Studies On Macrofungi Diversity In Jianshan Nature Reserve,Wenxian County

Jianshan Nature Reserve is located in the transition area from subtropical to warm temperate zone in Gansu province,Wenxian county.The macrofungus resources are very rich in the reserve because of the dense forest coverage and the superior condition of water and heat.In these studies,the species diversity and floristic composition of macrofungi in Jianshan reserve were conducted by means of field investigation,classification and statistical analysis,then the macrofungi resource status was evaluated.From August 2018 to October 2019,9 sample plots were set up in Jianshan Nature Reserve to take field investigation and specimens collection.As a result,628specimens were obtained,among them,32 were identified to genus level only,and596 specimens were identified using morphological and molecular methods,351species were recorgnized,including 5 Classes,21 Orders,61 Families and 131Genera,and 134 species were the first records in Gansu.Then the macrofungus diversity catalogue was composed according to?Dictionary of the Fungi?10^th and the index fungorum system(http://www.indexfungorum.org/).The results of mycobiota diversity analysis showed that there were 13 dominant families,which were Psathyrellaceae,Entolomataceae,Hygrophoraceae,Inocybaceae,Strophariaceae,Russulaceae,Cortinariaceae,Agaricaceae,Marasmiaceae,Mycenaceae,Polyporaceae,Omphalotaceae,including 215 species,accounting for 61.25%of total species.There werer 22 dominant genera,for the Entoloma,Inocybe,Hygrocybe,Cortinarius,Psathyrella,Mycena,Gymnopus,Clitocybe,Lactarius,Helvella,Agrocybe,Amanita,Coprinellus,Crepidotus,Lepiota,Marasmius,Stropharia,Tricholoma,Russula,Coprinopsis,Laccaria and Suillus,include 202 species,accounting for 57.55%of total species.According to the floristic composition,135 genera were divided into 5 types:1)World-wide type,72 genera,53.33%of total genera;2)North-temperate distribution type,45 genera,33.33%of total genera;3)Pantropical distribution type,13 genera,9.63%of total genera;4)Tropical-subtropical distribution type,4 genera,2.96%of total genera;5)Endemic to China,1 genus,accounting for 0.74%of the total genera.The floristic composition of this area is complex and diverse,mainly composed of world-wide type,but also obvious north temperate distribution type,and some pan-tropical,tropical-subtropical distribution type.The existence of endemic to China indicated the reserve was very importance in ecosystem.Results of resource evaluations showed that there were 59 edible macrofungi,most of them belongs to Agaricaceae,Cortinariaceae,Strophariaceae,Tricholomataceae.There were 15 medicinal macrofungi,and 13 medicinal and edible macrofungi.The economic macrofungi in this reserve were abundant and the development prospect was considerable.Meanwhile,38 poisonous macrofungi were recorgnized,such as Russula emetica,Amanita subjunquillea,Amanita pallidorosea,Hypholoma fasciculare.The results proved the distribution of some macrofungi in Northwest China,and made the distribution data of macrofungi in China more accurate.It could also provide the basis for conservation and utilization of macrofungi resources in this reserve.