RT info:eu-repo/semantics/article
T1 The differential influences of human-induced disturbances on tree regeneration community: a landscape approach
A1 Zamorano Elgueta, Carlos
A1 Cayuela Delgado, Luis
A1 Rey Benayas, José María
A1 Donoso, Pablo
A1 Geneletti, Davide
A1 Hobbs, Richard J.
K1 Cattle grazing
K1 Chile
K1 Community composition
K1 Forest successional stages
K1 Land tenure
K1 Low-intensity disturbance
K1 'Predict first, assemble later' modeling
K1 Selective logging
K1 Temperate forest
K1 Ciencia
K1 Medio Ambiente
K1 Science
K1 Environmental science
AB Understanding the processes shaping biological communities under interacting disturbances isa core challenge in ecology. Although the impacts of human-induced disturbances on forest ecosystems havebeen extensively studied, less attention has been paid to understanding how tree regeneration at thecommunity level responds to such disturbances. Moreover, these previous studies have not considered howthese effects change according to major social and environmental factors that can influence forest use at alandscape scale. In this study, we investigate the effects of cattle grazing and selective logging on thecomposition of tree regeneration communities in relation to forest successional stage and land tenure regimein Chilean temperate forests, a global biodiversity hotspot. We recorded seedlings, saplings and basal area ofstumps of tree species (as a surrogate for selective logging), and number of cattle dung pats (as a surrogatefor cattle pressure) in 129 25 3 20 m plots in small (,200 ha) and large properties in different successionalstages (old-growth, intermediate, secondary forests). The regeneration of the ten more abundant species aspredicted by human disturbance, land tenure, forest successional stage, and number of parent trees wasmodelled using generalised linear models. Predictions for each individual model were made under differentscenarios of human disturbance. The predicted regeneration results were assembled and subjected toordination analyses and permutation multivariate analyses of variance to determine differences inregeneration composition under each scenario. In most cases, best-fit models contained at least one of theexplanatory variables accounting for human disturbance. The effects of selective logging on tree regenerationvaried depending on land tenure regime, but cattle grazing always exhibited a negative effect. Our resultsrevealed that cattle have a more negative effect on forest regeneration than selective logging, especially inold-growth forests and small properties. Our analytical approach contributes to the understanding of thedifferential influence of human-induced disturbances on the tree regeneration community at a landscapescale. It can inform conservation policies and actions, which should focus on addressing themain disturbancefactors and on developing strategies to conserve the most sensitive species to such disturbances.
PB Ecological Society of America
SN 2150-8925
YR 2014
FD 2014
LK http://hdl.handle.net/10017/21454
UL http://hdl.handle.net/10017/21454
LA eng
NO C. Zamorano-Elgueta was supported by a CON-ICYT pre-doctoral fellowship (Government of Chile),the European Comission (Project contract DCI-ENV/2010/222-412), the Chilean NGO Forest Engineers forNative Forest (Forestales por el Bosque Nativo, www.bosquenativo.cl) and project REMEDINAL-2 (Comu-nidad de Madrid, S2009/AMB-1783). L. Cayuela wassupported by project REMEDINAL-2. This work ispart of the objectives of projects CGL2010-18312(CICYT, Ministerio de Economı́a y Competividad deEspana). The authors acknowledge the valuablesupport of Vero ́nica Pı́riz, Cony Becerra, RodrigoGangas, Oscar Concha, Eduardo Neira and staff fromthe Valdivian Coastal Reserve, as well as the NationalForest Service of Chile (Corporación Nacional Forestal)
DS MINDS@UW
RD 16-abr-2024