Overabundant ungulates in French Sologne? Increasing red deer and wild boar pressure may not threaten woodland birds in mature forest stands

Baltzinger, Marie; Mårell, Anders; Archaux, Frédéric; Pérot, Thomas; Leterme, Franck; Deconchat, Marc

doi:10.1016/j.baae.2016.04.005

Cited by 15 publications

(10 citation statements)

References 42 publications

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“…km −2 (range = 0.46-0.55: Richard et al, 2010), 0.96 ind. km −2 (0.69-1.23: Garel et al, 2010;Baltzinger et al, 2016), and 6.46 ind. km −2 (5-7.92: Lang et al, 2000;Baltzinger et al, 2016), respectively.…”

Section: Metric One: the Dispersal Potential (Dp)mentioning

confidence: 99%

“…km −2 (0.69-1.23: Garel et al, 2010;Baltzinger et al, 2016), and 6.46 ind. km −2 (5-7.92: Lang et al, 2000;Baltzinger et al, 2016), respectively. Taking the mean seed recovery rates, and vector species density values, the DP of the dispersers can be ranked as: S. scrofa > C. elaphus > C. capreolus (DP scores: 284.89; 12.58; 2.86).…”

Section: Metric One: the Dispersal Potential (Dp)mentioning

confidence: 99%

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Driver's Seat: Understanding Divergent Zoochorous Dispersal of Propagules

et al. 2019

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The functional role, relative importance, and the spatial and temporal parameters of different vector species, which underpin the passive dispersal (zoochory) of organisms (or their propagules), are frequently poorly understood. Accordingly, a conceptual framework capable of providing a rigorous and unified assessment for the dispersal capacity of vector species is required. Here, we propose and apply a series of novel metrics, the Dispersal Potential (DP), the Relative Dispersal Potential (RDP), and the Combined Dispersal Potential (CDP), to predict and classify likely dispersal and vector importance. In essence, DP = Np × Tv, whereby Np is the per capita propagule load (e.g., mean, minimum, or maximum abundance) or species richness of propagules carried per individual vector species, while Tv is the total number of possible vectors (e.g., individuals of a single species at a source site, local scale abundances, or entire continental populations). Further, the ratio based metric RDP allows for DP comparison between species, while the CDP accumulates the DP of a variety of vector species. An additional Relative CDP (RCDP) metric facilitates comparison between the CDP for multiple vectors to that of one or more additional vectors. The proposed metrics can also be used to assess intraspecific differences (e.g., ontogeny). Accordingly, we examine a variety of case studies and present calculations to ascertain the usefulness of our proposed metrics. Overall, the metrics can be used to quantify and rank the prominence of different dispersers that facilitate biological connectivity. Finally, we argue that adoption of these metrics and variants thereof, will provide a more realistic measure of species' functional roles than examination of interaction intensities alone, which will enhance understanding of zoochory within and across dispersal networks.

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Section: Metric One: the Dispersal Potential (Dp)mentioning

confidence: 99%

Section: Metric One: the Dispersal Potential (Dp)mentioning

confidence: 99%

Driver's Seat: Understanding Divergent Zoochorous Dispersal of Propagules

et al. 2019

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“…Increasing ungulate populations are an issue for forest managers since the damages they may cause to trees and seedlings can jeopardize forest regeneration processes (Bradshaw & Waller, 2016). Many studies have been carried out under high densities of ungulate populations (Habeck & Schultz, 2015) obtained either experimentally (Bachand et al, 2014) or naturally (Martin, Stockton, Allombert, & Gaston, 2010), or resulting from local management choices (Baltzinger et al, 2016), or in areas where noticeable impacts had been a priori observed (Boulanger et al, 2015). The roles of ungulates as general drivers of changes in forest dynamics and biodiversity have been less investigated in standard conditions.…”

Section: Introductionmentioning

confidence: 99%

Ungulates increase forest plant species richness to the benefit of non‐forest specialists

Boulanger

Dupouey

Archaux

et al. 2017

Global Change Biology

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Large wild ungulates are a major biotic factor shaping plant communities. They influence species abundance and occurrence directly by herbivory and plant dispersal, or indirectly by modifying plant-plant interactions and through soil disturbance. In forest ecosystems, researchers' attention has been mainly focused on deer overabundance. Far less is known about the effects on understory plant dynamics and diversity of wild ungulates where their abundance is maintained at lower levels to mitigate impacts on tree regeneration. We used vegetation data collected over 10 years on 82 pairs of exclosure (excluding ungulates) and control plots located in a nation-wide forest monitoring network (Renecofor). We report the effects of ungulate exclusion on (i) plant species richness and ecological characteristics, (ii) and cover percentage of herbaceous and shrub layers. We also analyzed the response of these variables along gradients of ungulate abundance, based on hunting statistics, for wild boar (Sus scrofa), red deer (Cervus elaphus) and roe deer (Capreolus capreolus). Outside the exclosures, forest ungulates maintained higher species richness in the herbaceous layer (+15%), while the shrub layer was 17% less rich, and the plant communities became more light-demanding. Inside the exclosures, shrub cover increased, often to the benefit of bramble (Rubus fruticosus agg.). Ungulates tend to favour ruderal, hemerobic, epizoochorous and non-forest species. Among plots, the magnitude of vegetation changes was proportional to deer abundance. We conclude that ungulates, through the control of the shrub layer, indirectly increase herbaceous plant species richness by increasing light reaching the ground. However, this increase is detrimental to the peculiarity of forest plant communities and contributes to a landscape-level biotic homogenization. Even at population density levels considered to be harmless for overall plant species richness, ungulates remain a conservation issue for plant community composition.

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“…23 Cook-Patton et al 2014. 24 Baltzinger et al 2016;Cocquelet et al 2019. 25 Merceron et al 2004;Felton et al 2018.…”

Section: Faktori Kas Nosaka Briežu Dzimtas Dzīvnieku Barošanās Paradmentioning

confidence: 99%

Briežu dzimtas populācijas dinamika – izaicinājums kvalitatīvu mežaudžu atjaunošanā Latvijā

Celma¹,

Silava²,

Dūmiņš³

et al. 2019

ADZ

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Celma, Mg. biol., ir Latvijas Valsts mežzinātnes institūta (LVMI) Silava vides inženiere. Raksts ir viņas ar izcilību aizstāvētā maģistra darba kopsavilkums. Maģistra darba empīriskais materiāls ievākts, LVMI Silava īstenojot Meža atjaunošanas, ieaudzēšanas un kopšanas pētījumu programmu, darbs aizstāvēts Latvijas Universitātes Bioloģijas fakultātē. Jānis Ozoliņš, Dr. biol., LVMI Silava medniecības un faunas menedžmenta pētniecības grupas vadošais pētnieks un šī maģistra darba vadītājs. Kārlis Dūmiņš, Mg. biol., ir autores kolēģis, LVMI Silava Meža atjaunošanas un ieaudzēšanas pētniecības grupas asistents un mežzinātnes doktorantūras students Latvijas Lauksaimniecības universitātē. Raksturvārdi: briežu dzimtas dzīvnieki, apkodumi, jaunaudzes. Ievads Latvijā savvaļā sastopamas trīs briežu dzimtas dzīvnieku sugas: alnis Alces alces L., stirna Capreolus capreolus L. un staltbriedis Cervus elaphus L. Šo dzīvnieku skaits ir stabili pieaudzis, un attiecīgi 2018./2019. gadā, pēc Valsts meža dienesta datiem, Latvijas teritorijā dzīvoja 23 000 aļņu, 158 000 stirnu un 57 000 staltbriežu 1 . Tā kā šo dzīvnieku populācija pieaug, ir paredzama to palielināta ietekme uz apkārtējo ainavu un ekosistēmu, tas izriet no briežu dzimtas dzīvnieku barošanās paradumiem 2 . Dzīvnieku barošanās ieradumus ietekmē tādi faktori kā biotopu daudzveidība, barības pieejamība, īpatņu blīvums, 1 Valsts meža dienests 2019. 2 Andersone-Lilly et al. 2010.

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Overabundant ungulates in French Sologne? Increasing red deer and wild boar pressure may not threaten woodland birds in mature forest stands

Cited by 15 publications

References 42 publications

Driver's Seat: Understanding Divergent Zoochorous Dispersal of Propagules

Driver's Seat: Understanding Divergent Zoochorous Dispersal of Propagules

Ungulates increase forest plant species richness to the benefit of non‐forest specialists

Briežu dzimtas populācijas dinamika – izaicinājums kvalitatīvu mežaudžu atjaunošanā Latvijā

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