Pine plantation bands limit seedling recruitment of a perennial grass under semiarid conditions |
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| Authors: | J.A. Navarro-Cano G.G. Barberá A. Ruiz-Navarro V.M. Castillo |
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| Affiliation: | 1. The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, 84990, Israel;2. Department of Natural Resources, Agricultural Research Organization, Gilat Research Center, Israel;3. Department of Geography and Environmental Development, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel;4. Department of Bioresource Engineering, McGill University, Macdonald Campus 21, 111 Lakeshore Road, Ste-Anne-de-Bellevue, Quebec H9X 3V9, Canada;5. Institute for Dryland Environmental Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, 84990, Israel;6. The Dead Sea and Arava Science Center, Tamar Regional Council, Israel;1. Department of Plant Physiology and Development, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland;2. Department of Polar Research and Documentation, Institute of Botany, Faculty of Biology and Earth Sciences, Jagiellonian University, Kopernika 27, 31-501 Krakow, Poland;1. Instituto de Investigación de Zonas Desérticas, Universidad Autónoma de San Luis Potosí, Altair 200, Fracc. del Llano, San Luis Potosí, S.L.P. 78377, Mexico;2. Insituto Potosino de Investigación Científica y Tecnológica, División de Ciencias Ambientales, Camino a la Presa San José 2055, Lomas 4ta Sección, San Luis Potosí, S.L.P. 78216, Mexico;3. Universidad Rey Juan Carlos, Departamento de Biología y Geología, Escuela Superior de Ciencias Experimentales y Tecnología, C/ Tulipán, s/n, Móstoles 28933, Spain;1. Direction Régionale des Eaux et Forêts et de la Lutte Contre la Désertification du Rif, Avenue Mohamed V, BP 722, 93000 Tétouan, Morocco;2. University of Alicante, Department of Ecology and IMEM, Ap. 99, 03080 Alicante, Spain;1. INIA-CIFOR, Departamento de Ecología y Genética Forestal, Carretera de la Coruña Km 7.5, 28040, Madrid, Spain;2. Unidad Mixta de Genómica y Ecofisiología Forestal, INIA/UPM, Madrid, Spain;3. INIA-CIFOR, Departamento de Industrias Forestales, Carretera de La Coruña Km 7.5, 28040, Madrid, Spain;4. Metabolon, Inc. 617 Davis Drive, Suite 400, Durham, 27713, NC, USA;1. Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Science and Technology, Guangzhou, 510650, China;2. National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangzhou 510650, China;3. School of Geography and Planning, Sun Yat-sen University, Guangzhou, 510275, China;4. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, 830011, China |
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| Abstract: | Pine plantations coexist with Stipa tenacissima grasslands in many semiarid western Mediterranean areas. We compared three microsites created by a 30-year-old Pinus halepensis plantation: below pine plantation line (BP), below canopy of pines (BC) and interline bare band (BA). They were evaluated in terms of soil properties, pine litter and suitability as recruitment niches for S. tenacissima. Next, in a manipulative experiment in growth chambers we tested the hypothesis that pine litter interferes with the seedling emergence of S. tenacissima. Three treatments in pots were compared: (a) soil from BA; (b) intact soil + litter from BP; and (c) soil + litter from BP, which was mixed in the laboratory (BPMX). In the field the main microsite differences were pine cover and litter cover and thickness. Seedling emergence was significantly greater in BA than in BP. Emergence and litter depth fits a linear regression model. In the growth chamber litter did not interfere with the emergence of S. tenacissima. However, seedlings grown without litter were 28% longer and their mass was 27% greater than in the litter treatments. The detected pine litter interference may be relevant for plant dynamics and might be considered in forestry management programs. |
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