Natural Resources
Conservation Service
Ecological site F134XY012MO
Sandy Exposed Backslope Woodland
Accessed: 12/03/2024
General information
Provisional. A provisional ecological site description has undergone quality control and quality assurance review. It contains a working state and transition model and enough information to identify the ecological site.
Figure 1. Mapped extent
Areas shown in blue indicate the maximum mapped extent of this ecological site. Other ecological sites likely occur within the highlighted areas. It is also possible for this ecological site to occur outside of highlighted areas if detailed soil survey has not been completed or recently updated.
MLRA notes
Major Land Resource Area (MLRA): 134X–Southern Mississippi Valley Loess
The Southern Mississippi Valley Loess (outlined in red on the map; northern portion only) is a relatively narrow strip of the coastal plain bordering the Mississippi River valley, that is blanketed with loess. The northern part of this MLRA, discussed here, is locally referred to as Crowley’s Ridge. Elevation ranges from about 300 feet on the footslopes to nearly 600 feet on the highest ridges. Loess caps the summits and upper slopes, and Pliocene-aged sand and gravel deposits of the coastal plain influence soils on lower, steeper slopes.
Classification relationships
Terrestrial Natural Community Type in Missouri (Nelson, 2010):
The reference state for this ecological site is most similar to a Dry Sand Woodland.
Missouri Department of Conservation Forest and Woodland Communities (Missouri Department of Conservation, 2006):
The reference state for this ecological site is most similar to a Mixed Oak Woodland.
National Vegetation Classification System Vegetation Association (NatureServe, 2010):
The reference state for this ecological site is most similar to a Quercus stellata - Quercus marilandica - Quercus falcata / Schizachyrium scoparium Sand Woodland (CEGL002417).
Geographic relationship to the Missouri Ecological Classification System (Nigh & Schroeder, 2002):
This Ecological Site occurs in the Crowley’s Ridge Subsection.
Ecological site concept
Sandy Exposed Backslope Woodlands are within the green areas on the map (Missouri portion only; distributions farther south are currently under review). They occupy the southerly and westerly aspects of steep, dissected slopes, and are mapped in complex with the Sandy Protected Backslope Forest ecological site. These sites are on the easternmost uplands of Crowley’s Ridge in Stoddard and Dunklin counties, Missouri. They are directly downslope from Loess Backslope ecological sites, and are mapped in complex with them. Soils are very deep and sandy. The reference plant community is woodland with an overstory dominated by black oak, white oak, and southern red oak, and a ground flora of native grasses and forbs.
Table 1. Dominant plant species
| Tree |
(1) Quercus alba |
|---|---|
| Shrub |
(1) Cornus florida |
| Herbaceous |
(1) Helianthus microcephalus |
Physiographic features
This site is on upland backslopes, with slopes of 15 to 35%. It is on exposed aspects (south, southwest, and west), which receive significantly more solar radiation than the protected aspects. The site receives runoff from upslope summit and shoulder sites, and generates runoff to adjacent, downslope ecological sites. This site does not flood.
Table 2. Representative physiographic features
| Landforms |
(1)
Hill
|
|---|---|
| Flooding frequency | None |
| Ponding frequency | None |
| Slope | 15 – 35% |
| Aspect | S, SW, W |
Climatic features
Table 3. Representative climatic features
| Frost-free period (characteristic range) | 167-182 days |
|---|---|
| Freeze-free period (characteristic range) | 198-215 days |
| Precipitation total (characteristic range) | 46-47 in |
| Frost-free period (actual range) | 163-186 days |
| Freeze-free period (actual range) | 193-220 days |
| Precipitation total (actual range) | 45-47 in |
| Frost-free period (average) | 175 days |
| Freeze-free period (average) | 207 days |
| Precipitation total (average) | 46 in |
Figure 2. Monthly precipitation range
Figure 3. Monthly minimum temperature range
Figure 4. Monthly maximum temperature range
Figure 5. Monthly average minimum and maximum temperature
Figure 6. Annual precipitation pattern
Figure 7. Annual average temperature pattern
Climate stations used
-
(1) ADVANCE 1 S [USW00093825], Advance, MO
-
(2) MALDEN MUNI AP [USC00235207], Malden, MO
Influencing water features
Soil features
These soils have acidic subsoils that are low in bases. The soils were formed under woodland vegetation, and have thin, light-colored surface horizons. Parent material is coastal plain sediments. They are sandy throughout. These soils are not affected by seasonal wetness. Soil series associated with this site include Eustis.
Table 4. Representative soil features
| Surface texture |
(1) Fine sand |
|---|---|
| Family particle size |
(1) Sandy |
| Drainage class | Somewhat excessively drained |
| Permeability class | Rapid |
| Surface fragment cover <=3" | Not specified |
| Surface fragment cover >3" | Not specified |
| Available water capacity (0-40in) |
3 in |
| Calcium carbonate equivalent (0-40in) |
Not specified |
| Electrical conductivity (0-40in) |
2 mmhos/cm |
| Sodium adsorption ratio (0-40in) |
Not specified |
| Soil reaction (1:1 water) (0-40in) |
4.5 – 5.5 |
| Subsurface fragment volume <=3" (Depth not specified) |
Not specified |
| Subsurface fragment volume >3" (Depth not specified) |
Not specified |
Ecological dynamics
In this region dominated by historic fire-prone prairies, savannas and open woodlands, Alfic Chert Protected Backslope Woodlands occur in relatively protected landscape positions on lower, steep slopes in the deeper valleys furthest from the prairie uplands. While the upland prairies and savannas had an estimated fire frequency of 1-3 years, Alfic Chert Exposed Backslope Woodlands burned less frequently (estimated 5-20 years) and with lower intensity.
The composition and structure of the Alfic Chert Backslopes varies in relation to slope aspect. Exposed, south and west facing slopes are more droughty and fire-prone than are the protected north and east facing slopes, which are relatively cool and moist. Consequently, a separate Ecological Site is recognized on the protected aspects (Alfic Chert Protected Backslope Forests), which forms a complex with the Exposed Backslope Forests. These two ecological sites intergrade on neutral, northwest and southeast exposures.
The south and west facing slopes of the Alfic Chert Exposed Backslope Woodlands have an open woodland structure with 70-80% canopy closure, a sparse subcanopy layer and an abundant woodland ground flora. Canopy tree species tolerant of drought and fire, such as black oak and post oak, share dominance with white oak.
Historically, grazing by native herbivores and periodic fires kept understory conditions more open. In addition, Alfic Chert Exposed Backslope Woodlands are subject to occasional disturbances from wind and ice, which periodically open the canopy up by knocking over trees or breaking substantial branches of canopy trees. The role of wind and ice in this region has been apparent during the early 2000s. Such canopy disturbances allow more light to reach the ground and favor reproduction of the dominant oak species.
Today, these communities have either been cleared and converted to pasture, or have undergone repeated timber harvest and domestic grazing. Most existing occurrences have a younger (50-80 years) canopy layer whose composition may have been altered by timber harvesting practices. An increase in hickories over historic conditions is common. In addition, in the absence of fire, the canopy, sub-canopy and woody understory layers are better developed. The diversity and cover of woodland ground flora has diminished in the more shaded conditions.
Domestic grazing has also diminished the diversity and cover of forest ground flora species, and has often introduced weedy species such as gooseberry, buckbrush, poison ivy and Virginia creeper. Grazed sites also have a more open understory. In addition, soil compaction and erosion related to grazing can lower productivity.
Alfic Chert Exposed Backslope Woodlands are productive timber sites. Timber harvest in this region typically is done using single-tree selection, and often results in removal of the most productive trees, or high-grading of the stand. This can result in poorer quality timber and a shift in species composition away from more valuable oak species. Carefully planned single tree selection or the creation of group openings can help regenerate more desirable oak species and increase vigor on the residual trees. Clear-cutting does occur and results in dense, even-aged stands of primarily oak. This may be most beneficial for existing stands whose composition has been highly altered by past management practices. However, without some thinning of the dense stands, the ground flora diversity can be shaded out and productivity of the stand may suffer.
Prescribed fire can also play a beneficial role in the management of this ecological site. While woodland restoration using fire is a viable option, the higher productivity of these sites makes it more challenging than on the other woodland sites in the region. Control of woody species will be more difficult. Excellent woodland restoration on these steep exposed aspects has been achieved.
State and transition model
Figure 8. Alfic Chert Exposed Backslope Woodlands
More interactive model formats are also available.
View Interactive Models
More interactive model formats are also available.
View Interactive Models
Click on state and transition labels to scroll to the respective text
Ecosystem states
States 1, 5 and 6 (additional transitions)
States 2 and 5 (additional transitions)
State 1 submodel, plant communities
State 2 submodel, plant communities
State 3 submodel, plant communities
State 4 submodel, plant communities
State 5 submodel, plant communities
State 6 submodel, plant communities
State 1
Reference State: Old Growth Woodland
The historical reference state for this Ecological Site was old growth oak woodland. The Old Growth Woodland was dominated by black oak, post oak and white oak. Maximum tree age was likely 150-300 years. Periodic disturbances from fire, wind or ice maintained the woodland structure and diverse ground flora species. Long disturbance-free periods allowed an increase in both the density of trees and the abundance of shade tolerant species. Two community phases are recognized in the Old Growth Woodland state, with shifts between phases based on disturbance frequency. Old Growth Woodlands are very rare today. Many sites have been converted to non-native pasture (State #5). Others have been subject to repeated, high-graded timber harvest coupled with domestic livestock grazing (State #6). Fire suppression has resulted in increased canopy density, which has affected the abundance and diversity of ground flora. Many Old Growth Woodlands have been managed effectively for timber harvest, resulting in either even-age (State 2) or uneven-age (State 3) woodlands.
Community 1.1
Black Oak, White Oak, Hickory Woodland
Due to their high productivity, Black Oak, White Oak, Hickory Woodlands resemble forests structurally. However, the southern and western exposure limits tree density and provides enough light for woodland ground flora species to persist. The tree canopy is dominated by a mix of black, post and white oak, and the understory is relatively open with scattered oak and sassafras saplings. This woodland community has a two-tiered structure, and a canopy that is 60-80 feet tall with 60-80% closure. Historically, these exposed slopes likely burned every 5-10 years, so ground flora cover was greater than 75%. During long, fire-free intervals the density of trees and saplings increased, as did fire-intolerant tree species such as hickory. Over time, these gradual species changes and increased density result in a community phase transition to the Mixed Oak, Hickory Dense Woodland (Community Pathway 1.1A to Community Phase 1.2 on the State & Transition Diagram). Unlike the forest communities on protected slopes, the persistence of oak as a dominant canopy species is not threatened on the exposed slopes.
Community 1.2
Mixed Oak, Hickory Dense Woodland
Due to their high productivity, Mixed Oak, Hickory Dense Woodlands resemble forests structurally. However, the southern and western exposure limits tree density and provides enough light for woodland ground flora species to persist. The tree canopy is dominated by a dense mix of black, post and white oak, and hickory species. The understory is relatively dense, with scattered hickory, oak and sassafras saplings. This woodland community has a multi-tiered structure, and a canopy that is 60-80 feet tall with 80-100% closure. The dense canopy closure has suppressed the ground flora in this community. Historically, these exposed slopes likely burned every 5-10 years, which helped to maintain a more open canopy, increased the ground flora cover, and enabled more oak regeneration. However, unlike the forest communities on protected slopes, the persistence of oak as a dominant canopy species is not threatened on the exposed slopes. Over time, these gradual species changes and decreased density result in a community phase transition to the Mixed Oak Woodland (Community Pathway 1.2A to Community Phase 1.1 on the State & Transition Diagram).
Pathway 1.1A
Community 1.1 to 1.2
This pathway is a gradual transition that results from extended, disturbance-free periods of roughly 50 years or longer.
Pathway 1.2A
Community 1.2 to 1.1
This pathway results from ecological disturbances such as fire, ice storms, or violent wind storms. Historically, native grazers such as bison provided disturbance events as well.
State 2
Even-Aged Managed State
This state starts with a sequence of early seral mixed oak woodlands, which mature over time. These woodlands tend to be rather dense, with a depauperate understory and ground flora. Thinning can increase overall tree vigor and improve understory diversity. However, in the absence of fire, the diversity and cover of the ground flora is still diminished. Continual timber management, depending on the practices used, will either maintain this state, or convert the site to uneven-age (State 3) woodlands. Prescribed fire without extensive timber harvest will, over time, cause a transition to Managed Oak Woodlands (state 4).
Community 2.1
Early Seral Mixed Oak Woodland
This woodland community has a simple, dense, single-tiered structure, with canopy height that varies with age, and 100% canopy closure. The understory and ground flora is depauperate. Thinning can increase overall tree vigor and improve understory diversity. However, in the absence of fire, the diversity and cover of the ground flora is still diminished. If the community is not subject to disturbance, it will mature over time and transition into a Even-Age Mixed Oak Woodland community (Community Pathway 2.1A to Community Phase 2.2 on the State & Transition Diagram).
Community 2.2
Even-Age Mixed Oak Woodland
This woodland community has a single-tiered structure, with canopy height that varies with age, and 80-100% canopy closure. The understory and ground flora is depauperate. Thinning can increase overall tree vigor and improve understory diversity. However, in the absence of fire, the diversity and cover of the ground flora is still diminished. Clearcutting or catastrophic disturbance will cause a transition to the Early Seral Mixed Oak Woodland community (Community Pathway 2.2A to Community Phase 2.1 on the State & Transition Diagram).
Pathway 2.1A
Community 2.1 to 2.2
This pathway is a gradual transition that results from limited disturbance for 60-90 years.
Pathway 2.2A
Community 2.2 to 2.1
This pathway typically results from even-age forestry management techniques such as clear-cutting. It can also result from catastrophic events such as severe ice or wind storms.
State 3
Uneven-Age Managed State
Uneven-Age Managed Woodlands resemble their Reference State (Old Growth Woodlands). The biggest difference is tree age, most being only 50-90 years old. Composition is also likely altered from the reference state depending on tree selection during harvest. In addition, without a regular 15-20 year harvest re-entry into these stands, they will slowly increase in more shade tolerant species and white oak will become less dominant. Uneven Age Managed Woodland is also dense because of fire suppression, but less so than the Even-Age Managed state. Consequently, the woodland ground flora is less suppressed and structural diversity is better maintained. Without periodic disturbance, stem density and fire intolerant species, like hickory, increase in abundance.
Community 3.1
Uneven-Age Mixed Oak Woodland
This woodland community has a multi-tiered structure, and 60-90% canopy closure. If the community is not subject to disturbance, it will mature over time and transition into an Uneven-Age Mixed Oak, Hickory Dense Woodland community (Community Pathway 3.1A to Community Phase 3.2 on the State & Transition Diagram).
Community 3.2
Uneven-Age Mixed Oak, Hickory Dense Woodland
This woodland community has a multi-tiered structure, and 80-100% canopy closure. If the community is subject to periodic selective timber harvest or other patchy disturbance events, it will transition into an Uneven-Age Mixed Oak Woodland community (Community Pathway 3.2A to Community Phase 3.1 on the State & Transition Diagram).
Pathway 3.1A
Community 3.1 to 3.2
This pathway is a gradual transition that results from extended, disturbance-free periods of roughly 50 years or longer.
Pathway 3.2A
Community 3.2 to 3.1
This pathway typically results from uneven-age forestry management techniques such as selective cutting, with a 15 year rotation and a maximum timber tree age of 120 years.
State 4
Managed Oak Woodland State
The Managed Oak Woodland State results from managing woodland communities in States 2 or 3 with prescribed fire, over time. This state resembles the reference state, with younger maximum tree ages and lower ground flora diversity.
Community 4.1
Mixed Oak Woodland
This woodland community has a single to two-tiered structure, and 70-90% canopy closure.
State 5
Non-native Pasture State
Type conversion of woodlands to planted, non-native pasture species such as tall fescue has been common in this area. Steep slopes, abundant surface fragments, low organic matter contents and soil acidity make non-native pastures difficult to maintain in a healthy, productive state on this ecological site. If grazing and active pasture management are discontinued, the site will eventually transition to State 2 (Even-Age). Timber Stand Improvement practices can hasten this process.
Community 5.1
Fescue / Mixed Pasture
This is an herbaceous community that is typically dominated by tall fescue. Various other grass and forb species are typically present, in various amounts. Shrub and pioneer tree species such as eastern redcedar and black locust typically invade sites that are not regularly managed.
State 6
High-Graded/Grazed State
Timbered sites subjected to repeated, high-graded timber harvests and domestic grazing transition to this State. This state exhibits an over-abundance of hickory and other less desirable tree species, and weedy understory species such as buckbrush, gooseberry, poison ivy and Virginia creeper. The vegetation offers little nutritional value for cattle, and excessive stocking damages tree boles, degrades understory species composition and results in soil compaction and accelerated erosion and runoff. Exclusion of cattle from sites in this state coupled with uneven-age management techniques will cause a transition to State 3 (Uneven-Age).
Community 6.1
Hickory, Oak / Buckbrush Woodland
This woodland community has a multi-tiered structure, with irregular, variable canopy closure.
Transition T1A
State 1 to 2
This transition typically results from even-age timber management practices, such as clear-cut, seed tree or shelterwood harvest.
Transition T1B
State 1 to 3
This transition typically results from uneven-age timber management practices, such as single tree or group selection harvest.
Restoration pathway R1B
State 1 to 3
This restoration pathway generally requires uneven-age timber management practices, such as single tree or group selection harvest, with extended rotations that allow mature trees to exceed ages of about 150 years. Prescribed fire is part of the restoration process. Mechanical thinning may be necessary in dense woodlands.
Restoration pathway R1A
State 1 to 4
This restoration pathway generally requires uneven-age timber management practices, such as single tree or group selection harvest, with extended rotations that allow mature trees to exceed ages of about 150 years. Prescribed fire is part of the restoration process.
Transition T1C
State 1 to 5
This transition is the result of clearing the woodland community and planting pasture species. Soil erosion can be extensive in this process, along with loss of organic matter. Liming and fertilizing associated with pasture management typically raises the soil pH and increases the cation concentration (such as calcium and magnesium) of the upper soil horizons.
Transition T1D
State 1 to 6
This transition is the result of poorly planned timber harvest techniques such as high-grading, accompanied by unmanaged cattle grazing. Soil erosion and compaction often result from cattle grazing after the understory has been damaged.
Transition T2A
State 2 to 3
This transition typically results from uneven-age timber management practices, such as single tree or group selection harvest.
Transition T2B
State 2 to 4
This transition is the result of the systematic application of prescribed fire. Mechanical thinning may also be used.
Transition T3A
State 3 to 2
This transition typically results from even-age timber management practices, such as clear-cut, seed tree or shelterwood harvest.
Transition T3B
State 3 to 4
This transition is the result of the systematic application of prescribed fire. Mechanical thinning may also be used.
Transition T4A
State 4 to 2
This transition typically results from even-age timber management practices, such as clear-cut, seed tree or shelterwood harvest.
Transition T4B
State 4 to 3
This transition typically results from uneven-age timber management practices, such as single tree or group selection harvest.
Transition T5A
State 5 to 2
This transition results from the cessation of cattle grazing and associated pasture management such as mowing and brush-hogging. Herbicide application, tree planting and timber stand improvement techniques can speed up this otherwise very lengthy transition.
Transition T6B
State 6 to 3
This transition typically results from uneven-age timber management practices, such as single tree or group selection harvest. Tree planting, mechanical thinning and other timber stand improvement techniques may be helpful to decrease the transition time.
Transition T6A
State 6 to 5
This transition is the result of clearing the woodland communities and planting pasture species. Soil erosion can be extensive in this process, along with loss of organic matter. Liming and fertilizing associated with pasture management typically raises the soil pH and increases the cation concentration (such as calcium and magnesium) of the upper soil horizons.
Additional community tables
Table 5. Community 1.1 forest overstory composition
| Common name | Symbol | Scientific name | Nativity | Height (ft) | Canopy cover (%) | Diameter (in) | Basal area (square ft/acre) |
|---|---|---|---|---|---|---|---|
|
Tree
|
|||||||
| shortleaf pine | PIEC2 | Pinus echinata | – | – | – | – | – |
| scarlet oak | QUCO2 | Quercus coccinea | – | – | – | – | – |
| white oak | QUAL | Quercus alba | Native | – | – | – | – |
| post oak | QUST | Quercus stellata | Native | – | – | – | – |
| black oak | QUVE | Quercus velutina | Native | – | – | – | – |
Table 6. Community 1.1 forest understory composition
| Common name | Symbol | Scientific name | Nativity | Height (ft) | Canopy cover (%) | |
|---|---|---|---|---|---|---|
|
Grass/grass-like (Graminoids)
|
||||||
| little bluestem | SCSC | Schizachyrium scoparium | Native | – | – | |
| Bosc's panicgrass | DIBO2 | Dichanthelium boscii | – | – | – | |
| hairy woodland brome | BRPU6 | Bromus pubescens | – | – | – | |
| whitetinge sedge | CAAL25 | Carex albicans | – | – | – | |
| little bluestem | SCSC | Schizachyrium scoparium | – | – | – | |
|
Forb/Herb
|
||||||
| elmleaf goldenrod | SOUL2 | Solidago ulmifolia | – | – | – | |
| American hogpeanut | AMBR2 | Amphicarpaea bracteata | – | – | – | |
| smooth small-leaf ticktrefoil | DEMA2 | Desmodium marilandicum | – | – | – | |
| pointedleaf ticktrefoil | DEGL5 | Desmodium glutinosum | – | – | – | |
| hairy sunflower | HEHI2 | Helianthus hirsutus | – | – | – | |
| Arkansas bedstraw | GAAR4 | Galium arkansanum | – | – | – | |
| eastern beebalm | MOBR2 | Monarda bradburiana | – | – | – | |
| feathery false lily of the valley | MARA7 | Maianthemum racemosum | – | – | – | |
| fourleaf milkweed | ASQU | Asclepias quadrifolia | – | – | – | |
| bristly buttercup | RAHI | Ranunculus hispidus | – | – | – | |
| fire pink | SIVI4 | Silene virginica | – | – | – | |
| rue anemone | THTH2 | Thalictrum thalictroides | – | – | – | |
| manyray aster | SYAN2 | Symphyotrichum anomalum | – | – | – | |
| American ipecac | GIST5 | Gillenia stipulata | – | – | – | |
| spotted geranium | GEMA | Geranium maculatum | – | – | – | |
|
Shrub/Subshrub
|
||||||
| Blue Ridge blueberry | VAPA4 | Vaccinium pallidum | – | – | – | |
| fragrant sumac | RHAR4 | Rhus aromatica | – | – | – | |
| leadplant | AMCA6 | Amorpha canescens | – | – | – | |
|
Vine/Liana
|
||||||
| Virginia creeper | PAQU2 | Parthenocissus quinquefolia | – | – | – | |
| summer grape | VIAE | Vitis aestivalis | – | – | – | |
Interpretations
Supporting information
Contributors
Fred Young
Rangeland health reference sheet
Interpreting Indicators of Rangeland Health is a qualitative assessment protocol used to determine ecosystem condition based on benchmark characteristics described in the Reference Sheet. A suite of 17 (or more) indicators are typically considered in an assessment. The ecological site(s) representative of an assessment location must be known prior to applying the protocol and must be verified based on soils and climate. Current plant community cannot be used to identify the ecological site.
| Author(s)/participant(s) | |
|---|---|
| Contact for lead author | |
| Date | |
| Approved by | |
| Approval date | |
| Composition (Indicators 10 and 12) based on | Annual Production |
Indicators
-
Number and extent of rills:
-
Presence of water flow patterns:
-
Number and height of erosional pedestals or terracettes:
-
Bare ground from Ecological Site Description or other studies (rock, litter, lichen, moss, plant canopy are not bare ground):
-
Number of gullies and erosion associated with gullies:
-
Extent of wind scoured, blowouts and/or depositional areas:
-
Amount of litter movement (describe size and distance expected to travel):
-
Soil surface (top few mm) resistance to erosion (stability values are averages - most sites will show a range of values):
-
Soil surface structure and SOM content (include type of structure and A-horizon color and thickness):
-
Effect of community phase composition (relative proportion of different functional groups) and spatial distribution on infiltration and runoff:
-
Presence and thickness of compaction layer (usually none; describe soil profile features which may be mistaken for compaction on this site):
-
Functional/Structural Groups (list in order of descending dominance by above-ground annual-production or live foliar cover using symbols: >>, >, = to indicate much greater than, greater than, and equal to):
Dominant:
Sub-dominant:
Other:
Additional:
-
Amount of plant mortality and decadence (include which functional groups are expected to show mortality or decadence):
-
Average percent litter cover (%) and depth ( in):
-
Expected annual annual-production (this is TOTAL above-ground annual-production, not just forage annual-production):
-
Potential invasive (including noxious) species (native and non-native). List species which BOTH characterize degraded states and have the potential to become a dominant or co-dominant species on the ecological site if their future establishment and growth is not actively controlled by management interventions. Species that become dominant for only one to several years (e.g., short-term response to drought or wildfire) are not invasive plants. Note that unlike other indicators, we are describing what is NOT expected in the reference state for the ecological site:
-
Perennial plant reproductive capability:
Print Options
Sections
Font
Other
The Ecosystem Dynamics Interpretive Tool is an information system framework developed by the USDA-ARS Jornada Experimental Range, USDA Natural Resources Conservation Service, and New Mexico State University.
Click on box and path labels to scroll to the respective text.