oodland Restoration and Monitoring in the Bronx 9

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Friends of the Old Croton Aqueduct (FOCA)

https://www.youtube.com/watch?v=Qt5rIYNvcSk

Appendix I: Emerging Invasive Species in the Lower Hudson Valley

The following list is a brief report of emerging invasive species observed and, in most cases, treated by the

LHPRISM partners. These emerging species are ones that were recently introduced but not yet widespread in

the region. Some of the following were included on the 2017 BlockBuster Survey focal list, and their survey

observations will be noted below.

Cytisus scoparius

Scotch broom

Scotch Broom was on 3 properties during the 2018

season, with 12.95 acres managed. The majority

of the known sites are in Harriman and Bear

Mountain State Park with 12.32 acres managed by

the LH PRISM ISF Crew where all 42 reported sites

were visited. The 3rd site is a private property in

Orange County were 0.633 acres was managed by

the LH PRISM ISF Crew.

Corydalis incisa

Incised fumewort

In 2018, the partners of the Lower Hudson PRISM

treated incised fumewort over an area of 1.25

acres. With 0.25 acres by Teatown Lake

Reservation on Teatown lands and 1 acre by

Westchester County Parks at Croton Point Park.

Alnus glutinosa

European Alder

No management reported in 2018.

Actinidia polygama

Silver Vine

During the 2018 season a total of 4.11 acres were

treated within the LH PRISM. The significant site

of activity was in Mt Kisco, NY where, with the

combined efforts of the LH PRISM ISF crew and

NYC DEP, a total of 3.44 acres were treated. The

remaining Silver Vine site was within Sterling State

Forest where 0.67 acres were treated by the LH

PRISM ISF Crew.

Actinidia arguta

Hardy Kiwi

4 sites within the PRISM had treatments performed

for Hardy Kiwi during the 2018 season. Trillium

Invasive Species Management Inc. treated 1.03

acres in Bedford & Esopus, NY. While the PRISM

ISF crew treated 0.14 acres at the Brinton Brook

Sanctuary in Croton, NY and at a private residence

in Salt Point, NY.

Symplocos paniculata

Sapphire-berry

A total of 25.93 acres were managed by the LH

PRISM ISF crew during the 2018 season. With

4.96 acres at Carolins Grove in Pound Ridge, 1.12

acres at Cranberry Lake Preserve, 3.57 acres

within Mianus River Gorge and 16.28 acres at Ruth

Walgreen Franklin & Winifred Fels Sanctuary.

Arthraxon hispidus

Small Carpetgrass

During the 2018 season the LH PRISM ISF Crew

performed control work at two sites within the

PRISM totaling 0.02 acres impacted.

Brachypodium sylvaticum

Slender False Brome

Slender false brome was a new addition to the

emerging species list in 2016 with the discovery of

populations along Wappingers Creek in Dutchess

County. During the 2018 season the LH PRISM

ISF crew performed control over 2.75 acres at two

sites. Additional surveying revealed individual

plants downstream which will be managed during

the 2019 season.

Italian arum Arum italicum

No management efforts were reported in 2018.

Heracleum mantegazzianum Giant Hogweed

During the 2018 season the LH PRISM ISF crew

managed 22 sites for giant hogweed. Out of those 22,

treatment was necessary on 9 sites totaling 0.27 acres.

12 out of the 22 sites are now in the monitoring phase,

with 4 sites having no plants found for the first time, 5

are in the second year of monitoring and 3 are in the

third or fourth year of monitoring. The sites with no

plants found for the last 3 or more years are now

considered eradicated.

Hydrilla verticillata Water Thyme

During the 2018 season, 20.7 acres were managed.

With Scenic Hudson reporting 1.0 acres and NYC

DEP reporting 19.7 acres.

Lespedeza cuneata Chinese Bush-clover

No management reported for the 2018 season.

Phellodendron amurense Amur Corktree

No reported management efforts in 2018.

Amur corktree was a focal species for in 2017

BlockBuster Survey, no observations were reported.

Photinia villosa Oriental Photinia

In 2018 11.25 acres was managed by the LH

PRISM ISF Crew. Work took place at 5 public

natural areas within Westchester County.

Pueraria Montana Kudzu

During the 2018 season 2.70 acres was managed by

Trillium Invasive Species Management, INC. and the

LH PRISM ISF Crew with the assistance of the NYS

DEC.

Salvia glutinosa Sticky Sage

During the 2018 season Trillium Invasive Species

Management, INC. and the LH PRISM ISF Crew

performed control work for sticky sage over 49.62

acres in the Dover, NY area.

Viburnum dilatatum Linden Arrowwood

As a common garden plant Linden arrowwood has

been found escaping across the Lower Hudson

PRISM, particularly in Westchester County. During

the 2018 season 30.33 acres were managed within

the PRISM. With Trillium Invasive Species

Management, INC. reporting 3.5 acres managed and

the LH PRISM ISF Crew reporting 26.83 acres

managed.

Linden arrowwood was a focal species for in 2017

BlockBuster Survey, 2 observations were reported.

Viburnum plicatum Japanese Snowball

During the 2018 season Japanese snowball was

treated by the LH PRISM ISF Crew within Mianus

River Gorge, totaling 0.02 acres.

Viburnum sieboldii Siebold’s Arrowwood

The NYNJTC ISF crew performed treatment at 4

sites for Siebold’s arrowwood totaling 7.12 acres.

Siebold’s arrowwood was a focal species for in

Wisteria spp. Japanese Wisteria Chinese Wisteria

During the 2018 season 15.88 acres of Wisteria

was reported as managed. This includes both

Chinese (W. sinensis) and Japanese Wisteria (W.

floribunda).

Appendix II: LHPRISM Signed Partners and Participants

Partners listed in bold are elected from the membership to serve on the Steering Committee.

Signed Partners

1. Bedford Audubon Society

2. Black Rock Forest Consortium

3. The Bronx River Parkway Reservation Conservancy

4. Cary Institute of Ecosystem Studies

5. Constitution Marsh Audubon Center & Sanctuary

6. Cornell Cooperative Extension – Dutchess County

7. Cornell Cooperative Extension – Orange County

8. Cornell Cooperative Extension – Putnam County

9. Cornell Cooperative Extension – Rockland County

10. Ecological Research Institute

11. Friends of the Great Swamp

12. The Friends of the Old Croton Aqueduct

13. Glenn Sungela

14. Hike New York

15. Hudson Highlands Land Trust

16. Hudsonia

17. Hudson River Sloop Clearwater

18. Jay Heritage Center

19. Mianus River Gorge, Inc.

20. The Native Plant Center, a program of Westchester Community College Foundation

21. Natural Areas Conservancy

22. The New York Botanical Garden

23. New York City Department of Environmental Protection

24. New York City Department of Parks & Recreation

25. New York-New Jersey Trail Conference

26. Pace University

27. The Pound Ridge Land Conservancy Inc.

28. Putnam County Soil and Water Conservation District

29. Rye Nature Center

30. Saw Mill River Audubon

31. Scenic Hudson, Inc.

32. SOLitude Lake Management

33. Teatown Lake Reservation

34. The Invasives Project - Pound Ridge

35. Three Arrows Cooperative

36. Trillium Invasive Species Management, Inc.

37. Village of Tuxedo Park

38. Walter Daniels

39. Westchester County Parks, Recreation, Conservation

40. Westchester Land Trust

41. Winnakee Land Trust