Effects of Epixylic Vegetation Removal on the Dynamics of the Microbial Community Composition in Decaying Logs in an Alpine Forest

Abstract

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Methodology matters for comparing coarse wood and bark decay rates across tree species

“…Another possible reason for the rather weak coupling between bark and wood mass loss may be that bark becomes detached as decay advances, but this process can probably be suppressed when the log is rapidly buried by litter, soil or ground vegetation after tree fall. In one of our study sites (Flevoland), some logs gradually became strongly overgrown by moss after one year of decomposition, which could have strongly affected the interaction between decomposition of bark and wood interaction (Chang et al, 2019). Furthermore, wood with low density (i.e.…”

Tissue type and location within forest together regulate decay trajectories of Abies faxoniana logs at early and mid-decay stage

“…Wood and bark samples extracted from the disk were immediately stored in separate sealed bags for trait analyses and area measurement (Materials and Methods 2.3). Between the two harvests, we also collected disks four times one year to monitor seasonal dynamics of microbial community, carbon and nutrient cycles because the decomposing process in natural and under disturbance are both highly season-specific in high-frigid forest ecosystem (Chang et al, 2017;Chang et al, 2019). To estimate the measured effects (i.e.…”

“…Thus, the logs used for sawing disks were randomly selected and marked at T 0 , and then undergone subsequent sequential sampling. For more details see (Chang et al, 2019).…”

Changes in plant debris and carbon stocks across a subalpine forest successional series

“…Subalpine forest communities at different successional stages are observed in the subalpine forest region on the eastern Qinghai-Tibet Plateau due to long-term natural disturbance and the commercial logging of natural forests since the 1950s (Yang et al 1992). Although the WD stock from the gap center to the closed canopy in an over-mature subalpine coniferous forest (Xiao et al 2016), the water storage potential of WD (Wang et al 2016), and the changes in microbial biomass and epixylic plant diversity with decay classes (Wang et al 2017;Chang et al 2019) have been widely investigated in this region, little attention has been given to the changes in the composition, biomass stock and carbon storage of plant debris with forest succession. Therefore, we hypothesized that (1) plant debris stocks would increase from the earlier successional stage to the later succession stage in the subalpine forest region, (2) the stocks and proportions of different decay and diameter classes should differ at different successional stages, and (3) the C stock of plant debris would increase across the forest succession.…”