Recovery after Experimental Cutting and Burning in Three Shrub Communities with Different Dominant Species

The aim of this study is to compare the recovery dynamics in three shrub communities subjected to experimental burning and cutting, and situated on an altitudinal gradient. Climatic features are different in each area, but all had the common characteristic of very homogeneous vegetation cover before the disturbances, with only one shrub species clearly dominant, a different taxon in each area, and with different regeneration strategies. The first area was a heathland dominated by Calluna vulgaris, situated at an altitude of 1600 m, with a continental climate (mean annual precipitation 1320 mm). The second area was a heathland dominated by Erica australis, located at an altitude of 1000 m (mean annual precipitation 840 mm). The third area was a Cistus ladanifer shrubland, located at 900 m altitude, with a Mediterranean climate similar to that of the previous area, but with lower mean annual precipitation (470 mm). Erica australis recovers by vegetative resprouting, but Cistus ladanifer is an obligate seeder, as is Calluna vulgaris in these areas. Each experimental disturbance was carried out over 100 m2 in each area. Post-fire recovery is faster in Cistus ladanifer: 2 years after burning there was 40% cover vs. less than 20% in the other two species. However, recovery after cutting was similar for Cistus ladanifer and Erica australis. Calluna vulgaris recovers very slowly, with cover values below 20% even 10 years after both disturbances. Cover of dominant shrub species is negatively correlated with cover of herbaceous species. So different recovery of dominant species lead a different community dynamic in each area.

[1]  L. Trabaud.  Modalités de germination des cistes et des pins méditerranéens et colonisation des sites perturbés , 1995, Revue d'Écologie (La Terre et La Vie).

[2]  Jon E. Keeley,et al.  Resilience of mediterranean shrub communities to fires , 1986 .

[3]  R. Cowling,et al.  Plant diversity in mediterranean-climate regions. , 1996, Trends in ecology & evolution.

[4]  M. Jiménez,et al.  La regeneración de los montes incendiados en Galicia , 1984 .

[5]  J. Moreno,et al.  Seasonal course of total non-structural carbohydrates in the lignotuberous Mediterranean-type shrub Erica australis , 2001, Oecologia.

[6]  E. Luis,et al.  Influence of Heat on Seed Germination of Cistus laurifolius and Cistus ladanifer , 1992 .

[7]  Arthur S. Lieberman,et al.  Landscape Ecology , 1994, Springer New York.

[8]  Juli G. Pausas,et al.  Mediterranean vegetation dynamics: modelling problems and functional types , 2004, Plant Ecology.

[9]  R. Aerts.  Competition between dominant plant species in heathlands , 1993 .

[10]  B. Clément,et al.  Vegetation dynamics in Brittany heathlands after fire , 1981, Vegetatio.

[11]  E. Luis,et al.  Regeneration patterns in a Calluna vulgaris heathland in the Cantabrian mountains (NW Spain): effects of burning, cutting and ploughing , 2002 .

[12]  Ted L. Hanes.  Succession after Fire in the Chaparral of Southern California , 1971 .

[13]  E. Luis,et al.  Secondary succession after perturbations in a shrubland community , 2002 .

[14]  L. Trabaud,et al.  Diversity and stability in garrigue ecosystems after fire , 1980, Vegetatio.

[15]  B. W. Wilgen,et al.  Fire and Plants , 1995, Population and Community Biology Series.

[16]  A. Llamazares,et al.  Caracterización agroclimática de la provincia de Huesca , 1988 .

[17]  J. Canadell,et al.  Underground Structures of Woody Plants in Mediterranean Ecosystems of Australia, California, and Chile , 1995 .

[18]  H. A. David,et al.  THE DISTRIBUTION OF THE RATIO, IN A SINGLE NORMAL SAMPLE, OF RANGE TO STANDARD DEVIATION , 1954 .

[19]  M. Bruggink.  Seed bank, germination, and establishment of ericaceous and gramineous species in heathlands , 1993 .

[20]  Zev Naveh,et al.  LANDSCAPE ECOLOGY: THEORY AND APPLICATION , 1983, Landscape Journal.

[21]  Z. Naveh,et al.  The evolutionary significance of fire in the mediterranean region , 2006, Vegetatio.

[22]  R. Tárrega,et al.  Seed banks of Erica australis and Calluna vulgaris in a heathland subjected to experimental fire , 2000 .

[23]  K. Hodgkinson.  Sprouting success of shrubs after fire: height-dependent relationships for different strategies , 1998, Oecologia.

[24]  Z. Naveh.  FIRE IN THE MEDITERRANEAN - A LANDSCAPE ECOLOGICAL PERSPECTIVE. , 1990 .

[25]  M. Vilà,et al.  Clearing of vegetation in Mediterranean garrigue: response after a wildfire , 1997 .

[26]  H. J. Degn.  Succession from farmland to heathland: a case for conservation of nature and historic farming methods , 2001 .

[27]  O. W. Archibold.  Ecology of World Vegetation , 1994, Springer Netherlands.

[28]  Elena Marcos,et al.  History of landscape changes in northwest Spain according to land use and management , 2000 .

[29]  M. Casal,et al.  Effect of high temperatures and ash on germination of ten species from gorse shrubland , 1995, Vegetatio.

[30]  C. Gimingham,et al.  Regeneration of heathland plants following burning , 1983, Vegetatio.

[31]  L. Trabaud.  Natural and prescribed fire: survival strategies of plants and equilibrium in mediterranean ecosystems , 1987 .

[32]  L. Calvo,et al.  Space-time distribution patterns of shape Erica australis L. subsp. shape aragonensis (Willk) after experimental burning, cutting, and ploughing , 1998, Plant Ecology.

[33]  W. G. Cochran.  The distribution of the largest of a set of estimated variances as a fraction of their total , 1941 .

[34]  B. Clément,et al.  Plant strategies and secondary succession on Brittany heathlands after severe fire , 1990 .