Grazing Lands

Total Page:16

File Type:pdf, Size:1020Kb

Grazing Lands Effects of Agricultural Conservation Practices on Fish and Wildlife parasitism/ nests-nesting/ pastures/ productivity/ public abundances in agricultural fields adjacent to wide borders, relations/ status/ wildlife/ federal programs/ wild birds/ which likely resulted from enhanced waste grain foraging nature conservation/ natural resources/ agricultural opportunities. Given these benefits to wintering farmland economics (general)/ land development, land reform, and birds, we advocate the integration of herbaceous field utilization (macroeconomics)/ dickcissel/ grasshopper border habitat in agricultural landscapes, particularly sparrow/ meadowlark/ brown headed cowbird/ upland borders of enhanced width. sandpiper/ Kansas/ Riley County © Thomson Reuters Scientific Abstract: Most Conservation Reserve Program contracts expire in 1997 and approximately 70 per cent of CRP fields 293. Winter bird use of Conservation Reserve Program in Kansas may be converted into pastures. The authors fields harvested for biomass. compared bird use of CRP fields to their use of pastures. Murray, Les D. and Best, Louis B. Total avian abundance was greater in pastures than on Journal of the Iowa Academy of Science 113(1-2): CRP fields. Data on five species using these habitats are 45-48. (2006) provided. NAL Call #: Q11.J68; ISSN: 0896-8381 © NISC Descriptors: conservation/ ecology/ man-made habitat/ land zones/ Aves: conservation measures/ Conservation 292. Winter avian community and sparrow response to Reserve Program fields/ habitat utilization/ winter habitat field border width. use/ cultivated land habitat/ Iowa/ Appanose/ Lucas/ Conover, Ross R.; Burger, L. Wes; and Linder, Eric T. Monroe and Wayne counties/ Aves, Galliformes, Journal of Wildlife Management 71(6): 1917-1923. (2007) Phasianidae/ birds/ chordates/ vertebrates NAL Call #: 410 J827; ISSN: 0022-541X Abstract: As Conservation Reserve Program (CRP) Descriptors: conservation measures/ ecology/ man-made contracts expire, many fields may be returned to habitat/ land zones/ Aves: habitat management/ field border agricultural production. Growing switchgrass (Panicum width/ effect on winter community structure/ community virgatum) as a biomass fuel is an alternative to returning structure/ winter community structure/ field border width fields to rowcrops. CRP fields provide winter cover for birds, effects/ cultivated land habitat/ field border width effects on but the harvest of biomass Would remove most of the cover winter community structure/ Mississippi/ Sunflower County/ and affect bird use of the fields. We estimated winter bird Aves/ birds/ chordates/ vertebrates abundances in nonharvested, total-harvested, and partially Abstract: Transformations of agricultural practices in the (strip) harvested switchgrass fields in southern Iowa. Song southeastern United States have drastically reduced sparrows (Melospiza melodia) were observed only in strip- preexisting quantities of strip-cover habitat along field harvested fields and ring-necked pheasants (Phasianus margins. The National Conservation Buffer Initiative has colchicus) were observed only in nonharvested fields and promoted the establishment of herbaceous field borders to uncut areas of strip-harvested fields. American tree restore wildlife benefits once provided by such habitat. We sparrows (Spizella arborea) were observed in all three evaluated effects of native warm-season grass field border treatments, but abundances were not significantly different establishment and width on winter bird response. Narrow among treatments. Tree sparrows, however, were observed (approx. 8-m) field borders represented a marginal more often in uncut strips of strip-harvested fields than in improvement to non-bordered margins that were cropped cut strips, with 87% of observations in strip-harvested fields ditch to ditch, whereas wide (approx. 30-m) borders in uncut strips. Abundances in strip-harvested fields were in significantly enhanced total avian conservation value, general higher than abundances in rowcrop and CRP abundance, species richness, and sparrow abundance plantings in other studies. Strip-harvested switchgrass compared to non- or narrow borders. Furthermore, fields may be more beneficial in winter than total-harvested presence of wide borders altered bird use of row-crop fields, rowcrop, or idle CRP fields for some bird species. fields. We observed increased sparrow (Emberizidae) © Thomson Reuters Scientific Grazing Lands 294. Above ground invertebrate responses to land dwelling (pitfall traps) communities were quantitatively management differences in a central Kansas grassland. sampled from June-September 1998 and 1999. The Jonas, J. L.; Whiles, M. R.; and Charlton, R. E. responses of the whole arthropod community and two focal Environmental Entomology 31(6): 1142-1152. (2002) groups, Coleopteran families and Orthopteran species, to NAL Call #: QL461.E532; ISSN: 0046225X three land use types (brome fields, old fields, and native Descriptors: biological assessment/ Coleoptera/ Indicator prairies) were examined. Vegetation analyses reflected species/ Orthoptera/ bioindicator/ biomonitoring/ community clear differences among land use types. Bromus inermis response/ community structure/ invertebrate/ land Leyss, an exotic grass, and Andropogon gerardii Vitman, a management/ community structure/ macroinvertebrate/ native grass, dominated brome fields and native prairie United States/ Andropogon gerardii/ Bromus inermis/ sites, respectively. Old fields were composed of a mixture Coleoptera/ Orthoptera of native and exotic plant species. Coleopteran family Abstract: This article describes macroinvertebrate richness and diversity were significantly greater in native communities in a central Kansas grassland that were prairies than brome fields (P < 0.05), whereas orthopteran examined to assess their responses to differences in land species richness and diversity peaked in brome fields. management and explore their viability for biological Diversity and richness of all arthropod groups examined assessment of grasslands. Canopy (drop-trap) and ground- were significantly, positively correlated with plant species 74 Terrestrial Habitats: Grazing Lands diversity and richness in drop-trap samples (P < 0.05). 296. Adaptive management of prairie grouse: How do Coleopteran family diversity and richness in pitfall samples we get there? were positively correlated with abundance of native plants, Aldridge, C. L.; Boyce, M. S.; and Baydack, R. K. but orthopteran species diversity and richness were Wildlife Society Bulletin 32(1): 92-103. (2004) negatively correlated with native plant abundance. NAL Call #: SK357.A1W5; ISSN: 00917648 Coleopteran and orthopteran responses to land use Descriptors: adaptive management/ Alberta/ Centrocercus appeared linked to differences in management practices. urophasianus/ conservation plans/ grazing/ greater sage- Whereas coleopterans appeared most influenced by plant grouse/ habitat/ Manitoba/ policy planning/ prairie sharp- community composition, orthopterans showed sensitivity to tailed grouse/ Tympanuchus phasianellus/ gamebird/ mechanical disturbance associated with haying on native grassland/ habitat conservation/ prairie/ species prairie. Plant and arthropod group diversities were not conservation/ wildlife management/ Canada/ Manitoba/ consistently correlated, demonstrating that arthropod North America/ Centrocercus urophasianus/ groups can reflect differences in a landscape that may not Tympanuchus phasianellus be apparent from examining plant communities alone. Abstract: Managing prairie grouse has been largely a © 2008 Elsevier B.V. All rights reserved. reactive process without any "true" management experiments being implemented, thereby limiting our ability 295. Abundance and diversity of small mammals in to learn from management and enhance conservation exotic and reseeded native grasslands at Oakwood efforts for declining prairie grouse populations. In a few Lakes State Park. cases where the potential existed for a passive or active Gardner, Dawn M.; Jensen, Kent C.; Higgins, Kenneth F.; adaptive approach, monitoring was insufficient to detect Hansen, Nicole K.; and Huehl, Abbigayil A. effects of changes in management practices. Similar Proceedings of the South Dakota Academy of Science 84: problems appear to occur at planning stages in attempts to 109-117. (2005) implement adaptive management for prairie grouse NAL Call #: 500 So82; ISSN: 0096-378X populations, preventing proper consideration of sound Descriptors: conservation measures/ ecology/ community adaptive experiments that advance learning. Successful structure/ terrestrial habitat/ land zones/ Mammalia: habitat adaptive management begins with stakeholder gatherings management/ small taxa/ exotic grasslands/ reseeded following a policy planning process, which includes many grasslands/ relative abundance/ native grasslands/ species steps, beginning with goal identification and understanding diversity/ South Dakota/ Brookings County/ Oakwood Lakes of uncertainties and culminating in model simulations to Game Production Area/ Mammalia/ chordates/ mammals/ understand potential management policies. By following vertebrates this process, the opportunity to implement successful Abstract: Relative abundance and diversity of small management experiments can be enhanced. We discuss mammal populations in exotic and reseeded native the successes and failures of prairie grouse management grassland plots were evaluated during the fall of 2004 at using 2 case
Recommended publications
  • Herpetological Information Service No
    Type Descriptions and Type Publications OF HoBART M. Smith, 1933 through June 1999 Ernest A. Liner Houma, Louisiana smithsonian herpetological information service no. 127 2000 SMITHSONIAN HERPETOLOGICAL INFORMATION SERVICE The SHIS series publishes and distributes translations, bibliographies, indices, and similar items judged useful to individuals interested in the biology of amphibians and reptiles, but unlikely to be published in the normal technical journals. Single copies are distributed free to interested individuals. Libraries, herpetological associations, and research laboratories are invited to exchange their publications with the Division of Amphibians and Reptiles. We wish to encourage individuals to share their bibliographies, translations, etc. with other herpetologists through the SHIS series. If you have such items please contact George Zug for instructions on preparation and submission. Contributors receive 50 free copies. Please address all requests for copies and inquiries to George Zug, Division of Amphibians and Reptiles, National Museum of Natural History, Smithsonian Institution, Washington DC 20560 USA. Please include a self-addressed mailing label with requests. Introduction Hobart M. Smith is one of herpetology's most prolific autiiors. As of 30 June 1999, he authored or co-authored 1367 publications covering a range of scholarly and popular papers dealing with such diverse subjects as taxonomy, life history, geographical distribution, checklists, nomenclatural problems, bibliographies, herpetological coins, anatomy, comparative anatomy textbooks, pet books, book reviews, abstracts, encyclopedia entries, prefaces and forwords as well as updating volumes being repnnted. The checklists of the herpetofauna of Mexico authored with Dr. Edward H. Taylor are legendary as is the Synopsis of the Herpetofalhva of Mexico coauthored with his late wife, Rozella B.
    [Show full text]
  • Xenosaurus Tzacualtipantecus. the Zacualtipán Knob-Scaled Lizard Is Endemic to the Sierra Madre Oriental of Eastern Mexico
    Xenosaurus tzacualtipantecus. The Zacualtipán knob-scaled lizard is endemic to the Sierra Madre Oriental of eastern Mexico. This medium-large lizard (female holotype measures 188 mm in total length) is known only from the vicinity of the type locality in eastern Hidalgo, at an elevation of 1,900 m in pine-oak forest, and a nearby locality at 2,000 m in northern Veracruz (Woolrich- Piña and Smith 2012). Xenosaurus tzacualtipantecus is thought to belong to the northern clade of the genus, which also contains X. newmanorum and X. platyceps (Bhullar 2011). As with its congeners, X. tzacualtipantecus is an inhabitant of crevices in limestone rocks. This species consumes beetles and lepidopteran larvae and gives birth to living young. The habitat of this lizard in the vicinity of the type locality is being deforested, and people in nearby towns have created an open garbage dump in this area. We determined its EVS as 17, in the middle of the high vulnerability category (see text for explanation), and its status by the IUCN and SEMAR- NAT presently are undetermined. This newly described endemic species is one of nine known species in the monogeneric family Xenosauridae, which is endemic to northern Mesoamerica (Mexico from Tamaulipas to Chiapas and into the montane portions of Alta Verapaz, Guatemala). All but one of these nine species is endemic to Mexico. Photo by Christian Berriozabal-Islas. amphibian-reptile-conservation.org 01 June 2013 | Volume 7 | Number 1 | e61 Copyright: © 2013 Wilson et al. This is an open-access article distributed under the terms of the Creative Com- mons Attribution–NonCommercial–NoDerivs 3.0 Unported License, which permits unrestricted use for non-com- Amphibian & Reptile Conservation 7(1): 1–47.
    [Show full text]
  • 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]
  • REPTILIA: SQUAMATA: PHRYNOSOMATIDAE Sceloporus Poinsettii
    856.1 REPTILIA: SQUAMATA: PHRYNOSOMATIDAE Sceloporus poinsettii Catalogue of American Amphibians and Reptiles. Webb, R.G. 2008. Sceloporus poinsettii. Sceloporus poinsettii Baird and Girard Crevice Spiny Lizard Sceloporus poinsettii Baird and Girard 1852:126. Type-locality, “Rio San Pedro of the Rio Grande del Norte, and the province of Sonora,” restricted to either the southern part of the Big Burro Moun- tains or the vicinity of Santa Rita, Grant County, New Mexico by Webb (1988). Lectotype, National Figure 1. Adult male Sceloporus poinsettii poinsettii (UTEP Museum of Natural History (USNM) 2952 (subse- 8714) from the Magdalena Mountains, Socorro County, quently recataloged as USNM 292580), adult New Mexico (photo by author). male, collected by John H. Clark in company with Col. James D. Graham during his tenure with the U.S.-Mexican Boundary Commission in late Au- gust 1851 (examined by author). See Remarks. Sceloporus poinsetii: Duméril 1858:547. Lapsus. Tropidolepis poinsetti: Dugès 1869:143. Invalid emendation (see Remarks). Sceloporus torquatus Var. C.: Bocourt 1874:173. Sceloporus poinsetti: Yarrow “1882"[1883]:58. Invalid emendation. S.[celoporus] t.[orquatus] poinsettii: Cope 1885:402. Seloporus poinsettiii: Herrick, Terry, and Herrick 1899:123. Lapsus. Sceloporus torquatus poinsetti: Brown 1903:546. Sceloporus poissetti: Král 1969:187. Lapsus. Figure 2. Adult female Sceloporus poinsettii axtelli (UTEP S.[celoporus] poinssetti: Méndez-De la Cruz and Gu- 11510) from Alamo Mountain (Cornudas Mountains), tiérrez-Mayén 1991:2. Lapsus. Otero County, New Mexico (photo by author). Scelophorus poinsettii: Cloud, Mallouf, Mercado-Al- linger, Hoyt, Kenmotsu, Sanchez, and Madrid 1994:119. Lapsus. Sceloporus poinsetti aureolus: Auth, Smith, Brown, and Lintz 2000:72.
    [Show full text]
  • L O U I S I a N A
    L O U I S I A N A SPARROWS L O U I S I A N A SPARROWS Written by Bill Fontenot and Richard DeMay Photography by Greg Lavaty and Richard DeMay Designed and Illustrated by Diane K. Baker What is a Sparrow? Generally, sparrows are characterized as New World sparrows belong to the bird small, gray or brown-streaked, conical-billed family Emberizidae. Here in North America, birds that live on or near the ground. The sparrows are divided into 13 genera, which also cryptic blend of gray, white, black, and brown includes the towhees (genus Pipilo), longspurs hues which comprise a typical sparrow’s color (genus Calcarius), juncos (genus Junco), and pattern is the result of tens of thousands of Lark Bunting (genus Calamospiza) – all of sparrow generations living in grassland and which are technically sparrows. Emberizidae is brushland habitats. The triangular or cone- a large family, containing well over 300 species shaped bills inherent to most all sparrow species are perfectly adapted for a life of granivory – of crushing and husking seeds. “Of Louisiana’s 33 recorded sparrows, Sparrows possess well-developed claws on their toes, the evolutionary result of so much time spent on the ground, scratching for seeds only seven species breed here...” through leaf litter and other duff. Additionally, worldwide, 50 of which occur in the United most species incorporate a substantial amount States on a regular basis, and 33 of which have of insect, spider, snail, and other invertebrate been recorded for Louisiana. food items into their diets, especially during Of Louisiana’s 33 recorded sparrows, Opposite page: Bachman Sparrow the spring and summer months.
    [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]
  • Literature Cited in Lizards Natural History Database
    Literature Cited in Lizards Natural History database Abdala, C. S., A. S. Quinteros, and R. E. Espinoza. 2008. Two new species of Liolaemus (Iguania: Liolaemidae) from the puna of northwestern Argentina. Herpetologica 64:458-471. Abdala, C. S., D. Baldo, R. A. Juárez, and R. E. Espinoza. 2016. The first parthenogenetic pleurodont Iguanian: a new all-female Liolaemus (Squamata: Liolaemidae) from western Argentina. Copeia 104:487-497. Abdala, C. S., J. C. Acosta, M. R. Cabrera, H. J. Villaviciencio, and J. Marinero. 2009. A new Andean Liolaemus of the L. montanus series (Squamata: Iguania: Liolaemidae) from western Argentina. South American Journal of Herpetology 4:91-102. Abdala, C. S., J. L. Acosta, J. C. Acosta, B. B. Alvarez, F. Arias, L. J. Avila, . S. M. Zalba. 2012. Categorización del estado de conservación de las lagartijas y anfisbenas de la República Argentina. Cuadernos de Herpetologia 26 (Suppl. 1):215-248. Abell, A. J. 1999. Male-female spacing patterns in the lizard, Sceloporus virgatus. Amphibia-Reptilia 20:185-194. Abts, M. L. 1987. Environment and variation in life history traits of the Chuckwalla, Sauromalus obesus. Ecological Monographs 57:215-232. Achaval, F., and A. Olmos. 2003. Anfibios y reptiles del Uruguay. Montevideo, Uruguay: Facultad de Ciencias. Achaval, F., and A. Olmos. 2007. Anfibio y reptiles del Uruguay, 3rd edn. Montevideo, Uruguay: Serie Fauna 1. Ackermann, T. 2006. Schreibers Glatkopfleguan Leiocephalus schreibersii. Munich, Germany: Natur und Tier. Ackley, J. W., P. J. Muelleman, R. E. Carter, R. W. Henderson, and R. Powell. 2009. A rapid assessment of herpetofaunal diversity in variously altered habitats on Dominica.
    [Show full text]
  • A WHITE-EYED SPOTTED TOWHEE OBSERVED in NORTHWESTERN NEBRASKA RICK WRIGHT, 128 Evans Road, Bloomfield, New Jersey 07003; [email protected]
    NOTES A WHITE-EYED SPOTTED TOWHEE OBSERVED IN NORTHWESTERN NEBRASKA RICK WRIGHT, 128 Evans Road, Bloomfield, New Jersey 07003; [email protected] Towhees visually—and in rare cases vocally—resembling the Eastern Towhee (Pipilo erythrophthalmus) have been reported at least eight times this century in the Nebraska Panhandle (Silcock and Jorgensen 2018), far to the west of that taxon’s expected range. As a result of the resplitting of the Eastern Towhee and Spotted Towhee (P. maculatus) (AOU 1995), observers have begun to once again pay close attention to the appearance and vocalizations of the region’s towhees, a practice that had declined following the species’ earlier taxonomic lumping (AOU 1954). On 20 and 21 May 2018, I observed a Spotted Towhee (presumptively P. m. arcticus, which breeds in the area) with white irides in the campground at the Gilbert- Baker Wildlife Area (42° 46.02' N, 103° 55.67' W) in the extreme northwest of the Nebraska Panhandle, 10 km north of Harrison, Sioux County. I photographed the bird on the first date (Figure 1). The deep saturated black of the head indicated that this individual was a male; the browner primaries were presumably retained juvenile feathers, contrasting with the rest of the formative plumage, identifying this as an individual in its second calendar year. When I returned on the second date, the towhee was accompanied by a female Spotted Towhee of unknown age; her plumage and soft-part colors were unremarkable. Silent the day before, on this occasion the male sang several times, a series of loud ticking notes followed by a lower-pitched, buzzy trill indistinguishable to my ear from the vocalizations of other nearby Spotted Towhees.
    [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]
  • Wildland Fire in Ecosystems: Effects of Fire on Fauna
    United States Department of Agriculture Wildland Fire in Forest Service Rocky Mountain Ecosystems Research Station General Technical Report RMRS-GTR-42- volume 1 Effects of Fire on Fauna January 2000 Abstract _____________________________________ Smith, Jane Kapler, ed. 2000. Wildland fire in ecosystems: effects of fire on fauna. Gen. Tech. Rep. RMRS-GTR-42-vol. 1. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 83 p. Fires affect animals mainly through effects on their habitat. Fires often cause short-term increases in wildlife foods that contribute to increases in populations of some animals. These increases are moderated by the animals’ ability to thrive in the altered, often simplified, structure of the postfire environment. The extent of fire effects on animal communities generally depends on the extent of change in habitat structure and species composition caused by fire. Stand-replacement fires usually cause greater changes in the faunal communities of forests than in those of grasslands. Within forests, stand- replacement fires usually alter the animal community more dramatically than understory fires. Animal species are adapted to survive the pattern of fire frequency, season, size, severity, and uniformity that characterized their habitat in presettlement times. When fire frequency increases or decreases substantially or fire severity changes from presettlement patterns, habitat for many animal species declines. Keywords: fire effects, fire management, fire regime, habitat, succession, wildlife The volumes in “The Rainbow Series” will be published during the year 2000. To order, check the box or boxes below, fill in the address form, and send to the mailing address listed below.
    [Show full text]