	*Continue monitoring for rare-nonnatives
		+
		+	'''Other Native Fish Species'''
		+	*none provided
		+
		+	'''Rainbow trout fishery'''
		+	*Continue monitoring the recruitment of age0 fish that disperse from Lees Ferry into Marble Canyon during the late-summer and fall at Houserock Reach.
		+	*Monitor trout population dynamics in response to changes in nutrients. This appears to be a promising area of research to better understand what drives RBT abundance, growth, and condition.
		+	*Continue to monitor trout population dynamics both in the LCR inflow area and the Lees Ferry Sport Fishery
		+	*This analysis suggests that higher flow in winter and lower flow in spring increases the number of trout in a system. If managers wish to decrease recruitment, they may wish to increase flow volume in spring during a
		+	time when trout are spawning or when they are in their early life history stages.
		+	*Need to determine the efficacy of TMFs (magnitude, duration, frequency).
		+	*This analysis suggests that fish density does have a negative influence on trout size, so if managers wish to increase adult rainbow trout size they might take steps to decrease density/recruitment into the population
		+	*Consider actions which likely increase benthic production of invertebrates (the ultimate source of invertebrate drift), including the role nutrients play.
		+	*Consider implementation of Macroinvertebrate production flows and experimentally examine how flows influence the foodbase, which influences invertebrate drift availability and ultimately trout growth.
		+	*Use targeted trout management flows to test hypothesis, when conditions are appropriate (i.e. Brown trout control).
		+	*Research is needed to determine what is the major factor determining variation in aquatic preybase. As a response variable, trout need to be monitored for effects from high flow experiments and reservoir nutrient dynamics.
		+	*Annual recruitment of Age0 trout is a critical information for determining the likely trends in population growth. Need to reconcile the differences in recruitment found between RTELLS catch indices and mark-recapture estimates. Suggest re-estimating RTELLS capture probabilities since these have not been revised since 2007.
		+	*We suggest monitoring the movement of age-0 trout into Marble Canyon to assess future increases in trout abundance due to recruitment in Marble Canyon, as well as efficacy of Trout Management Flows to reduce recruitment events in Lees Ferry.
		+	*Discontinue Redd counts and place greater emphasis on sampling and estimating abundance and survival of Age0 recruits.
		+	*Evaluate the relationship between Rainbow Trout Maximum Size and Prey-size and abundance and Temperature in CR could be very valuable for understanding the factors that control this resource: 1). Continue monitoring the resource characteristic by field sampling efforts designed to estimate maximum size. 2). Apply modelling tools (such as drift-foraging bioenergetics or Net Energy Intake models) to predict how changing biological or physical conditions influence the maximum size that rainbow trout can attain. 3). Use both empirical studies and modeling approaches to build an explicit understanding of how management actions influence the resource. 4). Consider whether to reduce or simplify study, given angler perceptions that bioenergetic model results are already solid.

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-! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;"> Recommendations </h2>
+! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;"> Report Recommendations </h2>
 |-
 |style="color:#000;"|
@@ Line 306: / Line 306: @@
 *[[Media:GCDAMP 2017 KA Water Quality LTEMP Actions FINAL 2017-04-07.pdf| Effects of Experimental & Management Actions]]
 *[[Media:GCDAMP 2017 KA Water Quality Status & Trend FINAL 2017-04-07.pdf| Status & Trends]]
 |-

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 |style="color:#000;"|
 *[http://gcdamp.com/index.php?title=Portal:GCDAMP_Knowlege_Assessments Knowledge Assessments, Annual Reporting Meetings, and SCORE Reports Page]
 *[http://gcdamp.com/index.php?title=FY18-20_GCMRC_Triennial_Budget_and_Workplan FY18-20 GCDAMP Triennial Work Plan]

@@ Line 39: / Line 39: @@
 process and development of the next [http://gcdamp.com/index.php?title=FY18-20_GCMRC_Triennial_Budget_and_Workplan '''GCDAMP Triennial Work Plan for FY 2018-2020''']. This knowledge
 assessment is testing a methodology for better organizing, displaying, and communicating its findings,
-potentially to carry forward to guide future knowledge assessments as well. [https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17feb15/Knowledge%20Assessment.pdf]
+potentially to carry forward to guide future knowledge assessments as well. [https://www.usbr.gov/uc/progact/amp/amwg/2017-02-15-amwg-meeting/Attach_08.pdf]
 |}<!--
@@ Line 207: / Line 207: @@
 |style="color:#000;"|
-*[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17feb15/Attach_08.pdf Knowledge Assessment Update ]
+*[https://www.usbr.gov/uc/progact/amp/amwg/2017-02-15-amwg-meeting/Attach_08.pdf Knowledge Assessment Update ]
 *[[Media:GCDAMP 2017 Knowledge Assessment Webinar 2017-04-06.pdf| 2017 Knowledge Assessment Webinar 2017-04-06 ppt]]
-*[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17feb15/Knowledge%20Assessment.pdf AMWG: Knowledge Assessment Update ]
+*[https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/A4_Shanahan.pdf TWG: Review of the 2017 ARM and Discussion of Knowledge Assessment]
-*[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/A4_Shanahan.pdf TWG: Review of the 2017 ARM and Discussion of Knowledge Assessment]
 |-