Soil seed banks in Pinus ponderosa forests in Arizona: Clues to site history and restoration potential

Korb, Julie E.; Springer, Judith D.; Powers, Stephanie R.; Moore, Margaret M.

doi:10.1658/1402-2001(2005)008[0103:ssbipp]2.0.co;2

Cited by 26 publications

(26 citation statements)

References 52 publications

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“…Our results showing forbs as the dominant seed bankers agrees with other recent seed bank studies [37,38] yet the forbs appear to be maintained in the seed bank and do not reach the aboveground as found in other disturbed sites [37]. Forbs seemd to be driving the difference in overall seed densities among forest types (Figure 2).…”

Section: Seed Bankssupporting

confidence: 92%

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 Bankssupporting

confidence: 92%

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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“…On the other hand, Scleria sp., the most important species in the standing vegetation had a frequence of only 13% in the seed bank. This lack of correspondence has been found numerous times (Korb et al 2005, Sakai et al 2005, Hopfensperger 2007, Lang & Halpern 2007, Zobel et al 2007, Bossuyt & Honnay 2008 and has been attributed to biological differences among species (seed viabilidad and/or likelihood to be predated) or to methodology (germination technique, time of sampling, number or volume of soil samples) which may limit quantification of the soil seed bank (Brown 1992, Malo 2000, Csontos 2007). …”

Section: Discussionmentioning

confidence: 99%

“…Seed bank composition was determined with the seedling emergence method (Korb et al 2005). in January 2008, 15 sampling points were selected at random along a transect in a representative area of the plantation.…”

Section: Methodsmentioning

confidence: 99%

Soil seed bank and the effect of needle litter layer on seedling emergence in a tropical pine plantation

Bueno¹,

Baruch²

2010

RBT

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Abstract:The soil seed bank is the basis for community establishment and permanence and plays a primary role in natural restoration of degraded or altered ecosystems. As part of a restoration project, this study aimed to quantify the soil seed bank and to evaluate the effect of the needle litter layer on seedling emergence. Soil samples from a pine plantation were collected at random in the field and set to germinate in a greenhouse. Half of them were covered by a 6cm layer of dead pine needles simulating field conditions. in the field, 20x20cm plots were established, half were left intact and half were cleaned from the litter needles. All four treatments had 15 replicates and seedling emergence was recorded during six months. Soil seed bank density was 1 222/m 2 from 17 morphotypes. in the field, the number of morphotypes and seedlings was only 9% and 6% respectively, of those emerged in the greenhouse, possibly due to watering and lack of predation in the latter. in both cases, herbs and graminoids were the dominant emerging seedlings, making up to 70-90% of the total. The needle layer didn't prevent seeds from reaching the soil but strongly reduced (>50%) seedling emergence, although high variability within treatments resulted in no statistically significant differences. These results show that the needle layer hinders germination and/or emergence of seedlings from the seed bank. its removal may be a recommended technique to accelerate natural restoration in pine plantations. Rev. Biol. Trop. 59 (3): 1071-1079. Epub 2011 September 01.

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“…Knowledge of these seed bank characteristics could be used to predict which exotic species could become management concerns or for deciding whether to seed native species based on their abundance in seed banks (Glass 1989). Although on-or off-site seed dispersal from existing vegetation is also important (Wienk and others 2004), several studies have found partial correlations between seed bank composition and species colonizing sites after disturbance (Korb andothers 2005, Springer andHastings 2004).…”

Section: Introductionmentioning

confidence: 99%

Estimating soil seed bank characteristics in ponderosa pine forests using vegetation and forest-floor data

Abella¹,

Springer²

2008

Self Cite

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Abstract-Soil seed banks are important for vegetation management because they contain propagules of species that may be considered desirable or undesirable for site colonization after management and disturbance events. Knowledge of seed bank size and composition before planning management activities facilitates proactive management by providing early alerts of exotic species presence and of abilities of seed banks to promote colonization by desirable species. We developed models in ponderosa pine (Pinus ponderosa) forests in northern Arizona to estimate the size and richness of mineral soil seed banks using readily observable vegetation and forestfloor characteristics. Regression models using three or fewer predictors explained 41 to 59 percent of the variance in 0-to 2-inch (0-to 5-cm) seed densities of total and native perennial seed banks. Key predictors included aboveground plant species richness/10.8 ft 2 (1 m 2 ), litter weight and thickness, and tree canopy type (open or closed). Both total and native perennial seed banks were larger and richer in plots containing: (1) species-rich understories, (2) sparse litter, and (3) tree canopy openings. A regression tree model estimated that seed bank density of native perennials is 14-fold greater if aboveground plant richness exceeds eight species/10.8 ft 2 , forest-floor leaf litter is < 1 inch (2.5 cm) thick, and tree canopies are open.

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Soil seed banks in Pinus ponderosa forests in Arizona: Clues to site history and restoration potential

Cited by 26 publications

References 52 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

Soil seed bank and the effect of needle litter layer on seedling emergence in a tropical pine plantation

Estimating soil seed bank characteristics in ponderosa pine forests using vegetation and forest-floor data

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