Evolución de la composición florística Post-fuego en un carrascal de Navarra (n de España)

Cavero, Rita Yolanda; Ederra, A.

doi:10.3989/pirineos.1999.v153-154.107

Cited by 5 publications

(2 citation statements)

References 56 publications

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“…The highest values for the two parameters coincide with the maximum explosion of herbaceous species during the first 4-5 years, and then both decrease. This increase in the richness values in the first few stages has been described by other authors who analysed post-fire vegetation recovery (Naveh and Dann, 1974;Lepart, 1980, 1981;Casal et al, 1990;Bond and Van Wilgen, 1996;Cavero and Ederra, 1999;Naveh, 1999). The decrease in diversity values is produced by the community starting to stabilise or by the changes being brought to a standstill, and this results in a marked dominance of woody species and, in these zones, of Erica australis.…”

Section: Discussionmentioning

confidence: 58%

Secondary succession after perturbations in a shrubland community

2002

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Shrubland responses to experimental burning, cutting and ploughing treatments were studied over 15 years in two shrubland communities dominated by Erica australis. The treatments represent the most frequent forms of anthropogenic disturbances experienced by these communities throughout their history. The response to burning and cutting treatments is similar, and the succession process is characterised as autosuccession. The highest values for herbaceous annuals and perennials were observed in the third and fourth years. Generally, herbaceous species remain present throughout the study period, while woody taxa ones increase their cover values over time. The quantity of herbaceous species present is in inverse proportion to the quantity of woody taxa. The woody species that appear immediately after treatments are sprouting species, namely Erica australis and Arctostaphylos uva-ursi. The response to ploughing is slower, reflecting the recovery mechanism (seedlings). However, after 15 years, there are no significant differences in regeneration between treatments. The first stages of this post-ploughing succession are dominated by annual species until the fourth or fifth years, after which woody species begin to dominate and herbaceous taxa decrease considerably. Woody species with high germination values are Halimium alyssoides and Halimium umbellatum. These shrubland communities have a very high resilience to such perturbations and start regenerating rapidly, reaching the original state in about 9 years. The appearance of the climax arboreal species of the area, Quercus pyrenaica, when it comes from germination, occurs 15 years after the perturbations.

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Section: Discussionmentioning

confidence: 58%

Secondary succession after perturbations in a shrubland community

2002

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“…Dominance indices for transect records: (a) of the most abundant species (DI(1)= 100 (N I / N)), (b) of the two more abundant species (DI(2)= 100 (N I + N II / N)), where N I and N II were the number of contacts of the first and second most abundant species, respectively, and N was the total number of contacts of all species sampled; 5. Relative abundance for transect records: (1) for 23 species, those present at least in half study areas, (2) for species grouped according to their regenerative strategy (resprouter, seeder and resprouter-seeder following Clemente et al 1996;Cavero & Ederra 1999;Lloret et al 2003), (3) for species grouped according to their Raunkiaer biological type (Raunkiaer 1934), based on the position and degree of protection of permanent buds: macrophanerophytes (trees), nanophanerophytes (shrubs), other phanerophytes (palms and vines), chamaephytes (subshrubs), geophytes, hemicryptophytes (perennial forbs and grasses) and therophytes (annuals) (Bolòs et al 1990).…”

Section: Discussionmentioning

confidence: 99%

Effects of repeated burning on Mediterranean communities of the northeastern Iberian Peninsula

Gozalbo

Lloret

2006

J Vegetation Science

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Question: In relation to a single fire, do repeated wildfires in Mediterranean type ecosystems (1) reduce plant species richness or diversity; (2) modify patterns of abundance or dominance of plant species or (3) alter plant composition? Location: Pinus halepensis dominated communities of Catalonia, northeastern Iberian Peninsula, western Mediterranean Basin. Methods: Regional, paired design with 14 study sites, each consisting of a once burnt area (1994) and a twice burnt area (1975–1993 and 1994). Ten years after the last fire, we recorded all vascular plant species present in nested plots and quantified their relative abundances on transects. We compared species richness, diversity, dominance and relative abundance and species‐area correlations between paired once and twice burnt areas and assessed their floristic composition similarity. Results: No statistically significant differences were found in species richness or diversity. Slopes of species‐area correlations were higher in once burnt areas. In twice burnt areas, dominance by one or two species was higher. P. halepensis showed lower relative abundance and nanophanerophytes showed higher relative abundance. No differences were found for resprouter, seeder or resprouter‐seeder species. Floristic composition similarity between paired areas tended to be higher in less productive sites. Conclusions: Fire recurrence had contrasting effects on species richness at different spatial scales. Repeated burning reduced the relative abundance of the dominant tree species, which resulted in a higher relative abundance of shrubs. It also promoted the dominance of herbs, particularly Brachypodium retusum. However, it did not change the relative abundance of regenerative groups. Paired areas were more similar as they were more Mediterranean in terms of climatic conditions.

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