DOCSLIB.ORG

Appendix E.8 Identification of Kangaroo Rats Through Morphometric Ecological, and Genetic Analysis

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Appendix E.8 Identification of Kangaroo Rats Through Morphometric Ecological, and Genetic Analysis Appendix E.8 Identification of Kangaroo Rats Through Morphometric Ecological, and Genetic Analysis California Flats Solar Project Identification of Kangaroo Rats through Morphometric, Ecological, and Genetic Analyses Project # 3308 Prepared for: California Flats Solar, LLC 135 Main Street, 6th Floor San Francisco, CA 94105 Prepared by: H. T. Harvey & Associates October 2013 Cal Poly Technology Park, Bldg. 83, Suite 1B San Luis Obispo, CA 93407 Ph: 805.756.7400 F: 805.756.7441 Executive Summary The California Flats Solar Project (Project) is a 280-megawatt photovoltaic solar power plant proposed for development in southeastern Monterey County, California. When approved, the solar facility and related operations infrastructure will be built on approximately 1037 hectares (2562 acres) (Project site) of the 29,137-hectare (72,000-acre) Jack Ranch, which is a working cattle ranch. The overall development will include improvements to an existing access road and its connection to State Route 41 (access road/Hwy 41 improvement areas). Together, the Project site and access road/Hwy 41 improvement areas constitute the 1058-hectare (2615-acre) Project impact area (PIA), where all direct, Project-related impacts will occur. A biological study area (BSA) was delineated around the PIA, within which most Project-related biological surveys and assessments are being conducted. The Project site is located within a landscape dominated by gently rolling terrain and grasslands, interspersed with several, mostly ephemeral, riparian corridors and drainages. Numerous wildlife species are known to occur in the region, some of which have been identified as candidate, sensitive, or special-status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Wildlife (CDFW) and/or U.S. Fish and Wildlife Service (USFWS). In particular, the endangered giant kangaroo rat (Dipodomys ingens) has been reported to occur within the Cholame Valley and the endangered Tipton kangaroo rat (Dipodomys nitratoides nitratoides) is known to occur within the region. In addition, the short-nosed kangaroo rat (D. n. brevinasus), a CDFW Species of Special Concern, has been documented to occur east of the Project site. In addition, Heermann’s kangaroo rat (Dipodomys heermanni) is known from this region as is the potential for the narrow-faced kangaroo rat (Dipodomys venustus sanctiluciae) to occur, neither of which has been identified as a special-status species. Therefore, the purpose of our survey effort was to characterize the occurrence of kangaroo rat species and to confirm the species identification of the kangaroo rats and other small mammals occurring within the Project site and along the access road. The results reported here along with the results of previous wildlife surveys conducted throughout the Project site and access road provide strong evidence the only species of kangaroo rat present on the site is the Heermann’s kangaroo rat. The small mammal trapping survey resulted in the capture of 36 kangaroo rats. Morphometric measurements taken in the field of 36 kangaroo rats captured during focused trapping efforts indicated that none of the kangaroo rats trapped were Tipton, short-nosed, or giant kangaroo rats. A genetic analysis of the trapped specimens confirmed that all of the trapped individuals were Heermann’s kangaroo rats. California Flats Solar Project H. T. Harvey & Associates i Small Mammal Trapping Survey October 2013 Table of Contents Section 1.0 Introduction ............................................................................................................................................. 4 Section 2.0 Methods .................................................................................................................................................... 7 2.1 Study Area .......................................................................................................................................................... 7 2.2 Survey Methods ................................................................................................................................................ 7 2.2.1 Trapping Survey ...................................................................................................................................... 7 2.2.2 Genetic Analysis ...................................................................................................................................... 7 Section 3.0 Results ..................................................................................................................................................... 10 3.1 Trapping Survey .............................................................................................................................................. 10 3.2 Genetic Analysis ............................................................................................................................................. 11 Section 4.0 Discussion............................................................................................................................................... 14 4.1 Ecological and Morphological Characteristics ........................................................................................... 14 4.1.1 Short-nosed and Tipton Kangaroo Rats ........................................................................................... 14 4.1.2 Heermann’s Kangaroo Rat .................................................................................................................. 14 4.1.3 Narrow-faced Kangaroo Rat ............................................................................................................... 15 4.1.4 Giant Kangaroo Rat ............................................................................................................................. 15 4.2 Genetic Analysis ............................................................................................................................................. 17 Section 5.0 Conclusion .............................................................................................................................................. 18 5.1 Short-nosed and Tipton Kangaroo Rats ..................................................................................................... 18 5.2 Narrow-faced Kangaroo Rat ........................................................................................................................ 18 5.3 Giant Kangaroo Rat ....................................................................................................................................... 18 5.4 Heermann’s Kangaroo Rat............................................................................................................................ 18 Section 6.0 References ............................................................................................................................................... 19 Appendix A. Datasheets and Photographs of Kangaroo Rats Trapped at the California Flats Solar Project Site, August 2013 .................................................................................................................................. 21 Figures and Tables Figure 1. Occurrences of Special-status Species within a 32 km Radius of the Project Site .................................. 6 Figure 2. Trapping Survey Locations within the Project Site and along the Access Road ..................................... 8 Figure 3. Phylogenetic Tree of Kangaroo Rats Sampled from the Project Site with Reference Species............................................................................................................................................................... 13 Table 1. Small Mammal Trapping Survey Results, California Flats Solar Project, August 2013 ......................... 10 Table 2. Position of Distinguishing Base Pairs and the Nucleotide State for Each Species................................. 11 Table 3. Morphometrics of Kangaroo Rat Species Potentially Occurring within the Project Area .................... 15 Table 4. Morphometric Characteristics of Giant Kangaroo Rats, Northern Carrizo Plain .................................. 16 California Flats Solar Project H. T. Harvey & Associates ii Small Mammal Trapping Survey October 2013 Contributors Brian Boroski, Ph.D., Vice President and Senior Wildlife Ecologist—Principal-in-Charge Daniel G. Duke, J.D., Associate, Senior Regulatory Specialist Robert K. Burton, Ph.D., Senior Ecologist, Project Manager Howard O. Clark, Jr., M.S., Senior Ecologist Dou-Shaun Yang, Ph.D., Geneticist/Wildlife Ecologist California Flats Solar Project H. T. Harvey & Associates iii Small Mammal Trapping Survey October 2013 Section 1.0 Introduction The California Flats Solar Project (Project) is a 280-megawatt photovoltaic solar power plant proposed for development in southeastern Monterey County, California. When approved, the solar facility and related operational infrastructure will be built on approximately 1037 hectares (2562 acres) (Project site) of private ranchland. The 29,137-hectare (72,000-acre) Jack Ranch is a working cattle ranch located in an unincorporated area of southeastern Monterey County and northeastern San Luis Obispo County, near the borders of Kings and Fresno counties. The Project will include construction, installation, and operation of energy-related infrastructure (e.g., solar panels, inverters, substations, and new power poles and transmission
Load more

Recommended publications
  • Fleas (Siphonaptera) Infesting Giant Kangaroo Rats (Dipodomys Ingens) on the Elkhorn and Carrizo Plains, San Luis Obispo County, California
    SHORT COMMUNICATION Fleas (Siphonaptera) Infesting Giant Kangaroo Rats (Dipodomys ingens) on the Elkhorn and Carrizo Plains, San Luis Obispo County, California STEPHEN P. TABOR/ DANIEL F. WILLIAMS,2 DAVID}. GERMAN0,2 3 AND REX E. THOMAS J. Med. Entomol. 30(1): 291-294 (1993) ABSTRACT The giant kangaroo rat, Dipodomys ingens (Merriam), has a limited distri­ bution in the San Joaquin Valley, CA. Because of reductions in its geographic range, largely resulting from humans, the species was listed as an endangered species in 1980 by the California Fish and Game Commission. As part of a study of the community ecology of southern California endangered species, including D. ingens, we were able to make flea collections from the rats when they were trapped and marked for population studies. All but one of the fleas collected from the D. ingens in this study were Hoplopsyllus anomalus, a flea normally associated with ground squirrels (Sciuridae). It has been suggested that giant kangaroo rats fill the ground squirrel niche within their range. Our data indicate that this role includes a normal association with Hoplopsyllus anomalus. KEY WORDS Dipodomys ingens, Hoplopsyllus anomalus, population studies THE GIANT KANGAROO RAT, Dipodomys ingens the only flea known from D. ingens. We found no (Merriam), is the largest of the kangaroo rats and additional information on collection records from the largest North American heteromyid. The his­ D. ingens. Therefore, we took the opportunity to torical range of the species lies along the western collect and identify fleas from D. ingens as part of side of the San Joaquin Valley, CA from the a larger study on the effects of drought, grazing Tehachapi Mountains on the southern extremity by livestock, and humans on a community of in San Luis Obispo, Kern, and Santa Barbara endangered species that includes populations of counties to the southern tip of Merced County D.
    [Show full text]
  • Translocating Endangered Kangaroo Rats in the San Joaquin Valley of California: Recommendations for Future Efforts
    90 CALIFORNIA FISH AND GAME Vol. 99, No. 2 California Fish and Game 99(2):90-103; 2013 Translocating endangered kangaroo rats in the San Joaquin Valley of California: recommendations for future efforts ERIN N. TENNANT*, DAVID J. GERMANO, AND BRIAN L. CYPHER Department of Biology, California State University, Bakersfield, CA 93311 USA (ENT, DJG) Endangered Species Recovery Program, California State University – Stanislaus, P.O. Box 9622, Bakersfield, CA 93389 USA (BLC) Present address of ENT: Central Region Lands Unit, California Department of Fish and Wildlife, 1234 E. Shaw Ave. Fresno, CA 93710 USA *Correspondent: [email protected] Since the early 1990s, translocation has been advocated as a means of mitigating impacts to endangered kangaroo rats from development activities in the San Joaquin Valley. The factors affecting translocation are numerous and complex, and failure rates are high. Based on work we have done primarily with Tipton kangaroo rats and on published information on translocations and reintroductions, we provide recommendations for future translocations or reintroductions of kangaroo rats. If the recommended criteria we offer cannot be satisfied, we advocate that translocations not be attempted. Translocation under less than optimal conditions significantly reduces the probability of success and also raises ethical questions. Key words: Dipodomys heermanni, Dipodomys ingens, Dipodomys nitratoides, reintroduction, San Joaquin Valley, Tipton kangaroo rat, translocation ________________________________________________________________________ Largely due to habitat loss, several species or subspecies of kangaroo rats (Dipodomys spp.) endemic to the San Joaquin Valley of California have been listed by the state and federal governments as endangered. These include the giant kangaroo rat (D. ingens), and two subspecies of the San Joaquin kangaroo rat (D.
    [Show full text]
  • Dipodomys Ingens)
    Species Status Assessment Report for the Giant Kangaroo Rat (Dipodomys ingens) Photo by Elizabeth Bainbridge Version 1.0 August 2020 Prepared by the U.S. Fish and Wildlife Service August 2020 GKR SSA Report – August 2020 EXECUTIVE SUMMARY The U.S. Fish and Wildlife Service listed the giant kangaroo rat (Dipodomys ingens) as endangered under the Endangered Species Act in 1987 due to the threats of habitat loss and widespread rodenticide use (Service 1987, entire). The giant kangaroo rat is the largest species in the genus that contains all kangaroo rats. The giant kangaroo rat is found only in south-central California, on the western slopes of the San Joaquin Valley, the Carrizo and Elkhorn Plains, and the Cuyama Valley. The preferred habitat of the giant kangaroo rat is native, sloping annual grasslands with sparse vegetation (Grinnell, 1932; Williams, 1980). This report summarizes the results of a species status assessment (SSA) that the U. S. Fish and Wildlife Service (Service) completed for the giant kangaroo rat. To assess the species’ viability, we used the three conservation biology principles of resiliency, redundancy, and representation (together, the 3Rs). These principles rely on assessing the species at an individual, population, and species level to determine whether the species can persist into the future and avoid extinction by having multiple resilient populations distributed widely across its range. Giant kangaroo rats remain in fragmented habitat patches throughout their historical range. However, some areas where giant kangaroo rats once existed have not had documented occurrences for 30 years or more. The giant kangaroo rat is found in six geographic areas (units), representing the northern, middle, and southern portions of the range.
    [Show full text]
  • Rats, Kangaroo
    Volney W. Howard, Jr. Professor of Wildlife Science Department of Fishery and KANGAROO RATS Wildlife Sciences New Mexico State University Las Cruces, New Mexico 88003 Fig. 1. The Ord’s kangaroo rat, Dipodomys ordi Identification and Range Fumigants Damage Prevention and There are 23 species of kangaroo rats Control Methods Aluminum phosphide and gas car- (genus Dipodomys) in North America. tridges are registered for various Fourteen species occur in the lower 48 Exclusion burrowing rodents. states. The Ord’s kangaroo rat (D. ordi, Fig. 1) occurs in 17 US states, Canada, Rat-proof fences may be practical only Trapping and Mexico. Other widespread species for small areas of high-value crops. Live traps. include the Merriam kangaroo rat Cultural Methods Snap traps. (D. merriami), bannertail kangaroo rat (D. spectabilis), desert kangaroo rat Plant less palatable crops along field Other Methods (D. deserti), and Great Basin kangaroo edges and encourage dense stands rat (D. microps). of rangeland grass. Use water to flush kangaroo rats from burrows. Repellents Kangaroo rats are distinctive rodents with small forelegs; long, powerful None are registered. hind legs; long, tufted tails; and a pair Toxicants of external, fur-lined cheek pouches similar to those of pocket gophers. Zinc phosphide. They vary from pale cinnamon buff to a dark gray on the back with pure white underparts and dark markings PREVENTION AND CONTROL OF WILDLIFE DAMAGE — 1994 Cooperative Extension Division Institute of Agriculture and Natural Resources University of Nebraska - Lincoln United States Department of Agriculture Animal and Plant Health Inspection Service Animal Damage Control B-101 Great Plains Agricultural Council Wildlife Committee their burrows for storage.
    [Show full text]
  • Population Genetics of the Endangered Giant Kangaroo Rat
    Population Genetics of the Endangered Giant Kangaroo Rat, Dipodomys ingens, in the Southern San Joaquin Valley Nicole C. Blackhawk, B.S. A Thesis Submitted to the Department of Biology California State University, Bakersfield In Partial Fulfillment for the Degree of Masters of Science Summer 2013 Copyright By Nicole Cherri Blackhawk 2013 Summer 2013 Population Genetics of the Endangered Giant Kangaroo Rat, Dipodomys ingens, in the Southern San Joaquin Valley Nicole C. Blackhawk This thesis has been accepted on behalf of the Department of Biology by their supervisory committee: 1 Population Genetics of the Endangered Giant Kangaroo Rat, Dipodomys ingens, in the Southern San Joaquin Valley Nicole C. Blackhawk Department of Biology, California State University, Bakersfield Abstract The Giant Kangaroo Rat (Dipodomys ingens) is a federally and state-listed endangered species, endemic to the San Joaquin Valley, Carrizo and Elkhorn Plains, and the Cuyama Valley. Populations of the endangered Giant Kangaroo Rat (Dipodomys ingens) have decreased over the past 100 years because of habitat fragmentation and isolation. Changes in the population structure that can occur due to habitat fragmentation can significantly affect the population size and the dispersal of these animals. Dr. David Germano and I collected small ear clippings from male and female Giant Kangaroo Rats from six sites along the southern San Joaquin Valley to determine the genetic population structure of this species in this part of their range. We predicted that geographic distance and isolation of populations would decrease genetic relatedness compared to populations closer together. Having a better understanding of the genetic structure in this species will help with conservation actions, such as translocating individuals within the range of the species.
    [Show full text]
  • The Great Farmer-Engineers of Our Deserts
    BY LAURA PRUGH KANGAROO RATS The Great Farmer-Engineers Of Our Deserts It took all night, but all of the grains were trans- the annoyance of being bullied. Using a series of ported from the haystack in the field to an un- GKR and cattle exclosures, we are learning how derground silo. If this sounds like the work of a cattle impact GKR, and how both GKR and cattle stealthy, paranoid farmer, you might be right affect plants and other species. Iabout that. This is, in fact, a most extraordinary So now we know that kangaroo rats are key- farmer. In addition to his nocturnal and subter- stone species in arid regions, but what are they ranean tendencies, he will never drink a drop of exactly? We can rule out two things: kangaroo water in his life. This industrious little fellow is a rats are neither kangaroos nor rats. Found exclu- kangaroo rat. sively in the arid grasslands and deserts of west- JOHN ROSER Perhaps a farmer isn’t the best analogy for a ern North America, kangaroo rats are heteromyid kangaroo rat. Sure, they churn and fertilize the soil, mow down rodents, and they are actually more closely related to beavers than vegetation, gather seeds into hay piles to dry, and then store them they are to common rats and house mice. Kangaroo rats emerged as for future use. But farming is just the beginning—they are really a distinct group during the Miocene era 13-16 million years ago, a more like engineers, ecosystem engineers. By excavating extensive period that underwent spectacular geological transformations such burrow systems known as precincts, kangaroo rats provide ref- as the uprising of the Sierra Nevada range and creation of Nevada’s uges for squirrels, reptiles, and insects.
    [Show full text]
  • WSN Short Program 2013 4
    Western Society of Naturalists Meeting Program Oxnard, CA Nov. 7-10, 2013 1 Western Society of Naturalists Treasurer President ~ 2013 ~ Andrew Brooks Michael Graham Dept of Ecology, Evolution and Moss Landing Marine Labs Website Marine Biology 8272 Moss Landing Rd www.wsn-online.org UC Santa Barbara Moss Landing, CA 95039 Santa Barbara, CA 93106 [email protected] Secretariat [email protected] Michael Graham Scott Hamilton President-Elect Member-at-Large Diana Steller Sean Anderson Steven Morgan Moss Landing Marine Laboratories CSU Channel Islands Bodega Marine Laboratory 8272 Moss Landing Rd One University Drive P.O Box 247 Moss Landing, CA 95039 Camarillo, CA 93012 Bodega, Bay, CA 94923 Corey Garza [email protected] [email protected] CSU Monterey Bay Seaside, CA 93955 [email protected] 94TH ANNUAL MEETING NOVEMBER 7-10, 2013 IN OXNARD, CALIFORNIA Registration and Information Welcome! The registration desk will be open Thurs 1800-2000, Fri-Sat 0730-1800, and Sun 0800-1000. Registration packets will be available at the registration table for those members who have pre-registered. Those who have not pre-registered but wish to attend the meeting can pay for membership and registration (with a $20 late fee) at the registration table. Unfortunately, banquet tickets cannot be sold at the meeting because the hotel requires final counts of attendees well in advance. The Attitude Adjustment Hour (AAH) is included in the registration price, so you will only need to show your badge for admittance. WSN t-shirts and other merchandise can be purchased or picked up at the WSN Student Committee table.
    [Show full text]
  • Translocating Endangered Kangaroo Rats in the San Joaquin Valley Of
    90 CALIFORNIA FISH AND GAME Vol. 99, No. 2 California Fish and Game 99(2):90-103; 2013 7UDQVORFDWLQJHQGDQJHUHGNDQJDURRUDWVLQWKH6DQ-RDTXLQ 9DOOH\RI&DOLIRUQLDUHFRPPHQGDWLRQVIRUIXWXUHHIIRUWV ERIN N. TENNANT*, DAVID J. GERMANO, AND BRIAN L. CYPHER 'HSDUWPHQWRI%LRORJ\&DOLIRUQLD6WDWH8QLYHUVLW\%DNHUV¿HOG&$86$ (17'-* Endangered Species Recovery Program, California State University – Stanislaus, P.O. Box %DNHUV¿HOG&$86$ %/& Present address of ENT: Central Region Lands Unit, California Department of Fish and Wildlife, 1234 E. Shaw Ave. Fresno, CA 93710 USA *Correspondent: [email protected] Since the early 1990s, translocation has been advocated as a means of mitigating impacts to endangered kangaroo rats from development activities in the San Joaquin Valley. The factors affecting translocation are numerous and complex, and failure rates are high. Based on work we have done primarily with Tipton kangaroo rats and on published information on translocations and reintroductions, we provide recommendations for future translocations or reintroductions of kangaroo rats. If the recommended FULWHULDZHRIIHUFDQQRWEHVDWLV¿HGZHDGYRFDWHWKDWWUDQVORFDWLRQVQRWEH DWWHPSWHG7UDQVORFDWLRQXQGHUOHVVWKDQRSWLPDOFRQGLWLRQVVLJQL¿FDQWO\ reduces the probability of success and also raises ethical questions. Key words: Dipodomys heermanni, Dipodomys ingens, Dipodomys nitratoides, reintroduction, San Joaquin Valley, Tipton kangaroo rat, translocation ________________________________________________________________________ Largely due to habitat loss, several species or subspecies of kangaroo rats (Dipodomys spp.) endemic to the San Joaquin Valley of California have been listed by the state and federal governments as endangered. These include the giant kangaroo rat (D. ingens), and two subspecies of the San Joaquin kangaroo rat (D. nitratoides), both of which occur in the San Joaquin Desert portion of the valley (Germano et al. 2011) and currently persist on only 2–4% of their historic ranges (Williams and Germano 1992).
    [Show full text]
  • Population Studies of Endangered Kangaroo Rats and Blunt-Nosed Leopard Lizards in the Carrizo Plain Natural Area, California
    Front and Back Covers: Giant Kangaroo Rat (Dipodomys ingens). Photos by Daniel F. Wil- liams. STATE OF CALIFORNIA THE RESOURCES AGENCY DEPARTMENT OF FISH AND GAME WILDLIFE MANAGEMENT DIVISION NONGAME BIRD AND MAMMAL SECTION POPULATION STUDIES OF ENDANGERED KANGAROO RATS AND BLUNT-NOSED LEOPARD LIZARDS IN THE CARRIZO PLAIN NATURAL AREA, CALIFORNIA ABSTRACT From July 1987 through December 1991, we studied interactions between cattle, the plant community, giant kangaroo rats (Dipodomys ingens), and blunt-nosed leopard lizards (Gumbelia sila) in the Carrizo Plain Natural Area, with lesser efforts on short-nosed kangaroo rats (D. nitratoides brevinasus) and San Joaquin antelope squirrels (Ammospermophilus nelsoni). The main study sites were on the Elkhorn Plain, San Luis Obispo County, with additional sites on the Carrizo Plain, San Luis Obispo County, and along Panache Creek in Fresno County, California. Drought prevailed during the precipitation years 1986-87, 1988-89, 1989-90, and into late March 1991, while 1987-88 had > average rainfall. Drought limited livestock grazing to a period from November 1987 to June 1989. Herbaceous plant productivity ranged from 12.8 kg/ha (11.5 lb/ac) during severest drought to 1,807 kg/ha (1,620 lb/ac) in 1991, following late spring rains. Productivity was slight in 1989 (60 kg/ha, 53.8 lb/ac) with little seed production. In 1990, the annual crop failed and there was no seed production. Cat- tle browsed heavily on shrubs between autumn 1988 and summer 1989. Herbaceous mulch was reduced to about 808 kg/ha (725 lb/ac) by grazing in 1989, and fell to 88.4 kg/ha (79.2 lb/ac) in 1990.
    [Show full text]
  • University of California Santa Cruz Conservation
    UNIVERSITY OF CALIFORNIA SANTA CRUZ CONSERVATION BIOGEOGRAPHY, MECHANISMS OF DECLINE, AND CLIMATE RELATIONSHIPS OF CALIFORNIA WILDLIFE A dissertation submitted in partial satisfaction of the requirements for the degree of DOCTOR OF PHILOSOPHY in ECOLOGY AND EVOLUTIONARY BIOLOGY by Joseph A. E. Stewart September 2018 The Dissertation of Joseph A. E. Stewart is approved: Professor A. Marm Kilpatrick Professor Barry Sinervo Professor Kristy Kroeker Professor M. Tim Tinker Dr. David Wright Dr. James Thorne Lori Kletzer Vice Provost and Dean of Graduate Studies Table of Contents Table of Contents iii List of Figures iv List of Tables ix Abstract xii Acknowledgements xiii Introduction 1 Chapter 1 — Revisiting the past to foretell the future: summer temperature 7 and habitat area predict pika extirpations in California Chapter 2 — Apparent climate-mediated loss and fragmentation of core 50 habitat of the American pika in the Northern Sierra Nevada, California Chapter 3 — A climate change vulnerability assessment for twenty 88 California mammal taxa Chapter 4 — Habitat restoration opportunities, climatic niche contraction, 216 and conservation biogeography in California's San Joaquin Desert iii List of Figures 1.1 Location and occupancy status of 67 historical pika sites in California. 16 1.2 Pika occupancy as a function of the best predictor variables. 24 1.3 Map of predicted pika occupancy status under 6 climate scenarios for 2070. 26 1.S1 Illustration of the method used set historical site centroid locations. 40 1.S2 Historical photo retake from ‘4 miles southwest of McDonald Peak’, Lassen Co., CA. 42 1.S2 Historical photo retake from Emerald Lake, Lassen Co., CA.
    [Show full text]
  • Giant Kangaroo Rat Dispersion Analysis ABBY RUTROUGH, Department of Wildlife, Humboldt State University, 1 Harpst St, Arcata, CA 95521
    Giant Kangaroo Rat Dispersion Analysis ABBY RUTROUGH, Department of Wildlife, Humboldt State University, 1 Harpst St, Arcata, CA 95521. DYLAN SCHERTZ, Department of Wildlife, Humboldt State University, 1 Harpst St, Arcata, CA 95521. December 5th, 2014 The giant kangaroo rat (Dipodomys ingens) is an endangered species endemic to southern California. Originally found throughout most of the southern central valley, the population is now fragmented and found in less than five percent of its historical range (USFWS 2010). Adapted to desert conditions, the giant kangaroo rat lives in colonies of burrows known as precincts. Typically, each burrow is occupied by a single kangaroo rat, thus areal counts of burrows yield an excellent estimation of population size (Bean et al. 2014). We conducted our analysis on the population located in the Carrizo Plain National Monument. After digitizing burrows from National Agriculture Imagery Program (NAIP) imagery, we used a Ripley’s K multi-distance cluster analysis to determine the dispersion of the giant kangaroo rat across different spatial scales. Figure 1. A locator map showing the Carrizo Plain within the state of California. (Source: US Census Bureau, United States Geological Survey (USGS). Spatial reference: North American Datum (NAD) 83, Universal Transverse Mercator (UTM) Zone 10 North). Figure 2. A locator map showing the Carrizo Plain National Monument and the study area. (Source: USGS, Caltrans. Spatial reference: NAD 83 Datum, UTM Zone 10 North). METHODS We used Esri’s ArcGIS to digitize giant kangaroo rat burrows from a 2012 1 meter NAIP image. Points were used to indicate burrows, while polygons were created around areas where burrows could not be accurately digitized.
    [Show full text]
  • Complete List of Amphibian, Reptile, Bird and Mammal Species in California
    Complete List of Amphibian, Reptile, Bird and Mammal Species in California California Department of Fish and Game Sept. 2008 (updated) This list represents all of the native or introduced amphibian, reptile, bird and mammal species known in California. Introduced species are marked with “I”, harvest species with “HA”, and vagrant species or species with extremely limited distributions with *. The term “introduced”, as used here, represents both accidental and intentional introductions. Subspecies are not included on this list. The most current list of species and subspecies with special management status is available from the California Natural Diversity Database (CNDDB) Taxonomy and nomenclature used within the list are the same as those used within both the CNDDB and CWHR software programs and data sets. If a discrepancy exists between this list and the ones produced by CNDDB, the CNDDB list can be presumed to be more accurate as it is updated more frequently than the CWHR data set. ________________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ AMPHIBIA (Amphibians) CAUDATA (Salamanders) AMBYSTOMATIDAE (Mole Salamanders and Relatives) Long-toed Salamander Ambystoma macrodactylum Tiger Salamander Ambystoma tigrinum I California Tiger Salamander Ambystoma californiense Northwestern Salamander Ambystoma gracile RHYACOTRITONIDAE (Torrent or Seep Salamanders) Southern Torrent Salamander Rhyacotriton
    [Show full text]