Mycolichenological portrait of alder forest: alpha diversity revealed in 1ha plot in the Samursky National Park (Republic of Dagestan, Russia)
- Author:
- Volobuev S.V., Ismailov A.B. & Ivanushenko Yu.Yu.
- Year:
- 2024
- Journal:
- South of Russia: ecology, development
- Pages:
- 19(3): 219–229
- Url:
- https://doi.org/10.18470/1992-1098-2024-3-21
Aim. Xylobiont fungi and lichens determine the sustainability of forest ecosystems, but
their species richness and taxonomic diversity depend on the forest type and the
degree of its disturbance. Alder forests, characterised by a specific set of ecological
conditions, represent poorly studied habitats in terms of myco‐ and lichenobiota. The
aim of this work was to determine the species composition of aphyllophoroid fungi and
epiphytic lichens on a 1 ha sample plot in a lowland floodplain forest dominated by
Alnus glutinosa in the Delta Samura area of the Samursky National Park.
The authors collected basidiomata of lignicolous fungi and lichen specimens on a
sample plot of 1 ha during field studies. The surveyed forest area is represented by a
community dominated by Alnus glutinosa and lianas. The material was identified using
light microscopy techniques and a standard set of chemical reactions.
Thirty‐three species of aphyllophoroid fungi (Basidiomycota) and 53 species of lichens
and allied fungi (Ascomycota) were identified. Among them, 16 species (48 %) of
aphyllophoroid fungi were recorded for the first time for the Samursky National Park,
including six species revealed for the first time for the Republic of Dagestan, of which
three species (Donkia pulcherrima, Phanerochaete cumulodentata and Sertulicium
granuliferum) were new to the Northern Caucasus. Lichen species Arthothelium
ruanum, Bacidia arceutina and Graphis pulverulenta are listed for the first time for the
Republic of Dagestan. At the same time, 21 species of lichenized fungi were recorded
for the first time on Alnus glutinosa within the region.
The taxonomical structure of aphyllophoroid fungi revealed reflects the spring period
of basidiomata‐based field study. The predominance of corticioid fungi and revealing
hydnoid species among morphological groups may be indicative of the generally wetter
habitats of alder forests in comparison to other forest types distributed in the studied
area. Most of species were recorded on dead wood of Alnus glutinosa as the main
forest‐forming tree. At the same time, each of other substrates (Carpinus betulus and
Corylus avellana) turned out to be the habitat of species new to the region. The group
of fungal species developing on large‐scale substrate units, represented by fallen
trunks, was the most prevalent and is to be considered as more vulnarable in a case of
anthropogenical habitat disturbance. The majority of epiphytic lichens discovered on
alder are not specific to this woody substrate, except for single findings. These species
belong to epiphytes inhabiting the Samur forest, the core of the lichenobiota of which
is composed of thermophilous lichens of lowland deciduous forests. In our opinion, the
relict character of the forest, which is an isolated and rather small forest massif with
relatively homogeneous climatic conditions, causes a high similarity between the
species composition of lichens revealed in the surveyed sample plot with Alnus
glutinosa and previously studied plots dominated by Carpinus betulus, Populus alba,
and Quercus robur.
Key Words: Ascomycota, Basidiomycota, black alder forest, East Caucasus, epiphytic lichens,
inventory, protected nature area, polypores, corticioid fungi, xylobionts, Donkia
pulcherrima.
- Id:
- 36948
- Submitter:
- zpalice
- Post_time:
- Wednesday, 23 October 2024 11:01