气候变化领域集成服务门户(CCPortal): Surviving after an eruption: Ecosystem dynamics and mycorrhizae in Nothofagus pumilio forests affected by the 2011 Puyehue Cordón-Caulle tephra

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DOI	10.1016/j.foreco.2020.118535
	Surviving after an eruption: Ecosystem dynamics and mycorrhizae in Nothofagus pumilio forests affected by the 2011 Puyehue Cordón-Caulle tephra
	Moguilevsky D.; Fernández N.V.; Puntieri J.G.; Outes V.; Fontenla S.B.
发表日期	2021
ISSN	0378-1127
卷号	479
英文摘要	Volcanic eruptions affect ecosystems drastically, and ectomycorrhizal fungi (EM) may play a critical role in forest regeneration. Nothofagus species are usually ectomycorrhizal. The 2011 Puyehue Cordón-Caulle volcanic complex (PCCVC) eruption covered vast areas of N. pumilio forests with thick tephra deposits. The main objectives of this work were to characterize the forest environment following tephra deposition, and to analyze the natural regeneration and development of N. pumilio and associated EM communities. Three study sites were selected and sampled two and three years after the PCCVC eruption. Two sites had a thick tephra layer (50 cm); in one of them most of the tree layer was dead (Highly Affected-Tephra) whereas in the other, most of the adult trees were alive (Affected-Tephra). The third site had minimal tephra deposition (Non-Affected). Physicochemical properties of the substrate, biological environmental factors and EM behavior of N. pumilio seedlings and adults were evaluated in all three sites. The physicochemical properties of the substrate and environmental characteristics differed among sites. Both seedlings and adults had EM in all three sites. The frequency of six-month-old seedlings with EM (40%) and their colonization values (<12%) were significantly lower in both tephra-affected sites than in the Non-affected site (100% and 80 %, respectively). However, all the 18-month-old seedlings from the tephra-affected sites had EM and their colonization increased almost to the value of the seedlings from the Non-Affected site. In both tephra-affected sites N. pumilio seedlings were associated with some exclusive fungal species, which could have a primary successional role. The early, increasing EM colonization recorded in seedlings after the eruption supports the idea of the strong dependence of Nothofagus trees on this symbioses, and highlights that this mutualism could be an effective adaptive mechanism under stressful conditions. Our findings also suggest that EM symbiosis in N. pumilio persists even after a severe disturbance and is regulated by several factors such as time after eruption, availability and type of mycorrhizal inoculum, plant development and physicochemical substrate composition. © 2020 Elsevier B.V.
英文关键词	Catastrophic events; Ectomycorrhizal behavior; Fungal richness and diversity; Nothofagus pumilio; Regeneration and growth; Tephra; Volcanic eruption
语种	英语
scopus关键词	Deposition; Ecosystems; Fungi; Physicochemical properties; Volcanoes; Ectomycorrhizal fungi; Environmental characteristic; Environmental factors; Forest environments; Forest regeneration; Natural regeneration; Nothofagus species; Substrate composition; Reforestation; colonization; ecosystem dynamics; mutualism; mycorrhiza; physicochemical property; seedling emergence; substrate; symbiosis; tephra; Deposition; Ecosystems; Fungi; Natural Reforestation; Nothofagus Pumilio; Seedlings; Sites; Trees; Los Rios [Chile]; Puyehue-Cordon Caulle; Southern Volcanic Zone; Fungi; Nothofagus; Nothofagus pumilio
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154919
作者单位	Laboratorio de Microbiología Aplicada y Biotecnología, Centro Regional Universitario Bariloche, Universidad Nacional del Comahue (UNCo) and Instituto Andino-Patagónico de Tecnologías Biológicas y Geoambientales (IPATEC-CONICET/UNCo), Quintral, Bariloche, 1250, Argentina; Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural (IRNAD), Universidad Nacional de Río Negro-CONICET, John O'Connor 181, Bariloche, Argentina; Laboratorio de tefrocronología y limnogeología (IPATEC), CONICET/UNCo, Av. de los Pioneros 2350, S. C. de Bariloche, 8400, Argentina
推荐引用方式 GB/T 7714	Moguilevsky D.,Fernández N.V.,Puntieri J.G.,et al. Surviving after an eruption: Ecosystem dynamics and mycorrhizae in Nothofagus pumilio forests affected by the 2011 Puyehue Cordón-Caulle tephra[J],2021,479.
APA	Moguilevsky D.,Fernández N.V.,Puntieri J.G.,Outes V.,&Fontenla S.B..(2021).Surviving after an eruption: Ecosystem dynamics and mycorrhizae in Nothofagus pumilio forests affected by the 2011 Puyehue Cordón-Caulle tephra.Forest Ecology and Management,479.
MLA	Moguilevsky D.,et al."Surviving after an eruption: Ecosystem dynamics and mycorrhizae in Nothofagus pumilio forests affected by the 2011 Puyehue Cordón-Caulle tephra".Forest Ecology and Management 479(2021).