Biodiversity and Conservation

, Volume 21, Issue 11, pp 2949–2965 | Cite as

Dendroecological analysis of relict pine forests in the centre of the Iberian Peninsula

  • Mar GénovaEmail author
  • Pablo Moya
Original Paper


Pinus nigra subsp. salzmannii is found in the east and centre of the Iberian Peninsula, in the south of France and in North Africa. This subspecies occupies the westernmost position of the species’ general range. The persistence on the Iberian Peninsula of very long-lived specimens of Pinus nigra subsp. salzmannii, along with their sensitivity to climate, has drawn the attention of many researchers, but to date the importance of dendroecological studies relating to conservation of biodiversity or the genetic resources of this taxon had not been stressed. In the present paper we use dendroecological methods to analyse the relict pine forest in Navalacruz, an interesting and endangered genetic forestry resource on the northern slopes of the Gredos mountains (in Spain’s Central System Range) at the subspecies’ south-western global limit. This forest provides a prime example for demonstrating the potential application of dendroecology for studying the origin, dynamics, local variability, relationships with climate and anthropogenic disturbances of relict forest populations. We dated 93 growth sequences from 47 trees ranging from 1809 to 2006 and we have determined that interspecific competition is the most relevant factor as regards differences in the diameter growth of these trees. Moreover, we detected great variability and numerous common growth disturbances unrelated to climatic oscillations. These quasi-periodic disturbances alternate between suppression and release suggesting continuous management cycles of different intensities. Despite its high level of disturbance, the pine forest presents a certain degree of climatic sensitivity. Comparing with others Pinus nigra subsp. salzmannii populations, we denoted a temporal grading of the growth response to precipitation that is indicative of differences in the start and length of the vegetative period. Furthermore, we compiled different dendroecological and palaeobiogeographical data to demonstrate that this dense, homogeneous and relatively younger P. nigra population is of an indigenous nature. This study aims to provide data for improved management and conservation of this exceptional and highly endangered bastion of biodiversity.


Pinus nigra subsp. salzmannii Dendrochronology Spain Relict Genetic resource Conservation 



This research was partially funded by the Senscom (CGL2008-06005), Dendro-Avenidas (CGL2007-62063) and Dinecofor (CGL2011-27229) Research Projects. We thank Aitor Gaston who helped us with Fig. 1, Fernando Gómez who read the Spanish version and the support of the Junta de Castilla y León (Regional Govt.). We also thank the comments of one anonymous reviewer, his contribution have led to much greater clarity in our text.


  1. Amodei T, Guibal F, Fady B (2012) Relationships between climate and radial growth in Pinus nigra Arnold ssp. salzmannii (Dunal) Franco from South of France. Ann For Sci (in review)Google Scholar
  2. Andreu L, Gutiérrez E, Macias M, Ribas M, Bosch O, Camarero JJ (2007) Climate increases regional tree-growth variability in Iberian pine forests. Glob Change Biol 13:804–815. doi: 10.1111/j.1365-2486.2007.01322.x Google Scholar
  3. Arias B (2010) Caracterización del estado actual de la fuente semillera de Pinus nigra del M.U.P. 44 “El Pinar” en el T.M. de Navalacruz (Ávila). Propuestas de gestión y mejora, para su integración en la Red acional de UGRGFs. Proyecto Fin de Carrera. Facultad de Ciencias y Artes, UCAV. ÁvilaGoogle Scholar
  4. Benito Garzón M, Sánchez de Dios R, Sainz Ollero H (2007) Predictive modelling of tree species distributions on the Iberian Peninsula during the last glacial maximum and Mid-Holocene. Ecography 30:120–134. doi: 10.1111/j.0906-7590.2007.04813.x Google Scholar
  5. Benso M (2007) Estudio dendrocronológico de Pinus sylvestris L. en los Montes de Valsaín (Segovia). Proyecto Fin de Carrera dirigido por M. Génova. Escuela Universitaria de Ingeniería Técnica Forestal. Universidad Politécnica de MadridGoogle Scholar
  6. Biondi F, Waikul K (2004) Dendroclim 2002: a C++ program for statistical calibration of climate signals in tree chronologies. Comput Geosci 30:303–311. doi: 10.1016/j.cageo.2003.11.004 CrossRefGoogle Scholar
  7. Ceballos L (1966) Mapa Forestal de España 1:40.000. Ministerio de Agricultura, MadridGoogle Scholar
  8. Cook ER, Holmes RL (1996) Guide for computer program ARSTAN. In: Grissino-Mayer HD, Holmes R, Fritts HC (eds) The international tree-ring data bank program library version 20 user’s manual. Laboratory of Tree-Ring Research, University of Arizona, Tucson, pp 75–87Google Scholar
  9. Cook E, Kairiukstis L (1990) Methods of dendrochronology. Applications in the environmental sciences. Kluwer Academic Publishers, Dordrecht, p 393Google Scholar
  10. Costa M, Morla C, Sainz Ollero H (eds) (1997) Los bosques ibéricos. Una interpretación geobotánica Planeta, Barcelona, p 572Google Scholar
  11. de Luis M, Raventos J, Cortina J, Moro MJ, Bellot J (1998) Assessing components of a competition index to predict growth in an even-aged Pinus nigra stand. New For 15:223–242CrossRefGoogle Scholar
  12. Fritts HC (1976) Tree rings and climate. Academic Press, LondonGoogle Scholar
  13. Fulé PZ, Ribas M, Gutiérrez E, Vallejo R, Kaye MW (2008) Forest structure and fire history in an old Pinus nigra forest, eastern Spain. For Ecol Manag 255:1234–1242. doi: 10.1016/j.foreco.2007.10.046 CrossRefGoogle Scholar
  14. Gandía R, Iglesias A, Martín JM (2005) Los recursos genéticos de Pinus nigra Arnold salzmannii (Dunal) Franco en la Sierra de Gredos, diario de su conservación. In: Grande Ortiz M, García Abril A (eds) Los pinares de Pinus nigra en España: Ecología, uso y gestión. Fundación Conde del Valle Salazar, Madrid, pp 643–664Google Scholar
  15. García R (2009) Información histórica sobre los bosques de Gredos. In: Génova M, Gómez Manzaneque F, Morla C (eds) Los bosques de Gredos a través del tiempo. Junta de Castilla y León, Valladolid, pp 181–238Google Scholar
  16. Gareca EE, Fernández M, Stanton S (2010) Dendrochronological investigation of the high Andean tree species Polylepis besseri and implications for management and conservation. Biodivers Conserv 19:1839–1851. doi: 10.1007/s10531-010-9807-z CrossRefGoogle Scholar
  17. Génova M (1998) Estudio de los anillos de crecimiento y su relación con las variables meteorológicas en el pinar de Lillo (León). Ecologia 12:237–250Google Scholar
  18. Génova M (2007) El crecimiento de Abies pinsapo y el clima de Grazalema: aportaciones dendroecológicas. Investigacion agraria. Sistemas y Recursos forestales 16(2):145–157Google Scholar
  19. Génova M (2009) Cronologías milenarias de anillos de crecimiento. In: Génova M, Gómez Manzaneque F, Morla C (eds) Los bosques de Gredos a través del tiempo. Junta de Castilla y León, Valladolid, pp 151–177Google Scholar
  20. Génova M, Fernández A (1999) Tree rings and climate of Pinus nigra subsp. salzmannii in Central Spain. Dendrochronologia 16–17:75–86Google Scholar
  21. Génova M, Gómez Manzaneque F, Regato P (1988) Sobre los pinares relictos de la sierra de Gredos (Ávila). Actas del Simposio Internacional de Botánica Pius Font i Quer 2:439–442Google Scholar
  22. Génova M, Manrique E, Fernández A (2005) Estudios dendrocronológicos y reconstrucciones dendroclimáticas realizadas en España con Pinus nigra ssp. salzmannii. In: Grande Ortiz M, García Abril A (eds) Los pinares de Pinus nigra en España: Ecología, uso y gestión. Fundación Conde del Valle Salazar, Madrid, pp 109–126Google Scholar
  23. Génova M, Benso M, Moya P (2009) Análisis de la dinámica forestal registrada en los anillos de crecimiento. Actas 5º Congreso Forestal Español. 5CFE01-021Google Scholar
  24. Génova M, Gómez Manzaneque F, Morla C (eds) (2009b) Los bosques de Gredos a través del tiempo. Junta de Castilla y León, ValladolidGoogle Scholar
  25. Gómez Manzaneque F (2009) La cubierta vegetal y la Flora. In: Génova M, Gómez Manzaneque F, Morla C (eds) Los bosques de Gredos a través del tiempo. Junta de Castilla y León, Valladolid, pp 43–84Google Scholar
  26. Gómez Manzaneque F, Génova M, Regato P (2005) Los pinares de Pinus nigra del Sistema Central. In: Grande Ortiz M, García Abril A (eds) Los pinares de Pinus nigra en España: Ecología, uso y gestión. Fundación Conde del Valle Salazar, Madrid, pp 633–642Google Scholar
  27. Hampe A, Petit RJ (2005) Conserving biodiversity under climate change: the rear edge matters. Ecol Lett 8:461–467. doi: 10.1111/j.1461-0248.2005.00739.x PubMedCrossRefGoogle Scholar
  28. Harper K, Boudreault C, DeGrandpré L, Drapeau P, Gauthier S, Bergeron Y (2003) Structure, composition, and diversity of old-growth black spruce boreal forest of the Clay Belt region in Quebec and Ontario. Environ Rev 11:S79–S98CrossRefGoogle Scholar
  29. Holmes R (1992a) Users manual for Program Cofecha by Laboratory of Tree-Ring Research. University of Arizona, TucsonGoogle Scholar
  30. Holmes R (1992b) Dendrochronology program library. Installation and program manual. Laboratory of Tree-Ring Research, University of Arizona, TucsonGoogle Scholar
  31. Holmes R (1999) Program JOLTS: finding growth surges or suppressions in trees. Laboratory of Tree-Ring Research, University of Arizona, TucsonGoogle Scholar
  32. Holmes RL, Lough JM (1999) Users manual for program RESPO. Laboratory of Tree-Ring Research, University of Arizona, TucsonGoogle Scholar
  33. Icona (1990) Clasificación General de los Montes Públicos, 1859. Madrid, Imprenta nacional, 1859. Reedición facsímil del ICONA, MadridGoogle Scholar
  34. Leal S, Melvin TM, Grabner M, Wimmer R, Briffa KR (2007) Tree ring growth variability in the Austrian Alps: the influence of site, altitude, tree species and climate. Boreas 36:426–440. doi: 10.1080/03009480701267063 CrossRefGoogle Scholar
  35. Linares JC, Tiscar PA (2010) Climate change impacts and vulnerability of the southern populations of Pinus nigra subsp. salzmannii. Tree Physiol 30:795–806. doi: 10.1093/treephys/tpq052 PubMedCrossRefGoogle Scholar
  36. Lorimer CG, Frelich LE (1989) A methodology for estimating canopy disturbance frequency and intensity in dense temperate forests. Can J For Res 19(5):651–663CrossRefGoogle Scholar
  37. Martín-Benito D, Cherubini P, del Rio M, Cañellas I (2008) Growth response to climate and drought in Pinus nigra Arn. trees of different crown classes. Trees 22:363–373. doi: 10.1007/s00468-007-0191-6 CrossRefGoogle Scholar
  38. Martín-Benito D, Kint V, Río M, Muys B, Cañellas I (2011) Growth responses of West-Mediterranean Pinus nigra to climate change are modulated by competition and productivity: past trends and future prespectives. For Ecol Manag 262:1030–1040Google Scholar
  39. McCarthy JW, Weetman G (2006) Age and size structure of gap-dynamic, old-growth boreal forest stands in Newfoundland. Silva Fennica 40(2):209–230Google Scholar
  40. Moya P (2008) Cronologías de crecimiento del pinar relicto de Pinus nigra A. subsp. salzmannii de Navalacruz (Ávila). Proyecto Fin de Carrera dirigido por M. Génova. Escuela Técnica Superior de Ingenieros de Montes. Universidad Politécnica de MadridGoogle Scholar
  41. Parish R, Antos JA, Fortin MJ (1999) Stand development in an old-growth subalpine forest in southern interior British Columbia. Can J For Res 29:1347–1356CrossRefGoogle Scholar
  42. Piutti E, Cescatti A (1997) A quantitative analysis of the interactions between climatic response and intraspecific competition in European beech. Can J For Res 27(3):277–284. doi: 10.1139/96-176 CrossRefGoogle Scholar
  43. Price RA, Liston A, Strauss SH (1998) Phylogeny and systematics of Pinus. In: Richardson DM (ed) Ecology and biogeography of Pinus. Cambridge University Press, Cambridge, pp 49–68Google Scholar
  44. Regato P, Elena R, Sánchez Palomares O (1991) Estudio autoecológico comparativo de Pinus nigra Am subespecie salzmannii de la Península ibérica y otras subespecies de la región circunmediterránea. Investigación agraria. Sistemas y recursos forestales 0:49–59Google Scholar
  45. Regato P, Génova M, Gómez F (1992) Las representaciones relictas de Pinus nigra Arnold en el Sistema Central Español. Boletín de la Real Sociedad de Historia Natural S.B. 88 (1-4): 63-71Google Scholar
  46. Rinn F (2005) TSAPWin: time series analysis and presentation for dendrochronology and related applications, version 0.53: user reference. HeidelbergGoogle Scholar
  47. Rivas-Martínez S (1963) Estudio de la vegetación y flora de las Sierras de Guadarrama y Gredos. Anales Instituto Botánico A. J. Cavanilles XXI. Fasc. I, MadridGoogle Scholar
  48. Rozas V (2004) A dendroecological reconstruction of age structure and past management in an old-growth pollarded parkland in northern Spain. For Ecol Manag 195:205–219. doi: 10.1016/j.foreco.2004.02.058 CrossRefGoogle Scholar
  49. Rubiales JM, Génova M (2012) Late-Holocene forest history of the Gredos Mountains (Central Spain): evidence from megafossils and tree rings. Quat Res (in review)Google Scholar
  50. Rubiales JM, García-Amorena I, Génova M, Gómez Manzaneque F, Morla C (2007) The Holocene history of highland pine forests in a submediterranean mountain: the case of Gredos mountain range (Iberian Central range, Spain). Quat Sci Rev 26:1759–1770. doi: 10.1016/j.quascirev.2007.04.013 CrossRefGoogle Scholar
  51. Sánchez Mata D (1989) Estudio de la flora y vegetación del macizo oriental de Gredos. Dip. Prov. ÁvilaGoogle Scholar
  52. Sardinero S (2004) Flora y vegetación del macizo occidental de la Sierra de Gredos (Sistema Central, España). Guineana 10:1–474Google Scholar
  53. Schweingruber FH (1996) Tree rings and environment: dendroecology. Swiss Federal Institute for Forest, Snow and Landscape Research. Paul Haupt Verlag, Bern, p 609Google Scholar
  54. Serrada R (2005) Estrategias regenerativas de Pinus nigra, comparación con los otros pinos españoles. In: Grande Ortiz M, García Abril A (eds) Los pinares de Pinus nigra en España: Ecología, uso y gestión. Fundación Conde del Valle Salazar, Madrid, pp 369–392Google Scholar
  55. Shankhar S, Lebreton P (2010) Taxonomy and systematics of the genus Pinus based on morphological, biogeographical and biochemical characters. Plant Syst Evol 284:1–15. doi: 10.1007/s00606-009-0228-y CrossRefGoogle Scholar
  56. Tíscar PA, Linares JC (2011) Pinus nigra subsp. salzmannii forests from Southeast Spain: Using structure and process information to guide management. In: Frisiras CT (ed) Pine forests: types, threats and management, vol 11. Nova Science Publishers Inc., Hauppauge, pp 1–27Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  1. 1.Escuela Universitaria de Ingeniería Técnica ForestalUniversidad Politécnica de MadridMadridSpain
  2. 2.Scharlab, S.L.SentmenatSpain

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