Postfire, natural regeneration of Pinus brutia forests in Thasos island, Greece

Spanos, Ioannis; Daskalakou, Evangelia N.; Thanos, Costas A.

doi:10.1016/s1146-609x(00)00107-7

Cited by 65 publications

(59 citation statements)

References 10 publications

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“…For seedlings established after the same fire on the island of Thassos, Spanos et al (2000) found a mean density range between 20,000 and 60,000 n . ha -1 in the first growth period after the fire, while five years later the range became 6,000 to 20,000 n .…”

Section: Discussionmentioning

confidence: 91%

“…However, it is possible that some of the trees that were cut were established in autumn just after the fire but their growth in that period was very little and not detected in the cross-sectional discs. Spanos et al (2000) mentioned that establishment of seedlings in the study area began one year after the fire as a result of a severe drought observed after the fire and during autumn. However, they also reported that all the seedlings emerged in the first growth period after the fire.…”

Section: Discussionmentioning

confidence: 99%

“…There are lots of studies on Post-fire regeneration of the species (THANOS et al 1989, THANOS and MARKOU 1991, SPANOS et al 2000, SPANOS et al 2001. However, even though, there are many researches regarding the age structure of regeneration plants after a fire, there is no research in the tree age range and distribution in the duration of stem exclusion stage, a few years after the end of stand initiation stage.…”

Section: Introductionmentioning

confidence: 99%

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Does Crown Class Classification Improve the Initiation and Development Analysis of Post-Fire Pinus Brutia Stands?

Bountis

Milios

2017

CERNE

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The present study was conducted in Pinus brutia Ten. stands which were created after the forest fire of 1989, in the island of Thassos. In 2008, 45 plots of 5 x 5 m were randomly established in three site types. In each plot, the trees were counted, while the breast height diameter of trees was measured. All trees were classified as dominant, codominant, intermediate or suppressed. In each plot, one tree from each crown class was selected (a total of 160 trees) and were cut down. From each tree a cross-sectional disc was cut from the ground level and the number of annual growth rings was counted. A few years of age difference between trees in post fire establishment determined the crown class of a tree. The age difference and the number of trees were reduced from the less productive site type to the more productive site type. Codominant trees were (or will become) the crown class with the most numerous trees in the main canopy. Dominant trees were one of the most, if not the most, significant elements of stand structure and production regarding basal area. This was not the case in low productivity site type as a result of delayed dimension differentiation. Analysis of young P. brutia stands, through the classification of trees into crown classes, increased the amount of attained information, since it provided an improved insight in the competition regime. A CLASSIFICAÇÃO DA CLASSE DE COPA MELHORA A ANÁLISE DA INICIAÇÃO E DESENVOLVIMENTO DE TALHÕES DE PINUS BRUTIA APÓS OCORRENCIA DE FOGO?RESUMO: O presente estudo foi conduzido em talhões de Pinus brutia Ten. que foram criados após o incêndio florestal de 1989, na ilha de Thassos. Em 2008, 45 parcelas de 5 x 5 m foram estabelecidas aleatoriamente em três tipos de sítos. Em cada parcela, as árvores foram contadas e o diâmetro a altura do peito das árvores foi medido. Todas as árvores foram classificadas como dominantes, codominantes, intermediárias ou suprimidas. Em cada parcela, uma árvore de cada classe de copa foi selecionada (um total de 160 árvores) e cortada. De cada árvore foi cortado um disco transversal no nível do solo e contado o número de anéis de crescimento. Uma diferença de alguns anos de idade entre as árvores após o estabelecimento pós-fogo determinou a classe de copa da árvore. A diferença de idade e o número de árvores foram reduzidos do sítio menos produtivo para o mais produtivo. As árvores codominantes foram (ou se tornarão) a classe de copa com mais árvores no dossel principal. As árvores dominantes foram um dos elementos mais significativos, se não o mais significativo, da estrutura e produção do talhão em relação à área basal. Este não foi o caso no sítio de baixa produtividade devido ao atrazo da diferenciação do tamanho das árvores. A análise dos povoamentos jovens de P. brutia, através da classificação das árvores em classes de copa, aumentou a quantidade de informação obtida, uma vez que proporcionou uma melhor percepção do regime de competição.

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Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Does Crown Class Classification Improve the Initiation and Development Analysis of Post-Fire Pinus Brutia Stands?

Bountis

Milios

2017

CERNE

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“…This field has drawn the attention of many vegetation ecologists [11,17,58,59]. A large number of studies document that thermophilous Mediterranean pine forests, including P. brutia forests, are resilient to fire, mainly due to the high post-fire regeneration ability of the taxon [5]. However, long-term observations on P. brutia recovery patterns are rare.…”

Section: Discussionmentioning

confidence: 99%

A Remote Sensing and GIS Approach to Study the Long-Term Vegetation Recovery of a Fire-Affected Pine Forest in Southern Greece

et al. 2015

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Management strategies and silvicultural treatments of fire-prone ecosystems often rely on knowledge of the regeneration potential and long-term recovery ability of vegetation types. Remote sensing and GIS applications are valuable tools providing cost-efficient information on vegetation recovery patterns and their associated environmental factors. In this study we used an ordinal classification scheme to describe the land cover changes induced by a wildfire that occurred in 1983 in Pinus brutia woodlands on Karpathos Aegean Island, south-eastern Greece. As a proxy variable that indicates ecosystem recovery, we also estimated the difference between the NDVI and NBR indices a few months (1984) and almost 30 years after the fire (2012). Environmental explanatory variables were selected using a digital elevation model and various thematic maps. To identify the most influential environmental factors contributing to woodland recovery, binary logistic regression and linear regression techniques were applied. The analyses showed that although a large proportion of the P. brutia woodland has recovered 26 years after the fire event, a considerable amount of woodland had turned into scrub vegetation. Altitude, slope inclination, solar radiation, and pre-fire woodland physiognomy were identified as dominant factors influencing the vegetation's recovery probability. Additionally, altitude and inclination are the variables that explain changes in the satellite remote sensing vegetation indices reflecting the recovery potential. Pinus brutia showed a good post-fire recovery potential, especially in parts of the study area with increased moisture availability.

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“…The results of the research conducted in Samos Island, Greece in 1982 revealed that P. brutia, Cistus species and Leguminosae species had an important role in postfire regeneration (Thanos et al 1989) and the total average density of P. brutia seedlings in six and ten years following the fire was the same (0.15 per m²) (Thanos and Marcou 1993). After a forest fire (in 1989) at a 60-year old P. brutia forest (Thasos Island, Greece), on average 2-6 pine seedlings per m² were recorded by the end of the recruitment period (May 1990) and the density was stabilized at about 0.6-2 seedlings m -2 in five years (Spanos et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Effects of heat shock on seed germination of Turkish red pine (Pinus brutia)

Boydak

Caliskan

2016

Bosque (Valdivia)

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Key words: fire, heat treatment, high temperature, Mediterranean, soil seed bank. RESUMENEl fuego juega un importante papel ecológico en los ecosistemas de tipo mediterráneo. Muchas especies de plantas del Mediterráneo exhiben una capacidad mejorada de germinación cuando se exponen al calor. En el presente estudio, el efecto de altas temperaturas y los tiempos de exposición sobre la germinación de pino rojo de Turquía (Pinus brutia) fue analizado con el fin de revelar la respuesta de las semillas al fuego y las implicaciones en la regeneración de la especie. Las semillas se calentaron en un rango de temperaturas (75 a 170 ºC), con tiempos de exposición (30 segundos a 30 minutos) similares a los obtenidos en las capas superficiales del suelo durante los incendios naturales. En total se realizaron veinte tratamientos. Se calcularon los porcentajes de germinación de la semilla y los valores de germinación para cada tratamiento. Los resultados de ANOVA realizados para los valores de germinación, mostraron que la temperatura tuvo un efecto significativo. Los porcentajes de germinación aumentaron en los tratamientos térmicos a 70 ºC durante 10, 15, 20, 25 y 30 min; a 105 ºC durante 10, 15, 20 y 25 min, y a 130 ºC durante 1 y 2 min. El aumento de la temperatura y los tiempos de exposición generalmente disminuyeron el porcentaje de germinación, especialmente a 130 °C y superior en comparación con los controles. El porcentaje máximo de germinación se alcanzó en el tratamiento a 130 ºC durante 1 minuto, mientras se llegó a la germinación mínima a 130 ºC durante 10 min.Palabras clave: fuego, tratamiento térmico, alta temperatura, mediterráneo, banco de semillas del suelo.

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Postfire, natural regeneration of Pinus brutia forests in Thasos island, Greece

Cited by 65 publications

References 10 publications

Does Crown Class Classification Improve the Initiation and Development Analysis of Post-Fire Pinus Brutia Stands?

Does Crown Class Classification Improve the Initiation and Development Analysis of Post-Fire Pinus Brutia Stands?

A Remote Sensing and GIS Approach to Study the Long-Term Vegetation Recovery of a Fire-Affected Pine Forest in Southern Greece

Effects of heat shock on seed germination of Turkish red pine (Pinus brutia)

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