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Article

Light Transmissivity of Tree Shelters Interacts with Site Environment and Species Ecophysiology to Determine Outplanting Performance in Mediterranean Climates

1
Escuela Técnica Superior de Ingeniería de Montes, Forestal y del Medio Natural, Universidad Politécnica de Madrid, Calle José Antonio Novais 10, Apdo, 28040 Madrid, Spain
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Fundación Centro de Estudios Ambientales del Mediterráneo, Universidad de Alicante, Apdo, 03080 Alicante, Spain
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Department of Botany and Plant Ecology and Physiology, Facultad de Farmacia, Universidad de La Laguna, Avda, Astrofísico Sánchez s/n, Apdo, 456, ES-38200 San Cristóbal de La Laguna, Spain
*
Author to whom correspondence should be addressed.
Academic Editors: Jeremiah R. Pinto, Diane L. Haase and Owen T. Burney
Land 2021, 10(7), 753; https://doi.org/10.3390/land10070753
Received: 15 June 2021 / Revised: 11 July 2021 / Accepted: 15 July 2021 / Published: 19 July 2021
(This article belongs to the Special Issue Forest Landscape Restoration: Strategies, Challenges, and Impacts)
Plastic tree shelters are commonly used in plantations under Mediterranean climates to protect against herbivory and enhance outplanting performance. However, effects on outplanting performance cannot be generalized due to the complexity of plant responses to microenvironmental conditions within the tube wall. The interactions between the light transmissivity of the tubes and species-specific responses to light and site environment on two-year outplanting performance were studied in two species with contrasting shade tolerance planted inside tree shelters with four different light transmissivities and a non-tree shelter control at two Mediterranean sites with contrasting rainfall and temperature. In general, increasing light transmissivity enhanced biomass accumulation, suggesting that the use of clear tubes might be advisable. However, the shade-tolerant Q. ilex did not benefit from the greater light transmissivity in the most arid site, indicating that the positive effect of clear tubes depends on water stress experienced by seedlings, which ultimately is determined by drought resistance strategies and site conditions. The growth of both species and survival of P. halepensis were higher within clear tubes in the continental site than in unsheltered plants, which suggests that factors other than light, such as warmer daytime temperatures or the prevention of dust deposition, can explain this beneficial site-dependent effect of tree shelters. In conclusion, our results confirm the hypothesis that the effect of tree shelter and its light transmission on outplanting performance is site and species-specific, but further research is needed to identify the effect of other effects not related to light transmission. View Full-Text
Keywords: forest restoration; forestation; Mediterranean climate; tree shelters; transplanting performance; Pinus halepensis; Quercus ilex; water potential; root growth forest restoration; forestation; Mediterranean climate; tree shelters; transplanting performance; Pinus halepensis; Quercus ilex; water potential; root growth
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MDPI and ACS Style

Oliet, J.A.; Puértolas, J.; Valenzuela, P.; Vázquez de Castro, A. Light Transmissivity of Tree Shelters Interacts with Site Environment and Species Ecophysiology to Determine Outplanting Performance in Mediterranean Climates. Land 2021, 10, 753. https://doi.org/10.3390/land10070753

AMA Style

Oliet JA, Puértolas J, Valenzuela P, Vázquez de Castro A. Light Transmissivity of Tree Shelters Interacts with Site Environment and Species Ecophysiology to Determine Outplanting Performance in Mediterranean Climates. Land. 2021; 10(7):753. https://doi.org/10.3390/land10070753

Chicago/Turabian Style

Oliet, Juan A., Jaime Puértolas, Patricio Valenzuela, and Alberto Vázquez de Castro. 2021. "Light Transmissivity of Tree Shelters Interacts with Site Environment and Species Ecophysiology to Determine Outplanting Performance in Mediterranean Climates" Land 10, no. 7: 753. https://doi.org/10.3390/land10070753

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