气候变化领域集成服务门户(CCPortal): Sapwood-inhabiting mycobiota and Nothofagus tree mortality in Patagonia: Diversity patterns according to tree species, plant compartment and health condition

CCPortal

DOI	10.1016/j.foreco.2020.117997
	Sapwood-inhabiting mycobiota and Nothofagus tree mortality in Patagonia: Diversity patterns according to tree species, plant compartment and health condition
	Molina L.; Rajchenberg M.; de Errasti A.; Aime M.C.; Pildain M.B.
发表日期	2020
ISSN	0378-1127
卷号	462
英文摘要	Temperate forests ecosystems are threatened by declines and diseases worldwide. Causes have been investigated during the last decades allowing, in some cases, to relate such deterioration to climate change or pathogens but, in many cases, causes have not yet been elucidated. In recent decades, a phenomenon of grouped mortality, whose etiology remains unknown, has been observed in the two most distributed Nothofagus species of North Patagonian forests. This study aimed to assess sapwood-inhabiting fungal diversity of N. dombeyi and N. pumilio trees in healthy and affected stands in order to determine whether health condition shape these fungal communities, to characterize such patterns and, to seek for the likely pathogens associated with tree damage. Seven sites in Los Alerces National Park (Chubut, Argentina), were sampled seasonally for two years. Eighty-eight fungal taxa were recovered and identified. Spatial heterogeneity across plant compartments was found, involving community composition and structure, with stem harbouring greater diversity than root. It was found that the sapwood in both Nothofagus species was inhabited by different fungal species, in high richness and showing different patterns according to health condition and plant compartment. Health condition was a stronger driver of N. dombeyi sapwood-inhabiting fungal community than it was for N. pumilio; the latter evidenced plant compartment as a stronger driver of such community. Nothofagus pumilio presented higher frequency of decomposition agents in both affected and healthy trees than it was in N. dombeyi, indicating a greater wood deterioration of its stands. More decomposition agents and potential pathogens have been found in symptomatic stands of N. dombeyi than in healthy stands, although their frequency patterns do not allow the inference of conclusions about the primary fungal agent causing tree mortality. Our findings suggest a secondary role of living-wood-inhabiting mycobiota in tree damage processes as an expression of tree stress caused by climatic factors. © 2020 Elsevier B.V.
英文关键词	Endophytes; Forest decline; Fungal community; Latent pathogens; Temperate forests; Water stress
语种	英语
scopus关键词	Climate change; Deterioration; Ecosystems; Fungi; Pathogens; Wood products; Endophytes; Forest decline; Fungal community; Temperate forests; Water stress; Forestry; climate change; community composition; community structure; endophyte; environmental factor; forest ecosystem; fungus; heterogeneity; mortality; pathogen; species diversity; temperate forest; tree; wood; Degradation; Ecosystems; Forestry; Fungi; Pathogens; Wood Products; Argentina; Chubut; Los Alerces National Park; Patagonia; Mycota; Nothofagus; Nothofagus dombeyi; 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/155374
作者单位	Forest Protection Area, Centro de Investigación y Extensión Forestal Andino Patagónico (CIEFAP), Ruta 259 Km 16.24, CC14 (9200), Esquel, Chubut, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina; Department of Botany & Plant Pathology, Purdue University, 915 W State St, West Lafayette, IN 47907, United States
推荐引用方式 GB/T 7714	Molina L.,Rajchenberg M.,de Errasti A.,et al. Sapwood-inhabiting mycobiota and Nothofagus tree mortality in Patagonia: Diversity patterns according to tree species, plant compartment and health condition[J],2020,462.
APA	Molina L.,Rajchenberg M.,de Errasti A.,Aime M.C.,&Pildain M.B..(2020).Sapwood-inhabiting mycobiota and Nothofagus tree mortality in Patagonia: Diversity patterns according to tree species, plant compartment and health condition.Forest Ecology and Management,462.
MLA	Molina L.,et al."Sapwood-inhabiting mycobiota and Nothofagus tree mortality in Patagonia: Diversity patterns according to tree species, plant compartment and health condition".Forest Ecology and Management 462(2020).