Chapter 4.3 Biological Resources
Total Page:16
File Type:pdf, Size:1020Kb
Section 4.3 Biological Resources 4.3 BIOLOGICAL RESOURCES 4.3.1 Introduction This section presents existing RBC site biological resources and analyzes the potential for development under the 2014 LRDP to affect those resources. Information and analysis in this section is based on California Natural Diversity Database (CNDDB) searches (CNDDB 2012), several previous reports including RFS Habitat Assessment Report and RFS Constraints Analysis (Wildlife Research Associates and Jane Valerius Environmental Consulting 2011a, 2012), the RFS Remediation Project IS (URS 2003), UC Richmond Field Station’s Remnant Coastal Terrace Prairie (Amme 2005), RFS Grasslands Constraints Analysis (Wildlife Research Associates and Jane Valerius Environmental Consulting 2013a), URS (2007) Botanical Survey Report, The Watershed Project (2007) Remediation and Restoration Progress Report, Lidicker et al. (2003) compendium of flowering plants at the Richmond Field Station, The Manual of California Vegetation (Sawyer et al. 2009), and Richmond Field Station Remediation Project Biological Assessment Report (Blasland, Bouck, and Lee, Inc. 2003). A Tetra Tech biologist and professional wetland scientist conducted a site visit and general biological survey on January 4, 2013 (Tetra Tech 2013a). Tetra Tech biologists delineated wetlands on February 13 and 15, 2013 (Tetra Tech 2013b). The biological resources discussed in this section are vegetation communities, wildlife habitats, wildlife movement corridors, common wildlife, special-status plant and wildlife species, and sensitive natural communities, including wetlands. Public and agency NOP comments related to biological resources are summarized below: Conduct a thorough biological site survey; Analyze project impacts on all biological resources; The site contains remnant native coastal prairie grasslands that occur in very few locations, possibly only at this site; Native coastal prairie grasslands should be preserved on-site, and direct and indirect impacts should be prevented during construction and subsequent operations, including by use of buffer zones; Remnant California poppy (Eschscholzia californica) and Rancheria clover (Trifolium alborpurpureum) populations should be preserved in landscaping plans; Specify a weed management plan for the project, including controlling threats to the native grasslands, controlling invasive species such as Italian fennel and pampass grass in the marsh; Use local-endemic ecotypes wherever native plants are prescribed; Demolition, tree removal, construction, and restoration activities may impact wildlife; Impacts on species listed under the US or California Endangered Species Act, including California clapper rail, may require mitigation and permitting; Implement measures to reduce impacts on wildlife: minimize outdoor lighting, restrict human presence near sensitive habitats, control trash, reduce construction and operating noise, use bird-safe building standards, avoid structures that could serve as raptor perches near the shoreline, and provide setbacks from the shoreline; The project area is adjacent to recently restored wetlands; and Comply with local and regional land use laws, regulations, and plans. April 2014 4-55 Section 4.3 Biological Resources 4.3.2 Environmental Setting Vegetation Communities The project site has five general vegetation communities: native grasslands, non-native grasslands, ornamental/landscaping, eucalyptus stands, and tidal salt marsh (Figure 4-8). Native Grassland Native grassland communities include California oatgrass and purple needlegrass alliances. California oatgrass grassland is dominated by California oatgrass (Danthonia californica). Other species noted in this community includes soft chess (Bromus hordaceus), Italian ryegrass (Lolium multiflorum), English plantain (Plantago lanceolata) and bristly ox-tongue (Picris echioides). This community has been reported in all meadows except the Far North Meadow (URS 2007) (Figure 4-8). Harding grass (Phalaris aquatica), a non-native species, has invaded much of the oatgrass grassland areas and some areas are slowly transitioning into coastal scrub by the invasion of coyote brush (Baccharis pilularis) (URS 2007). Purple needlegrass grassland also occurs in several areas. Purple needlegrass (Nasella pulchra) is typically found in deep soils with high clay content. Nonnative species are also common in this community type and include rattail fescue (Vulpia myuros), sixweeks fescue (Vulpia bromoides), silver European hair grass (Aira caryophyllea), ripgut brome (Bromus diandrus), soft chess, and red brome (Bromus madritenisis). This community has been reported in all meadows except the Far North Meadow (URS 2007). California “coastal prairie” or “coastal terrace prairie” are “communities,” or conglomerations of native perennial and/or annual grasses that inhabit moist, temperate areas of the California coastal region. Such grasslands occurring along the north and central California coast experience a milder climate than interior grasslands, with weather mediated by fog. These grasslands are typically dense or tall and may be naturally patchy, reflecting differences in soils and moisture availability. Although none of the species found in a coastal prairie are necessarily rare or endangered, the grassland community itself is an uncommon configuration of species. As noted in Table 4.3-1 below, there are no known occurrences of special status (endangered or rare) plant species occurring at the RBC site. However, some plants occurring at the site are uncommon locally. A 1999 report estimated that moist grasslands occur on about 7,000 acres in the San Francisco Bay Area, a decline from approximately 60,000 acres in historic times (Goals Project 1999). Coastal terrace prairie may be characterized by different species; the oatgrass and purple needlegrass community at the RFS makes up an even smaller portion of the remaining moist grasslands. In addition to occurrences at the RFS, coastal prairie grasslands occur in the vicinity at portions of the San Pablo Peninsula, such as Point Molate (City of Richmond 2013). Coastal prairie grasslands also occur on Brooks Island (Goals Project 1999). The RFS occurrence of coastal terrace prairie is considered unique as “the only Coastal Terrace Prairie in lowland clay soils in the greater East Bay Area.” This soil type comprises the majority of the RBC site upland area (Amme 1993). A 1993 study concluded that “the remnant coastal prairie grassland at Richmond Field Station is scientifically and ecologically invaluable, and virtually impossible to recreate” (Amme 1993). In August of 1996, then-UC Berkeley Chancellor Chang-Lin Tien wrote then-Assembly member Tom Bates proposing, subject to approval, a commitment to incorporate a wetland and grassland reserve into long range plans at the Richmond Field Station. The letter identified approximately 8.7 acres of coastal grasslands at the RFS site, setting this acreage aside as a reserve. This acreage is at the core of the Natural Open Space proposed in the LRDP (Figure 4-8). April 2014 4-56 T T E E E E R R T T S HIGHWAY 58 S 0 H T T S 0 1 4 4 H H T E T R U L U A O O N S D POT S S RERO AVENUE O N S TR E E T C A R L S O T N E B E O U R L T H E S IG V H A T W R S AY 1 R D 4 58 O 0 S H E T W U O O O S D A V E N U H E IG T H E W E S AY R Y 5 T CA 8 S M 0 O D R R E 3 A 4 V EN H U T E U O S MEAKER AVENUE T E E U E N R E T V S A H IG H R T H T E E W 4 E K A 3 R Y A T 5 H E 8 S 0 T M N U C O A O Far North S D R S L N S A O L N R B E Meadow O M U E L A E D V E A S R T D R E E T REGATTA BOULEVARD Y A W ROBIN DRIVE L W O RO BIN DR IVE 580 Meadow M w e Eucalyptus M Y e A E o A W k D E G e S d Meadow N T I R r L E a R E D Y Y A T A A T e S W W i t T Y c E A J R M h G E ( t f r s e s e h w w W a D R EN h R D t R A IV t e E V T E r r E L E U c Big Meadow R o Y T O r A S B e W H A L T N T 6 e T W 4 A O k H G North T E U c R O S T u E PLO E l Meadow V R v E T R DR S e IV E H T r 7 4 t ) Northeast H T U O Meadow S CR OW DR IVE Y A W L W Gull O Y A W Meadow T E Y C A O W E REGATTA A BOULEVARD V ST A T M ON E TG R O ME G RY E A VEN EPA East UE Meadow N Meadow LA RK West DR IVE T E E R T Meadow S D N 2 3 H T U O S Central Meadow T M E A E RIN A L M R AKE e T S S D RIV ( e E ti k H d e EPA T a r 6 4 l s T i H lo d T u a Meadow S U l O g h C Y S c re A W h e a k H T n ER E n ON R e DR G l) IVE E E Y - 3 1 . 0 T C 2 / E D 2 I S 1 Y / A 1 B 1 d x E m DRIV . DE BAYSI v C P R R R e O Y O W r C S M I T N K _ O A D P s L N O J T A C R e O M O T c R V M C r Y E E O u D R C U R O o C R I U V O T s R E U e E BAY HARBOR DRIV T BAY HARBOR CT.