Soil mycobiota under managed and unmanaged forests of <i>Nothofagus pumilio</i> in Tierra del Fuego, Argentina

Abstract

Background: Management practices can modify the productivity of forests and the associated microbial diversity of soil. The soil mycobiota is considered a key factor in the ecological functions of forests. Forests of Nothofagus pumilio (Poepp. &amp; Endl.) Krasser (Nothofagaceae) are the main source of timber and one of the most important economic resources in the province of Tierra del Fuego (Argentina). However, there is no information on the impact of forest management interventions for the soil mycobiota, which can be reliable biological indicators of disturbance.Methods: Fungi were isolated from samples of soil collected under several Nothofagus pumilio forests subjected to different types of management and periods of time since the intervention. Types of management were represented by harvested forest with a shelter wood cutting, stockpile area and control forest without intervention and the periods of time since intervention were 1, 5–10 and 50 years. Species richness, evenness and Shannon’s diversity index of the mycobiota in each condition of management were calculated. Additionally, the effect of seasonality was analysed.Results: The soil mycobiota was represented by 70 taxa. Richness and/or Shannon’s diversity index of the mycobiota between undisturbed forest and stockpile area were higher in May (autumn) than in September or November. There were no differences in mycobiota diversity between dates in the harvested forest.Conclusions: Our results indicate that the forest intervention per se did not negatively affect the soil culturable mycobiota composition of N. pumilio forests in Tierra del Fuego (Argentina).

Synergy in mixed Nothofagus spp. plantations: the effect of deciduous/evergreen neighbourhood on tree growth in the Chilean Andes

“…During the growing season the facilitation of N. dombeyi towards N. alpina is not explained by its evergreen character, since N. alpina is also leafed, but likely because of its higher growth rates that generate a partial shade upon N. alpina seedlings or trees that favours the growth of the later (Donoso et al 2011). The higher growth and very high foliar area of N. dombeyi allows less direct light (radiation), lower range of temperatures and greater relative humidity, where temperatures and evapotranspiration are greater than in south aspects in the southern hemisphere in the Finally, there might be also other complex ecological interactions (Elíades et al 2019), such as mycorrhizal or entomological synergies. These issues deserve further ecological studies.…”

Qualitative and Quantitative Composition of Mycoflora of Gray Forest Soil Under Different Directions of Agricultural Land Use

“…та якісний склад ґрунтової мікробіоти відображає ступінь антропогенного на них навантаження, тому використовується як діагностичний показник[1,2].Ґрунтові гриби є важливою частиною ґрунтової мікробіоти, тому їх визначення і розуміння того, як вони працюють, має вирішальне значення для розробки стратегій підтримки продуктивності сільськогосподарських угідь різного типу використання та зниження процесу деградації ґрунту. Із інтенсифікацією галузі сільськогосподарського виробництва, активним використанням хімічних пестицидів, порушенням або ігноруванням сівозмін відбувається порушення мікробного балансу в ґрунті.Аналіз останніх досліджень.…”