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The Ecology and Conservation of California's Maritime Chaparral Monterey Bay maritime chaparral dynamics Eric Van Dyke & Karen Holl Marit ime Chaparral in t he Mont erey Bay Area Coastal Training Program Workshop Presentation January 17,

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1 Marit ime Chaparral in t he Mont erey Bay Area Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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2 Mont erey Bay Area Marit ime Chaparral Acreage

11,049 Fort Ord 2429 Toro Park/Pine Canyon

(inland chaparral)

15,163 1078 10 152 25 2795 54 Total maritime chaparral Palo Corona/Gibson Canyon Del Monte Forest

(excluding pine forest understory)

Jacks Peak

(excluding pine forest understory)

Monterey Airport Prunedale Calabasas/Buena Vista

Mont erey Bay Area Marit ime Chaparral Rare Plant s

Prunedale hills

A. pajaroensis

Monterey Bay area Ericameria fasciculata Prunedale / Del Monte Forest / Gibson Canyon Monterey Bay area Central coast Fort Ord / Monterey Airport Fort Ord / Monterey Airport / Toro Park Monterey Bay area Piperia yadonii (FE) Chorizanthe pungens var. pungens (FT) Ceanothus cuneatus var. rigidus

A. pumila
A. montereyensis
A. hookeri ssp. hookeri

Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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3 Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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4 Marit ime Chaparral Transit ion:

Prunedale Hills 1975-2000

Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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5 Result s:

Tree and Shrub Layers

Same species composit ion
Same number of species per plot
Higher percent cover (86% t o 99%)
Much higher A. paj ar oensis cover
Higher cover of t aller t rees/ shrubs
Lower cover of shor t er shrubs

Result s:

Herb Layer

Fewer species (27 t o 18)
Fewer species per plot
St ill no Ar ct ost aphylos seedlings
But many more Q. agr if olia seedlings
Not hing but vines under t all canopy

Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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6 Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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7 Marit ime Chaparral Transit ion:

Long Valley 1931-1999

1931 1937 1949 1952 1956 1968 1971 1974 1980 1999

Aerial Phot ography

1:20,000 B&W 1939 1:12,000 Color IR 1980 2’/pixel 1:24,000 1:20,000 1:20,000 1:20,000 1:23,600 1:20,000 1:20,000 1:19,000 B&W ortho Color IR B&W B&W B&W B&W B&W B&W B&W 1999 1974 1971 1968 1956 1952 1949 1937 1931

I mage Analysis Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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8 1931 1937 1949 1952 1956 1968 Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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9 1971 1980 1999 Result s:

65% Chaparr al Loss (~1%/ yr)

40 75 110 145 180 1925 1945 1965 1985 2005 Year Acres

Chaparral Transit ion

1931 1937 1949 1952 1956 1968 1971 1974 1980 1999 0.1 0.1 0.2 Miles

Fut ure Direct ions:

Marit ime Chaparral Research & Management

Managing Fir e Regimes in t he Cont ext
f Ot her Human I mpact s

– Non-nat ive Species – Habit at Fragment at ion – Climat e Change

Managing Chaparral For Mult iple

Species

– Not J ust Shrubs

Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003

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10 Fut ure Direct ions:

Marit ime Chaparral Management & Research

Managing Dist ur bance Acr oss t he

Landscape

– No “Right ” Management Regime

Resear ch Approaches

– Replicat ed Experiment s Test ing a Range

f Treat ment s

– Met a-analysis

Monterey Bay maritime chaparral dynamics The Ecology and Conservation of California's Maritime Chaparral Eric Van Dyke & Karen Holl Coastal Training Program Workshop Presentation January 17, 2003