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Juglans Californica, Southern California Black Walnut

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Juglans Californica, Southern California Black Walnut The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T35154A9915361 Juglans californica, Southern California Black Walnut Assessment by: World Conservation Monitoring Centre View on www.iucnredlist.org Citation: World Conservation Monitoring Centre. 1998. Juglans californica. The IUCN Red List of Threatened Species 1998: e.T35154A9915361. http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T35154A9915361.en Copyright: © 2015 International Union for Conservation of Nature and Natural Resources Reproduction of this publication for educational or other non-commercial purposes is authorized without prior written permission from the copyright holder provided the source is fully acknowledged. Reproduction of this publication for resale, reposting or other commercial purposes is prohibited without prior written permission from the copyright holder. For further details see Terms of Use. The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas A&M University; Wildscreen; and Zoological Society of London. If you see any errors or have any questions or suggestions on what is shown in this document, please provide us with feedback so that we can correct or extend the information provided. THE IUCN RED LIST OF THREATENED SPECIES™ Taxonomy Kingdom Phylum Class Order Family Plantae Tracheophyta Magnoliopsida Juglandales Juglandaceae Taxon Name: Juglans californica S.Watson Common Name(s): • English: Northern California Black Walnut, Southern California Black Walnut Assessment Information Red List Category & Criteria: Vulnerable A1c ver 2.3 Year Published: 1998 Date Assessed: January 1, 1998 Annotations: Needs Updating Previously Published Red List Assessments 1998 – Rare (R) Geographic Range Range Description: The species may be divided into two varieties, vars. californica and hindsii, both endemic to California. Walnut forest is a much fragmented and declining habitat. There are just two or three stands remaining of var. hindsii, although it is widely naturalised in parts of California and was formerly cultivated as a rootstock for J. regia, with which it readily hybridizes. Country Occurrence: Native: United States (California) © The IUCN Red List of Threatened Species: Juglans californica – published in 1998. 1 http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T35154A9915361.en Habitat and Ecology Systems: Terrestrial Threats (see Appendix for additional information) Threatened in several counties by urbanisation, grazing and possibly by the lack of natural reproduction. Credits Assessor(s): World Conservation Monitoring Centre © The IUCN Red List of Threatened Species: Juglans californica – published in 1998. 2 http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T35154A9915361.en Bibliography Flora of North America Editorial Committee. 1997. Flora of North America. Volume 3. Oxford University Press. Oldfield, S., Lusty, C. and MacKinven, A. (compilers). 1998. The World List of Threatened Trees. World Conservation Press, Cambridge, UK. Tibor, D. (compiler) 1998. Threatened tree information from the California Native Plant Society (unpublished). Wickens, G.E. 1995. Edible nuts. Non-wood Forest Products 5. Food and Agriculture Organization of the United Nations. Citation World Conservation Monitoring Centre. 1998. Juglans californica. The IUCN Red List of Threatened Species 1998: e.T35154A9915361. http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T35154A9915361.en Disclaimer To make use of this information, please check the Terms of Use. External Resources For Images and External Links to Additional Information, please see the Red List website. Threats (http://www.iucnredlist.org/technical-documents/classification-schemes) Threat Timing Scope Severity Impact Score 1. Residential & commercial development -> 1.1. Ongoing - - - Housing & urban areas Stresses: 1. Ecosystem stresses -> 1.1. Ecosystem conversion 1. Ecosystem stresses -> 1.2. Ecosystem degradation 2. Agriculture & aquaculture -> 2.1. Annual & Ongoing - - - perennial non-timber crops -> 2.1.4. Scale Unknown/Unrecorded Stresses: 1. Ecosystem stresses -> 1.1. Ecosystem conversion 1. Ecosystem stresses -> 1.2. Ecosystem degradation 2. Agriculture & aquaculture -> 2.3. Livestock farming Ongoing - - - & ranching -> 2.3.4. Scale Unknown/Unrecorded Stresses: 1. Ecosystem stresses -> 1.1. Ecosystem conversion 1. Ecosystem stresses -> 1.2. Ecosystem degradation © The IUCN Red List of Threatened Species: Juglans californica – published in 1998. 3 http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T35154A9915361.en The IUCN Red List of Threatened Species™ ISSN 2307-8235 (online) IUCN 2008: T35154A9915361 The IUCN Red List Partnership The IUCN Red List of Threatened Species™ is produced and managed by the IUCN Global Species Programme, the IUCN Species Survival Commission (SSC) and The IUCN Red List Partnership. The IUCN Red List Partners are: BirdLife International; Botanic Gardens Conservation International; Conservation International; Microsoft; NatureServe; Royal Botanic Gardens, Kew; Sapienza University of Rome; Texas A&M University; Wildscreen; and Zoological Society of London. THE IUCN RED LIST OF THREATENED SPECIES™ © The IUCN Red List of Threatened Species: Juglans californica – published in 1998. 4 http://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T35154A9915361.en.
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