Does the shelterwood method to regenerate oak forests affect acorn production and predation?

Bellocq, M. Isabel; Jones, Chuck; Dey, Daniel C.; Turgeon, Jean

doi:10.1016/j.foreco.2004.10.013

Cited by 29 publications

(25 citation statements)

References 26 publications

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“…Aussenac (1957in Poleno and Vacek 2009) reports 8 full and 11 partial seed years in surroundings of Nancy, France over 106 years during 1865-1971 periods. Different and irregular fructification periodicity was also confirmed for other oak species both in Europe and in North America (Shaw 1968;Koenig et al 1994;Bellocq et al 2005).…”

Section: Introductionsupporting

confidence: 55%

“…At the same time, a crop over 10/m 2 was recorded by the authors below the closed canopy conditions three times during the studied period, and six times in the open. By contrast, Bellocq et al (2005) observed inconclusive differences in the production of red oak acorns on the control plot and on the plot with a 50% canopy reduction. Nevertheless, the crop was evaluated immediately after the implemented measure when the corresponding response of tree fructification could not yet be expected.…”

Section: Discussionmentioning

confidence: 80%

“…Seed-tree or shelterwood methods have been studied in North America for the northern red oak (Bellocq et al 2005;Dey 1995;Dey et al 2009). The positive influence of such tending focused on the release of oak crowns has been emphasized as the basic prerequisite for higher acorn productivity.…”

Section: Introductionmentioning

confidence: 99%

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Section: Introductionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 80%

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Tree growing space and acorn production of Quercus robur

2013

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“…However, little is known about post-dispersal seed predation in Spanish black pine natural forest ecosystems. Changes in general patterns of post-dispersal seed predation are expected since the predation of these groups of animals may be very variable depending on seed production (Castro et al, 1999;Du et al, 2007), site characteristics (Hulme, 1997;Holt et al, 1995;Ostfeld et al, 1997;Christianini and Galetti, 2007) and forest stand conditions (Hulme, 1998;Bellocq et al, 2005;Christianini and Galetti, 2007;Pérez-Ramos and Marañon, 2008). Seed predation can also depend on masting.…”

Section: Introductionmentioning

confidence: 99%

“…Stand density affect microenvironment conditions such as surface soil temperature, soil moisture and atmospheric conditions (Dey and MacDonald, 2001), which may influence seed predators development and abundance, and thus post-dispersal seed predation (Bellocq et al, 2005). For example, Hulme (1998) found that ants foraged primarily in open microhabitats whereas rodents were least active in open microhabitats.…”

Section: Introductionmentioning

confidence: 99%

Modelling Spanish black pine postdispersal seed predation in Central-eastern Spain

Lucas‐Borja¹,

Silva-Santos²,

Fonseca

et al. 2010

For. syst.

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In this research work, we specifically address post-dispersal Spanish black pine (Pinus nigra Arn. ssp salzmannii) seed predation at two different locations, one being the most common and representative location for the species and the other located on areas at their ecological limit of distribution in Cuenca Mountain (Spain). A modelling approach was employed to analyze the effect of stand and site characteristics and climate variables on the post-dispersal predation process. Each predator group (ants, rodents and birds) was evaluated by excluding the other two with different experimental devices. Our study demonstrates that the percent of removal was related with the seed rain patterns being lower in the high seed rain year of 2006 (mean ± se 11.15 ± 3.7% of removed seeds) than in the low seed rain years of 2005 and 2007 (81.71 ± 6.0% and 87.29 ± 6.6% of removed seeds respectively). In high seed production years, birds were the most important predators and rodents were the less important predator group in both Los Palancares y Agregados and Ensanche de Las Majadas. No conclusion can be obtained in low seed production years due to the high seed removal percentage by all predator groups. Experimental site and overstory density were no significant with respect to seed predation. Modelling approach show that the seed removal percentage is influenced by seed production year (MastY) a temporal effect within the year, measured by the day variable (Day) and a climatic variable (accumulated averaged maximum air temperatures 20 days before survey date, AaMAT). Further developments include the construction of stochastic models to predict the effects of climate-related variables or microhabitat characteristics on seed losses, contributing to reduce uncertainty in post-dispersal Spanish black pine seed predation dynamics and to provide credible tools to decision-makers and forest managers.Key words: mast year; post-dispersal seed predation; Pinus nigra; Mediterranean region. Resumen Modelización de predación post-dispersión de semillas de pino laricio en el Centro-este de EspañaEl presente trabajo de investigación se centra en la predación post-dispersión acontecida en dos áreas forestales, una localizada en la zona de distribución característica del pino laricio (Pinus nigra Arn ssp salzmannii) y otra en su límite ecológico de distribución dentro de la Serranía de Cuenca (España). El efecto que sobre la predación post-dispersión tienen la densidad arbórea, diferentes variables climáticas y varias características de cada masa forestal fue evaluado mediante la creación de diferentes modelos. Cada grupo de predadores (hormigas, ratones y pájaros) fue analizado por exclusión de los otros dos mediante diferentes dispositivos experimentales. Nuestro estudio demuestra que el porcentaje de semilla predada estuvo relacionado con la lluvia de semillas, siendo menor en 2006, año de abundante producción (media ± estandar error: 11.15 ± 3.7% de semillas predadas) que en 2005 y 2007, años de escasa producción de semilla (81.71 ...

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Past and present disturbances generate spatial variation in seed predation

Bartel

Orrock

2020

Ecosphere

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Seed survival is a key process for plant populations; variation in the activity and abundance of animals that consume seeds can lead to dramatic shifts in seed fate. Because granivores may respond to contemporary disturbance as well as to enduring changes in habitats caused by past disturbances, understanding seed fate requires studies capable of evaluating how past and present disturbances modify granivore communities, foraging activity, and ultimately, seed predation. Historic agricultural land use and contemporary canopy harvesting are widespread disturbances that could generate large-scale patterns of seed fate by modifying environmental characteristics that determine granivore identity and behavior. To evaluate whether land-use history and canopy harvesting affect seed-animal interactions, we conducted an experiment distributed across 80,000 ha of longleaf pine woodlands that coupled large-scale canopy harvesting at seven 4-ha sites containing both post-agricultural land use and nonagricultural land use in South Carolina, United States. We deployed a total of 28,000 nail-tagged seeds and recovered the tags to quantify seed fate. Past agricultural land use and contemporary canopy harvesting interacted to affect the rate of seed predation. Seed predation rates in harvested sites depended on land-use history: Seed predation was 30% lower in post-agricultural plots than in nonagricultural plots. This interaction was driven by the differential effect of land-use history and canopy harvesting on rodent activity. Camera traps revealed that Sigmodon hispidus only foraged in harvested plots and was most active in nonagricultural plots. In harvested plots, seed removal increased with S. hispidus activity. In unharvested plots, seed removal increased with Sciurus niger activity, but S. niger was not affected by land-use history. In finding that land-use history and canopy harvesting determine the outcomes of seed-animal interactions, we show that understanding patterns of seed predation is contingent upon the interplay of disturbances in both the distant past and recent past. These results suggest that patterns of past land use and present land use may help reconcile the considerable variation in seed fate observed in ecological communities.

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Does the shelterwood method to regenerate oak forests affect acorn production and predation?

Cited by 29 publications

References 26 publications

Tree growing space and acorn production of Quercus robur

Tree growing space and acorn production of Quercus robur

Modelling Spanish black pine postdispersal seed predation in Central-eastern Spain

Past and present disturbances generate spatial variation in seed predation

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