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During the 2020 COVID-19 pandemic, countries around the globe have implemented a certain degree of lockdown, restricting citizens' freedom of movement and freedom of assembly. This article aims to illustrate the impact that the measures against the spread of COVID-19 have on forest recreation, building on a study in an urban context around Bonn (Germany) that was conducted between April 2019 and February 2020. The quantitative and qualitative data on urban forest visits from that study were supplemented with new census data supported by selected expert interviews. We found that visitor numbers since the inception of COVID-19 measures in March 2020 have more than doubled. Visitor patterns have drastically shifted, from an even distribution throughout the day with small peaks before and after office hours to a culmination in the late afternoon. Lastly, the interviewed forestry professionals have noted that a new set of visitors, i.e. young people, families with children and non-locals, has arrived to the forest. This influx of more and novice visitors poses challenges for forest managers and urban forest policy. It is, however, also a unique opportunity for a substantial engagement of forestry with society at large, that has implications for forest policy, especially in urban areas, possibly beyond the COVID-19 pandemic era., Highlights • Census data have shown a significant increase in forest visits during the COVID-19 lockdown in Bonn, Germany. • The new census data complete a long-running research on urban forest recreation and visitor preferences • The forest appears as a prime spot for recreation, due to its intrinsic characteristics as well as a lack of alternatives • Qualitative and quantitative data show a need for additional investments in order to accommodate a diverse public

Adaptation to different ecological environments can, through divergent selection, generate phenotypic and genetic differences between populations, and eventually give rise to new species. The fire salamander (Salamandra salamandra) has been proposed to represent an early stage of ecological speciation, driven by differential habitat adaptation through the deposition and development of larvae in streams versus ponds in the Kottenforst near Bonn (Germany). We set out to test this hypothesis of ecological speciation in an area different from the one where it was raised and we took the opportunity to explore for drivers of genetic differentiation at a landscape scale. A survey over 640 localities demonstrated the species’ presence in ponds and streams across forests, hilly terrain and areas with hedgerows (‘bocage’). Genetic variation at 14 microsatellite loci across 41 localities in and around two small deciduous forests showed that salamander effective population sizes were higher in forests than in the bocage, with panmixia in the forests (Fst Fst > 0.025). The system fits the ‘mainland-island’ metapopulation model rather than indicating adaptive genetic divergence in pond versus stream larval habitats. A reanalysis of the Kottenforst data indicated that microsatellite genetic variation fitted a geographical rather than an environmental axis, with a sharp transition from a western pond-breeding to an eastern, more frequently stream-breeding group of populations. A parallel changeover in mitochondrial DNA exists but remains to be well documented. The data support the existence of a hybrid zone following secondary contact of differentiated lineages, more so than speciation in situ.