High-performance proton exchange membrane fuel cell with ultra-low loading Pt on vertically aligned carbon nanotubes as integrated catalyst layer

Reducing a Pt loading with improved power output and durability is essential to promote the large-scale application of proton exchange membrane fuel cells(PEMFCs).To achieve this goal,constructing optimized structure of catalyst layers with efficient mass transportation channels plays a vital role.Herein,PEMFCs with order-structured cathodic electrodes were fabricated by depositing Pt nanoparticles by Ebeam onto vertically aligned carbon nanotubes(VACNTs)growth on Al foil via plasma-enhanced chemical vapor deposition.Results demonstrate that the proportion of hydrophilic Pt-deposited region along VACNTs and residual hydrophobic region of VANCTs without Pt strongly influences the cell performance,in particular at high current densities.When Pt nanoparticles deposit on the top depth of around 600 nm on VACNTs with a length of 4.6μm,the cell shows the highest performance,compared with others with various lengths of VACNTs.It delivers a maximum power output of 1.61 W cm^(-2)(H_(2)/O_(2),150 k Pa)and 0.79 W cm^(-2)(H_(2)/Air,150 k Pa)at Pt loading of 50μg cm^(-2),exceeding most of previously reported PEMFCs with Pt loading of<100μg cm^(-2).Even though the Pt loading is down to 30μg cm^(-2)(1.36 W cm^(-2)),the performance is also better than 100μg cm^(-2)(1.24 W cm^(-2))of commercial Pt/C,and presents better stability.This excellent performance is critical attributed to the ordered hydrophobic region providing sufficient mass passages to facilitate the fast water drainage at high current densities.This work gives a new understanding for oxygen reduction reaction occurred in VACNTs-based ordered electrodes,demonstrating the most possibility to achieve a substantial reduction in Pt loading<100μg cm^(-2) without sacrificing in performance.

The Effect of Injected Air Bubble Size on the Thermal Performance of a Vertical Shell and Helical Coiled Tube Heat Exchanger

In the present study,the effect of injecting air bubble size on the thermal performance of a vertical counter-current shell and coiled tube heat exchanger is experimentally investigated.The experiments were accomplished in a cylindrical shape heat exchanger with a 50 cm height and 15 cm outer diameter.Copper coil with 3.939 m equivalent length and 0.6 cm outer diameter was used to carry the hot fluid(water).Four different cold fluid(shell side)flow rates(Q_(s)=2;4;6 and 8 LPM)Þunder laminar flow conditions(316≤Re≤1223),constant hot(coil side)flow rate fluid rates(Q_(h)=1 LPM),four different injected air flow rates(Q_(a)=0:5;1;1:5 and 2 LPM),invariant temperature difference(ΔT=20°C),and constant bubble’s number(1400)were tested.To demonstrate the effect of bubble size,a sparger with orifice diameters of 0.1,0.8,and 1.5 mm was manufactured and used in the study.The overall heat transfer coefficient(U),NTU,effectiveness,and pressure loss were invested.The experimental results clearly showed that the heat exchanger’s thermal efficiency significantly improved with increasing the shell side flow rate and the injected air flow rate.The maximum improvement in U,NTU,and effectiveness was 153%,153%,and 68%,respectively.The thermal performance of the heat exchanger was shown to be improved with increasing the bubble size.Although the latter finding agrees with recent CFD published results,more studies need to be confirmed.

Vertical Distribution of Momentum Exchange Coefficient and Sediment Concentration in Estuarine and Coastal Waters

Vertical structures of momentum exchange coefficient and sediment concentration are the keys in the research on es- tuarine and coastal suspended sediment transport. Based on the parabolic mixing length distribution pattern, the distribu- tion pattern of vertical momentum exchange coefficient which is suitable for estuarine and coastal waters is constructed. A compari^n with steady flow and measured momentum exchange coefficient during one tidal cycle in the Menai Strait of England shows that the result of this pattern is closer to the measured values than those of commonly used Rouse＇ s and van Rijn＇s patterns, and the pattern is also suitable for estuarine and coastal waters. Successively, based on the precon- dition that momentum exchange coefficient is equivalent to sediment turbulent diffusion coefficient, and combining with the Diffusion Theory, we obtain the exponential vertical distribution pattern of sediment concentration, which is also suitable for estuafine and coastal waters, Thereby, using measured vertical stratified sediment concentration data of the South and the North Passages of the Yangtze Estuary and Zhoushan archipelago waters for fitting calculation, and comparing the results with those from Rouse＇s （1938） and Zhang et al. ＇s （1989） formulas, the results show that the exponential vertical distribution pattern of sediment concentration obtained in the present study not only overcomes the defect of Rouse＇s formula that the surface sediment concentration will be 0, but also has a holistic higher precision along the vertical lines than those of Rouse＇s and Zhang et al. ＇s formulas.

Numerical simulation on heat transfer performance of vertical U-tube with different borehole fill materials

Heat exchange performance of vertical U-tube heat exchanger was studied with two different borehole fill materials and CFD software. Borehole surface temperature and water temperature distribution were simulated on the condition of continuous operation for 8 h in winter with inlet water temperature being 10℃. The results show that there is no obvious difference on heat exchanger performance between the two different borehole fill materials.

竖插翅片微通道换热器空气侧积灰特性研究

竖插翅片微通道换热器表面积尘导致其长效性能衰减。文章建立了颗粒物沉积仿真模型,研究了竖插翅片表面积灰分布特性及其对换热器性能的影响。结果表明,积灰分布特性受颗粒物粒径和空气流速的显著影响:小粒径颗粒物主要沉积在翅片迎风面的百叶窗区域,而大粒径颗粒物则沉积在背风面。沉积率随粒径增加先增加后减小,峰值为粒径10μm。小粒径颗粒物沉积率随空气流速增大而增加,大粒径颗粒物沉积率则先增大后减小。积灰厚度的增加导致Nu下降,f因子增加以及性能评价因子(PEC)减小。当Re=1100时,0.15mm积灰厚度使Nu降低了4.0%,f增加了61.6%,PEC减少了18.2%。研究结果为竖插翅片换热器的长效性能提升提供了理论依据。

Fe-Beta zeolite for selective catalytic reduction of NO_x with NH_3:Influence of Fe content

Fe doped Beta zeolite with different Fe contents were prepared by ion exchange by changing the volume or the concentration of a Fe salt solution. For a particular mass of Fe salt precursor, the concentration of the metal salt solution during ion exchange influenced the ion exchange capacity of Fe, and resulted in different activities of the Fe-Beta catalyst. Fe-Beta catalysts with the Fe contents of （2.6, 6.3 and 9） wt% were synthesized using different amounts of 0.02 mol/L Fe salt solution. These catalysts were studied by various characterization techniques and their NH3-SCR activities were evaluated. The Fe-Beta catalyst with the Fe content of 6.3 wt% exhibited the highest activity, with a temperature range of 202-616℃ where the NOx conversion was 〉 80%. The Fe content in Beta zeolite did not influence the structure of Beta zeolite and valence state of Fe. Compared with the Fe-Beta catalysts with low Fe content （2.6 wt%）, Fe-Beta catalysts with 6.3 wt% Fe content possessed more isolated Fe3. active sites which led to its higher NH3-SCR activity. A high capacity for NH3 and NO adsorption, and a high activity for NO oxidation also contributed to the high NH3-SCR activity of the Fe-Beta catalyst with 6.3 wt%. However, when the Fe content was further increased to 9.0 wt%, the amount of FexOy nanoparticles increased while the amount of isolated Fe3＋ active sites was unchanged, which promoted NH3 oxidation and decreased the NH3-SCR activity at high temperature.

Model and Practice of Vertical Greening in Nanchang City

Vertical greening is a new model to broaden urban green space in Nanchang City. Baded on the narration of the concept of vertical greening, all kinds of ways to carry out the vertical greening in Nanchang, as well as the available patterns, were explored by combining with the natural climatic conditions in Nanchang City, and then the current commonly used vertical greening plant varieties as well as their application value were introduced, which provided a new way of thinking for urban greening of Nanchang City.

波纹和百叶窗竖插翅片微通道换热器在干/霜工况下的性能对比

文章研究了不同翅片间距的竖插波纹和百叶窗翅片微通道换热器在干工况和结霜工况下的换热性能,并对比分析了其排水性能。结果表明,百叶窗片换热器在传热性能上优于波纹片,但空气侧流动阻力较大,综合性能上波纹片略显劣势。相同翅片类型下,片距较小的换热器传热性能更好,但空气侧流动阻力略差,综合性能更优。风速对结霜工况下的性能影响显著,较高风速提高了换热器的最大能力和积分能力,但也加速了结霜和增加了结霜量。不同翅片类型和间距的换热器在相同风速下表现差异较大,因此设计和选择时需综合考虑风速、翅片类型和间距,以优化HVAC系统性能。在排水性能方面,百叶窗竖插换热器在化霜过程中残水量(142.7g)较多,排水时间(195.9s)较长,可能导致下周期结霜加速;而波纹竖插换热器排水性能较好,残水量(114.7g)少,排水时间(107.4s)短。因此,波纹片的化霜周期可设定得比百叶窗片短。设计和选择微通道换热器时需综合考虑残水量和排水时间,以优化性能和效率,特别是在需要频繁化霜的应用场景中,选择排水性能好的换热器可有效减少残水量,延长使用寿命,提高系统效率。

Seasonal variations of phosphorus species in the Tuohe River, China. Part Ⅰ. Sediments

Sediment cores were collected at an upstream site(Jintang) and a downstream site(Neijiang) in summer and winter in the Tuohe River, which is one of the five largest tributaries of the Changjiang(Yangtze) River in China. A sequential leaching procedure was applied to determine the concentrations of the different forms of solid phosphorus, including exchangeable phosphorus(Exc-P) as well as phosphorus associated with iron oxides(Fe-P), with aluminum oxides(Al-P), with apatite(Ca-P) and with the residual fraction(Res-P), as correlated with water content and total organic carbon. The seasonal variations and the vertical distributions of phosphorus species in sediments at both sampling sites demonstrated that: 1) total phosphorus(TP) in summer and winter were ranged between 1 313–2 330, 1 491–2 228 mg/kg in Jintang and 543–2 128, 603–1 175 mg/kg in Neijiang, respectively. It can predicated the pollution of TP in Jintang is serious than that in Neijiang both in summer and winter; 2) total inorganic phosphorus(TIP) was the dominant form of TP; 3) Ca-P was the main chemical forms of TIP in the sediments. Based on the profiles in sediments and bio-available phosphorus data, it revealed that bio-available phosphorus(BAP) represented only a minor portion(0.61%–3.59%) of TP, and the vertical distribution of soluble reactive phosphorus(SRP) in corresponding porewaters was more abundant in the upper layer of the sediment, which suggests that BAP may be converted to non-bioavailable phosphorus in deeper layer of the sediment of this dynamic system.

Application of Vertical Greening as a New Model of Expanding Urban Green Spaces

Vertical greening is a new pattern of expanding urban green spaces. Based on the concept of vertical greening, several approaches and available patterns were introduced for the vertical greening of urban spaces. Moreover, the mostly-applied vertical greening plants in China and their value were given to provide a new thought for urban greening.

A Highly Ordered Hydrophilic–Hydrophobic Janus Bi-Functional Layer with Ultralow Pt Loading and Fast Gas/Water Transport for Fuel Cells

One of the critical challenges that limit broad commercialization of proton exchange membrane fuel cells(PEMFC)is to reduce the usage of Pt while maintaining high power output and sufficient durability.Herein,a novel bifunctional layer consisting of vertically aligned carbon nanotubes(VACNTs)and nanoparticles of Pt-Co catalysts(Pt-Co/VACNTs)is reported for highperformance PEMFCs.Readily prepared by a two-step process,the Pt-Co/VACNTs layer with a hydrophilic catalyst-loaded side and a hydrophobic gas diffusion side enables a PTFE-free electrode structure with fully exposed catalyst active sites and superior gas–water diffusion capability.When tested in a PEMFC,the bi-functional Pt-Co/VACNTs layer with ultralow Pt loading(~65μgcathodecm-2)demonstrates a power density of 19.5 kW gPt cathode-1 at 0.6 V,more than seven times that of a cell with commercial Pt/C catalyst(2.7 kW gPt cathode-1 at 0.6 V)at a loading of 400μgcathodecm-2 tested under similar conditions.This remarkable design of VACNTs-based catalyst with dual functionalities enables much lower Pt loading,faster mass transport,and higher electrochemical performance and stability.Further,the preparation procedure can be easily scaled up for low-cost fabrication and commercialization.

A Study on Photosynthetic Physiological Characteristics of Six Rare and Endangered Species

The parameters of gas exchange and chlorophyl fluorescence in leaves of six rare and endangered species Neolitsea sericea, Cinnamomum japonicum var. cheni , Sinojackia microcarpa, Discocleidion glabrum var. trichocarpum, Parrotia sub-aequalis, Cercidiphyl um japonicum were measured in fields. The results showed that there were significant differences in photosynthetic capacity, intrinsic water use effi-ciency （WUEi ）, the efficiency of primary conversion of light energy of PSⅡ and its potential activity, the quantum yield of PSⅡ electron transport, and the potential ca-pacity of heat dissipation among the six species. However, there was no significant difference in WUE. The highest values of net photosynthetic rate （Pn）, transpiration rate （Tr） and stomatal conductance （gs） occurred in D. glabrum var. trichocarpum and the lowest in S. microcarpa. On the contrary, D. glabrum var. trichocarpum had the lowest WUE, intrinsic water use efficiency （WUEi ） and S. microcarpa had the highest. The results indicated that D. glabrum var. trichocarpum had higher photo-synthetic capacity and poorer WUE, while S. microcarpa had lower photosynthetic capacity and greater WUE. Furthermore, the mean values of maximal fluorescence （Fm）, potential efficiency of primary conversion of light energy of PSⅡ （Fv/Fm）,ΦPSⅡ, actual efficiency of primary conversion of light energy of PSⅡ （F′v/F′m） and non-photochemical quenching coefficient （NPQ） were the highest in S. micro-carpa, indicating that its PSⅡ had higher capacity of heat dissipation and could prevent photosynthetic apparatus from damage by excessive light energy. Correlation analysis showed that there were significant correlations among photosynthetic physi-ological parameters. However, the initial fluorescence （Fo） was not significantly cor-related with any other parameters. This study also revealed the extremely significant positive correlations between Pn and Tr, gs, apparent quantum yield （AQY）, be-tween Tr and gs, between light saturation point （LSP） and AQY, between Fv/Fm and Fm, between ΦPSⅡ and photochemical quenching coefficient （qp）, between Tr, gs and LSP, AQY. However, WUEi was significantly negatively correlated with Tr, gs, Pn, LSP and AQY.

Solution and its application of transient stream/groundwater model subjected to time-dependent vertical seepage

Based on the first linearized Boussincsq equation, the analytical solution of the transient groundwater model, which is used for describing phreatic flow in a semiinfinite aquifer bounded by a linear stream and subjected to time-dependent vertical seepage, is derived out by Laplace transform and the convolution integral. According to the mathematical characteristics of the solution, different methods for estimating aquifer parameters are constructed to satisfy different hydrological conditions. Then, tile equation for estimating water exchange between stream and aquifer is proposed, and a recursion equation or estimating the intensity of phreatic evaporation is also proposed. A phreatic aquifer stream system located in Huaibei Plain, Anhui Province, China, is taken as an example to demonstrate tile estimation process of the methods stated herein.

Fluoride Exposure Compromises Gas Exchange of Plants

Fluorine (F-) stands out for its phytotoxic potential, because it accumulates in plants, changes enzymes activity, reduces chlorophyll content and, consequently, affects growth and yield of crop plants. An experiment was conducted to evaluate the effects of F- on leaf gas exchange in coffee and sweet orange plants, compared to sensitive (gladiolus) and tolerant (ryegrass) reference species. Plants grown in pots were exposed to F- in a semi-open mist chamber. The experimental design was completely randomized with treatments defined by the combination of plant species and two intensities of exposure to atmospheric F, with nebulization of HF solutions (low = 0.065 mmol·m-3 and high = 0.260 mmol·m-3) in a mist chamber, as well as with non-exposed control samples. CO2 assimilation (A), transpiration (E), stomatal conductance (gs) and chlorophyll fluorescence rates were measured after 27 days of treatment application. The leaf gas exchange variables in ryegrass and orange plants did not vary in response to the increase in atmospheric F, while an increase in gs and E values was observed in gladiolus and coffee plants. A decrease in A and potential quantum efficiency of photosystem II (Fv/Fm) was found for gladiolus plants. On the contrary, an increase of A for coffee plants was associated with the apparent effect previously reported about the loss of leaf stomatal regulation related to the short assessment period of plants in this experiment. Damages caused to the photosynthetic system were reflected in the susceptibility of the evaluated species to the contamination by the element.

Plant Biodiversity and Structure of Robusta Coffee (Coffea canephora var. robusta) Agroforests in Cameroon

Agroforests are man-made ecosystems in which crops are associated with a main perennial species like Robusta Coffee Agroforests (RCAs), which is counted among the main modes of perennial crops production in Cameroon. Despite the rich ecosystem services provided, the diversity of Associated Species (AS) found in these RCAs and the structure of the landscapes they form remain little known in Cameroon. The current study aimed to inventory AS and characterize the structure of RCAs in four sites (Ayos, Malantouen, Melong and Nkongsamba) belonging to three robusta coffee production basins in Cameroon. A systematic inventory with dendrometric measurements of the wood AS and coffee trees was carried out on 120 one-hectare plot unit, i.e. 30 plots per site. The results showed that 102 AS belonging to 83 genera and 41 families were identified in these RCAs. The RCAs of Ayos in the dense rainforest zone with bimodal rainfall pattern were the most diverse with 71 species, followed by those of Melong and Nkongsamba with respectively 39 and 33 species respectively in the dense rainforest zone with monomodal rainfall pattern, and Malantouen with 33 species in the high savannahs of the west. Structurally, average coffee tree and AS densities founded ranged from 1208 - 1456 plants/ha and 71 - 214 stems/ha and those of basal area from 7.29 - 17.40 m2/ha for coffee trees and 7.97 - 16.14 m2/ha for AS in function of site. Basis on the vertical stratification, the proportion of the 3 - 6 m stratum, which is mainly represented by introduced AS, varied from 38% - 62% depending on the site. The results of this study showed that RCAs contribute to the conservation of plant biodiversity, given the specific richness identified in these ecosystems.

吉林省中西部地区灯下蛾类群落结构及多样性

为探明吉林省中西部地区蛾类昆虫的种类及组成,提供蛾类群落的多样性资料,本研究于2017年-2020年利用高空探照灯逐日诱集蛾类昆虫并分类,明确不同昆虫季节性种群动态,在此基础上对蛾类群落多样性进行分析。结果共采集、鉴定蛾类昆虫18科227种,优势科为夜蛾科,种数占比达到49.34%。按为害植物类别,可分为农业害虫、林业害虫、果树害虫、蔬菜害虫等。蛾类昆虫4月始见,7、8月群落丰富度最高,7月群落多样性最高,群落均匀性随时间变化不明显。明确了不同月份优势度指数较高的种类。7、8月的蛾类群落相似性高,4、10月与各月的相似性低。本研究结果可为此区域蛾类害虫的监测预警与综合治理提供基础理论依据。

青藏高原东北坡蚂蚁多样性

【目的】研究青藏高原东北坡不同海拔和植被类型下蚂蚁多样性,为该区生态恢复和物种多样性保护提供参考。【方法】采用样地调查法获取研究数据和蚂蚁标本,利用R语言4.1.1绘制物种累积曲线并计算α多样性指数和Jaccard相似性系数,用SPSS 24.0分析蚂蚁多样性指数与生境因子间的相关性。【结果】共观察蚂蚁23800头,鉴定为30种,隶属于2亚科13属。其中,优势种为草地铺道蚁[Tetramorium caespitum(Linnaeus)]和光亮黑蚁(Formica candida Smith)。在5个垂直带中,柳梢沟垂直带物种数最多(24种),物种多样性指数(2.4359)和均匀度指数(0.7665)最大,而优势度指数最小(0.1237);巴颜喀拉山垂直带物种数最少(2种),物种多样性指数(0.0099)和均匀度指数(0.0143)最小,优势度指数最大(0.9974)。各垂直带蚂蚁类群间的相似性系数为0.0000~0.5000,处于极不相似至中等相似水平。相关性分析发现,物种多样性指数与海拔呈极显著负相关,与坡度和灌木盖度呈显著正相关。【结论】青藏高原东北坡蚂蚁多样性主要与海拔、坡度和灌木盖度等生境因素有关。高海拔地区气候严寒,植被单一,不适合多数物种栖息;海拔高差大的垂直带环境温度范围较大,植被类型较丰富,适合更多的蚂蚁物种生存。各垂直带蚂蚁类群间的分化较显著,不同地段的类群能反映不同生境状况。

高黎贡山北段土壤中虫生真菌物种多样性及垂直分布特征

【目的】探讨高黎贡山北段虫生真菌的物种多样性及其在不同海拔的分布特征,为该区域虫生真菌资源的保护和利用奠定基础。【方法】在高黎贡山北段沿海拔梯度(1900~4300 m)采集土壤样品,分离虫生真菌菌株,根据菌株的形态特征和多基因系统发育分析进行物种鉴定;将样区划分为5个海拔梯度带(Ⅰ~Ⅴ),对虫生真菌的物种多样性及垂直分布特征进行分析。【结果】在高黎贡山北段土壤中共获得1135株虫生真菌,分属于4科7属19种;优势属为绿僵菌属(Metarhizium,8种816株)、白僵菌属(Beauveria,4种214株),优势种依次为棕色绿僵菌(M.brunneum)、球孢白僵菌(B.bassiana)和蝙蝠蛾鳞翅虫草(Samsoniella hepiali)。所有海拔梯度土壤中都有虫生真菌分布,随着海拔升高,虫生真菌的物种丰富度和菌株数量均呈下降趋势,但多样性指数呈增加趋势。中海拔梯度带(I)的虫生真菌物种丰富度(13种)和菌株数(265株)最高;最高海拔梯度带(Ⅴ)的物种丰富度(9种)和菌株数(139株)最低,Simpson多样性指数(0.576)、Shannon-Wiener多样性指数(1.272)和Pielou’s均匀度指数(0.579)最高,优势度(0.424)最低。【结论】高黎贡山北段土壤中虫生真菌资源丰富,广泛分布于所有海拔梯度中,中海拔区域的物种和菌株数量较多,高海拔区域的多样性指数较高。

Indian monsoon drove the dispersal of the thoracica group of Scytodes spitting spiders

We examined the global biogeography of the Scytodes thoracica group of spitting spiders based on 23 years of sampling at the species level(61 species in the thoracica group and 84 species of Scytodes)using DNA data from six loci.Our results indicated that the thoracica group initially dispersed from Southeast Asia to East Africa between 46.5 and 33.0 million years ago,and dispersal events intensified between Southeast/South Asia and East/South Africa from the early to late Miocene.The timing of these events indicates that Asian-African faunal exchange of the thoracica group was driven by the Indian monsoon,and the pattern of dispersal suggests that colonialization took root when the Indian monsoon shifted from a North-South direction to an East-West direction from the middle Eocene.

高黎贡山怒江沿线区域虫生真菌多样性及分布特征

[目的]探究高黎贡山怒江沿线区域虫生真菌物种多样性及其沿海拔梯度的分布特征,为该区域虫生真菌资源的开发、利用和保护提供科学依据。[方法]从怒江沿线高黎贡山南段的保山至北段的丙中洛区域(海拔800~1500 m)采集的土壤样品中分离虫生真菌菌株;采用形态学和多基因系统发育分析方法对虫生真菌进行物种鉴定,同时对虫生真菌的物种多样性及垂直分布特征进行分析。[结果]在高黎贡山怒江沿线区域共获得623株虫生真菌菌株,涵盖4科7属18种。其中,优势属为绿僵菌属(有9种,共398株)、白僵菌属(有3种,共133株),优势种依次为棕色绿僵菌和球孢白僵菌。所有海拔区段的土壤中均有虫生真菌分布,且虫生真菌的多样性指数呈现出随海拔升高逐渐降低的趋势。保山段(海拔800~900 m)虫生真菌的香农-威纳指数(1.8117)、辛普森指数(0.7758)、均匀度指数(0.7868)最高,优势度指数(0.2242)最低;贡山段(1400~1500 m)虫生真菌的香农-威纳指数(1.2079)、辛普森指数(0.5200)、均匀度指数(0.5037)最低,优势度指数(0.4800)最高。聚类分析结果显示,高黎贡山怒江沿线区域虫生真菌分为宽域分布物种和狭域分布物种。冗余分析(Redundancy analysis,RDA)表明,土壤湿度和土壤温度是影响高黎贡山怒江沿线虫生真菌多样性和属物种丰度的主要因子。[结论]高黎贡山怒江沿线土壤中虫生真菌物种多样性丰富,且具有一定的垂直分布特征,应加强对该区域虫生真菌物种资源的保护。