| Guizhou Province,as one of the typical concentrated distribution regions of karst landforms in China,belongs to the subtropical humid climate with remarkable climatic characteristics and many typical vegetation types.It is one of the regions with the highest proportion of bryophyte richness in China.Guiyang city’s main source of water type,rain is a natural area within the territory of more than 10 km river in 98,the existing 17 urban wetland park,three representative of guiyang city wetland park(view mountain lake park,ten mile river wetland park,the aha lake national wetland park)riverside area in 145 samples,510 bryophyte specimens were studied,the results are as follows:1.Study the dominant families,genera,species and life forms of bryophytes in three wetland parks.There were 43 species of bryophytes belonging to 21 genera and 13 families.There are 5types of life forms,which are interwoven type,flat type,cluster type,fan type,and tile type,and interwoven type is the most,with a total of 28 species.There were 6 dominant families of bryophytes in the sample site,which were Peniclosaceae,Plusmosaceae,Pterymosaceae,Pterymosaceae,Pterymosaceae and Sericlosaceae.There are five dominant genera of bryophytes,which are Penetrum,Sericum,Plumum,Metorhynchus and Chrymosum.There were 10 dominant species,which were divided into three categories.2.Based on the analysis of the habitats of bryophyte community in the sample plot,the bryophytes in the sample plot were mainly native,followed by lithophytes,and a few were tree ophytes,accounting for 81.39%,53.49% and 41.86% of the total,respectively.The native bryophyte is the most abundant and is the main substrate for the growth of bryophytes.According to the statistics of occurrence frequency,the common bryophyte species in the native environment are.The most common plant species in the lithophytic environment are moss,moss yunnanensis,moss dangling,moss brachycephalus,etc.The common bryophytes on the arboreal substrates include sericum obtuse,sericum limestone,sericum synclade,sericum octodonatum,etc.The bryophyte life forms were the most abundant in the range of 1m to 5m near water,with a total of five species,and the number of each life form was more than that of the other three.The bryophyte species in the three substrates were also more than that in the range near water.3.The correlation between different ornamental factors and environmental factors on bryophyte diversity was analyzed.The results showed that bryophyte community area was positively correlated with bryophyte community diversity(P=0.377,significance =0.000).There was a significant positive correlation between bryophyte community thickness and bryophyte community diversity(P=0.192,significance =0.021).There was no significant negative correlation between bryophyte community purity and bryophyte community diversity(P=-0.073,significance =0.382).Soil moisture was positively correlated with bryophyte community diversity(P=0.235,significance=0.000).The degree of human disturbance was negatively correlated with the diversity of bryophyte community(P=-0.089,significance =0.038).There was no significant positive correlation between canopy density and bryophyte community diversity(P=0.031,significance =0.473).4.Through the color analysis of 43 bryophytes in the sample plot,it was concluded that 69.76%of the bryophytes in the sample plot belonged to yellow-green color,including 30 species.69.76% of the bryophytes in the sample land were concentrated in the range of medium saturation to high intensity saturation,and the overall saturation was relatively good.5.Through the diversity index calculation of the three wetland parks and different distances from the water,it is concluded that Aha Lake National Wetland Park has the highest diversity and evenness among the three parks,followed by Guanshan Lake Park and Shilihetan Wetland Park.In the three wetland parks,the bryophyte diversity within 1m-5m and 5m-10 m from water is generally higher than that within 1m and 10m-20 m from water,which is more suitable for the growth of bryophytes.The bryophyte diversity within 1m and 10m-15 m from water is lower than that in other areas.6.According to the characteristics of the wetland park bryophyte community,the landscape value of the bryophyte community was evaluated by the six indicators of community area,color,purity,artistic beauty,retention,and coordination with the surrounding environment.A structural model of landscape evaluation hierarchy for bryophyte community in Guiyang Wetland Park was established,and the evaluation weights of these six indicators were determined by calculating the weight scores of different environmental factors,and 40 representative bryophyte communities with good landscape effect were selected from 145 sample plots.By calculating the comprehensive evaluation weight score that can be used to reflect their ornamental value,the most valuable bryophytes for landscape utilization in Guiyang Wetland Park were screened out.Among them,there were 25 bryophyte community landscapes of class I and class II,accounting for 62.5% of the total evaluation sample land.The results showed that the overall landscape level of bryophyte community in the waterfront area of Guiyang City Wetland Park was above the medium level.The model can be used to evaluate the landscape of bryophyte community scientifically and objectively. |
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