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Middle Fork Project AQ 12 – Special-Status Amphibian and Aquatic Reptiles Technical Study Plan Report Overview. March 10, 2008. Study Objectives. Identify and map potential habitat for CRLF and FYLF in the study area.

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slide1

Middle Fork ProjectAQ 12 – Special-Status Amphibian and Aquatic Reptiles Technical Study Plan Report Overview

March 10, 2008

study objectives
Study Objectives
  • Identify and map potential habitat for CRLF and FYLF in the study area.
  • Document the distribution and abundance of CRLF populations in the study area, as required by USFWS.
  • Document the distribution and abundance of FYLF populations in the study area.
  • Document the timing and length of FYLF breeding season.
  • Identify existing data and obtain new data necessary to develop habitat suitability criteria (HSC) for FYLF.
  • Characterize the water stage, velocity, and temperature of various flow regimes as it relates to FYLF habitat through coordination with the instream flow and water temperature studies.
study objectives1
Study Objectives
  • Document the presence of potential WPT nesting habitat near Project reservoirs and potential Project betterment inundation zones.
  • Document the presence of WPT during CRLF and FYLF surveys.
aq 12 special status amphibian and aquatic reptile study objectives and related
AQ 12 – Special-Status Amphibian and Aquatic ReptileStudy Objectives and Related

Study Elements and Reports

CRLF Study Objectives

Identify and map potential habitat and document the distribution and abundance of populations in the study area, as required by

U.S. Fish and Wildlife Service

(USFWS).

FYLF Study Objectives

Identify and map potential habitat and document the distribution and abundance of populations in the study area.

Document the timing and length of breeding season.

Develop habitat suitability criteria (HSC).

Characterize the water stage, velocity, and temperature of various flow regimes as it relates to habitat through coordination with instream flow and water temperature studies.

WPT Study Objectives

Document the presence of potential nesting habitat near Project reservoirs and

potential Project betterment inundation

zones and document presence

during amphibian surveys.

Conduct USFWS protocol-level site assessment

Conduct 2007 Field Surveys

Identify and map known occurrences within one mile of the study area

Develop and GIS map of potential habitat around reservoirs and rivers

Conduct a field reconnaissance reservoir survey

of potential

habitat

Conduct 2007 Field Surveys

Identify and map known occurrences within one mile of the study area

Conduct a

field reconnaissance survey

Conduct Distribution & Abundance Surveys

Coordinate with AQ 1 - Instream Flow

Complete Habitat Characterization

Determine Timing and Length of Breeding Season

Develop Habitat Suitability

Criteria

Document 2007 findings in a Site Assessment Report included in this Amphibian Report

Document 2007 findings in this Amphibian Report

Consult with Aquatic Technical Working Group (TWG) & USFWS

Document 2007 findings in this Amphibian Report

Evaluate water temperatures near potential habitat

Consult with Aquatic TWG

Determine Stage, Velocity, and Temperature Effects of Various Flow Regimes

Determine if protocol-level

surveys are needed.

Conduct Project Effects Analysis

Determine if additional

limited-scope surveys are needed

(i.e. breeding timing)

Coordinate with AQ 1 - Instream Flow

Coordinate with AQ 4 - Water Temperatures

Complete 2008 CRLF surveys in areas requested by USFWS, if needed

Complete 2008 FYLF Contingency

Field Surveys, if needed

Conduct Project

Effects Analysis

Document 2008 Results in

Amphibian Report (2009)

Document 2008 FYLF Results in

Amphibian Report (2009)

slide6

Potential Contingency Studies

  • Potential FYLF Data Gaps and Need for Limited Scope Surveys
    • Determine any ambiguities in the analysis of data collected in 2007 preclude meeting the study objectives (distribution and length of breeding season).
    • If FYLF are not found at a site during the first year of surveys, the site will be revisited or another site may be surveyed if the Aquatic TWG determines it is necessary.
      • Determine data to be collected and the number of times a site is revisited, if necessary.
survey results
Survey Results
  • Foothill Yellow-legged Frog
    • Habitat Characterization
    • Distribution and Abundance Surveys
    • Timing and Length of Breeding Season
    • Habitat Suitability Criteria Development
    • Coordination to Determine Stage and Velocity Effects
foothill yellow legged frog breeding season
Foothill Yellow-legged Frog Breeding Season

Annual Profile of Average Daily Water Temperatures at all breeding locations

2007 Breeding Season*: May 10 – June 5

*Dates inferred from observed developmental stage of eggs

foothill yellow legged frog breeding season1
Foothill Yellow-legged Frog Breeding Season

Annual Profile of Average Daily Water Temperatures at all non-breeding locations

foothill yellow legged frog assessment of stage velocity effects
Foothill Yellow-legged Frog Assessment of Stage & Velocity Effects
  • Use HSC for in-stream flow modeling at:
    • 2 peaking reach sites (MF 4.8, MF 14.1)
    • 2 bypass reach sites (MF 26.1, 3.5)
    • 2 reference reach sites (NF 35.7, NFMF 2.3) (x-sect only)
  • Eggmass validation data collected in Spring, 2008
western pond turtle
Western Pond Turtle
  • 8 incidental observations
    • 6 along MFAR below Ralston (2 hatchlings on Otter Ck)
    • 2 on NFAR
  • GIS Analysis of potential nesting habitat
    • Slope less than 15 degrees
    • Southern aspect
    • 150 ft buffer
    • Less than 6000 ft elevation
  • Field Reconnaissance
    • Off-channel ponds within CRLF 1 mile buffer zone, but no ponds within the smaller WPT buffer zone.
    • Reservoir GIS habitat validation
western pond turtle potential nesting habitat2
Western Pond Turtle Potential Nesting Habitat
  • GIS and Field Validation Analysis of Potential Habitat near Reservoirs