Restoring Western Ranges and Wildlands, vol. 2

Monsen, Stephen B.; Stevens, Richard D.; Shaw, Nancy L.

doi:10.2737/rmrs-gtr-136-v2

Cited by 42 publications

(50 citation statements)

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“…Current approaches to seed‐based restoration in the Great Basin have focused on sowing during late autumn and early winter when field soils are accessible with heavy planting machinery (Monsen et al . ). This practice presumes that seeds are either non‐dormant at the time of sowing or will lose dormancy over the winter period.…”

Section: Introductionmentioning

confidence: 97%

Seed germination and dormancy traits of forbs and shrubs important for restoration of North American dryland ecosystems

et al. 2018

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In degraded dryland systems, native plant community re-establishment following disturbance is almost exclusively carried out using seeds, but these efforts commonly fail. Much of this failure can be attributed to the limited understanding of seed dormancy and germination traits. We undertook a systematic classification of seed dormancy of 26 species of annual and perennial forbs and shrubs that represent key, dominant genera used in restoration of the Great Basin ecosystem in the western United States. We examined germination across a wide thermal profile to depict species-specific characteristics and assessed the potential of gibberellic acid (GA ) and karrikinolide (KAR ) to expand the thermal germination envelope of fresh seeds. Of the tested species, 81% produce seeds that are dormant at maturity. The largest proportion (62%) exhibited physiological (PD), followed by physical (PY, 4%), combinational (PY+PD, 4%), and morphophysiological (MPD, 1%) dormancy classes. The effects of chemical stimulants were temperature- and species-mediated. In general, mean germination across the thermal profile was improved by GA and KAR for 11 and five species, respectively. We detected a strong germination response to temperature in freshly collected seeds of 20 species. Temperatures below 10°C limited the germination of all except Agoseris heterophylla, suggesting that in their dormant state, the majority of these species are thermally restricted. Our findings demonstrate the utility of dormancy classification as a foundation for understanding the critical regenerative traits in these ecologically important species and highlight their importance in restoration planning. This article is protected by copyright. All rights reserved.

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Section: Introductionmentioning

confidence: 97%

Seed germination and dormancy traits of forbs and shrubs important for restoration of North American dryland ecosystems

et al. 2018

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“…While precipitation following outplanting was below average, average precipitation is still greater at 29 cm/yr in the study area (typical of Sonoran Desert Uplands) than in many other North American desert areas that have <20 cm/yr of precipitation (Brown 1994). Monsen et al (2004) suggested that revegetation through seeding is difficult to achieve when precipitation averages <20 cm but did not provide lower limits for outplants, which are more frequently irrigated. The roadside environment also could have influenced results.…”

Section: Discussionmentioning

confidence: 98%

Revegetating Disturbance in National Parks: Reestablishing Native Plants in Saguaro National Park, Sonoran Desert

Abella¹,

O’Brien

Weesner

2015

Natural Areas Journal

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“…This suggests a major reason for hand planting could have been to accommodate for complex natural terrain. The use of aircraft by some respondents could have been to seed quickly over complex landforms, including steep slopes (Dorner ; Monsen et al ; Madsen et al ). However, as stated by some of the respondents of this survey, aerial seeding can be an inefficient use of seeds because wind is unpredictable and can result in inaccurate seed distribution and a lack of soil cover.…”

Section: Discussionmentioning

confidence: 99%

“…While purpose‐built seeding machines that can handle some problematic native seeds do exist (Hardegree et al ), the inability of some seeds to flow, coupled with failed germination (Corr ; Alizadeh & Minaei ), limits the number of species that can be effectively direct seeded. Another challenge associated with the use of direct seeding machinery is the limited capacity to sow seeds in complex, heterogeneous topographies (Monsen et al ; Madsen et al ). Such topography is common in the mining sector, e.g.…”

Section: Introductionmentioning

confidence: 99%

Factoring restoration practitioner perceptions into future design of mechanical direct seeders for native seeds

Masarei

Guzzomi

Merritt

et al. 2019

Restoration Ecology

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The methods used to distribute seeds influence the success of a restoration project. We surveyed 183 restoration practitioners from across the globe with the aim of identifying common limitations to the effective use of mechanical direct seeding in large‐scale restoration practice to highlight avenues for design improvement to mechanized seeding equipment. Results from this survey show that direct seeding methods are commonly used for ecological restoration and agree with other studies that suggest the method can achieve results much quicker and cheaper than the alternative of distributing nursery‐grown tube stock. However, this study indicates that current mechanical direct seeding methods lack adequate control of seed sowing depth and spatial distribution and highlight that the inability to sow seeds of varying morphology over complex topography are common limitations to direct seeding. To improve restoration success, engineering improvements to mechanical direct seeders used in large‐scale restoration should focus in particular on addressing issues of precision of delivery for diverse seed types and landscapes.

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Restoring Western Ranges and Wildlands, vol. 2

Cited by 42 publications

References 0 publications

Seed germination and dormancy traits of forbs and shrubs important for restoration of North American dryland ecosystems

Seed germination and dormancy traits of forbs and shrubs important for restoration of North American dryland ecosystems

Revegetating Disturbance in National Parks: Reestablishing Native Plants in Saguaro National Park, Sonoran Desert

Factoring restoration practitioner perceptions into future design of mechanical direct seeders for native seeds

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