scholarly journals Yeasts dominate soil fungal communities in three lowland Neotropical rainforests

2017 ◽  
Author(s):  
Micah Dunthorn ◽  
Håvard Kauserud ◽  
David Bass ◽  
Jordan Mayor ◽  
Frédéric Mahé
Keyword(s):  
South America ◽  
Central America ◽  
Forest Soils ◽  
Boreal Forests ◽  
Fungal Diversity ◽  
Tropical Rainforest ◽  
Soil Samples ◽  
Fungal Communities ◽  
Aquatic Environments ◽  
Biogeographic Pattern

ABSTRACTForest soils typically harbour a vast diversity of fungi, but are usually dominated by filamentous (hyphae-forming) taxa. Compared to temperate and boreal forests, though, we have limited knowledge about the fungal diversity in tropical rainforest soils. Here we show, by environmental metabarcoding of soil samples collected in three Neotropical rainforests, that Yeasts dominate the fungal communities in terms of the number of sequencing reads and OTUs. These unicellular forms are commonly found in aquatic environments, and their hyperdiversity may be the result of frequent inundation combined with numerous aquatic microenvironments in these rainforests. Other fungi that are frequent in aquatic environments, such as the abundant Chytridiomycotina, were also detected. While there was low similarity in OTU composition within and between the three rainforests, the fungal communities in Central America were more similar to each other than the communities in South America, reflecting a general biogeographic pattern also seen in animals, plants, and [email protected]

scholarly journals Are Wildfires a Threat to Fungi in European Pinus Forests? A Case Study of Boreal and Mediterranean Forests

Forests ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 309 ◽  
Author(s):  
Iván Franco-Manchón ◽  
Kauko Salo ◽  
Juan Oria-de-Rueda ◽  
José Bonet ◽  
Pablo Martín-Pinto
Keyword(s):  
Boreal Forests ◽  
Fungal Diversity ◽  
Community Dynamics ◽  
Forest Products ◽  
Climatic Conditions ◽  
Fungal Communities ◽  
Mediterranean Forests ◽  
Natural Forests ◽  
Edible Fungi ◽  
Pinus Species

Natural forests and plantations of Pinus are ecologically and economically important worldwide, producing an array of goods and services, including the provision of non-wood forest products. Pinus species play an important role in Mediterranean and boreal forests. Although Pinus species seem to show an ecological adaptation to recurrent wildfires, a new era of mega fires is predicted, owing to climate changes associated with global warming. As a consequence, fungal communities, which are key players in forest ecosystems, could be strongly affected by these wildfires. The aim of this study was to observe the fungal community dynamics, and particularly the edible fungi, in maritime (Pinus pinaster Ait.), austrian pine (Pinus nigra J.F. Arnold), and scots pine (Pinus sylvestris L.) forests growing under wet Mediterranean, dry Mediterranean, and boreal climatic conditions, respectively, by comparing the mushrooms produced in severely burned Pinus forests in each area. Sporocarps were collected during the main sampling campaigns in non-burned plots, and in burned plots one year and five years after fire. A total of 182 taxa, belonging to 81 genera, were collected from the sampled plots, indicating a high level of fungal diversity in these pine forests, independent of the climatic conditions. The composition of the fungal communities was strongly affected by wildfire. Mycorrhizal taxa were impacted more severely by wildfire than the saprotrophic taxa, particularly in boreal forests—no mycorrhizal taxa were observed in the year following fire in boreal forests. Based on our observations, it seems that fungal communities of boreal P. sylvestris forests are not as adapted to high-intensity fires as the Mediterranean fungal communities of P. nigra and P. pinaster forests. This will have an impact on reducing fungal diversity and potential incomes in rural economically depressed areas that depend on income from foraged edible fungi, one of the most important non-wood forest products.

scholarly journals Fungal diversity in high Andean ecuadorian forest soil

2021 ◽  
Author(s):  
Adrian Valdez ◽  
Sergio Covarrubias
Keyword(s):  
Fungal Diversity ◽  
High Performance ◽  
Its Region ◽  
Taxonomic Composition ◽  
Soil Samples ◽  
Fungal Communities ◽  
Gallery Forest ◽  
Volcanic Soils ◽  
Altitudinal Gradients ◽  
The Andes

The Andes range in Ecuador presents high biodiversity and characteristic altitudinal gradients, which are frequently threatened by deforestation and farming. In particular, forest have developed in the high inter-Andean alley on volcanic soils forming a unique ecoregion. Little is known on the fungal biodiversity of soil in such high Andean gallery forest submitted to strong degradation pressures. Therefore, in this study we evaluated wether the soil mycobiome was associated with altitudinal gradients during the dry season. Three representative locations were selected based on altitude: A (3,309 meters above the sea level, masl), B (3,809 masl) and C (4,409 masl). High performance sequencing (NGS) of the ITS region of ribosomal DNA genes with Illumina technology was used to explore the fungal taxonomic composition in the soil samples. Our results showed changes in the structure of fungal communities in the different locations, related to the relative abundance of Amplicon Sequence Variants (ASV). Higher fungal diversity was related with the altitudinal gradient with average taxa ranging from 675, 626 and 556 ASVs, respectively from location A to C. The results highlight the complexity and diversity of fungal communities in high Andean forest and the need to protect these unique mycobiomes. The findings in this ecosystem of Ecuador will improve our understanding of distribution, diversity, ecology, and biological perspectives for the restoration of terrestrial microbiomes.

scholarly journals Sheltering Role of Well-Decayed Conifer Logs for Forest Floor Fungi in Long-Term Polluted Boreal Forests

2021 ◽  
Vol 12 ◽  
Author(s):  
Vladimir S. Mikryukov ◽  
Olesya V. Dulya ◽  
Igor E. Bergman ◽  
Georgiy A. Lihodeevskiy ◽  
Anzhelika D. Loginova ◽  
...  
Keyword(s):  
Boreal Forests ◽  
Fungal Diversity ◽  
Woody Debris ◽  
Alpha Diversity ◽  
Forest Litter ◽  
Forest Degradation ◽  
Fungal Communities ◽  
Low Rank ◽  
Industrial Emissions

Coarse woody debris (CWD) provides food and shelter to a large proportion of forest biota and is considered vital for biodiversity during periods of harsh weather. However, its importance in long-term stressed ecosystems remains largely unknown. In this work, we explored the contribution of CWD to fungal diversity along the gradient of boreal forest degradation caused by 77 years of heavy industrial emissions. We analyzed the diversity and composition of fungi in 270 samples of well-decayed Picea abies and Abies sibirica logs, as well as forest litter both adjacent to and distant from the logs. Compared with forest litter, the wood had higher water content and possessed substantially lower concentrations of heavy metals, which suggests its potential favorability for biota in polluted areas. The pollution-induced loss of fungal diversity in forest litter reached 34% and was stronger in the microhabitats not influenced by CWD. Meanwhile, wood fungal communities lost less than 10% of their total richness and even increased in alpha diversity. These processes led to the diversity and compositional convergence of fungal communities from different microhabitats and substrates in polluted areas. Despite this, the importance of wood and CWD-influenced microhabitats for fungal diversity maintenance was low. Apart from wood-associated fungi, the taxa whose diversity increased in the wood of polluted areas were ectomycorrhizal fungi and eurytopic soil saprotrophs (Mucoromycota, Mortierellomycota, Eurotiomycetes, and Helotiales) that easily tolerate highly toxic litter. Within the majority of pollution-sensitive soil saprotrophic groups, only terricolous Tricholomataceae benefit from CWD as microrefugia. Upon considering the ecological variability within low-rank taxa, the importance of decayed logs as safe sites can be high for certain soil-inhabiting fungal groups in polluted areas.

scholarly journals Mirror image hydrocarbons from Tropical and Boreal forests

2006 ◽  
Vol 6 (5) ◽  
pp. 9583-9602
Author(s):  
J. Williams ◽  
N. Yassaa ◽  
S. Bartenbach ◽  
J. Lelieveld
Keyword(s):  
South America ◽  
Boreal Forest ◽  
Tropical Forest ◽  
Boreal Forests ◽  
Forest Ecosystems ◽  
Tropical Rainforest ◽  
Ambient Air ◽  
Mirror Image ◽  
Northern Europe ◽  
Large Excess

Abstract. Monoterpenes, emitted in large quantities by trees to attract pollinators and repel herbivores, can exist in mirror image forms called enantiomers. In this study such enantiomeric pairs have been measured in ambient air over extensive forest ecosystems in South America and northern Europe. For the dominant monoterpene, α-pinene, the (–)-form was measured in large excess over the (+)-form over the Tropical rainforest, whereas the reverse was observed over the Boreal forest. Interestingly, over the Tropical forest (–)-α-pinene did not correlate with its own enantiomer, but correlated well with isoprene. The results indicate a remarkable ecosystem scale enantiomeric fingerprint and a nexus between the biosphere and atmosphere.

scholarly journals Mirror image hydrocarbons from Tropical and Boreal forests

2007 ◽  
Vol 7 (3) ◽  
pp. 973-980 ◽  
Author(s):  
J. Williams ◽  
N. Yassaa ◽  
S. Bartenbach ◽  
J. Lelieveld
Keyword(s):  
South America ◽  
Boreal Forest ◽  
Tropical Forest ◽  
Boreal Forests ◽  
Forest Ecosystems ◽  
Tropical Rainforest ◽  
Ambient Air ◽  
Mirror Image ◽  
Northern Europe ◽  
Large Excess

Abstract. Monoterpenes, emitted in large quantities by trees to attract pollinators and repel herbivores, can exist in mirror image forms called enantiomers. In this study such enantiomeric pairs have been measured in ambient air over extensive forest ecosystems in South America and northern Europe. For the dominant monoterpene, α-pinene, the (−)-form was measured in large excess over the (+)-form over the Tropical rainforest, whereas the reverse was observed over the Boreal forest. Interestingly, over the Tropical forest (−)-α-pinene did not correlate with its own enantiomer, but correlated well with isoprene. The results indicate a remarkable ecosystem scale enantiomeric fingerprint and a nexus between the biosphere and atmosphere.

Microfungal community structure from forest soils in southern Quebec, using discriminant function and factor analysis

1986 ◽  
Vol 64 (7) ◽  
pp. 1402-1412 ◽  
Author(s):  
Paul Widden
Keyword(s):  
Factor Analysis ◽  
Community Structure ◽  
Discriminant Analysis ◽  
Forest Soil ◽  
Forest Soils ◽  
Deciduous Forest ◽  
Soil Samples ◽  
Fungal Communities ◽  
Fungal Isolation ◽  
Pine Forest Soil

Fungal isolation data, from four forest soils, were analyzed using both discriminant analysis and factor analysis, to investigate the structure of fungal communities. The analyses indicated that the forest of origin was a major factor determining fungal community structure in these soils. Discriminant analysis separated the fungal communities of coniferous-forest soil samples from those of deciduous-forest soil samples. The pine-forest soil, which was in an early stage of invasion by hardwoods, had a fungal community intermediate in structure between the extremes. Of the microfungi isolated, Botryotrichum piluliferum, Farrowia seminuda, Geomyces pannorus, Mucor hiemalis, Penicillium janthinellum, Trichoderma polysporum, and Zygorrhynchus moelleri were associated with the coniferous sites, whereas an Acremonium species, Gliomastix murorum, Paecilomyces carneus, Pae. fumosoroseus, Penicillium spinulosum, and Pen. thomii characterized the deciduous-forest soils. Many pine-forest soil fungi were species abundant in the other soils, a possible reflection of the successional stage of the forest. Both factor analysis and discriminant analysis yielded similar interpretations of the data and indicated the importance of fungal interactions in determining community structure. The discriminant analyses also showed that fungal isolation data gave a better separation between the soils of the four forests than did abiotic data.

Rubiacearum Americanarum Magna Hama Pars XLVI: New Species and Taxonomic Changes in Faramea of Central and South America (Rubiaceae, Coussareeae)

2020 ◽  
Vol 28 (2) ◽  
pp. 108-142
Author(s):  
Charlotte M. Taylor ◽  
Jomar G. Jardim
Keyword(s):  
New Species ◽  
South America ◽  
Central America ◽  
New Taxa ◽  
New Subspecies ◽  
Taxonomic Changes ◽  
New Nomenclatural Combinations

Review of specimens and names of Faramea Aubl. (Rubiaceae, Coussareeae) has required new nomenclatural combinations, clarified the identities of some previously described species, and discovered some new taxa. Here we transfer two Faramea names, F. suaveolens Duchass. and F. panurensis Müll. Arg., to Coussarea Aubl.; review the identities of F. cuencana Standl., F. multiflora A. Rich., F. oblongifolia Standl., F. parvibractea Steyerm., F. spathacea Müll. Arg. ex Standl., and F. suerrensis (Donn. Sm.) Donn. Sm.; lectotypify F. multiflora and F. panurensis; transfer to Faramea and lectotypify Rudgea scandens K. Krause; and describe 13 new species and two new subspecies: F. camposiana C. M. Taylor of Ecuador and Peru, F. foreroana C. M. Taylor of Colombia, F. fosteri C. M. Taylor of western South America, F. galerasana C. M. Taylor of Ecuador, F. grayumiana C. M. Taylor of Central America, F. kampauicola C. M. Taylor of Ecuador and Peru, F. neilliana C. M. Taylor of western South America, F. premontana C. M. Taylor of Ecuador, F. quijosana C. M. Taylor of Ecuador, F. ramosiana C. M. Taylor of Colombia, F. reyneliana C. M. Taylor of Peru, F. stoneana C. M. Taylor with two subspecies from Central and western South America, F. suerrensis subsp. miryamiae C. M. Taylor from Colombia, and F. vernicosa C. M. Taylor of Ecuador and Peru.

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