Agaricomycota (Mushroom) Occurrence Distribution and Species Abundance in Kogi State, Central Nigeria

Wuyep Ponchang Apollos, Victoria Ibukun Joshua, Hannatu Dawa Musa

Abstract


The diversity and distribution of mushroom-forming fungi of the three senatorial zones of Kogi state was studied. A multi-stage sampling technique was used to assess twelve randomly selected plots mapped out across the study area during the rainy and early dry seasons of 2014, 2015 and 2016. A total of eight-hundred and six (806) mushrooms species were collected and recorded during the three years of investigation of the study area. Three hundred and fifty (350) species were found in the eastern senatorial district, 143 species were found in the central senatorial district and 313 species were found in the western senatorial district of Kogi State. Out of these, 151genera and 32 families were identified. Kogi West had the highest (26) number of families and the lowest (15) number of families was observed in Kogi Central. Sixty eight (68) species and 14 families were common to all the districts. 6 morpho groups (Ascomycetes fungi, Boletoid and Polyporus fungi, Coral fungi, Gilled fungi, Cortinarius fungi, and Non-gilled fungi) occurred across the study area, the gilled-fungi being the most frequent, while the coral fungi had the least occurence. Also 13 stature types (Amanitoid, Armillarioid, Clitocyboid, Collybioid, Galerinoid, Lepiotoid, Mycenoid, Naucoriod, Omphaloid, Pleurotoid, Pluteotoid, Tricholomatoid, and Vaginatoid) were represented across the plots. Inventory of 112 fleshy and 25 hard mushrooms; 191 fleshy and 46 hard mushrooms; 352 fleshy and 80 hard mushrooms was carried out in year 2014, 2015 and 2016 respectively.

Two hundred and ninety-eight (298) mushrooms species were collected on wood, 471 on soil and 37 on leaves litter/humus. The mushroom compositional species diversity and richness were estimated and compared using Shannon-Weiner Index, Pielous Evenness Index, Margalefs Index of Species Richness and Simpson Concentration Index. The Shannon diversity index varied from a significantly lower index of 0.93 at Kogi Central to a significantly higher index of 1.75 at Kogi West (p=0.001). The evenness index varied from a significantly minimum 0.29 at Kogi central to a significantly maximum 0.51 at Kogi West (p=0.010). The species richness significantly varied between 4.56 in Kogi Central to 8.74 in Kogi West and 13.42 in Kogi East (p=0.001). The Simpson index significantly varied between 0.25 in Kogi West to 0.60 in Kogi Central which was the highest (p=0.003). Kogi East and Kogi West were the most similar (0.48) as revealed by the similarity index in terms of mushroom assemblage.


Keywords


Agaricomycota; Mushroom; Species abundance; Kogi State.

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