Differential roles of seed and sprout regeneration in forest diversity and productivity after disturbance  

作　　者：Marek Mejstrík Martin Svatek Martina Pollastrini Martin Sramek Radim Matula 

机构地区：[1]Department of Forest Ecology,Faculty of Forestry and Wood Sciences,Czech University of Life Sciences Prague,Kamýcka 129,16500,Prague,Czech Republic [2]Department of Forest Botany,Dendrology and Geobiocoenology,Faculty of Forestry and Wood Technology,Mendel University in Brno,Zemedelska 3,61300,Brno,Czech Republic [3]Department of Agriculture,Food,Environment and Forestry,University of Firenze,Piazzale Delle Cascine 28,50144,Firenze,Italy

出　　处：《Forest Ecosystems》2024年第3期371-380,共10页森林生态系统（英文版）

基　　金：supported by an Internal Grant Agency CULS project No.A_21_06;by the grant INTER-TRANSFER LTT20017 provided by the Ministry of Education,Youth and Sports of the Czech Republic.

摘　　要：Natural regeneration after disturbances is a key phase of forest development,which determines the trajectory of successional changes in tree species composition and diversity.Regenerating trees can originate from either seeds or sprouts produced by disturbed trees with sprouting ability.Although both regeneration strategies often develop and co-occur after a disturbance,they tend to affect forest development differently due to significant functional differences.However,the origin of tree regeneration is rarely distinguished in post-disturbance forest surveys and ecological studies,and the differential roles of seed and sprout regeneration in forest productivity and diversity remain poorly understood.To address these research gaps,we explored the role of sprout and seed regeneration in the formation of woody species diversity and above-ground biomass(AGB)productivity in early-stage forest development.Data were collected in two experimental forest stands in the Czech Republic,where trees were cut with varying intensities with the density of residual(uncut)trees ranging from 0 to 275 trees per hectare.All trees were mapped and their sizes were measured before cutting and then,either as a stump with sprouts or a residual tree,remeasured 11 years later.In addition,all tree saplings were mapped and measured 11 years after logging,and their origin(sprout or seed)was identified.To assess abundances and productivity,we estimated AGB of all2,685 sprouting stumps of 19 woody species and 504 generative(i.e.,seed origin)individuals of 16 woody species,using allometric equations.Mixed-effects models were used to analyze the effects of each regeneration strategy on woody species diversity and the total AGB under varying densities of residual trees.Nonmetric multidimensional scaling was used to evaluate the effect of regeneration strategies on species composition.AGB and diversity of sprouts were significantly higher than those of seed regeneration.Sprouts formed on average97.1%of the total regeneration AGB in H ady and 98.6%in

关 键 词：RESPROUTING SEEDING Residual trees Tree diversity Above-ground biomass 

分 类 号：S718.5[农业科学—林学]