Impacts des cervidés sur le taux de survie des souches et la croissance des rejets de chêne sessile

Abstract : Deer populations have significantly increased since the establishment of hunting plans in the 1980s and because of the increase in forest area in France. In order to ensure sustainable management and to reach a balance between deer population densities an their environment, it is important to have a better understanding of the damages they cause. I took advantage of two thinning campaigns carried out within the OPTMix experiment (in 2013 and 2014) to try to understand the impact of deer browsing on the resprouting capacity of sessile oak stumps under continuous forest cover. Fenced and unfenced plots were used to quantify the effect of deer on the resprouts of sessile oak. Measures of survival and growth were carried out in 2015 and 2016. The survival was studied at the stump scale (314 stumps): the mixture composition had the lowest survival rate. The growth was analysed on 634 sessile oak sprouts, for which an increase in length was observed that was four times higher under pine trees than under oak trees. Futhermore the comparison of deer browsing in the three types of stands showed a better survival rate of the stumps and increased sprout growth in fenced plots compared to unfenced plots. This study confirms the negative impact by deer on the sessile oak resprouting capacity.
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Master thesis
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Kamel Zouaydi. Impacts des cervidés sur le taux de survie des souches et la croissance des rejets de chêne sessile. Sciences de l'environnement. 2016. ⟨hal-01767341⟩

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