Quercus calliprinos regrowth advantage under grazing in Mediterranean maquis and its management implications

Agra, Har’el; Ne’eman, Gidi

doi:10.1016/j.foreco.2010.09.044

Cited by 8 publications

(6 citation statements)

References 26 publications

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“…; Bar Massada et al. ; Agra & Ne'eman ; Dias et al. ), our findings highlight the differences in annual rates of natural regeneration and in the long‐term dynamics of vegetative response.…”

Section: Discussionsupporting

confidence: 55%

“…While the differential impacts of disturbances on woody vegetation at any single point in time are well known from previous studies (e.g. Sal et al 1999;Bar Massada et al 2008;Agra & Ne'eman 2011;Dias et al 2016), our findings highlight the differences in annual rates of natural regeneration and in the long-term dynamics of vegetative response. As such, they have clear implications for planning disturbance-based management regimes in Mediterranean landscapes.…”

Section: Treatment Effects On Woody Vegetationsupporting

confidence: 57%

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Regeneration dynamics of woody vegetation in a Mediterranean landscape under different disturbance‐based management treatments

Bashan

Bar‐Massada

2016

Applied Vegetation Science

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Question Mediterranean landscapes have been affected for millennia by agro‐pastoral disturbances such as grazing and vegetation clearing. Increased levels of fine‐scale habitat heterogeneity that resulted from these disturbances contribute to reduced wildfire risk and increased species diversity. Disturbance‐based management tools utilize disturbances in order to promote biodiversity and reduce fire risk, but are complicated to apply effectively due to the natural regeneration ability of many woody species following disturbances. Therefore, their successful application requires a better understanding of woody regeneration dynamics. Here, we asked how disturbance‐based management treatments affected the spatiotemporal dynamics of woody vegetation across 11 yrs in a Mediterranean landscape. Location Ramat HaNadiv LTER, northern Israel. Methods We analysed vegetation dynamics in a field experiment comprising five treatments: cattle grazing, goat grazing, shrub clearing, shrub clearing followed by goat grazing and undisturbed control. We used image analysis of high‐resolution aerial photographs to map woody patches in our study plots. We then quantified the spatial pattern of woody vegetation using multiple landscape indices, and conducted a comparative analysis of woody regeneration rates under different management treatments. Results Cattle grazing did not inhibit woody regeneration, as regeneration rates were similar to those found in undisturbed control plots. Shrub clearing led to rapid woody regeneration (7% yr−1), while a combination of shrub clearing and intense goat grazing halted woody regeneration completely. Finally, intense goat grazing not only prevented woody regeneration but led to significant decline in woody cover (1% yr−1). Conclusions Our results highlight the rapid regenerative response of woody vegetation to severe disturbances, and the growth rates we found can serve as guidelines for long‐term management regimes aimed at maintaining low woody cover and biomass in fuel breaks and buffer zones.

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Section: Discussionsupporting

confidence: 55%

Section: Treatment Effects On Woody Vegetationsupporting

confidence: 57%

Regeneration dynamics of woody vegetation in a Mediterranean landscape under different disturbance‐based management treatments

Bashan

Bar‐Massada

2016

Applied Vegetation Science

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“…Finally, previous research has revealed inter‐specific differences in oak seedling recruitment depending on their plant traits and life history (Agra & Ne'eman, ; Naveh & Carmel, ), with lower recruitment levels for deciduous (e.g. Q. lobata , Q. douglasii ) than evergreen oaks (e.g.…”

Section: Introductionmentioning

confidence: 93%

Spatio‐temporal variation of biotic and abiotic stress agents determines seedling survival in assisted oak regeneration

López‐Sánchez

Peláez

Dirzo

et al. 2019

Journal of Applied Ecology

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1. Mediterranean oak woodlands are currently undergoing considerable anthropogenic changes that globally threaten their long-term persistence. Restoration efforts via assisted regeneration depend on species traits and type of stress.However, how different sources of stress vary across space (microsites) and time (intra-and inter-annual variation) for co-occurring oak species remains largely unknown.2. We examined spatio-temporal variation of biotic (herbivory, seed predation) and abiotic (drought) stress agents to evaluate seedling survival across different regeneration microsites, and considering two climatically contrasting years. We used two co-occurring species of contrasting ecology and leaf traits in California oak woodlands: the deciduous Quercus lobata (valley oak) and the evergreen Q. agrifolia (coast live oak).3. Most oak seedlings (98.8%) suffered from some type of stress. For both species, summer drought was the main cause of mortality, followed by rodent damage, ungulate browsing and insect damage. Rodents represented the predominant biotic stress, as all rodent-affected seedlings eventually died. Interactions among stress factors were nuanced: insect and ungulate-browsing stresses were greater during dry year, whereas rodent damage was similar in dry and average years. Intra-annually, rodent damage was the main stress agent in early spring, whereas water stress and ungulate-browsing were greater from late spring to early fall. Plant species traits were also determinant: overall, the evergreen species had greater survival probability than the deciduous one. 4. Across microsites, water stress showed higher occurrence in open grassland habitats, while rodent damage was prevalent under palatable shrubs and ungulate browsing under conspecific trees. Shrub and tree cover reduced damage attributed to water stress but increased rodent and ungulate damage, respectively. Interestingly, lower water stress but higher rodent damage was found further inside the shrub cover. 5. Synthesis and applications. Intra-and inter-annual variation are critical determinants of stress type and intensity on oak recruitment. Spatial variation (microsite K E Y W O R D S deer browsing, leaf economic spectrum, Mediterranean oak woodlands, plant facilitation, regeneration niche, rodent, ungulates, water stress | 2665 Journal of Applied Ecology LÓPEZ-SÁNCHEZ Et aL.

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“…Surprisingly, there is a dearth of information for Mediterranean systems (but see Sternberg et al, 2000 andGordon et al, 1990) where, paradoxically, grazing is a major ecological and evolutionary driving force (Perevolotsky and Seligman, 1998). In the Mediterranean region, many plant species have evolved life history traits adapted to grazing, including high re-sprouting capability of shrub species or summer dormancy of mainly annual herb species (Agra and Ne'eman, 2011;Naveh and Carmel, 2003).…”

Section: Introductionmentioning

confidence: 99%

Establishing grazing and grazing-excluded patches increases plant and invertebrate diversity in a Mediterranean oak woodland

Bugalho

Lecomte

Gonçalves

et al. 2011

Forest Ecology and Management

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Quercus calliprinos regrowth advantage under grazing in Mediterranean maquis and its management implications

Cited by 8 publications

References 26 publications

Regeneration dynamics of woody vegetation in a Mediterranean landscape under different disturbance‐based management treatments

Regeneration dynamics of woody vegetation in a Mediterranean landscape under different disturbance‐based management treatments

Spatio‐temporal variation of biotic and abiotic stress agents determines seedling survival in assisted oak regeneration

Establishing grazing and grazing-excluded patches increases plant and invertebrate diversity in a Mediterranean oak woodland

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