volutaria newport beach - california invasive plant council€¦ · volutaria in newport beach...

Volutaria in

Newport Beach

VOLUTARIA IN

NEWPORT BEACH

ECOLOGICAL IMPACTS

Newport Beach vs. to

Borrego Springs

Impact to native ecology

FUTURE MANAGEMENT

Where do we go from here?

HISTORY

More than we knew

Value of Early Detection

& accurate identification.

CURRENT SITUATION

Management to date

Scope of the infestation

Current management

History of the Newport Beach Infestation

Current Situation

Ecological Impacts

Future Management Actions and Goals

PO

INT

LO

MA

:K

EIR

MO

RS

E

87 88 89 90 91 92 93 94 95 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 1885 86 17 18

BO

RE

GG

O S

PR

ING

S:

1 p

lant

, R

T H

AW

KE

, F

eb 2

3

CH

UL

A V

IST

A:

JE

SS

E V

INJE

: Jun 6

VOLUTARIA THE CALIFORNIA INVASION

NE

WP

OR

T B

EA

CH

:B

AR

BA

RA

BO

ET

HLIN

G,

Mar

31

Big Canyon, Newport Beach

Mar 3, 2015

BARBARA BOETHLING

Jan 2

9

87 88 89 90 91 92 93 94 95 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 1885 86 17 18


NE

WP

OR

T B

EA

CH

:B

AR

BA

RA

BO

ET

HLIN

G,

Mar

31

Jan 8

PO

INT

LO

MA

:K

EIR

MO

RS

E

87 88 89 90 91 92 93 94 95 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 1885 86 17 18

BO

RE

GG

O S

PR

ING

S:

1 p

lant

, R

T H

AW

KE

, F

eb 2

3

CH

UL

A V

IST

A:

JE

SS

E V

INJE

: Jun 6


NE

WP

OR

T B

EA

CH

:B

AR

BA

RA

BO

ET

HLIN

G,

Mar

31

87 88 89 90 91 92 93 94 95 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 1885 86 17 18

NE

WP

OR

T B

EA

CH

:B

OB

DeR

UF

F,

May

1 p

hoto

BO

RE

GG

O S

PR

ING

S:

1 p

lant

, R

T H

AW

KE

, F

eb 2

3

NE

WP

OR

T B

EA

CH

:B

AR

BA

RA

BO

ET

HLIN

G,

Mar

31

CH

UL

A V

IST

A:

JE

SS

E V

INJE

: Jun 6

NE

WP

OR

T B

EA

CH

:B

OB

DeR

UF

F,

Mar

1,

Voucher


23 YEARS

PO

INT

LO

MA

:K

EIR

MO

RS

E

30 YEARS

Volutaria muricata

(=Centaurea muricata)

Volutaria tubuliflora

Volutaria’s

Volutaria tubuliflora

Sisymbrium ireo

Brassica nigra

Centaurea melitensis


Current Situation

Ecological Impacts


Big Canyon

Managed by Irvine Ranch

Conservancy, under contract

from City of Newport Beach

Gross cover: 2 acres

2015: 4,200 plants removed



Irvine Blvd.

Managed by Orange County Parks

Gross cover: 2.5 acres

2017: 4,000 plants treated or hand pulled


Current Situation

Ecological Impacts


• Disturbed sites

• Exposed soils

• Road edges, trail edges

• Seldom within native vegetation

Competition from non-native Brassica nigra

Volutaria Annual

Precipitation Niche

0 1 2 3 4 5 6 7 8 109 11 12 13 14 15 16 17 18 19 20 21 22

Anza-Borrego2010-current

Newport Beach1987-current

Canary IslandsHistorical

3.1

7 a

vg

.

10.6

3 a

vg

.

5.6

2 a

vg

.

Rainfall inches


Current Situation

Ecological Impacts


Big Canyon

Continuation of management by

Irvine Ranch Conservancy, under

contract by City of Newport Beach

Irvine Blvd.

Management by Orange County

Parks. Less certain.

Future Management

Needs:

Comprehensive annual surveys

throughout the entire bay. 3,300

acres.

Long term continueation of IRC

management contract in Big

Canyon.

Comprehensive management plan

by OC Parks at Irvine Blvd. colony.

VOLUTARIA IN

NEWPORT BEACH

Thank you to: Jason Giessow, Dendra, Inc.

Keir Morse, Biological Consultant, San Diego

Jennifer Naegele, Resource Specialist Orange Co. Parks

Riley Pratt, Irvine Ranch Conservancy

Ron Vanderhoff CA Native Plant Society, Orange County

[email protected]

volutaria newport beach - california invasive plant council€¦ · volutaria in newport beach...

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