Eastern prickly-pear (Opuntia humifusa) is the only member of the cactus family that is found in the northeastern states. It is found in a variety of habitats and is tolerant of extreme conditions, including the salt spray and wind influence of maritime red cedar forests. However, it is shade intolerant, and can be crowded out by the increasing canopy cover of forests. New York's only native cactus is often associated with red cedar. Interestingly, it grows in maritime red cedar forests on Long Island and red cedar rocky summits in the Hudson Valley.
There are very few occurrences of maritime red cedar forests in New York State. The only examples come from Suffolk County, Long Island. These occurrences are usually small and vulnerable to disturbance or destruction from development, wood-cutting or post-cutting, and off-road vehicle (ORV) abuse. Most of the known occurrences are on publicly owned property but need more protection.
The numbers and acreage of maritime red cedar forests in New York have probably declined slightly in recent decades due to development, fire suppression, and disturbance by off-road vehicles (ORVs).
The numbers and acreage of maritime red cedar forests in New York have probably had large declines from historical numbers due to the settlement and development of the area, fire suppression, and fragmentation.
The greatest threats to the maritime red cedar forest are commercial and residential development and recreational overuse. Development not only causes a reduction in the overall size of the forest but also the fragmentation of the forest into smaller units. The increased use of off-road vehicles (ORVs) causes erosion, fragmentation of the forest, and acts as a corridor for the invasion of exotic species. Presently, most of the ORV use is on the seaward edges of the community. Other threats include over-browsing by deer on seedlings and saplings which threatens the regeneration of forest canopy trees.
Management should focus on activities that help maintain regeneration of the species associated with this community. Deer have been shown to have negative effects on forest understories (Miller et al. 1992, Augustine & French 1998, Knight 2003) and management efforts should strive to ensure that regenerating trees and shrubs are not so heavily browsed that they cannot replace overstory trees. Other management considerations are: avoid cutting old growth examples, monitor for off road vehicle (ORV) abuse, control exotic and invasive species including the removal of black pine (Pinus nigra), and provide signage to make sure that visitors stay on trails.
Soils are sandy in and around this community and the effect of clearing and construction on soil retention and erosion must be considered during any development activities. Similarly, these sandy soils are nutrient-poor and any soil enrichment activities (septic leach fields, fertilized lawns, etc.) have a high probability of altering community structure and function.
Survey for and document additional sites for this natural community type. Need additional surveys at known locations to develop complete plant and animal species lists. In addition, detailed plot data is needed at known locations and any new sites that are found.
Research is needed to better define the composition of maritime and/or dune forests on Long Island in order to characterize variations between them. Collect sufficient plot data to support this classification. Locate other occurrences of maritime red cedar forests.
Maritime red cedar forests are currently found only on the shores of the coastal plain of Long Island within the zone influenced by salt spray. There are very few occurrences of this community type currently documented.
This maritime forest to woodland community dominated by red cedar (Juniperus virginiana) occurs on sand dunes, upper edges of salt marshes, and less commonly on rocky headlands of the northern and mid-Atlantic coast. This maritime forest to woodland community is naturally restricted to major coastal dune systems. An estimated 30 occurrences of this community type exist, ranging in size from less than an acre up to a maximum of 100, with an average size of less than 10 acres. This association occurs along the northern and mid-Atlantic coast from Virginia to Massachusetts and possibly up to Maine and Quebec (NatureServe Explorer 2009).
This maritime forest to woodland community occurs on sand dunes and is dominated by eastern red cedar (Juniperus virginiana). The physiognomy of this association is variable, ranging from dense tall-shrub thickets, to open woodlands, to closed canopy forest; trees are generally shorter than 4 m. Canopy trees are stunted and salt-pruned. Eastern red cedar (Juniperus virginiana) may form pure stands and is present in all tree and shrub layers. Other characteristic trees include post oak (Quercus stellata) and black cherry (Prunus serotina). Shrubs and vines include bayberry (Myrica pensylvanica), groundsel-tree (Baccharis halimifolia), poison ivy (Toxicodendron radicans), and Virginia creeper (Parthenocissus quinquefolia). Herb species include eastern prickly pear cactus (Opuntia humifusa), common hairgrass (Deschampsia flexuosa), little bluestem (Schizachyrium scoparium), switch grass (Panicum virgatum), and seaside goldenrod (Solidago sempervirens).
A conifer forest to woodland that occurs on dry sites near the ocean. Eastern red cedar (Juniperus virginiana) is the dominant tree, often forming nearly pure stands. Red cedar is usually present in all tree and shrub layers. Other characteristic trees include post oak (Quercus stellata) and black cherry (Prunus serotina).
Known examples of this community have been found at elevations between 5 feet and 7 feet.
This maritime red cedar forest is probably best seen in September and October when the bluish-black berry-like fruit ripens and migrating birds such as Cedar Waxwing can be seen devouring the berries.
This New York natural community encompasses all or part of the concept of the following International Vegetation Classification (IVC) natural community associations. These are often described at finer resolution than New York's natural communities. The IVC is developed and maintained by NatureServe.
This New York natural community falls into the following ecological system(s). Ecological systems are often described at a coarser resolution than New York's natural communities and tend to represent clusters of associations found in similar environments. The ecological systems project is developed and maintained by NatureServe.
Quercus stellata (post oak)
Baccharis halimifolia (groundsel-tree)
Parthenocissus quinquefolia (Virginia-creeper)
Opuntia humifusa (eastern prickly-pear)
Panicum virgatum (switch grass)
Solidago sempervirens (northern seaside goldenrod)
Augustine, A.J. and L.E. French. 1998. Effects of white-tailed deer on populations of an understory forb in fragmented deciduous forests. Conservation Biology 12:995-1004.
Clark, James. 1986. Coastal forest tree populations in a changing environment, southeastern Long Island, New York. Ecological Monographs 56(3): 259-277.
Conard, H.S. 1935. The plant associations of central Long Island. American Midland Naturalist 16:433-515.
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Edinger, Gregory J., D.J. Evans, Shane Gebauer, Timothy G. Howard, David M. Hunt, and Adele M. Olivero (editors). 2002. Ecological Communities of New York State. Second Edition. A revised and expanded edition of Carol Reschke's Ecological Communities of New York State. (Draft for review). New York Natural Heritage Program, New York State Department of Environmental Conservation. Albany, NY. 136 pp.
Greller, A. M. 1977. A classification of mature forests on Long Island, New York. Bulletin of the Torrey Botanical Club 104:376-382.
Knight, T.M. 2003. Effects of herbivory and its timing across populations of Trillium grandiflorum (Liliaceae). American Journal of Botany 90:1207-1214.
Lamont, E. and R. Stalter. 1991. The vascular flora of Orient Beach State Park, Long Island, New York. Bulletin of the Torrey Botanical Club 118(4): 459-468.
Latham, Roy. 1935. Flora of the State Park, Orient, Long Island, New York. Torreya 34:139-149.
Lundgren, J. 2000. Lower New England - Northern Piedmont Ecoregion Forest Classification. The Nature Conservancy, Conservation Science, Boston, MA. 72 pp.
Martin, W. E. 1959b. The vegetation of Island Beach State Park, New Jersey. Ecological Monographs 29:1-46.
Miller, S. G., S. P. Bratton, and J. Hadidian. 1992. Impacts of white-tailed deer on endangered and threatened vascular plants. Natural Areas Journal 12:67-74.
New York Natural Heritage Program. 2019. New York Natural Heritage Program Databases. Albany, NY.
Reschke, Carol. 1990. Ecological communities of New York State. New York Natural Heritage Program, New York State Department of Environmental Conservation. Latham, NY. 96 pp. plus xi.
Robichaud, B. and M.F. Buell. 1973. Vegetation of New Jersey: A study of landscape diversity. Rutgers Univ. Press. New Brunswick, NJ. 340 pp.
This guide was authored by: Shereen Brock
Information for this guide was last updated on: March 7, 2017
Please cite this page as:
New York Natural Heritage Program. 2019. Online Conservation Guide for Maritime red cedar forest. Available from: https://guides.nynhp.org/maritime-red-cedar-forest/. Accessed January 18, 2019.