An isolated population of <i>Heterobasidion abietinum</i> on <i>Abies pinsapo</i> in Spain

Sánchez, María Esperanza Valdés; Luchi, Nicola; Jiménez, José Luis Ubera; Vita, P. De; Sánchez, Joaquín; Trapero, A.; Capretti, P.

doi:10.1111/j.1439-0329.2007.00514.x

Cited by 19 publications

(32 citation statements)

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“…No obstante, algunos aspectos relacionados con ésta, como la dinámica natural de regeneración, son prácticamente desconocidos (salvo para Arista (1995). Por otro lado, sí está bien descrita la incidencia de un hongo patógeno de raíz (Heterobasidion abietinum, el grupo de interesterilidad F de Heterobasidion annosum) específico de este abeto (Sánchez et al 2005, Sánchez et al 2007a, 2007b, de Vita et al 2007, cuyo ataque genera un patrón de mortalidad en rodales (Figura VI.2), que está dando lugar a la formación de claros en el pinsapar (Sánchez et al 2005, Linares et al 2010a. Su efecto es especialmente notable en la banda latitudinal inferior (1000 -1300 m), donde la mayor duración de la sequía estival incrementa la susceptibilidad del huésped a los efectos de la infección por un patógeno que generalmente no resulta tan virulento (Korhonen et al 1998;Puddu et al 2003), contribuyendo entre otras causas a un mayor número de individuos afectados (de Vita et al 2007).…”

Section: Vi12 Patrones De Regeneración Natural En Bosques De Abiesunclassified

“…Estas poblaciones muestran además claros síntomas de declive, relacionados con la incidencia de periodos sucesivos de sequía y la propia estructura forestal ), que incrementan la susceptibilidad ante el ataque de un hongo patógeno de raíz (Heterobasidion annosum) específico de este abeto (Sánchez et al 2007a). La confluencia de estos factores genera un patrón de mortalidad en rodales (Sánchez et al 2005) que constituye a su vez una fuente de heterogeneidad espacial a pequeña escala, al producirse huecos que rompen la continuidad del dosel, en los que se incrementan notablemente tanto los niveles de irradiancia incidente como las tasas de evaporación. En estas circunstancias, podría intensificarse la competencia con otras especies forestales presentes en el pinsapar, como Pinus spp.…”

Section: Vii3 Estrategia De Uso De Los Recursos Y Tolerancia Al Estunclassified

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Análisis comparativo de la ecofisiología de dos especies emparentadas de abetos circunmediterráneos: rasgos adaptativos y compensación de factores en Abies pinsapo y Abies alba en el contexto de eventos de calentamiento climático

Serichol-Escobar

2014

ECOS

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Section: Vi12 Patrones De Regeneración Natural En Bosques De Abiesunclassified

Section: Vii3 Estrategia De Uso De Los Recursos Y Tolerancia Al Estunclassified

Análisis comparativo de la ecofisiología de dos especies emparentadas de abetos circunmediterráneos: rasgos adaptativos y compensación de factores en Abies pinsapo y Abies alba en el contexto de eventos de calentamiento climático

Serichol-Escobar

2014

ECOS

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“…Some H. annosum s.l. individuals are also able to colonize tens of tree stumps (Piri 1996), or spreading tens of meters by lateral growth , Lygis et al 2004a, Sánchez et al 2007). On the other hand, single conifer stumps are sometimes occupied by numerous genetically different strains of H. annosum s.l.…”

Section: Heterobasidion Annosum Species Complexmentioning

confidence: 99%

“…sensu lato (Basidiomycota, Bondarzewiaceae) and Phlebiopsis gigantea (Fr.) Jülich (Basidiomycota, Corticiaceae), the study organisms of the present thesis (Stenlid 1985, Piri 1996, Holmer and Stenlid 1997, Roy et al 1997, Swedjemark and Stenlid 2001, Pettersson et al 2003, Roy et al 2003, Vasiliauskas et al 2004, 2005a, Sánchez et al 2007). …”

Section: Introduction the Fungal Individual Population And Speciesmentioning

confidence: 99%

Ecological impacts of Phlebiopsis gigantea biocontrol treatment against Heterobasidion spp. as revealed by fungal community profiling and population analyses

Vainio¹

2008

Diss. For.

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Wood decay fungi belonging to the species complex Heterobasidion annosum sensu lato are among the most common and economically important species causing root rot and stem decay in conifers of the northern temperate regions. New infections by these pathogens can be suppressed by tree stump treatments using chemical or biological control agents. In Finland, the corticiaceous fungus Phlebiopsis gigantea h a s b e e n f o r m u l a t e d i n t o a commercial biocontrol agent called Rotstop (Verdera Ltd.).This thesis addresses the ecological impacts of Rotstop biocontrol treatment on the mycoflora of conifer stumps. Locally, fungal communities within Rotstop-treated and untreated stumps were analyzed using a novel method based on DGGE profiling of small subunit ribosomal DNA fragments amplified directly from wood samples. Population analyses for P. gigantea and H. annosum s.l. were conducted to evaluate possible risks associated with local and/or global distribution of the Rotstop strain.Based on molecular community profiling by DGGE, we detected a few individual wood-inhabiting fungal species (OTUs) that seemed to have suffered or benefited from the Rotstop biocontrol treatment. The DGGE analyses also revealed fungal diversity not retrieved by cultivation and some fungal sequence types untypical for decomposing conifer wood. However, statistical analysis of DGGE community profiles obtained from Rotstoptreated and untreated conifer stumps revealed that the Rotstop treatment had not caused a statistically significant reduction in the species diversity of wood-inhabiting fungi within our experimental forest plots.Locally, ISSR genotyping of cultured P. gigantea strains showed that the Rotstop biocontrol strain was capable of surviving up to six years within treated Norway spruce stumps, while in Scots pine stumps it was sooner replaced by successor fungal species. In addition, the spread of resident P. gigantea strains into Rotstop-treated forest stands seemed effective in preventing the formation of genetically monomorphic populations in the short run. On a global scale, we detected a considerable level of genetic differentiation between the interfertile European and North American populations of P. gigantea. These results strongly suggest that local biocontrol strains should be used in order to prevent global spread of P. gigantea and hybrid formation between geographically isolated populations.The population analysis for H. annosum s.l. revealed a collection of Chinese fungal strains that showed a high degree of laboratory fertility with three different allopatric H. annosum s.l. taxa. However, based on the molecular markers, the Chinese strains could be clearly affiliated with the H. parviporum taxonomical cluster, which thus appears to have a continuous distribution range from Europe through southern Siberia to northern China.

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“…The incidence of fungal-related mortality induced by the root rot fungus Heterobasidion annosum Bref. (Basidiomyceta, Corialaceae) and to a lower extent by damage caused by other species (e.g., Armillaria mellea (Vahl) P. Kumm) has increased over the last twenty years in formerly managed A. pinsapo forests (Navarro Cerrillo et al 2003, Sánchez et al 2007). In fact, significant differences in infection incidence of H. annosum have been observed We explored the effects of tree-fall gaps caused by Heterobasidion annosum-induced tree death on the regeneration of the relict Abies pinsapo in southern Spain.…”

Section: Introductionmentioning

confidence: 99%

Regeneration of Abies pinsapo within gaps created by Heterobasidion annosum-induced tree mortality in southern Spain

Navarro-Cerrillo¹,

Camarero²,

Manzanedo³

et al. 2014

iForest

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© iForest -Biogeosciences and Forestry IntroductionComprehensive knowledge of how forest structure develops in response to natural disturbances is essential to evaluate current forest conditions and to promote sustainable silviculture and conservation systems in the future (McCarthy 2001). In Mediterranean montane forests, disturbances killing or removing small groups of trees are important drivers that create habitat heterogeneity and trigger successional dynamics (Dubé et al. 2005, Linares & Carreira 2009). This process may culminate in the replacement of the original dominant canopy species by individuals of different tree species at the stand scale. In such cases, gap disturbance would promotes the coexistence of species with different resource-use strategies, dispersal and competitive abilities (Veblen 1992). Implementation and exploitation of these natural succession processes in forest management is a desirable approach for threatened or endangered tree species. Therefore, detailed knowledge of how various tree species establish within gaps could be an efficient way to introduce ecological mechanisms into current silvicultural systems (Veblen 1992, Beckage et al. 2000.The Spanish fir (Abies pinsapo Boiss.) is a relict fir species endemic to southern Spain and northern Morocco. It has been hypothesized that A. pinsapo populations remained isolated throughout the Quaternary (AlbaSánchez et al. 2010). Such historical isolation caused significant morphological, genetic and ecological differentiation from other circum-Mediterranean fir species (Martín et al. 2010, Linares 2011. A. pinsapo forests were subjected to intense human use (e.g., grazing and logging for timber, firewood, and charcoal) until the mid-20 th century. As a result, the current structure and tree species composition of A. pinsapo forests reflect their past use and management (Linares et al. 2010a, Esteban et al. 2010. Previous research on A. pinsapo regeneration has mainly focused on several reproductive stages of the species such as cone and seed production as well as seedling abundance (Arista et al. 1997). Nevertheless, there is scarce information on A. pinsapo seedling and sapling abundance as related to gap dynamics.Many studies on the role of gap formation in tree regeneration have been conducted in montane or temperate forests (Runkle 1985, Degen et al. 2005, Sapkota & Odén 2009). However, little attention has been paid to the role of gaps as regeneration foci in Mediterranean conifer forests. Most studies on forest gap regeneration in mesic fir forests have been performed in continuous forests with large tree-fall gaps that greatly differ in size (Dobrowolska & Veblen 2008). Yet, few studies have addressed how pest-related canopy gaps drive regeneration dynamics in Mediterranean fir forests. At the landscape scale, the natural disturbance regime of A. pinsapo forests in Spain is driven by fire, drought and fungal infection (Arista 1995, Linares & Carreira 2009). In the absence of fire or pest outbreaks, the creation of small canopy g...

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An isolated population of Heterobasidion abietinum on Abies pinsapo in Spain

Cited by 19 publications

References 10 publications

Análisis comparativo de la ecofisiología de dos especies emparentadas de abetos circunmediterráneos: rasgos adaptativos y compensación de factores en Abies pinsapo y Abies alba en el contexto de eventos de calentamiento climático

Análisis comparativo de la ecofisiología de dos especies emparentadas de abetos circunmediterráneos: rasgos adaptativos y compensación de factores en Abies pinsapo y Abies alba en el contexto de eventos de calentamiento climático

Ecological impacts of Phlebiopsis gigantea biocontrol treatment against Heterobasidion spp. as revealed by fungal community profiling and population analyses

Regeneration of Abies pinsapo within gaps created by Heterobasidion annosum-induced tree mortality in southern Spain

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