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Vegetation Associations of a Serpentine Area: Coyote Ridge, Santa Clara County, California

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Vegetation Associations of a Serpentine Area: Coyote Ridge, Santa Clara County, California Vegetation associations of a serpentine area: Coyote Ridge, Santa Clara County, California By Julie Evens and Sau San California Native Plant Society 2707 K Street, Suite 1 Sacramento, CA 95816 In cooperation with the California Natural Heritage Program, California Department of Fish and Game And Santa Clara Valley Chapter of the California Native Plant Society November 2004 Copyright 2004 by the California Native Plant Society. All rights reserved. Except for brief quotations, no part of this book may be reproduced in any form or by any electronic or mechanical means without the prior permission of the publisher. Requests should be made to: California Native Plant Society 2707 K Street Suite 1 Sacramento CA 95816-5113 Phone: 916-447-2677 Table of Contents ABSTRACT…………………………………….. ....................................................................................................1 INTRODUCTION……………………………………. .............................................................................................1 METHODS………………………………… ............................................................................................................2 Study area..................................................................................................................................................2 Figure1. Map of study area at Coyote Ridge, Santa Clara County, California..............................................3 Site selection and sampling .......................................................................................................................4 Classification methods ..............................................................................................................................5 Existing Literature Review........................................................................................................................5 Cluster Analysis ........................................................................................................................................5 Classification.............................................................................................................................................7 Ordination analysis....................................................................................................................................8 Key ............................................................................................................................................................8 Description Writing...................................................................................................................................8 RESULTS……………………………………........................................................................................................10 CLASSIFICATION…………………………….. .....................................................................................................13 Table 1. Final classification of vegetation associations from Coyote Ridge, Santa Clara Valley, California .............................................................................................................................................14 Table 2. List of rare species with the number of occurrences denoted per association ..........................18 ORDINATION………………………………..........................................................................................................21 Figure 4. Graph from the Bray-Curtis ordination of the relevé samples, which are colored by their corresponding alliance.........................................................................................................................22 Figure 5. Graphs from the Bray-Curtis ordination of the rapid assessment surveys, which colored by their corresponding alliance.................................................................................................................23 Figure 6. Graph from Bray-Curtis ordination of the rapid assessment surveys, which are colored by their corresponding geologic substrate. ...............................................................................................24 DISCUSSION…………………………………. .....................................................................................................25 KEY……………………………………….. .........................................................................................................26 Table 3: Field key to the main groups and vegetation associations from Coyote Ridge. ......................27 DESCRIPTIONS…………………………………… ..............................................................................................33 TREE DOMINATED VEGETATION…………………..............................................................................................33 PINUS SABINIANA ALLIANCE ...........................................................................................................33 Pinus sabiniana/Grass-Herb (Lolium multiflorum-Nassella spp.-Plantago erecta) Association ...........33 Pinus sabiniana/Artemisia californica-Ceanothus ferrisiae-Heteromeles arbutifolia Woodland Unique Stands...................................................................................................................................................33 PLATANUS RACEMOSA ALLIANCE...................................................................................................35 Platanus racemosa- Quercus agrifolia-Populus fremontii-Salix laevigata Woodland Association.......35 i QUERCUS AGRIFOLIA ALLIANCE....................................................................................................36 Quercus agrifolia/Artemisia californica/Grass Woodland Association..................................................36 Quercus agrifolia/Heteromeles arbutifolia-Toxicodendron diversilobum Woodland and Forest ..........37 Quercus agrifolia/Rhamnus tomentella/Stachys pycnantha Woodland Association ..............................39 Quercus agrifolia/Toxicodendron diversilobum/Grass Woodland and Forest Association....................40 Quercus agrifolia-Umbellularia californica/Arctostaphylos glauca-Toxicodendron diversilobum/Grass Forest Association ...............................................................................................................................42 Quercus agrifolia-Umbellularia californica/Grass Woodland Association ...........................................44 Quercus agrifolia-Quercus lobata/Toxicodendron diversilobum/Grass Woodland Association............45 UMBELLULARIA CALIFORNICA ALLIANCE....................................................................................46 Umbellularia californica-Quercus agrifolia/Heteromeles arbutifolia-Toxicodendron diversilobum/Melica torreyana Forest Association.............................................................................46 SHRUB DOMINATED VEGETATION……….................................................................................................48 ADENOSTOMA FASCICULATUM ALLIANCE...................................................................................48 Adenostoma fasciculatum (pure) Shrubland Association........................................................................48 Adenostoma fasciculatum-Heteromeles arbutifolia/Melica torreyana Shrubland Association ..............49 ADENOSTOMA FASCICULATUM-ARCTOSTAPHYLOS GLAUCA ALLIANCE ...............................49 Adenostoma fasciculatum-Arctostaphylos glauca-Mimulus aurantiacus Shrubland Association ..........49 ADENOSTOMA FASCICULATUM-SALVIA MELLIFERA ALLIANCE ..............................................51 Adenostoma fasciculatum-Salvia mellifera (pure) Shrubland Association .............................................51 ARCTOSTAPHYLOS GLAUCA ALLIANCE.........................................................................................51 Arctostaphylos glauca Mixed (-Artemisia californica-Salvia mellifera) Shrubland Association...........52 Arctostaphylos glauca/Melica torreyana Shrubland Association...........................................................53 ARTEMISIA CALIFORNICA ALLIANCE.............................................................................................54 Artemisia californica-Ceanothus ferrisiae Shrubland Unique Stands ....................................................55 Artemisia californica/Eschscholzia californica-Grass Shrubland Association.......................................56 ARTEMISIA CALIFORNICA-SALVIA MELLIFERA ALLIANCE.........................................................58 Artemisia californica-Salvia mellifera (pure) Shrubland Association ....................................................58 BACCHARIS PILULARIS ALLIANCE..................................................................................................60 Baccharis pilularis/Annual Grass Shrubland Association......................................................................60 Baccharis pilularis-Artemisia californica-Heteromeles arbutifolia Shrubland Association ..................61 CERCOCARPUS BETULOIDES ALLIANCE.......................................................................................62 Cercocarpus betuloides-Adenostoma fasciculatum-Mimulus aurantiacus Shrubland Association........62 PRUNUS ILICIFOLIA ALLIANCE.......................................................................................................63 Prunus ilicifolia/Toxicodendron diversilobum/Grass Shrubland Association ........................................63 QUERCUS DURATA ALLIANCE.........................................................................................................64
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