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HomeMy WebLinkAbout3151; Palomar Airport Road Widening; Biological Resources Report of the Palomar Airport Road Widening and Associated Roadway Improvements Project; 1987-12-01•it BIOLOGICAL RESOURCES REPORT OF THE PALOMAR AIRPORT ROAD WIDENING m 'm PI li Prepared for aty of Carlsbad 2075 Las Pahnas Carlsbad. CA 92008 m m • WESTEC Services, Inc. 11 5510 Morehouse Drive Prepared by: TEC Services ) Morehouse I San Diego, CA 92121 August 1987 .316 f ** INTRODUCTION M m A biological survey of the proposed aUgnment fOT the widening of approximately 1.5 rmles of Palomar Airport Road was made to determine the flora, fauna, and habitat types found on the subject property. The foUowing report describes the general distribution and com- ponent plants of the vegetative associations and discusses wUdUfe habitat resources and their utiUzation. Particular attention during the survey was given to determining the presence or absence of significant biological features on or adjacent to the property. Significant biological features are considered to be: plant or animal species of rare and/or endangered stams; depleted or declining faunal species; and species and habitat types of unique OT limited distribution. The biological effects of the proposed road widening are addressed in this report, and recommendations to reduce identified cffeas are presented 'it •m m m ^ GEOGRAPHICAL LIMITS OF THE STUDY * The projea area is located east of Interstate 5, along Palomar Airport Road in the City of * Carlsbad, northwestem San Diego County. Califomia (Figure 1). The proposed align- ment includes 1.5 mUes from east of Paseo del Norte to approximately 0.5 mile east of Laurel Tree Road (Figure 2), Canyon de las Encinas Ues duectiy south of Palomar Airport ^ Road, and Palomar Airport Ues to the ncjrtheasL LAND USE I* Palomar Airport Road is currentiy a 2-lane highway. Lands directiy soutii of the existing *" road and in the northeastem portion of the aUgnment have historicaUy been used for agri- cultural purposes. Only land in the northwestem part of the aUgnment is currentiy under «• cultivation. Several utiUty easements occur on or just offsite. Additional offsite land uses m include agricultural activities to the north, and commercial developments to the east and _ west. ii m m TOPOGRAPHY AND SOILS The existing Palomar Airport Road is an east-west-oriented artery along the northem edge of the floodplain of Canyon de las Encinas. The road abuts gentiy sloping hills to the north, while land to the south in the floodplain is relatively flat. Elevation within the project area ranges from a high of approximately 140 feet above mean sea level (MSL) in SAN' ONOFRE FALLBROOK 1 WARNER kSPRINGS , Lake iHtnihaui ''A OCEANSIOfe VISTA •ft PROJECT LOCATION I ) ^ Wohlford ESCONDIDO LEUCADIM Lakl^ HodtuS JULIAN RAMONA O > •z. DEL MAF •pOWAV X Lake LAJOLU SANTEE) Lovland Rttamoir TMEGK) POINl LOMM .JAMUL ^NAT^AL <5p|~r Barren Uke ^"TMYCHULAVIST/ .DULZURA IMPERIAL'S BEACH] 'oiay Ukt . ^m"^ m Regional Location of Project FIGURE 1^ W WESTEC S«rvte«t, Inc. die northeast to 60 feet above MSL in tiie soutii. An intermittent stream mns tiirough tiie canyon south of die projea site, although this stteam is diverted underground at one point. SoUs onsite are primarily of die Las Flores (LeE2), Diablo (DaD). Marina (MIC), Salinas (ScA). Tujunga (TuB), and Visalia (VaB) series. The first three types are found in upland areas within the aUgnment. Las Horcs soUs are moderately weU-drained, loamy, fine sands with a sandy clay subsoU which formed in material weathered from siUceous marine sandstone. Diablo soUs are weU-drained. deep clays derived from soft, calcareous sand- stone and shale. Marina soils, which are found on old beach ridges, are excessively drained, very deep, loamy, coarse sands derived from weakly consolidated to noncoherent eoUan sand. Salinas. Tujunga, and VisaUa soUs are well-drained clay OT sandy loams which occur on aUuvial fans and floodplains (USDA 1973). These soUs occur in low-lying areas of die site, principaUy south of the existing road. SURVEY METHODS The site was surveyed on June 10, 1987 by Patricia Gordon-Reedy, Associate Biologist with WESTEC Services, between the hours of 0900-1400. Weather conditions at the time of survey consisted of overcast skies, a temperature range of approximately 68° to 73°F, and a breeze of 0-5 mph. The alignment was surveyed on foot AU areas of the aUgnment were visible from the survey route, and aU habitat types were visite(i AU observed plants were identified, and species Usts were compUed. Animals were identified by scat, tracks, burrows, v(x;aUzations, OT direa observations with the aid of binoculars. Vegetation was mapped on 1" = 40* topographical maps of the aUgnment. No quantitative plant transects or animal trapping smdies were conducted as part of this smdy. Scientific nomenclature used throughout this report conforms to Munz (1974) for plants. A.O.U. (1986) fOT birds, Jennings (1983) for reptiles and amphibians, and Jones et al. (1982) fOT mammals. Additional sources of information included previous surveys conducted in the vicinity, as weU as local and regional authorities. These sources arc cited where appropriate in the report. VEGETATION Vegetative habitats arc deUneated in Figures 4 dirough 7 and discussed separately below. Figure 3 provides an index to Figures 4 tiuough 7. Vegetative associations foUow HoUand (1986) where appUcable, OT Thome (1976). A floral species Ust is included as Attach- ment A of this report. The survey period was adequate to detea many annuals and ^ herbaceous perennials. Three vegetative associations were deteaed onsite: disturbed OT successional coastal sage scmb; disturbed habitat; and wetiand habitat. Disturbed habitat accounts fOT most of the ^ vegetation within the grading area. •nn Successional coastal sage scmb occurs on roadcuts and upper slopes in the northeastem portion of the site. OveraU, this asscxdation comprises 1.52 acres OT 6.3 percent of the total vegetation within the grading area. This area is relatively (tisturbed, as evidenced by soU displacement resulting firom previous road constraction, as weU as the preponderance of successional native species OT non-native, weedy species. Dominant species include Califomia sagebmsh {Artemisia californica), flat-top buckwheat {Eriogonumfasciculatum ssp. fasciculatum), and coyote bmsh {Baccharis pilularis var. consanguinea). Other species present, but in lesser amounts, include lemonadeberry {Rhus integrifolia), desert elderberry {Sambucus mexicana), and coastal prickly-pear {Opuntia littoralis). The understory of this association is poOTly developed, and consists of such species as red brome {Bromus rubens), telegraph weed {Heterotheca grandiflora), sand-aster {Corethrogyne filaginifolia var, virgata), and black mustard {Brassica nigra). Disturbed vegetation is comprised of non-native, exotic, OT weedy species. This habitat dominates the majority of the site, and is a result of past or present agricultural or grazing activities, roadway constmction, and utiUties placement and maintenance. Typical species include myoporam {Myoporum laetum), ttee tobacco {Nicotiana glauca), sweet fennel {Foeniculum vulgare), castor bean {Ricinis communis), garland chrysanthemum {Chrysanthemum coronarium), halberd-leaf saltbush {Atriplexpatula ssp. hastata), fountain grass {Pennisetum setaceum), ice plant {Gasoul crystallinum), and Russian-thistie {Salsola iberica), among others. Disturbed vegetation comprises 20.7 acres (86.2 percent) of the vegetation onsite. SmaU agricultural areas occur in the northeastern portion of the aUgnment, and account for an additional 0.96 acre (4.0 percent) which is effectively classified as disturbed habitat from a Inological perspective. u 3 O n O) 3 O 3 X a a a £ * NOTE LEGEND DISTURBED COASTAL SAGE SCRUB RIPARIAN WOODLAND RIPARIAN SCRUB MESIC VEGETATION EXOTIC TREES MULEFAT (Baccharis glulinosa) COAST LIVE OAK WETLAND HABITAT IMPACTED BY PROJECT (Permanent) WETLAND HABITAT IMPACTED BY PROJECT (Short-Term) : Areas undelineated denote disturbed vegetation or agriculture. L Vegetative Habitats as Shown Along Project Site WESTEC Services, Inc FIGURE a r n r r r r I r i r L i: LEGEND DISTURBED COASTAL SAGE SCRUB RIPARIAN WOODLAND RIPARIAN SCRUB MESIC VEGETATION EXOTIC TREES MULEFAT {Baccharis glutinosa) COAST LIVE OAK WETLAND HABITAT IMPACTED BY PROJECT (Permanent) WETLAND HABITAT IMPACTED BY PROJECT (Short-Term) NOTE; Areas undelineated denote disturbed vegetation or agriculture. r [: L ia f Vegetative Habitats as Shown Along Project Site FIGURE s WESTEC Services. Inc. n • '53 * ZZ NOTE LEGEND DISTURBED COASTAL SAGE SCRUB RIPARIAN WOODLAND RIPARIAN SCRUB MESIC VEGETATION EXOTIC TREES MULEFAT (Baccharis glutinosa) COAST LIVE OAK WETLAND HABITAT IMPACTED BY PROJECT (Permanent) WETLAND HABITAT IMPACTED BY PROJECT (Short-Term) : Areas undelineated denote disturbed vegetation or agriculUJre. r-l ^^^^-^— r-^ 1 .-^ I + k i. 4 8 Vegetative Habitats as Sliown Along Project Site FIGURE 6 WESTEC Services. Inc. —• :'• •- 23 m * 7L NOTE LEGEND DISTURBED COASTAL SAGE SCRUB RIPARIAN WOODLAND RIPARIAN SCRUB MESIC VEGETATION EXOTIC TREES MULEFAT (Baccharis glutinosa) COAST LIVE OAK WETLAND HABITAT IMPACTED BY PROJECT (PerTTianent) WETLAND HABITAT IMPACTED BY PROJECT (Short-Term) : Areas undelineated denote disturbed vegetation or agriculfijre. 100 FEET Vegetative Habitats as Shown Along Project Site FIGURE 7 10 WESTEC Services. Inc. Riparian habitat occurs in scattered locations throughout the aUgnment. and is generaUy a direct result of aclditional water fix>m storm drains OT pipes. This habitat is better-developed offsite to the south, in the intermittent drainage that transects C^yon de las Encinas. Most of the riparian habitat onsite is classified as riparian scmb. In most areas, this association is dOTiainated by m^c{dLt(Bdccharis glutinosa) or a combination of mulefat and coyote brash. Young wiUows {Salix spp.) occur only occasionaUy in mulefat-dominated scmb. Riparian scmb comprises 0.51 aCTe (2.1 percent) of vegetation within the aUgnment Better-developed wetland habitat, which is dominated by anoyo wiUow {Salix lasiolepis), cat-taU {Typha sp.), and buhiish {Scirpus sp.), occurs onsite only near the tmck farm, in the westem portion of the aUgnment This habitat amounts to 0.13 acre (0.54 percent of the total vegetation) onsite. SmaU areas of mesic habitat dominated by herbaceous, facultative wetiand species occur south of Palomar Airport Road, at the toe of the existmg slopes. Sedge {Cyperus sp.) is the primary species in these areas. This association comprises 0.003 acre (0.01 percent) of the total vegetation onsite. Although no oaks OT oak wcKxUand cx;cur within the grading area, two incUvidual coast live oak trees {Quercus agrifoiia) are located approximately 15-25 feet south of the grading limit Southem oak wcxxlland is relatively weU-developed offsite to the southeast. WILDLIFE Wildlife Habitat Evaluation OveraU, wUdlife diversity on the subject property is not expected to be high due to past disturbances, the traffic on Palomar Airport Road, and adjacent land uses. Most of the site also lacks dense cover, trees, and rock outcroppings which contribute to habitat diversity and hence wUdlife diversity. The site is somewhat enhanced by the presence of riparian and oak woo(Uands to the south. FOT the most pan. however. wUdlife use of the site is expected to be limited to common scmb-ass(xnated species and species adapted to disturbed environments. 11 Amphibians No amphibiansjwm detect^ onsite, and few are expected to occur here. The lack of a permanent water source and £q)propriate habitat are limiting factors. Reptiles No reptile species were detected onsite. although a few are expected to occur here, includ- ing Califonua side-blotched Uzard {Uta stansburiana elegans), westem fence lizard {Sceloporus occidentalis), orange-throated whiptail {Cnemidophorus hyperythrus beldingi), sUvery legless lizard {Aniella pulchra pulchra), San Diego homed lizard {Phrynosoma coronatum blainvillei), and common kingsnake {Lampropeltis getulus). Birds Twelve bird species were detected onsite. Some of these, such as mouming dove {Zenaida macroura), lesser goldfinch {Carduelis psaltria), house finch {Carpodacus mexicanus), and northem mockingbud {Mimus polyglottos), are often associated with disturbed habitats, and this appears to be the case onsite. Westem kingbttd {Tyrranus verticalis) and westem meadowlark {Sturnella neglecta) were also observed in disturbed or grassy areas. Anna's hummingbird {Archilochus anna), brown towhee {Pipilo fuscus), common flicker {Colaptes auratus), and song sparrow {Zonotrichia melodia) were observed primarily in scrdb habitat A red-shouldered hawk {Buteo lineatus) was observed flying over the site, and probably forages here, but nests offsite to the south. FinaUy. a common yeUowthroat {Geothlypis trichas) was observed in riparian habitat onsite. Most of the observed birds can be expected to nest onsite OT nearby, with the exception of the hawk, which would not find nesting habitat here. Mammals Three mammal species were deteaed within the aUgnment: bmsh rabbit {Sylvilagus bachmani cinerascens), CaUfomia ground squirrel {Spermophilus beecheyi nudipes), and raccoon {Procyon lotor). The abundance of Califomia ground squinel, in particular, attests to the disturbed conditions found onsite. The lack of coyer, disturbed conditions, and proximity to development probably limits the (x;currence of several larger mammal species, although diese animals may utilize woodland habitats to the south as a corridOT. 12 HIGH INTEREST SPECIES/HABITATS Plants High-interest plants include those Usted by the U.S. Fish and WUdlife Service (USFWS 1985a), Califomia Department of Fish and Game (CDFG 1985). and CMfomia Native Plant Society (Smith and Yoi^ 1984). The CNPS Usting is sanctioned by the CaUfomia Department of Fish and Game and essentially serves as their Ust of "cancUdate" species. No sensitive plant species were detected onsite. PotentiaUy-occurring species are briefly discussed below. Several sensitive plants are known from the projea area. The great majority of these are associated with habitats OT vegetative asscxnations which do nOT occur on^te. and are not to be expected on the (Usturbed soUs which comprise the majority of the study area. In any case, most of these species would have been detectable during the survey period. Five of the sensitive species considered potentiaUy cxxuning are shmbs which are easUy detectable duoughout the year. This list includes Encirutas baccharis {Baccharis vanessae), Califomia adolphia {Adolphia californica), wart-stemmed ceanothus {Ceanothus verrucosus), sea dahlia {Coreopsis maritima), and Orcutt's hazardia {Hazardia orcuttii), San Dieguito sand- aster {Corethrogyne filaginifolia var. linifolia) is an herbaceous percnrual which would have been present and observable during the survey peri(xL Although the closely-related species Corethrogyne filaginifolia var. virgata occurs onsite, San Dieguito sand-aster was not detected. FinaUy, three annual species were COTisidered potentiaUy present onsite. All of these would also have been present and detectable during the survey period. Non- detection incUcates that they do not occur onsite. at least in any significant numbers. This group includes Orcutt's spineflower {Chorizanthe orcuttiana). Palmer's grappling hook {Harpagonella palmeri), and NuttaU's loms {Lotus nuttallianus). Orcutt's spineflower, whUe past flowering, would have been detectable to generic level during the survey period. Palmer's grappling hook is an inconspicuous annual which would also have been past flowering. The level of habitat disturbance is probably the limiting factor for this species onsite. NuttaU's loms occurs on sandy beaches, and is therefore limited from occurrence onsite by lack of suitable habitat 13 Animals High interest animal species are officiaUy Usted by the U.S. Fish and Wildlife Service (USFWS 1985b) and die CWomia Department of Fish and Game (CDFG 1980)._ No sensitive animal species were deteaed onsite. No sensitive amphibian species are expeaed to utilize tills site. PotentiaUy-occurring reptile, bird, and mammal species are (Uscussed below. A number of declining reptUe species are known from the County. These species are con- sidered sensitive due to their restricted distribution, which is being compoimded by on- going habitat loss as a result of urbanization of the coastal plain region. In adtUtion, the populational stams of many of these species is pOOTly known. Orange-throated whiptaU {Cnemidophorus hyperythrus beldingi) is a candidate fOT federal listing (Category 2). protected by the CaUfomia Department of Fish and Game, and considered threatened by the San Diego Herpetological Society (SDHS 1980). The princi- pal threat to this species is loss of habitat It is stiU l(x;aUy commrai in many areas where it does occur. This species could also be expected in scmb habitat onsite. San Diego homed lizard {Phrynosoma coronatum blainvillei) is a candidate fOT federal Ust- ing (Category 2). protected by the Califomia Department of Fish and Game, and con- sidered endangered by the San Diego Herpetological Society (SDHS 1980) due to habitat destmction and coUecting for die pet trade. It is sliU relatively widespread and common in San Diego County. This species could also be expected throughout low scmb habitat onsite. SUvery legless Uzard {Aniella pulchra pulchra) is considered threatened by the San Diego Herpetological Society (SDHS 1980). This secretive species appears to occur in highly localized populations near drainages, and would be most likely onsite in areas of sandy soU. Coastal rosy boa {Uchanura trivirgata roseofusca) is proteaed by the CJalifomia Department of Fish and Game (1980 as amended). This species is widespread throughout the County in dry, rocky chaparral and desert habitats, usually near drainages with intermittent streams. Coastal rosy boa is declining due to habitat alteration. Although this species is 14 more likely to occur south of the site in relatively namral habitat. in(Uviduals could occa- sionally occur here. Birds Least BeU's vireo {Vireo bellii pusillus) is an obUgate riparian habitat bird species which prefers habitat with a dense understory under 3 m in height (Goldwasser 1981). This means that it requires riparian woo<Uand vegetation in which to carry out its life cycle. Vireos arrive in San Diego County m late March to early April and leave fOT their Mexican wintering grounds in September. AU reproductive activities, from pair formation to fledg- ing of young, occur in weU-defined territories; usuaUy wiUow-dominated riparian vegeta- tion with a dense understory. The species appears to be highly site tenacious, with males often returning to the same general area used the previous year (Salata 1983). The very smaU amount of riparian habitat onsite is not "prime" habitat, but is stmcturaUy adequate fOT nesting by least BeU's vireo. This habitat could probably support a maximum of one pair. The probabiUty of this species utiUzing riparian habitat onsite is very smaU, however, due to the smaU areal extent of this habitat, its isolated stams. the traffic on Palomar Airport Road, and the disturbed nature of the sunounding area. In adcUtion to least BeU's vireo, several other breeding bird species of concem are associated specificaUy with riparian woodland habitat These sensitive bud species include wiUow flycatcher {Empidonax traillii), yeUow warbler {Dendroica petechia), and yellow- breasted chat {Icteria virens). Brown-headed cowbird {Molothrus ater) parasitism in com- bination with habitat loss are suspected as the major reasons for the decline of these species. None of these species was deteaed onsite, although a smaU amount of marginally suitable habitat is present in one location, A locaUy decUning upland bird species is the black-taUed gnatcatcher {Polioptila melanura californica) (Everett 1979; Remsen 1978). This species is associated with coastal sage scmb habitat (Atwood 1980). It was not observed onsite and is nol expected due to the limited extent of die onsite scmb habitat and its disturbed charaaer. Birds of prey, as a group, arc considered sensitive due to the overaU loss of foraging and nesting habitats. One species, red-shouldered hawk, was observed flying over the site: This species may utiUze the site For foraging to some degree, but does not nest on the site. 15 Mammals The only high-interest mammal species which might utilize the site is b^at {Felis rw/ky). ^Sebobcat becime a species of concem a few years ago when trapping pressures increased sharply in response to the fur trade. TMsjpccies appears relatively cominoain bmshland habitat in San Diego Clounty (Lcnd)cck 1978) and is (^nsidetcd a pptential inhatnmt of the study area, although it is more likely to occur in habitat south of the site. Habitats Sensitive habitats are those which arc considered rare within the region, support sensitive plants OT animals, OT have high productivity or wUdlife value. The Conservation Element of tiie (jencral Plan fOT die County of San Diego (Ctounty of San Diego 1980) Usts many of these habitats. Wetiand habitat is considered a sensitive resource by die Califomia Department of Fish and Game. This habitat is specificaUy addressed by Fish and Game Code Sections 1600-1606 (Streambed Alteration Agreement), and wetlands are also covered under the jurisdiction of the U.S. Army Corps of Engineers permit process (Reinen 1978). Wetiands are subject to Clean Water Act permit provisions regulating dredge and fiU operations. These provisions are enforced by the U.S. Army Corps of Engineers, with technical input from the U.S. Environmental Protection Agency and the U.S. Fish and midlife Service. Wetland habitat onsite consists of two (Usjunct areas of riparian wcxxUand which total 0.13 acre, six (Jisjunct areas of riparian scrab wWch totil 0.51 acre, and mesic vegetation comprised of wetiand asscxnated herbaceous species (0.003 acre). The total wetiand vegetation onsite amounts to 0.64 acre. The small size of this wetiand and its stmctiual makeup do not COT^is^TvaluaBle \wl(llife habitat in a regional context Nevertheless, the project may require a 404 permit from the Corps of Engineers. DISCUSSION AND IMPACT ANALYSIS The proposed road widening project wiU result in grading of approximately 24.2 acres of habitat on both sides of Palomar Airport Road. The overaU impact to biological resources from this projea is not expected to be significant, given the disturbed nature of the site. 16 Approximate habitat losses are shown below: Impacts within grading area: Habitat A<?rgagg Imp^gd •Dismrbed 21.7 Disturbed coastal sage scrab 1-52 Riparian woodland 0.13 Riparian scmb 0-51 Mesic vegetation 0.003 Exotic ttees 0-20 •Includes agriculttore (0.74 acre), but excludes existing Palomar Auport Road. Projea implementation wUl result in an incremental lossof haWtat fOT potentiaUy-occuning reptUe species and foraging habitat for raptor species (including red-shouldered hawk^. These losses are considered a cumulative impact which is not a significant effect of this projea alone. Of concem, however, is the presence of sensitive wetiand habitat which occurs onsite. This project wiU result in die permanent loss of approximately 0.64 acre of wetiand habitat due to road widening. A short-term impact during consttniction of up to an additional 0.24 acre (0,03 acre of riparian woodland and 0.21 acre of riparian scmb) wiU occur from constraction activities immecUately adjacent to the proposed aUgnment. These temporarily disturbed areas wiU probably revegetate naturaUj^. In^additioiu haWtat outside diis immediately adjacent area could also be significantiy affected if consttuction practices are not confined to the immediate aUgnment area. This project as designed wiU not have any significant impacts to biological resources, and no mitigation measures wiU be requued under the CMifomia Environmental QuaUty Act. Because impacts to wetiand vegetation total less than 1 acre, this project meets the requirements for a Nationwide Permit under die U. S. Army Corps of Engineers Clean Water Act Section 404 permit process. No appUcation to the Corps of Engineers would, thwefOTe, be required The project is located in die coastal zone, however, and may require a Coastal Development Permit from the CJalifomia Coastal Commission. 17 RECOMMENDATIONS Impacts to wetiand vegetation outside the grading area would be reduced by adherence to certain constmction practices, as outiined below. The greatest loss of habitat is expected from the use of heavy equipment in wetiand areas, on and offsite, and nonsensitive constmction practices would result in additional impacts to wetiand vegetation which could bring the total wetiand impact acreage to over 1 acre. Construction Practices 1. Heavy equipment and constmction activities would be restricted to the grading area to the greatest degree possible in order to reduce direct impacts to wetiand habitat. Prohibited activities in the wetiand labitat include staging areas, equipment access, and disposal or temporary placement of excess fiU, Constraction limits and wetiand habitat would be fiagged by a qualified biologist. Constraction activities would be monitored by an onsite inspectOT to ensure grading activities do not affect additional acreage. Any unauthorized impacts caused by constraction operations would require that the contractor replace aU habitat to its original condition. 2. FiU slopes should be constracted from the top of the existing road or t>erm, downward. Grading should also occur from the existing road or berm outward. 3. Move headwaU sttuctures further in toward the road; reduce riprap. 4. Retain existing pipes in areas where wetland vegetation occurs in order to avoid adcUtional wetiand habitat removal. It is acknowledged that new pipes wUl need to be placed, 5. Fueling of equipment should not occur in any portion of the site near the intemiittent stream in Onyon de las Encinas. Habitat Replacement Although the loss of coastal sage scmb onsite is not considered a significant effect of this project, it is recommended that slopes be revegetated with native scmb species found in the 18 area. Suitable species include Califomia sagebrash {Artemisia californica), flat-top buckwheat {Eriogonum fasciculatum ssp. fasciculatum), IcmonadGbcrry {Rhus integrifolia), and deerweed {Lotus scoparius), among others. This area could be effectively hydroseede(L Other Recommendations Two coast Uve oak trees occur approximately 20 feet outside the grading line (Figure 7) in the northeastem portion of the aUgnment. These oaks should be staked and flagged by qualified personnel prior to the onset of constraction. All constmction activities should be prohibited within 10 feet of the dripline of these trees. This includes equipment as weU as earth-moving activities. 19 REFERENCES CITED American Ornithologists' Union, Committee on Classification and Nomenclature, 1986. Thirty-fourth Supplement to the A.O.U. CheckUst of North American Buds. The Auk 99(3). im Atwood. J. 1980. The United States distribution of the Califomia black-taUed gnatcatcher. Westem Birds 11:65-78. Califomia Department of Fish and Game. 1985. Designated endangered or rare plants. ** The Resources Agency. June 19. "* County of San Diego. 1980. Conservation Element (Part X) of the County general plan, «* Planning Department GPA-80-61. Everett, W,T. 1979. Threatened, declining, and sensitive bird species in San Diego ^ Coimty. San Diego Audubon Society, Sketches. June. m, Goldwasser, S. 1981. Habitat requirements of the least BeU's vu-eo. Califomia Departmeni of Fish and Game. Sacramento. UnpubUshed report. mm HoUand, R.F. 1986. Preliminary descriptions of the terrestrial natural communities of California. State of California. The Resources Agency. aw Jennings. M.R. 1983, An aimolaled checkUst of the amphibians and reptUes of Califomia. — CaUfomia Fish and Game 69(3):151-171. * Jones. J.K.. Jr.. D.C. Carter, H.H. Genoways. R.S. Hofftnan. and D.W. Rice. 1982, ^ Revised checkUst of North American mammals north of Mexico. Occasional Papers of die Museum Texas Tech. Umversity 80:1-22. wm Lembeck. M 1978. Bobcat study, San Diego County. (California Department of Fish and Game, Nongame WUdlife fiivestigations. Study IV. Job 1.7. HH Munz. P.A. 1974, A flora of southern Califomia. University of Califomia Press, — Berkeley. Reinen, R.H. 1978. Notice of exercise of Section 404 jurisdiction over certain stteams ^ and wetiands in California. Los Angeles District Corps of Engineers, July 15. tm Remsen, V. 1978. The species of special concem Ust: an armotated Ust of declining or vulnerable birds in Califomia. Westem Field Omithologist Museum of Vertebrate — Zoology, Uiuversity of C^alifomia, Berkeley. Salata, L.R. 1983. Stams of the least BeU's vireo on Camp Pendleton, (i^alifomia: Report _ on research done in 1983. UnpubUshed Report, U,S. Fish and Wildlife Service, Laguna Niguel, CJalifomia. San Diego Herpetological Stxnety. 1980. Survey and stams of endangered and threatened species of reptiles natively occurring in San Diego County. Prepared for Fish and ^ WUdlife Committee, San Diego Department of Agriculture, 33 pp. 20 Smitii, J.P.. Jr. and R. York. 1984. Inventory of rare and endangered vascular plants of CaUfomia. (California Native Plant Society. Special PubUcation No. 1 (3rd Edition), Thome, R.F. 1976. The vascular plant communities of Califomia. In Symposium proceedings-Plant communities of southem Califomia. June Latting (editor). Califomia Native Plant Society, Special PubUcation No. 2. United States Department of Agriculture (USDA). 1973. SoU Survey. San Diego area, Califomia. 21 ATTACHMENT A FLORAL SPECIES LIST FamUy Scientific Name Dicotyledoneae Aizoaceae - Carpet-Weed FamUy Carpobrotus aequilateralus Gasoul crystalUnum Gasoul nodiflorum Anacardiaceae - Sumac Family Rhus integrifoUa Apiaceae (UmbelUferae) - Carrot FamUy Foeniculum vulgare Asteraceae (Compositae) - Sunflower FamUy Ambrosia confertiflora Anthemis cotula Artemisia caUfornica Baccharis glutinosa Baccharis pilularis ssp. consanguinea Cttlycadenia tenella Centaurea meUtensis Chrysanthemum coronarium Cirsium sp. Conyza canadensis Corethrogyne fUaginifoUa var. virgata Cotula coronopifoUa Attachment A FLORAL SPECIES LIST Common Name Sea-Fig Ice-Plant Little Ice-Plant Lemonadeberry Sweet Fennel Mayweed CaUfornia Sagebrush Mule Fat Coyote Brush Rosin Weed Tocalote Annual Chrysanthemum Thistle Horseweed Sand-Aster Brass-Buttons twm Cynara cardunculus Gnaphalium bicolor GnaphaUum caUfornicum Haplopappus squarrosus ssp. grmdeUoides Haplopappus yenetus ssp. vernonioides Hemizonia fasciculata Heterotheca grandiflora Lactuca serriola Pieris echioides SUybum marianum Sonchus oleraceus Stephanomeria exigua Xanthium strumarium var. canadense Borginaceae - Borage FamUy HeUotropium curassavicum var. oculatum Brassicaceae (Cruciferae) - Mustard FamUy Brassica nigra Raphanus sativus Sisymbrium altissimum Cactaceae - Cactus FamUy Opuntia UttoraUs Capparaceae - Caper Family Isomeris arborea var. arborea Cardoon Cudweed CaUfornia Everlasting Hazardia Coastal Isocoma Tarweed Telegraph Weed Prickly Lettuce Bristly Ox Tongue MUk Thistle Sow Thistle Small Wreath-Plant Cocklebur Chinese Pusley Black Mustard WUd Radish Tumble Mustard Coastal Prickly Pear Bladderpod CaprifoUaceae - Honeysuckle Family Sambucus mexicana CaryophyUaceae - Pink FamUy Spergularia sp. Chenopodiaceae - Goosefoot Family Atriplex patula ssp. hastata Atriplex semibaccata Chenopodium califomicum Salsola iberica Convolvulaceae - Morning-Glory FamUy Calystegia macrostegia Euphorbiaceae - Spurge Family Eremocarpus setigerus Ricinus communis Fabaceae (Leguminosae) - Pea FamUy Lotus scoparius ssp. scoparius Medicago polymorpha MeUlotus albus Geraniaceae - Geranium FamUy Erodium cicutarium Malvaceae - Mallow FamUy Malacothamnus fasciculatus var. fasciculatus Malva parviflora Elderberry Sand Spurrey Halberd-Leaf Saltbush AustraUan Saltbush CaUfornia Pigweed Russian-Thistle Morning Glory Turkey Mullein, Dove Weed Castor Bean Deerweed Bur-Clover White Sweet-Clover Red-Stem Filaree Bush Mallow Cheeseweed mi Myoporaceae - Myoporum FamUy Myoporum laetum Papaveraceae - Poppy Family Eschscholzia caUfornica Plantaginaceae - Plaintain Family Plantago lanceolata Polygonaceae - Buckwheat FamUy Eriogonum elongatum Eriogonum fasciculatum ssp. fasciculatum Polygonum sp. Rumex crispus Primulaceae - Primrose FamUy Anagallis arvensis Rubiaceae - Madder Family GaUum angustifoUum SaUcaeeae - WiUow FamUy Salix lasiolepis var. braceUnae Solanaceae - Nightshade Family Datura meteloides Nicotiana glauca Solanum douglasii Monocotyledoneae Cyperaceae - Sedge FamUy Cyperus alternifoUus Scirpus sp. Myoporum CaUfornia Poppy Narrow-Leaf Plantain Long-Stemmed Eriogonum CaUfornia Buckwheat Curly Dock Pimpernel Narrowleaf Bedstraw Arroyo WiUow Jimson Weed Tree Tobacco Douglas Nightshade Umbrella Plant Bulrush iM Poaceae (Gramineae) - Grass FamUy Arundo donax Avena barbata Bromus diandrus Bromus moUis Bromus rubens Cortaderia atacamensis Cynodon dactylon Hordeum vulgare Lamarckia aurea LoUum perenne ssp. multiforum Paspalum dUatatum Peimisetum setaceum Phalaris canariensis Polypogon monspeUensis Sorghum halepense Stipa sp. Typhaceae - CattaU FamUy Typha sp. Giant Reed Slender WUd Oat Ripgut Grass Soft Chess FoxtaU Chess Pampas Grass Bermuda Grass Common Barley Goldentop ItaUan Ryegrass DaUis Grass Fountain Grass Canary Grass Rabbitfoot Grass Johnson Grass Bunchgrass CattaU 1. 2. Nomenclature foUows Munz, 1974. Species detected winter 1986-87 by WESTEC Services, Inc. throughout the area and June 1986 by R. Friesen on the Warmington parcel.