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Piru, Potholes, and Temescal Grazing Allotments - Botany Letter to the File

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Piru, Potholes, and Temescal Grazing Allotments - Botany Letter to the File United States Forest Los Padres National Forest 6755 Hollister Ave., Department of Service Suite 150 Agriculture Goleta, CA 93117 805-968-6640 805-068-6790 TTY 805-961-5729 FAX File Code: 2670 Date: 611812010 Subject: Piru, Potholes, and Temescal Grazing Allotments - Botany Letter to the File To: John Bridgwater, Ojai District Ranger From: Lloyd Simpson Los Padres Forest Botan~ I have examined the recent changes in the allotment boundary of the western section of the Rodeo Flat Unit of the Temescal Allotment and the proposed road and trail maintenance proposals for all the allotments. As part of that examination, Irvin Fox-Fernandez and I surveyed the area of the boundary change and several of the roads on March 23,2010. No occurrences of sensitive plant species were detected in the suitable range of the boundary extension for the Rodeo Flat Unit. This is a relatively small area of 56 acres of secondary suitable range and 5 acres of primary suitable range. This extension will have no effect on the Sensitive Plant species discussed in the plant Biological Evaluations. During our surveys of the roads on March 23, 2010 and October 11,2007, we examined likely habitat along the roads and found no occurrences of Sensitive Plants species. Since maintenance will occur on the existing road bed or trail footprint only, it is not likely that there will be any direct effect on sensitive plants. Since there were no sensitive plants found in the areas adjacent to the roads and trails, it is unlikely that any indirect effects will occur either. There will be no cumulative effects since no sensitive plants occur in the project area. Therefore, there will be no effect on sensitive plants caused by road and trail maintenance activities. A e Caring for the Land and Serving People Printed on Recycled Paper ••• , LOS PADRES NATIONAL FOREST OJAT RANGER DISTRICT BIOLOGICAL EVALUATION FOR THREATENED, ENDANGERED, PROPOSED, AND SENSITIVE PLANT SPECIES PIRU, POTHOLES, & TEMESCAL GRAZING ALLOTMENTS Revised /_______________ By: Date: /14 fr 7, ZOOZ Llord Sihipson i FOREST BOTANIST Reviewed By: j,ate: ,,Jhn4hLBridgwater 7 (1OJAI / DISTRICT RANGER I. INTRODUCTION This biological evaluation (BE) analyzes the potential effects of authorizing grazing on the Lower Pint Allotments on the Threatened, Endangered, Proposed, and Sensitive plant species currently listed by the Regional Forester for the Los Padres National Forest (Los Padres National Forest, October 2006). Fieldwork was conducted by Richard A. Burgess and Patricia Munro in 1999 and 2000. Only those species that are known to occur or have the potential to occur on the Ojal Ranger District are considered in detail. The names and current status of these species are shown in Table 1. The purpose of this BE is to review the Piru, Potholes, and Temescal Grazing Allotments in sufficient detail to determine if the proposed action may result in adverse impacts to the species listed in Table 1. The sensitive plant species considered in detail in this document are: Calochortus weedii var. vestus and Fritillaria ojaiensis. There are no threatened, endangered, or proposed plant species in the project area. Within the project area there is no critical habitat or areas proposed as critical habitat for listed plant species. Vegetation within the allotments can be characterized as arid coastal sage scrub, interspersed with annual grassland, and pockets of riparian woodland consisting mainly of California sycamore (Platanus racemosa), coast live oak (Quercus agrfolia), and occasional big-leaf maples (Acer macrophyllum). Slopes with thin soils support dense chaparral, dominated by chamise (Adenostomafasciculatum). The elevation of the project area varies from about 1200 feet in the bottom of Canton, Reasoner, and Dominguez Canyons to nearly 3,000 feet at the upper end of the Potholes Trail. Pint, Potholes, & Temescal Allotments - 1 - Biological Evaluation, Plants 5/9/2007 Lloyd Simpson Table 1. Sensitive Plants of the Ojai Ranger District and their Status Common Name Scientific Name Status* Abrams’ flowery puncturebract Acanthoscyphusparishii var. abramsii Sensitive Mount Pinos onion Allium howellii var. clokeyi Sensitive Palmer’s mariposa lily Calochortus palmeri var. palmeri Sensitive late-flowering mariposa lily Calochortus weedii var. vestus Sensitive San Fernando Valley spineflower Chorizanthe parryi var. fernandina Sensitive umbrella larkspur Delphinium umbraculorum Sensitive Ojai fritillary Fritillaria ojaiensis Sensitive Abrams’ alumroot Heuchera abramsii Sensitive urn-flowered alumroot Heuchera elegans Sensitive San Gabriel Mountains sumfiower Hulsea vestita ssp. gabrielensis Sensitive California satintail Imperata brev(folia Sensitive pale-yellow layia Layia heterotricha Sensitive Santa Barbara honeysuckle Lonicera subspicata var. subspicata Sensitive Chaparral beargrass Nolina cismontana Sensitive Sensitive Rock Creek broomrape - Orobanche valida ssp. valida chickweed starry puncturebract Sidotheca carphylloides Sensitive southern jewelfiower Streptanthus campestris Sensitive *Status: USD1 FWS, January 2006; USDA FS-R5 updated Sensitive Species List, October 1, 2006; Special Vascular Plants, Bryophytes, and Lichens List, July 2001. II. CURRENT MANAGEMENT DIRECTION Current policy as shown in the Forest Service Manual (FSM 2670.31) is to use the biological assessment process to review actions and programs authorized, funded, or carried out by the Forest Service to determine their potential for effect on Threatened and Endangered species and species proposed for listing. This biological evaluation provides the directed review of the proposed action’s potential effects on Threatened, Endangered, and Proposed plant species and has determined that the proposed action will not affect listed or proposed species (Table 2). Table 2. Potential for the sensitive and other special plant species known or suspected to occur on the Ojai Ranger District to be affected by the Piru, Potholes, and Temescal grazing Allotment projects. There are no Federally Threatened, Endangered, or Proposed species that occur in the project area based on known locations and potential habitat. Common Name Potential Comments on potential habitat Effect? Surveys for this species were negative. This plant is Abrams’ flowery No found at higher elevations and to the northwest of the puncturebract project area This species was not detected in earlier surveys. This plant is found at higher elevations and to the north of No Mount Pinos onion the projects area. It is also commonly found on soils not characteristic of the project area. Piru, Potholes, & Temescal Allotments -2- Biological Evaluation, Plants 5/9/2007 Lloyd Simpson Table 2. Potential for the sensitive and other special plant species known or suspected to occur on the Ojai Ranger District to be affected by the Piru, Potholes, and Temescal grazing Allotment projects. There are no Federally Threatened, Endangered, or Proposed species that occur in the prolect area based on known locations and potential habitat Common Name Potential Comments on potential habitat Effect? The project area is below the elevation range of this Palmer’s mariposa lily No species and there are no riparian habitats that are suitable for this species late-flowering mariposa lily Yes This San Fernando Valley species was not detected in earlier surveys. It is spmeflower. No not known to occur on the forest and is found to the south east of the project area. This species was not umbrella larkspur No detected in earlier surveys. It is know to occur well east of the project area. Ojai fritillary Yes This species was not detected in earlier surveys. It occurs in upper montane conifer forests in association Abrams’ alumroot No with Jeffrey pine which is not found in the project area. Its only known occurrence in the Rose Valley well north and west of the project area. This species was not detected in earlier surveys. It occurs at elevations higher than the project area in urn-flowered alumroot No montane conifer forests. The only known occurrence on the forest is in the Rose Valley northwest of the project area . This species was not detected in earlier surveys. It is San Gabnel Mountains . sunflower No found at higher elevations than the project area m Jeffrey pme upper montane comfer forests. This species was not detected in earlier surveys. It is found in association with hot-springs and calcareous California satintail No seeps which are not found in the project area. The closest known population is in Matilija Canyon well west of the project area. Surveys for this species were negative. Typical pale-yellow layia No habitat components for this species were lacking in the project area. This variety was not detected in earlier surveys. It is Santa Barbara honeysuckle No known from the Santa Ynez Mountains well west of the project area. This species was not detected in earlier surveys. It is Chaparral beargrass No only known from populations well west of the project area in the Santa Ynez Mountains. Surveys for this species were negative. This plant is Rock Creek broomrape No found at higher elevations and to the northwest of the project area. Piru, Potholes, & Temescal Allotments -3- Biological Evaluation, Plants 5/9/2007 Lloyd Simpson occur Table 2. Potential for the sensitive and other special plant species known or suspected to on the Ojai Ranger District to be affected by the Piru, Potholes, and Temescal grazing Allotment projects. There are no Federally Threatened, Endangered, or Proposed species that occur in the
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