INVESTIGADORES
LONGO maria silvana
capítulos de libros
Título:
Latitudinal Distribution of Mycorrhizal Types in Native and Alien Trees in Montane Ecosystems from Southern South America
Autor/es:
URCELAY, CARLOS; TECCO, PAULA; BORDA, VALENTINA; LONGO, SILVANA
Libro:
Mycorrhizal Fungi in South America
Editorial:
Springer, Cham
Referencias:
Año: 2019; p. 29 - 48
Resumen:
Biological invasions constitute a global environmental threat that rapidly altersnatural communities and ecosystem functioning. A way to understand thesuccess of alien trees in novel ecosystems is by comparing their ecologicalstrategies with those of natives. Plants often associate with mycorrhizal fungiin their roots to enhance nutrient acquisition. According to fungal identity,morphological structures and functioning, different types of mycorrhizas canbe distinguished. Despite the phylogenetic imprints that often characterizemycorrhizal distribution among plants, it is well known that mycorrhizal typesvary across environmental gradients, vegetation types and plant life forms.Then, at the global scale, the different types of mycorrhizas are not randomlydistributed across biomes but rather related to environmental variables. Inthis chapter we examine the patterns of mycorrhizal distribution in nativeand alien tree species occurring in contrasting montane ecosystems acrossa broad latitudinal gradient in South America. We analyze whether patternsof mycorrhizal distribution in alien trees tend to converge or diverge withthose in observed in natives. From the analyses we conclude that patternsof mycorrhizal distribution in alien and native trees occurring in montaneecosystems from subtropical to temperate regions, roughly follow thosepredicted by models of mycorrhizal distribution at global scales. This isseemingly in line with the idea of broad scale environmental filters drivingpredominance of convergences in the functional strategies of coexisting treespecies along these mountain biomes. Nonetheless, ECM in aliens is in higherproportion compared to natives, particularly in temperate forests. Results ofthis chapter suggest that mycorrhizal associations have an unambiguous role intree invasions in montane forests across different climates. However, they alsoreveal that the relative importance of each mycorrhizal type in each ecosystemremains to be determined.