Perspectives and Processes in Revegetation of Arid and Semiarid Rangelands

Call, Christopher A.; Roundy, Bruce A.

doi:10.2307/4003034

Cited by 116 publications

(75 citation statements)

References 38 publications

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“…In arid and semiarid ecosystems, recovery processes in degraded rangelands are slow and stochastic (Call and Roundy, 1991;Visser et al, 2004), and the time span for improvement might last several decades (Allington and Valone, 2010;Wiegand and Milton, 1996), which is beyond what is relevant for management. Both the time needed and the lack of a promising natural restoration potential at DEG to support species which are common to sustainably managed rangelands, point towards the need for active interventions.…”

Section: Evaluation Of the Restoration Potentialmentioning

confidence: 99%

Species, functional groups and community structure in seed banks of the arid Nama Karoo: Grazing impacts and implications for rangeland restoration

Dreber

Oldeland

Rooyen

2011

Agriculture, Ecosystems & Environment

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Please cite this article in press as: Dreber, N., et al., Species, functional groups and community structure in seed banks of the arid Nama Karoo: Grazing impacts and implications for rangeland restoration. Agric. Ecosyst. Environ. (2011) The regeneration potential of grazing-affected Nama Karoo vegetation was evaluated by comparing soil seed banks of different microsites across a fence-line contrast in arid Namibia. Seed banks under low and high grazing pressure reflected the condition of the standing vegetation in terms of composition, community structure and species abundance distributions. However, a close concordance between vegetation and seed bank was restricted to the herbaceous and grassy vegetation within the inter-shrub matrix. The divergence of seed bank communities across the fence-line was low at community level but high at the level of species abundances. Continuous severe grazing increased the abundance of small-seeded, prostrate forbs with round seeds and favored unpalatable, annual grasses over palatable, perennial grasses. Microsites provided a source of small-scale variation in seed bank community composition and were dissimilar between the rangelands.Results indicated an advanced divergence in the vegetation at the degraded site with seed banks of species common under sustainable grazing being drastically reduced. Their low abundance, even in safe sites, suggests that long-distance dispersal is one of the main limiting factors for natural re-establishment after disturbance. The inertia in recovery of Namibian degraded rangelands through seed limitation can be overcome only by active species introduction.

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Section: Evaluation Of the Restoration Potentialmentioning

confidence: 99%

Species, functional groups and community structure in seed banks of the arid Nama Karoo: Grazing impacts and implications for rangeland restoration

Dreber

Oldeland

Rooyen

2011

Agriculture, Ecosystems & Environment

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“…ssp. cana) and other shrubs in restoration because of their importance in many aspects of the structure and functioning of ecosystems (Miller 1987, Allen 1988, Call and Roundy 1991, Pyke and Archer 1991. Silver sagebrush is common throughout the Northern Great Plains and occupies early to late successional communities on a variety of soils (Beetle 1960).…”

Section: Introductionmentioning

confidence: 99%

Establishment of silver sagebrush in the Northern Mixed Prairie

Romo¹,

Grilz²

2002

REM

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Interest has been expressed in using silver sagebrush (Artemisia cana Pursh ssp. cana) in restoring the Northern Mixed Prairie in Saskatchewan. The objectives of this study were to determine the effects of seedbed manipulation treatments and autumn or spring sowing on establishment of silver sagebrush on sites previously seeded to native, perennial grasses. Seeds (achenes) were sown by broadcasting at 20 pure live seeds m"2.Seedling emergence ranged from 5 to 6 % of seeds sown. Most seedlings emerged in May and June; no seedlings emerged after July or in the second year after planting. Seventy-four to 84% of emerging seedlings survived the first growing season with 96 to 98% of these seedlings establishing. On upland sites, seedling emergence (1.1 seedlings m'2 SE ± 0.1) and establishment (0.9 seedlings m 2 SE ± 0.1) were similar between autumn and spring sowing and among seedbed manipulation treatments. On lowland sites, seedling emergence (1.4 seedlings m 2 SE+0.2) and establishment (0.8 seedlings m'2 SE ± 0.2) were similar between autumn and spring seeding. Density of seedlings establishing was greatest when the seedbed was tilled. Establishment of silver sagebrush appears primarily limited by low numbers of seedlings emerging, indicating very specific safe site requirements for this shrub. (0.9 plantulas m_2 ES t 0.1) fueron similares entre las siembras de otoiio y primavera y entre los tratamientos de manipulacion de la cama de siembra. En los sitios bajos la emergencia de plantulas (1.4 plantulas m2 ES ± 0.2) y establecimiento (0.8 plantulas m 2 ES ± 0.2) fueron similares entre las siembras de otoi o y primavera. La densidad de plantulas establecidas fue mayor cuando la cama de siembra fue labrada. El establecimiento de "Silver sagebrush"parce ser limitado principalmente por el bajo numero de plantulas que emergen, indicando que este arbusto tiene requerimientos de sitio seguro muy especificos. En lugares donde se tienen establecidos zacates perennes no se requiere un disturbio drastico para establecer el "Silver sagebrush". Se recomienda sembrar el "Silver sagebrush"a fines de otono, cuando las temperaturas estan consistentemente bajo 0°C o a inicios de primavera, inmediatamente despues de que la nieve se derrite.

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“…This has been interpreted by some to mean that a number of native or introduced species, comprising a simple synthetic vegetation type is to be established (Call and Roundy 1991 ). Reclamation plans are often developed using a single seed mix, applied to a uniform thickness of cover soils on a uniform and gently rolling topography with only positive drainage over the entire mine site.…”

Section: Habitat Reclamation Considerationsmentioning

confidence: 99%

Creating Diverse Wildlife Habitat at La Plata Mine, Northwestern New Mexico, a Case Study: Part 2. Soils and Vegetation

Musslewhite¹,

Buchanan²,

Ramsey³

et al. 2001

ASMR

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Abstract. Biodiversity has increasingly become an important issue in determining the success of reclaimed minelands. The post-mine land-use of La Plata Mine is wildlife habitat, primarily for ungulates and small mammals. A reclamation plan was developed to promote biodiversity of reclaimed lands through the use of variable soil substrates, landscape features, and targeted seed mixes. A GIS was used to delineate the post-mine final surface contour into eight slope classes and eight aspect classes. The class information was used to develop four reclamation land types: I. Upland shrub -north aspects, 2. Upland shrub -south aspects, 3. Grassland, and 4. Drainage. These land types correspond to four reclamation vegetation types. Suitable spoil materials and coarse textured topsoil materials were targeted for use on strongly sloping areas to minimize soil loss. Finer textured topsoil materials were targeted for the grassland and drainage types. The replacement depth of topsoil and topsoil substitute materials was varied for the reclamation vegetation types. Pre-mine vegetation inventories were used to develop unique seed mixes ' specific to physical habitat conditions exhibited by each land-type. Research conducted at La Plata Mine found that topsoil replacement thickness less than 15 cm promotes shrub establishment and topsoil thickness greater than 30 cm promotes native grass species. Therefore, areas designated for shrub communities will receive an average of IO cm of topsoil or topsoil substitute material and the areas designated for grassland and drainage type communities will receive a minimum of 40 cm of topsoil.Additional

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Perspectives and Processes in Revegetation of Arid and Semiarid Rangelands

Cited by 116 publications

References 38 publications

Species, functional groups and community structure in seed banks of the arid Nama Karoo: Grazing impacts and implications for rangeland restoration

Species, functional groups and community structure in seed banks of the arid Nama Karoo: Grazing impacts and implications for rangeland restoration

Establishment of silver sagebrush in the Northern Mixed Prairie

Creating Diverse Wildlife Habitat at La Plata Mine, Northwestern New Mexico, a Case Study: Part 2. Soils and Vegetation

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