1 The Ecology and Conservation of California's Maritime Chaparral - PDF document

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, 2003 1

The Ecology and Conservation of California's Maritime Chaparral Monterey Bay maritime chaparral dynamics Eric Van Dyke & Karen Holl Mont erey Bay Area Marit ime Chaparral Acreage Calabasas/Buena Vista 54 Prunedale 2795 Fort Ord 11,049 Monterey Airport 25 Jacks Peak 152 (excluding pine forest understory) Del Monte Forest 10 (excluding pine forest understory) Palo Corona/Gibson Canyon 1078 Total maritime chaparral 15,163 Toro Park/Pine Canyon 2429 (inland chaparral) Mont erey Bay Area Marit ime Chaparral Rare Plant s A. hookeri ssp. hookeri Monterey Bay area A. montereyensis Fort Ord / Monterey Airport / Toro Park A. pajaroensis Prunedale hills A. pumila Fort Ord / Monterey Airport Ceanothus cuneatus var. Central coast rigidus Chorizanthe pungens var. Monterey Bay area pungens (FT) Ericameria fasciculata Monterey Bay area Piperia yadonii (FE) Prunedale / Del Monte Forest / Gibson Canyon Coastal Training Program Workshop Presentation January 17, 2003 2

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

The Ecology and Conservation of California's Maritime Chaparral Monterey Bay maritime chaparral dynamics Eric Van Dyke & Karen Holl Marit ime Chaparral Transit ion: Prunedale Hills 1975-2000 Coastal Training Program Workshop Presentation January 17, 2003 4

The Ecology and Conservation of California's Maritime Chaparral Monterey Bay maritime chaparral dynamics Eric Van Dyke & Karen Holl Result s: Result s: Tree and Shrub Layers Herb Layer • Same species composit ion • Fewer species (27 t o 18) • Same number of species per plot • Fewer species per plot • Higher percent cover (86% t o 99%) • St ill no Ar ct ost aphylos seedlings • Much higher A. paj ar oensis cover • But many more Q. agr if olia seedlings • Higher cover of t aller t rees/ shrubs • Not hing but vines under t all canopy • Lower cover of shor t er shrubs Coastal Training Program Workshop Presentation January 17, 2003 5

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

The Ecology and Conservation of California's Maritime Chaparral Monterey Bay maritime chaparral dynamics Eric Van Dyke & Karen Holl Marit ime Chaparral Transit ion: Long Valley 1931-1999 1999 1980 1974 1971 1968 1956 1952 1949 1937 1931 Aerial Phot ography I mage Analysis 1931 B&W 1:19,000 1937 B&W 1:20,000 1939 B&W 1:20,000 1949 B&W 1:20,000 1952 B&W 1:23,600 1956 B&W 1:20,000 1968 B&W 1:20,000 1971 B&W 1:20,000 1974 Color IR 1:24,000 1980 Color IR 1:12,000 1999 B&W ortho 2’/pixel Coastal Training Program Workshop Presentation January 17, 2003 7

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

The Ecology and Conservation of California's Maritime Chaparral Monterey Bay maritime chaparral dynamics Eric Van Dyke & Karen Holl 1971 1980 1999 Result s: 65% Chaparr al Loss (~1%/ yr) 180 145 Acres 110 75 40 1925 1945 1965 1985 2005 Year Chaparral Transit ion Fut ure Direct ions: Marit ime Chaparral Research & Management 1999 • Managing Fir e Regimes in t he Cont ext 1980 of Ot her Human I mpact s 1974 1971 1968 – Non-nat ive Species 1956 1952 – Habit at Fragment at ion 1949 1937 – Climat e Change 1931 • Managing Chaparral For Mult iple Species 0.1 0 0.1 0.2 Miles – Not J ust Shrubs Coastal Training Program Workshop Presentation January 17, 2003 9

The Ecology and Conservation of California's Maritime Chaparral Monterey Bay maritime chaparral dynamics Eric Van Dyke & Karen Holl 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 of Treat ment s – Met a-analysis Coastal Training Program Workshop Presentation January 17, 2003 10