Understory response to management treatments in northern Arizona ponderosa pine forests

Griffis, Kerry L.; Crawford, Julie; Wagner, Michael R.; Moir, William H.

doi:10.1016/s0378-1127(00)00461-8

Cited by 155 publications

(141 citation statements)

References 17 publications

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“…Grasses, often colonize forest openings, as fuel thinning treatments are designed to thin the canopy and consequently, the understory receives increased light. This increase of grasses, whether invasive or native, in fuel treatments has been documented in a variety of thinning treatments [16,40,41], which suggests that many of the graminoids found in the seed bank were likely deposited after the mastication treatment. Even with the highly variable densities observed across the forest types this study displayed comparable seed densities to seed bank studies conducted in similar ecosystems [42][43][44][45].…”

Section: Seed Banksmentioning

confidence: 77%

Impacts of Mastication: Soil Seed Bank Responses to a Forest Thinning Treatment in Three Colorado (USA) Conifer Forest Types

Faist

Stone

Tripp

2015

Forests

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Mastication is a forest fuel thinning treatment that involves chipping or shredding small trees and shrubs and depositing the material across the forest floor. By decreasing forest density mastication has been shown to lessen crown fire hazard, yet other impacts have only recently started to be studied. Our study evaluates how mastication treatments alter the density and composition of soil seed banks in three Colorado conifer forest types. The three forest types were (1) lodgepole pine, (2) ponderosa pine and (3) pinyon pine-juniper. Results showed that masticated sites contained higher seed bank densities than untreated sites: a pattern primarily driven by treatment effects in ponderosa pine forests. The seed bank was dominated by forbs regardless of forest type or treatment. This pattern of forb dominance was not observed in the aboveground vegetation cover as it demonstrated more even proportions of the functional groups. Graminoids showed a higher seed density in treated sites than untreated and, similarly, the identified non-native species only occurred in the treated ponderosa pine sites suggesting a potential belowground invasion for this forest type. These results suggest that presence of masticated material might not be creating a physical barrier hindering the transfer of seeds as predicted. OPEN ACCESSForests 2015, 6 3061

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Section: Seed Banksmentioning

confidence: 77%

Impacts of Mastication: Soil Seed Bank Responses to a Forest Thinning Treatment in Three Colorado (USA) Conifer Forest Types

Faist

Stone

Tripp

2015

Forests

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“…In P. ponderosa Dougl. (ponderosa pine) forest perennial grass cover decreased and invasive species increased as fire intensity and litter consumption increased (Armour et al 1984;Griffis et al 2001;Bataineh et al 2006;Sabo et al 2009). …”

Section: Herbaceous and Ground Cover Responsementioning

confidence: 99%

Sagebrush steppe recovery after fire varies by development phase of Juniperus occidentalis woodland

Bates

Sharp

Davies

2014

Int. J. Wildland Fire

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Abstract. Woodland ecosystems of the world have been changed by land use demands, altered fire regimes, invasive species and climate change. Reduced fire frequency is recognised as a main causative agent for Pinus-Juniperus L.(piñon-juniper) expansion in North American woodlands. Piñon-juniper control measures, including prescribed fire, are increasingly employed to restore sagebrush steppe communities. We compared vegetation recovery following prescribed fire on Phase 2 (mid-succession) and Phase 3 (late-succession) Juniperus occidentalis Hook. (western juniper) woodlands in Oregon. The herbaceous layer on Phase 2 sites was comprised of native perennial and annual vegetation before and after fire. On Phase 3 sites the herbaceous layer shifted from native species to dominance by invasive Bromus tectorum L. (cheatgrass). After fire, shrubs on Phase 2 sites were comprised of sprouting species and Ceanothus velutinus Dougl. (snowbrush). On Phase 3 woodland sites the shrub layer was dominated by C. velutinus. The results suggest that Phase 2 sites have a greater likelihood of recovery to native vegetation after fire and indicate that sites transitioning from Phase 2 to Phase 3 woodlands cross a recovery threshold where there is a greater potential for invasive weeds, rather than native vegetation, to dominate after fire.

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“…Increases in light and nutrient availability from thinning facilitates the development of dense herbaceous understory vegetation (Griffis et al 2001) and improved vertical structure following thinning increases bird diversity and habitat use (Bisson and Stutchbury 2000, King and DeGraaf 2000). However, potential changes in forest floor habitat condition from thinning did not negatively influence the use of sensitive indicator species (salamander) (Messere and Ducey 1998) and thinning may increase the abundance of particular wildlife species (Sullivan and Klenner 2000).…”

Section: Stand-scale Considerationsmentioning

confidence: 99%

Negative or positive effects of plantation and intensive forestry on biodiversity: A matter of scale and perspective

Hartmann

Daoust²,

Bigué³

et al. 2010

The Forestry Chronicle

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Terrestrial biodiversity is closely linked to forest ecosystems but anthropogenic reductions in forest cover and changes in forest structure and composition jeopardize their biodiversity. Several forest species are threatened because of reduced habitat quality and fragmentation or even habitat loss as a result of forest management activities. In response to this threat, integrated forest management (IFM) was developed in the early 1990s and has been applied over large spatial scales ever since. While IFM seeks to satisfy both human resource demands and ecosystem integrity, the whole forest matrix is affected and this may also have negative impacts on biodiversity. The concept of forest zoning (e.g., Triad) avoids these issues by physically separating land uses from each other. The zoning approach has been developed in the same period as IFM, but there are still very few examples of large-scale applications. This may be because its distinctiveness from IFM may not always seem clear and because forest zoning is not easily implemented. Here we explain these differences and show that IFM and the zoning approach are indeed different management paradigms. We advocate the use of high-yield plantations within the zoning paradigm as a means for biodiversity conservation and review the literature (with an emphasis on the northern hemisphere and on plantation forestry within a land-zoning approach) on impacts of forest management activities on biodiversity. Furthermore, we give advice on issues that require consideration when implementing forest zoning at both the stand and the landscape levels. We recommend several small changes in design and management of forest plantations as a means to significantly increase their biodiversity value. We conclude that while forest zoning seems an adequate strategy for the Canadian forestry sector, a shift in paradigm must carry over to policy-makers and legislation if this approach is to succeed.Key words: biodiversity, landbase zoning, forest management, intensive silviculture, plantation forests RÉSUMÉ La biodiversité terrestre est étroitement liée aux écosystèmes forestiers, mais la réduction du couvert forestier par des activités humaines et des changements dans la structure et la composition forestière constituent une menace pour la biodiversité. Plusieurs espèces forestières sont menacées par la dégradation, la fragmentation ou même la perte totale de leur habitat occasionnées par l'aménagement forestier. Pour y remédier, l'aménagement intégré des ressources forestières (AIRF) a été développé et appliqué à grande échelle depuis le début des années 1990. Quoique l' AIRF vise à la fois à satisfaire la demande de produits et services forestiers et à protéger l'intégrité des écosystèmes forestiers, cette approche engendre une pénétration presque totale de la matrice forestière et pose ainsi des risques pour la biodiversité. Par contre, le zonage forestier (ex. Triade) vise à réduire la pénétration du territoire forestier par une séparation spatiale des objectifs d'aménagement....

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Understory response to management treatments in northern Arizona ponderosa pine forests

Cited by 155 publications

References 17 publications

Impacts of Mastication: Soil Seed Bank Responses to a Forest Thinning Treatment in Three Colorado (USA) Conifer Forest Types

Impacts of Mastication: Soil Seed Bank Responses to a Forest Thinning Treatment in Three Colorado (USA) Conifer Forest Types

Sagebrush steppe recovery after fire varies by development phase of Juniperus occidentalis woodland

Negative or positive effects of plantation and intensive forestry on biodiversity: A matter of scale and perspective

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