Impacts of Non-native Trees: Basic and Applied Aspects

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Forest Ecology and Management".

Deadline for manuscript submissions: closed (30 November 2019)

Special Issue Editor


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Guest Editor
Department of Life Sciences, University of Alcalá, Ctra. Madrid-Barcelona km 33.6, 28805 Alcalá de Henares, Madrid, Spain
Interests: biological invasions; ecosystem processes; vegetation structure and function; plant–soil interactions; ecosystem services

Special Issue Information

Dear Colleagues,

Non-native trees have been widely planted worldwide to provide a wide variety of ecosystem services, ranging from natural resources (e.g., timber, tannins, or cork) to amenities or ornamental values. However, some of these species may have undesired effects in the introduced ecosystems (e.g., reduction of local biodiversity, alteration of ecosystem processes, changes in the community structure). Moreover, some of these impacts may involve important economic losses (e.g., those associated with reduced water reserves) or direct harms on people (e.g., production of allergenic pollen or increased fire risk). Although impacts are often associated with invasive species, some of them may appear at low densities (i.e. when the non-native species is not yet considered as invasive). Predicting impacts by non-native trees is challenged by the strong context-dependency of impacts, by the scarce information on the impact–abundance relations, by the biased selection of a few high-impact trees for scientific studies, or by the time lags that may hide the invasive potential.

We encourage studies from different fields, providing empirical information on the impacts of non-native trees on the structure and function of ecosystems or their components, as well as on ecosystem services. We also encourage studies contributing to improved risk assessment and the efficient management of non-native trees. Original studies and reviews are both welcome.

Prof. Dr. Pilar Castro-Díez
Guest Editor

Manuscript Submission Information

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Keywords

  • non-native trees
  • community structure
  • ecosystem processes
  • biodiversity
  • ecosystem services
  • fire risk
  • time lags
  • per-capita impact
  • invasion gradients

Published Papers (1 paper)

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Research

30 pages, 2619 KiB  
Article
Comparison of Natural Regeneration in Natural Grassland and Pine Plantations across an Elevational Gradient in the Páramo Ecosystem of Southern Ecuador
by Carlos Quiroz Dahik, Franklin Marín, Ruth Arias, Patricio Crespo, Michael Weber and Ximena Palomeque
Forests 2019, 10(9), 745; https://doi.org/10.3390/f10090745 - 29 Aug 2019
Cited by 8 | Viewed by 2823
Abstract
During the 1980s, reforestation programs using exotic species (Pinus spp.) were established in the páramo ecosystem of Ecuador. The aims of this study were: (1) to compare the natural regeneration between pine plantations (Pi) and natural grassland (NG) across an elevational gradient [...] Read more.
During the 1980s, reforestation programs using exotic species (Pinus spp.) were established in the páramo ecosystem of Ecuador. The aims of this study were: (1) to compare the natural regeneration between pine plantations (Pi) and natural grassland (NG) across an elevational gradient and (2) to identify the attributes of Pi and soil properties that were influencing herbaceous and woody plant composition and their plant cover. In total, six independent Pinus patula (Schltdl. & Cham. plantations (two per each elevation) were selected and distributed in an elevational range (3200–3400, 3400–3600, 3600–3800 m a.s.l.). Adjacent to Pi, plots in NG were established for recording natural regeneration. Both, namely the attributes and the soil samples, were measured in Pi. The results showed that natural regeneration differs significantly between both types of vegetation. As expected, NG holds more plant diversity than Pi; the elevational range showed a clear tendency that there was more herbaceous richness when elevation range increases, while the opposite was found for woody species. Moreover, attributes of Pi influenced herbaceous and woody vegetation, when saturated hydraulic conductivity (Ksat) in the soil, basal area (BA) and canopy density (CD) increased, herbaceous species richness and its cover decreseased; and when Ksat and the acidity in the soil increased, woody plants richness and its cover decreased. The plantations have facilitated the establishment of shade tolerant species. More studies are needed to evaluate if removal with adequate management of pine plantations can improve the restoration and conservation of the native vegetation of the páramo ecosystem. Full article
(This article belongs to the Special Issue Impacts of Non-native Trees: Basic and Applied Aspects)
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