Patterns of shrub diversity and tree regeneration across topographic and stand-structural gradients in a Mediterranean forest

  • Pedro Tíscar Oliver Centro de Capacitación y Experimentación Forestal. Cazorla (Jaén).

Abstract

Aim of study: This study aimed to determine the influence of topography and stand-structure on the characteristics of shrub communities and tree regeneration in a Mediterranean forest.

Area of study: The Navahondona forest in Cazorla mountain range (SE Spain).

Material and Methods: Data from 298 inventory plots were analysed by means of Generalized Linear Models (GLM) to test the effects of aspect, altitude and stand basal area on shrub cover and diversity. Likewise, the effects of these three factors plus shrub cover on the recruitment of Spanish black pine (Pinus nigra spp. salzmannii) and two oak species (Quercus ilex and Q. faginea) were analysed by GLMs. Additionally, the influence of topography and forest structure on the specific distribution of shrub species was analysed with multivariate methods.

Main results: Shrub cover and diversity were generally low and did not change across the topographic gradient. Tree density was the only study variable affecting (negatively) shrub cover. However, shrub composition changed with aspect and altitude. Both pine and oak regeneration benefited from partial tree cover at intermediate values of stand density, but only oak regeneration was facilitated by shrubs.

Research highlights: Altitude, aspect and stand basal area influence the characteristics of shrub communities and tree regeneration. Proactive management of dense pinewoods might be needed to increase shrub and tree diversity.

Key words Pinus nigra; Quercus sp.; altitude; aspect; facilitation; Shannon diversity index. 

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References

References

Baraza E, Zamora R, Hódar JA, 2006. Conditional outcomes in plant/herbivore interactions: neighbours matter. Oikos 113, 148-156. http://dx.doi.org/10.1111/j.0030-1299.2006.14265.x

Blanco E, Casado MA, Costa M, Escribano R, García M, Génova M, et al., 1998. Los bosques ibéricos. Una interpretación geobotánica. – Editorial Planeta S.A., Barcelona, Spain. 598 pp.

Casermeiro MA, Molina JA, de la Cruz MT, Hernando J, Hernando M I, Moreno PS, 2004. Influence of scrubs on runoff and sediment loss in soils of Mediterranean climate. Catena 57, 91-107. http://dx.doi.org/10.1016/S0341-8162(03)00160-7

Castro J, Zamora R, Hódar JA, Gómez JM, 2004. Seedling establishment of a boreal tree species (Pinus sylvestris) at its southernmost distribution limit: Consequences of being in a marginal Mediterranean habitat. J Ecol 92, 266–277. http://dx.doi.org/10.1111/j.0022-0477.2004.00870.x

Castro J, Zamora R, Hódar, JA, Gómez JM, 2005. Alleviation of summer drought boosts establishment success of Pinus sylvestris in a Mediterranean mountain: An experimental approach. Plant Ecol 181, 191–202. http://dx.doi.org/10.1007/s11258-005-6626-5

Coll L, González-Olabarria JR, Mola-Yudego B, Pukkala T, Messier C, 2011. Predicting understory maximum shrubs cover using altitude and overstory basal area in different Mediterranean forests. Eur J Forest Res 130, 55-65. http://dx.doi.org/10.1007/s10342-010-0395-y

Coll M, Peñuelas J, Ninyerola M, Pons X, Carnicer J, 2013. Multivariate effect gradients driving forest demographic responses in the Iberian Peninsula. Forest Ecol Manag 303, 195-209. http://dx.doi.org/10.1016/j.foreco.2013.04.010

Crawley MJ, 2013. The R book. John Wiley & Sons Ltd., UK.

Decocq G, Aubert M, Dupont F, Alard D, Saguez R, Bardat J, 2004. Plant diversity in a managed temperate deciduous forest: understorey response to two silvicultural systems. J Appl Ecol 41, 1065-1079. http://dx.doi.org/10.1111/j.0021-8901.2004.00960.x

De la Montana E, Rey-Benayas JM, Carrascal LM, 2006. Response of bird communities to silvicultural thinning of Mediterranean maquis. J Appl Ecol 43, 651-659. http://dx.doi.org/10.1111/j.1365-2664.2006.01171.x

Ehrlén J, Eriksson O, 2000. Dispersal limitation and patch occupancy in forest herbs. Ecology 81, 1667-1674. http://dx.doi.org/10.1890/0012-9658(2000)081[1667:DLAPOI]2.0.CO;2

Fernández-Olalla M, Muñoz-Olalla M, Muñoz-Igualada J, Martínez-Jauregui M, Rodríguez-Vigal C, San Miguel-Ayanz A, 2006. Selección de especies y efecto del ciervo (Cervus elaphus L.) sobre arbustedos y matorrales de los Montes de Toledo, España central. Invest Agrar: Sist Recur For 15, 329-338.

Franklin JF, 1988. Structural and functional diversity in temperate forests. In: Biodiversity (Wilson EO, ed.). National Academy Press, Washington D.C., USA. pp. 166-175.

García-González R, Cuartas P, 1989. A comparison of the diets of the wild goat (Capra pyrenaica), domestic goat (Capra hircus), mouflon (Ovis musimon) and domestic sheep (Ovis aries) in Cazorla mountain range. Acta Biol Montana 9, 123-132.

Gómez JM, 2003. Spatial patterns in long‐distance dispersal of Quercus ilex acorns by jays in a heterogeneous landscape. Ecography 26, 573-584. http://dx.doi.org/10.1034/j.1600-0587.2003.03586.x

Gómez JM, Puerta-Piñero C, Schupp EW, 2007. Effectiveness of rodents as local seed dispersers of Holm oaks. Oecologia 155, 529-537. http://dx.doi.org/10.1007/s00442-007-0928-3

Gómez-Aparicio L, Zamora R, Gómez JM, Hódar JA, Castro J, Baraza E, 2004. Applying plant facilitation to forest restoration: A meta-analysis of the use of shrubs as nurse plants. Ecol Appl 14, 1128–1238. http://dx.doi.org/10.1890/03-5084

Gómez-Aparicio L, Zavala MA, Bonet FJ, Zamora R, 2009. Are Pine plantations valid tools for restoring Mediterranean forests? An assessment along abiotic and biotic gradients. Ecol Appl 19, 2124-2141. http://dx.doi.org/10.1890/08-1656.1

Gómez-Mercado F, 2011. Vegetación y flora de la Sierra de Cazorla. (Spain). Guineana 17.

Gracia M, Montané F, Piqué J, Retana J, 2007. Overstory structure and topographic gradients determining diversity and abundance of understory shrub species in temperate forests in central Pyrenees (NE Spain). Forest Ecol Manag 242, 391-397. http://dx.doi.org/10.1016/j.foreco.2007.01.056

Herrera CM, 1989. Pollinator abundance, morphology, and flower visitation rate: analysis of the "quantity" component in a plant-pollinator system. Oecologia 80, 241-248. http://dx.doi.org/10.1007/BF00380158

Herrera CM, 1984a. A study of avian frugivores, bird-dispersed plants, and their interaction in Mediterranean shrublands. Ecol Monogr 54, 1-23. http://dx.doi.org/10.2307/1942454

Herrera CM, 1984b. Selective pressures on fruit seediness: differential predation of fly larvae on fruits of Berberis hispanica. Oikos 42, 166-170. http://dx.doi.org/10.2307/3544789

Herrera CM, 2000. Individual differences in progeny viability in Lavandula latifolia: a long-term field study. Ecology 81, 3036-3047. http://dx.doi.org/10.1890/0012-9658(2000)081[3036:IDIPVI]2.0.CO;2

Herrera CM, 2002. Topsoil properties and seedling recruitment in Lavandula latifolia: stage‐dependence and spatial decoupling of influential parameters. Oikos 97, 260-270. http://dx.doi.org/10.1034/j.1600-0706.2002.970212.x

Hunter ML, 1999. Biological diversity. In: Maintaining biodiversity in forest ecosystems. Hunter ML Jr (ed.). Cambridge University Press (UK). pp. 3-21. http://dx.doi.org/10.1017/CBO9780511613029.003

Linares JC, Tíscar PA, 2010. Climate change impacts and vulnerability of the southern populations of Pinus nigra subsp. salzmannii. Tree Physiol 30, 795–806. http://dx.doi.org/10.1093/treephys/tpq052

Linares JC, Tíscar PA, 2011. Buffered climate change effects in a Mediterranean pine species: range limit implications from a tree-ring study. Oecologia 167, 847-859. http://dx.doi.org/10.1007/s00442-011-2012-2

Lookingbill TR, Zavala MA, 2000. Spatial pattern of Quercus ilex and Quercus pubescens recruitment in Pinus halepensis dominated woodlands. J Veg Sci 11, 607-612. http://dx.doi.org/10.2307/3246590

Magurran AE, 1988. Ecological diversity and its measurement. Chapman and Hall, London, UK. 179 pp. http://dx.doi.org/10.1007/978-94-015-7358-0

Martí R, del Moral JC (coord.), 2004. Atlas de las aves reproductoras de España. Organismo Autónomo de Parques Nacionales y Sociedad Española de Ornitología. (Spain).

McKenzie D, Halpern CB, Nelson CR, 2000. Overstory influences on herb and shrub communities in mature forests of western Washington, USA. Can J Forest Res 30, 1655-1666. http://dx.doi.org/10.1139/x00-091

Médail F, Quézel P, 1999. Biodiversity hotspots in the Mediterranean Basin: setting global conservation priorities. Conserv biol 13, 1510-1513. http://dx.doi.org/10.1046/j.1523-1739.1999.98467.x

Mendoza I, Zamora R, Castro JA, 2009a. A seeding experiment for testing tree-community recruitment under variable environments: Implications for forest regeneration and conservation in Mediterranean habitats. Biol Conserv 149, 1491–1499. http://dx.doi.org/10.1016/j.biocon.2009.02.018

Mendoza I, Gómez‐Aparicio L, Zamora R, Matías L, 2009b. Recruitment limitation of forest communities in a degraded Mediterranean landscape. J Veg Sci 20, 367-376. http://dx.doi.org/10.1111/j.1654-1103.2009.05705.x

Oksanen J, Blanchet FG, Kindt R, Legendre P, O'Hara RG, Simpson GL, Solymos P, Henry M, Stevens H, Wagner H, 2010. Vegan: community ecology package. R-package.

Puerta-Piñero C, Gómez JM, Valladares F, 2007. Irradiance and oak seedling survival and growth in a heterogeneous environment. Forest Ecol Manag 242, 462-469. http://dx.doi.org/10.1016/j.foreco.2007.01.079

Pugnaire FI, Luque MT, Armas C, Gutiérrez L. 2006. Colonization processes in semi-arid Mediterranean old-fields. J Arid Environ 65, 591-603. http://dx.doi.org/10.1016/j.jaridenv.2005.10.002

Ruiz de la Torre J, 1979. Árboles y arbustos de la Espa-a peninsular. Escuela Técnica Superior de Ingenieros de Montes, Sección de Publicaciones (Spain). 512 pp.

Ruiz-Benito P, Gómez-Aparicio L, Zavala MA, 2012. Large-scale assessment of regeneration and diversity in Mediterranean planted pine forests along ecological gradients. Divers Distrib 18, 1092-1106. http://dx.doi.org/10.1111/j.1472-4642.2012.00901.x

Serrada R, Montero G, Reque JA (eds), 2008. Compendio de Selvicultura Aplicada en España. INIA. Madrid, Spain.

Siles G, Rey PJ, Alcántara JM, Ramírez JM, 2008. Assessing the long-term contribution of nurse plants to restoration of Mediterranean forests through Markovian models. J Appl Ecol 45, 1790-1798. http://dx.doi.org/10.1111/j.1365-2664.2008.01574.x

Soriguer RC, Fandos P, Granados JE, Castillo A, Serrano E, 2003. Herbivoría por ungulados silvestres en el piso mesomediterráneo de las Sierras de Cazorla, Segura y Las Villas. In "In memoriam" al profesor Dr. Isidoro Ruiz Martínez (pp. 479-504). Universidad de Jaén, Spain.

Tíscar PA, Linares JC, 2011. Structure and regeneration patterns of Pinus nigra ssp. salzmannii natural forests: A basic knowledge for adaptive management in a changing climate. Forests 4, 1013–1030. http://dx.doi.org/10.3390/f2041013

Tíscar PA, Linares JC, 2013. Large-scale regeneration patterns of Pinus nigra subsp. salzmannii: poor evidence of increasing facilitation across a drought gradient. Forests 5, 1-20. http://dx.doi.org/10.3390/f5010001

Tíscar PA, Lucas-Borja ME, Candel-Pérez D, 2011. Changes in the structure and composition of two Pinus nigra subsp. salzmannii forests over a century of different silvicultural treatments. Forest Syst. 3, 525-535. http://dx.doi.org/10.5424/fs/20112003-11481

Tíscar PA, 2004. Estructura, regeneración y crecimiento de Pinus nigra en el Área de Reserva Navahondona-Guadahornillos (Sierra de Cazorla, Jaén). Doctoral thesis. Universidad Politécnica, Madrid, Spain.

Tíscar PA, 2014. Distribution patterns of oaks in a pinewood from Sierra de Cazorla (SE Spain) after 90 years of forest management. Ecosistemas 23, 116-123.

Valladares F, Zaragoza-Castells J, Sánchez-Gómez D, Matesanz S, Alonso B, Portsmuth A, 2008. Is shade beneficial for Mediterranean shrubs experiencing periods of extreme drought and late-winter frosts? Ann Bot 102, 923–933. http://dx.doi.org/10.1093/aob/mcn182

Xiong S, Nilsson C, 1999. The effects of plant litter on vegetation: a meta-analysis. J Ecol 87, 984-994. http://dx.doi.org/10.1046/j.1365-2745.1999.00414.x

Zamora R, Hódar JA, Matías L, Mendoza I, 2010. Positive adjacency effects mediated by seed disperser birds in pine plantations. Ecol Appl 20, 1053–1060. http://dx.doi.org/10.1890/09-0055.1

Published
2015-06-12
How to Cite
Tíscar Oliver, P. (2015). Patterns of shrub diversity and tree regeneration across topographic and stand-structural gradients in a Mediterranean forest. Forest Systems, 24(1), e011. https://doi.org/10.5424/fs/2015241-05887
Section
Research Articles