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Country roads as barriers to rodent-mediated seed dispersal in a warm-temperate forest: implications for forest fragmentation
European Journal of Forest Research ( IF 2.8 ) Pub Date : 2021-01-03 , DOI: 10.1007/s10342-020-01345-w Hongyu Niu , Chao Peng , Zhiwen Chen , Zhiyong Wang , Hongmao Zhang
European Journal of Forest Research ( IF 2.8 ) Pub Date : 2021-01-03 , DOI: 10.1007/s10342-020-01345-w Hongyu Niu , Chao Peng , Zhiwen Chen , Zhiyong Wang , Hongmao Zhang
Ecological effects of country roads have been largely ignored due to their remoteness and presumed light disturbance. In order to examine the effects of country roads on seed dispersal by rodents, rodent community, seed predation, and dispersal were compared between the roadside and the forest interior (road-seed station distance: less than 10 m, 30–50 m, more than 50 m). A total of 3240 wild apricot ( Armeniaca sibirica ) seeds were tracked in three 2.0 ha plots in 2014 (a seed-poor year) and 2016 (a seed-rich year), along a lightly disturbed country paved road (21.2 km length, 7.0 m wide, two-way, constructed in 2008) across the forests in the west of Beijing city. The results showed that there were more farmland rodent species, but fewer forest-shrub rodent species near the roadside compared to within the forest interior. During seed dispersal, fewer seeds were harvested, scatter-hoarded or moved toward the road, but seeds were moved longer distances near the roadside than those within the forest interior. Some seeds could be dispersed more than 20 m, but none of them crossed the road. These results suggest that the focal road has changed the rodent community and rodent-mediated seed dispersal dynamics. Compared in seed-poor year (2014), seed harvest and dispersal were reduced, while seed predation increased in seed-rich year (2016), suggesting that the negative effects caused by the road would be more obvious in seed-rich years. Our results imply that ecological-based assessment and management of country roads is also important although they are located in remote areas and have little disturbance in terms of traffic and people.
更新日期：2021-01-03
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