Effects of shrub species and microhabitats on dew formation in a revegetation-stabilized desert ecosystem in Shapotou, northern China

Dew is an important supplement water source in arid and semi-arid areas. In order to determine the dew formation on different kinds of soils associated with various shrub species and microhabitats, we performed measurement of accumulated dew formation amount and duration in October 2009 in a revegetation-stabilized arid desert ecosystem in Shapotou area, northern China. The results indicated that the accumulated dew formation amount was four times larger at open spaces as compared to under the canopy, and it was nearly twice as much under living Artemisia ordosica plants（L.A.） as compared to under living Caragana korshinskii plants（L.C.）. The opposite characteristics were found for dew duration between different microhabitats. Dew amounts at different vertical heights around the shrub stands were in the order of 50 cm above the canopy〉the canopy edge〉under the canopy. Dew amount continued to increase after dawn, and the proportion of average accumulated dew amount after dawn accounting for the average maximum amount increased from above the canopy to under the canopy. Dew formation duration after sunrise accounted for more than 50% of the total formation duration during the day time. Contrary to the distribution characteristics of dew amount, dew duration after dawn and total dew formation duration during the day time were both highest under the canopy, followed by at the canopy edge and then at 50 cm above the canopy. The portion of dew duration after dawn accounting for the total dew duration during the day time increased from above the canopy to under the canopy. From these results, we may conclude that dew availability as a supplemental water resource for improving the microhabitats in water-limited arid ecosystems is position dependent especially for the plant microhabitats at different stands layers.

Microhabitat Segregation of Parapatric Frogs in the Qinling Mountains

Coexistence mechanisms for species with similar ecological traits and overlapping geographic distributions are basic questions in ecology and evolutionary biology. Specific habitat requirements often limit distribution range as well as facilitate partitioning resource utilization in ecological similar species. Understanding niche segregation and differences in microhabitat utilization can contribute to identifying coexistence mechanisms between parapatric species. Feirana quadranus and F. taihangnica are two closely related frog species with parapatric geographic ranges and an elongated contact zone within the Qinling Mountains, which is an important watershed for East Asia. Here, we analysed the difference in microhabitat utilization between the two frog species and explored the key ecological factors that induced their microhabitat differentiation based on quadrats sampled in the contact zone. Our comparison of twenty environmental variables showed that both species used microhabitats with alkalescent warm water and gentle slope conditions. The principal component analysis indicated that climate-related variables, vegetation conditions, and river width were the important factors for microhabitat utilization of these species. These findings contribute to our understanding on the coexistence mechanisms of these two related and parapatric Asian mountain frog species. This study can also be helpful for identifying target habitats to conduct conservation actions and management strategies effectively in the face of environmental changes.

Ground-active arthropod responses to rainfall-induced dune microhabitats in a desertified steppe ecosystem,China

Different microhabitats along dune slope were found to affect the distribution of plant performances and soil properties in desertified ecosystems. However, the ground-active arthropod responses to rainfall-induced dune microhabitats were largely unknown in desertified regions. At dune top, midslope and bottom, ground-active arthropods were sampled by the method of pitfall traps in addition to the herbaceous and soil measurements during spring, summer and autumn from 2012 to 2013. Ground-active arthropod had a strong dynamics in time, seasonally and yearly in responses to rainfall-induced dune microhabitats and the variations were significant higher than those of soil and herbaceous properties. The abundance distribution of dominant taxa （i.e. Melolonthidae, Carabidae, Glaphyridae, Tenebrionidae and Formicidae families） among dune microhabitats was similar between seasons within the same year, whereas they differed markedly between two sampling years with varying rainfall patterns. A significant （P〈0.05） difference in total abundance, taxa richness and Shannon index among dune microhabitats was found only in certain season time, particularly in 2013; however, no significant （P〉0.05） differences were found among dune microhabitats when averaged on three sampling seasons within the year of either 2012 or 2013. In all, the taxonomical structure differed considerably from the community structure in ground-active arthropod response to rainfall-induced dune microhabitats. The spatial distribution of taxonomical groups among dune microhabitats was significantly affected by inter-annual rainfall changes, whereas that of community structure was affected by both intra- and inter-annual rainfall changes in desertified ecosystems.

Importance of microhabitat selection by birds for the early recruitment of endangered trees in a fragmented forest

Background:Remnant microhabitats are important for bird habitat selection and plant regeneration in the fragmented habitat.However,empirical information on the consequences of how microhabitat use by birds affects the early recruitment of plants is lacking.Methods:In this study,we evaluated whether microhabitat selection by the Black Bulbul(Hypsipetes leucocephalus)(J.F.Gmelin,1789)impacts the early recruitment of the endangered tree species,the Chinese Yew(Taxus chinensis(Pilger)Rehd),in a fragmented forest over a 4-year period(2011–2012,2018–2019).Results:Our results showed the main factors affecting H.leucocephalus microhabitat selection were distance to the nearest T.chinensis mature tree,herb cover and density,leaf litter cover,and vegetation type.Moreover,the results of logistic regression also highlighted the importance of elevation,distance to light gap and roads,tree cover in bird microhabitat selection.Furthermore,the seed emergence rate in microhabitats used by birds did not differ from the natural forest,which was related to five factors of bird microhabitat.The Random Forest model showed that seedling emergence rate was increased with leaf litter cover and distance to fallen dead trees,but decreased in relation to herb cover,slope,and elevation.Conclusion:Our results highlight the importance of remnant microhabitats in fragmented forests for sustaining forest ecology and optimal management.The contribution of microhabitats used by birds to plant recruitment provides insights into how frugivore species contribute to plant regeneration,which should be incorporated in future conservation and management practices of fragmented forests.

MICROHABITAT DISTRIBUTION OF METAZOAN PARASITES ON GILLS OF SILURUS ASOTUS IN JIANGKOU RESERVOIR, JIANGXI PROVINCE, CHINA

This paper deals with the proportional distribution, niche breadth and niche overlap of two metazoan parasites(copepods species, Ergasilus anchoratus Markewitsch, 1946 and Pseudergasilus parasiluri Yamaguti, 1936) and monogeneans (in the genus Silurodiscoides Gussev, 1976) found on gills of the fish, Silurus asotus L. from Jiangkou Reservoir in Jiangxi Province,China. E.anchoratus was the common and dominant metazoan parasite on gills of the fish in this locality as indicated by the higher infection levels, and distributed almost evenly on gill arches without any observed gill arch preference, as shown by the wide proportional distribution and broad niche breadth. P. parasiluri and monogeneans in Silurodiscoides were found also without any significant gill arch preference although they had a rather narrow niche breadth. The observed significant overlap between P. parasiluri and Silurodiscoides spp. may be simply due to the lower infection levels of the parasites. The observed pattern of unrestricted distributions of the parasitic copepods on gills of the fish may be accounted for, at least in part, by the moving ability of the copepods, and may also indicate that the parasite does not exhibit any feature of gill arch preference. However, further experimental research is needed to verify the microhabitat distribution of the parasites.

Microhabitat Use and Population Structure of a Chinese Kissing Loach, <i>Leptobotia tchangi</i>, in the North Tiaoxi River, China

Fundamental ecological information on the Chinese kissing loach (Leptobotia tchangi) was collected in the North Tiaoxi River, China, in September 2010. The length-frequency distribution calculated using FiSAT software showed the population structure of this kissing loach could be classified into four age groups suggesting that the life span of the loach should be 3 - 4 years. A stepwise multiple linear regression analysis revealed that the density of this kissing loach was significantly and positively correlated with water velocity, while the body size was significantly and positively correlated with river bed pebble size. It suggested that water velocity and variation of pebble size play important roles in the full life history of this kissing loach. Thus, maintenance of the rapid current and variety of substrate are essential for the conservation of this species under the present conditions in the river, which also can support river restoration being in harmony with survival of this kissing loach.

The behaviour of ^(59)Fe in marine microhabitat

Under the artificial condition the 59Fe morphology in sea water, its concentration in sediment and phytoplankton, its distribution and metabolism in tissue organs of marine animals were studied. The results showed that the morphology of 59Fe was in a particulate state in sea water. The adsorption rule of 59Fe by three kinds of sediments was similar. The concentration ability of 59Fe by phytoplankton was very strong. The critical concentration organs of S9Fe by marine animals were viscera. The gross radioactivity of 59Fe was mainly concentrated in protein. The concentration factor of 59Fe by DNA was the highest one. After excretion experiment, 59Fe of all the tissue organs was not detected. Small part of59Fe remained in the organic acid and protein state. There was a redistribution process in sediment for59Fe.

Shift in microhabitat use as a mechanism allowing the coexistence of victim and killer carnivore predators

It has been suggested that spatial heterogeneity is key to the coexistence at local spatial scales of subordinate and dominant predator species by allowing the former to shift to more protective habitats when the risk of intraguild predation exists. Here, we show how the smaller carnivore Egyptian mongoose (Herpestes ichneumon) may coexist on a local scale with its intraguild pre- dator, the Iberian lynx (Lynx pardinus), by using places with different microhabitat character- istics. We expect that mongooses living within lynx home ranges will use denser and more protective habitats when active in order to di- minish their risk of being killed by lynx com- pared to those living in areas similar in vege- tation and prey availability but where lynx are absent. The scrubland cover of points used by mongooses outside lynx areas, and that of points located within lynx areas but not used by mongooses, were significantly lower than, or similar to, cover of points used by mongooses within lynx areas. The probability of finding mon- goose tracks was constant across levels of scrubland cover when lynx were absent, but more mongoose tracks were likely to be found in thicker scrubland within lynx areas, especially if these areas were intensively used by lynx. This result agrees with the hypothesis on shifts in microhabitat use of subordinate carnivores to prevent fatal or risky encounters with dominant ones.

Microhabitat use by white-footed mice Peromyscus leucopus in forested and old-field habitats occupied by Morrow's honeysuckle Lonicera morrowii

We quantified microhabitat use by white-footed mice Peromyscus leucopus in forest and old-field habitats occupied by Morrow's honeysuckle Lonicera morrowii,an invasive exotic shrub imported from Japan. Microhabitat characteristics were compared between trails used by mice (n=124) and randomly selected trails (n=127) in 4 study plots located at Fort Necessity National Battlefield,Farmington,Pennsylvania,USA. We compared 10 microhabitat variables between used and random trails using non-metric multidimensional scaling (NMDS) and classification and regression tree (CART) analysis. Trails used by mice were statistically different from randomly selected trails in both forested plots (P<0.008) and old-field plots (P<0.001). In the forested plots,trails of white-footed mice were more often associated with a greater percent cover (% cover) of coarse woody debris (CWD) than were randomly selected trails. In the old-field plots,mouse trails were commonly characterized by having a lower % cover of exotic herbaceous vegetation,a greater % cover of shrubs,and a greater % cover of Morrow's honeysuckle than randomly selected trails. Our study indicates that white-footed mice do not move randomly and prefer areas of high structural complexity,thereby showing significant microhabitat preference. The preference of white-footed mice for areas with a relatively high percent cover of Morrow's honeysuckle could 1) be a factor in the aggressive nature of the exotic honeysuckle shrub's spread throughout the Battlefield or 2) cause the shrub to spread even faster into adjacent areas not yet occupied by Morrow's honeysuckle.

温带荒漠灌丛和藓类结皮对土壤养分的贡献

灌丛与生物土壤结皮镶嵌分布是温带荒漠常见的地表景观之一,二者的发育均显著影响了地表土壤养分的空间分布特征及循环过程。然而,灌丛和生物土壤结皮对荒漠土壤表层养分的影响存在怎样的差异,二者对养分变化的贡献度如何尚不清楚。因此,选择中国北方典型温带荒漠古尔班通古特沙漠为研究区,以荒漠中的优势灌丛膜果麻黄(Ephedra przewalskii)灌丛和生物土壤结皮发育高级阶段的藓类结皮的结皮层及结皮下层土壤为研究对象,采集不同微生境(裸露地、灌丛下)的裸沙与藓类结皮的土壤样品。为探究不同微生境下不同土层碳、氮、磷和钾养分变化特征,测定了不同土层土壤有机碳(SOC)、全氮(TN)、全磷(TP)、全钾(TK)、速效氮(AN)、速效磷(AP)和速效钾(AK)含量。结果表明:(1)相较于裸露地,灌丛显著提高了藓类结皮不同土层有机碳、全氮和全钾的含量和裸沙全磷的含量,降低了灌丛下藓类结皮土壤全磷的含量。(2)对于速效养分而言,与裸沙相比,裸露地藓类结皮覆盖降低了土壤速效氮含量,增加了速效磷和速效钾含量;而灌丛下藓类结皮覆盖提高了土壤速效氮和速效钾的含量,但降低了速效磷的含量。(3)相关性分析显示,在0—2 cm土壤中速效磷与速效氮呈现显著负相关,而在2—6 cm速效磷与速效氮呈现显著正相关(P<0.01)。(4)贡献度分析表明,土壤中灌丛效应对养分的贡献(42.54%)要远大于藓类结皮的贡献(2.43%),但二者交互作用却降低了除速效氮以外的其他土壤养分含量。综上,灌丛、藓类结皮覆盖和土层深度变化对土壤碳、氮、磷和钾养分均具有显著影响(P<0.05),但三者间的交互效应对养分的影响不显著(P>0.05)。相对于裸露地,灌丛与藓类结皮的覆盖均对表层土壤碳、氮、磷和钾养分具有促进作用,且随着土层深度的下降,土壤养分含量呈现显著的下降趋势(P<0.05)。因此,在荒漠生态系统中耐旱灌丛与生物土壤结皮这两个最重要的斑块单元联合调控了微尺度土壤养分的空间异质性变化。

Changes in microhabitat, but not allelopathy, affect plant establishment after Acacia dealbata invasion

Aims The tree legume Acacia dealbata Link is an aggressive Australian invader that severely affects abiotic and biotic compartments of eco-systems worldwide.This invasive species outcompetes native plant communities through direct competition,changes in microhabitat and soil properties under the canopy and the release of allelopathic compounds.However,these effects are usually studied separately and under controlled conditions.The objective of this study was to evaluate the combined effect of these modifications exerted by A.dealbata on the establishment of native and invasive species in the field.Methods A full factorial experiment was performed in order to test the com-bined effect of microhabitat,soil type and allelopathy on the establish-ment of the invasive A.dealbata and three native species in the field(North-West Spain).We sowed seeds of native or invasive species in pots with different soil type(soil collected under A.dealbata or Pinus pinaster),allelopathy status(soil treated or untreated with activated car-bon)and microhabitat(under the canopy of A.dealbata or P.pinaster).The number and total biomass of established plants were evaluated after 8 months.Soil abiotic properties were determined in all soils.Important Findings The establishment of native and invasive species was signifi-cantly affected by the microhabitat,with a higher number of seedlings under the native forest(P.pinaster).The establishment of A.dealbata seedlings was also significantly promoted by its own soil.A negligible effect of allelopathy was detected on the establishment and growth of both invasive and native species.We conclude that(i)the main factor affecting seedling establish-ment was microhabitat rather than changes in soil properties or allelopathy,(ii)soil modifications by A.dealbata promote the establishment of its own seedlings,contributing to the progress of invasion and(iii)allelochemicals released by A.dealbata do not seem to play a key role for the establishment of native and invasive plants under field conditions in the European non-native range.

Effects of balancing selection and microhabitat temperature variations on heat tolerance of the intertidal black mussel Septifer virgatus

Realistic assessments of the impacts of global warming on population extinction risk are likely to require an integrated analysis of the roles of standing genetic variation,microhabitat thermal complexity,and the inter-individual variation of heat tolerance due to both genetic differences and seasonal acclimatization effects.Here,we examine whether balancing selection and microhabitat temperature heterogeneity can interact to enhance the population persistence to thermal stress for the black mussel Septifer virgatus.We deployed biomimetic data loggers on the shore to measure the microhabitat-specific thermal variation from June 2014 to April 2016.Thermal tolerance of specimens was indexed by measuring effects of temperature on heart rate.Genotyping of specimens was performed using double digestion restriction association RADSeq(ddRADseq).Our results show that inter-individual variations in thermal tolerance correlate significantly with genetic differences at some specific gene loci,and that heterozygotes have higher thermal tolerances than homozygotes.The observed seasonal changes in genotype frequency suggest that these loci are under balancing selection.The ability of thermally resistant heterozygotes to survive in sun-exposed microhabitats acts to balance the loss of homozygotes during summer and enable the persistence of genetic polymorphisms.Population persistence of the mussel is also facilitated by the micro-scale variation in temperature,which provides refugia from thermal stress.Our results emphasize that inter-individual variation in thermal tolerance and in microhabitat heterogeneity in temperature are important for the persistence of populations in rocky shore habitats.

影响红松幼苗更新的微生境指标筛选与评价模型构建

在吉林省露水河林业局东升林场红松(Pinus koraiensis)天然针阔混交林内设置100 m×100 m试验样地;在样地内,选择0.10、0.15、0.55、0.65、0.75不同郁闭度,以天然更新的红松幼苗为中心,设置20 m×20 m的标准样方9个,其中郁闭度0.10、0.15的部分为林窗,林窗内共设置样方3个(郁闭度0.10的设置1个,郁闭度0.15的设置2个),其它每个等级郁闭度的设置样方2个。依据试验设计,测量红松幼苗的苗高及地径;以目标红松幼苗为中心、15 m距离为半径,测量区划范围内红松母树及阔叶伴生树种的数量、树高、胸径、冠幅、活冠长、幼苗与红松母树的距离、幼苗与伴生树种的距离。以影响红松幼苗生长微生境的8个影响因素(郁闭度、冠高比、高径比、树冠伸展度、树冠体积、冠距比、红松母树数量、阔叶伴生指标)为评价指标,采用因子分析、聚类分析、二次多项式逐步回归分析等方法,筛选影响红松幼苗更新的主要微生境指标,构建红松幼苗生长适宜微生境的评价模型。结果表明:随着郁闭度的增加红松幼苗更新数量有减少的趋势,且幼苗的高度及地径均有变小的趋势。幼苗的数量在不同郁闭度间差异显著,苗高和地径在低郁闭度时显著大于中、高郁闭度时。采用因子分析法确定影响红松幼苗生长环境的4个上层乔木指数,分别为冠层结构指数(U_(1):与母树冠高比呈负相关,与郁闭度、母树高径比呈正相关的影响红松幼苗生长的微生境指标)、母树树冠大小指数(U_(2):与母树树冠伸展度、母树树冠体积呈正相关的影响红松幼苗生长的微生境指标)、母树庇荫指数(U_(3):与母树冠距比呈正相关、与母树数量呈负相关的影响红松幼苗生长的微生境指标)、伴生指数(U_(4):与阔叶伴生指标呈负相关的影响红松幼苗生长的微生境指标)。按相关度对各指数重新进行权重分配,得到红松幼苗生长的微生境综合得分(U)评价模型U=0.350 U_(1)+0.234 U_(2)+0.219 U_(3)+0.196 U_(4)。运用系统聚类法将影响红松幼苗生长的微生境进行等级划分,将微生境划分为3个等级时,各指标在不同等级间存在显著差异。根据4个指数与微生境等级间的相关关系,应用二次多项式逐步回归法,构建红松幼苗生长环境适宜度(H)评价模型H=1.941-1.721 U_(2)-2.628 U_(4)-2.736 U_(2)1-1.276 U_(2)4-2.372 U_(1) U_(2)+1.586 U_(1) U_(4)-3.222 U_(2) U_(3),模型决定系数为0.93、F=40.53、p<0.01,拟合程度较好;均方误差(MSE)值与平均绝对百分比误差(MAPE)值均为0.03,表明模型预测精度较高。

天山云杉天然更新幼苗性状与微生境因子的关系

为加深认识天山微生境在植物幼苗定植过程中的作用,以天山北坡中部天山云杉(Picea schrenkiana var.tianschanica)1年生天然更新幼苗为研究对象,基于对幼苗性状和微生境因子的调查,通过对幼苗性状和微生境因子相关性的排序分析,解析幼苗性状与微生境因子之间的关系,探讨微生境因子对幼苗性状的影响。结果表明:显著影响天山云杉1年生天然更新幼苗性状的微生境因子有枯落物层厚度、土壤紧实度、草本层高度、草本层盖度、苔藓层盖度、枯落物层盖度、海拔、根系盘结层厚度、土壤容重、土壤全磷和土壤含水量,这11个微生境因子可解释天山云杉1年生天然更新幼苗56.01%的性状变异,其中枯落物层厚度、苔藓层盖度、土壤紧实度和土壤容重占总解释率的55.13%。在天山云杉天然更新的定植过程中,微生境因子中地被物类型及土壤的疏松程度对1年生幼苗性状有较强的影响。

地形微生境对区域温度变化的缓冲作用

研究黄土丘陵区的地形微生境,了解微生境的形成机制及特征,对于生物多样性的恢复和保护都具有重要意义。选择陕西省安塞县陈家洼为研究区,按照不同坡向与坡位布设Ibutton电子温度记录仪采集温度数据。比较各坡段地面5 cm处与地上150 cm处的极端温度与相应的显域生境的温度变化,量化微生境的缓冲作用。采用平均温度、极端高温、极端低温等指标来评估地形微生境温度对区域温度变化的非同步性,并采用温度变幅来衡量地形微生境气候的稳定性。结果表明,在最热两周中,阴坡沟底地最大缓冲度8℃,沟坡地与梁峁地最大缓度分别为6.5℃与6℃;阳面三个坡段自上而下最大热缓冲度分别为3.5℃、3℃、4℃。地形微生境对于夏季极端高温的缓冲作用阴坡>阳坡;而阳坡沟底地、沟坡地、梁峁地在最冷两周的最大冷缓冲值可达4.5℃,4℃、4℃,阴坡沟底地最大可缓冲3.5℃,其次是沟坡地与梁峁地,最大缓冲度为3℃与2℃。对于冬季极端低温的缓冲作用阴坡<阳坡。但无论是热缓冲还是冷缓冲,各坡段之间存在显著差异(P<0.05),阴坡与阳坡的缓冲值皆存在自下而上的阶梯性,即沟底地>沟坡地>梁峁地。日温度变幅阳坡>阴坡,且梁峁地>沟坡地>沟底地。本研究量化了微生境的缓冲能力,强调了微生境在调节宏观气候变化中的重要性,可为未来气候变化模型预测提供支撑。

不同喀斯特小生境下普定杜鹃花土壤酶活性变异特征

【目的】研究典型喀斯特不同小生境下土壤酶活性及其变异特征,为喀斯特地区植被恢复提供科学依据。【方法】以贵州喀斯特区(镇宁县、晴隆县、望谟县)的圆果化香树+普定杜鹃花(Rhododendron pudingense)群落为对象,通过测定3种小生境(土面、石沟、石面)中土壤胞内酶(脲酶、蔗糖酶、纤维素酶、蛋白酶)和胞外酶[(酸性磷酸酶(AP)、过氧化物酶(POD)、过氧化氢酶(CAT)、超氧化物歧化酶(SOD)]活性,分析其在不同小生境中的变异特征及其与环境因子的相互关系。【结果】3种小生境下胞内酶和胞外酶均呈现出土面>石沟>石面,且胞内酶活性均小于胞外酶,胞外酶约占总体酶活性的93%;不同小生境下土壤酶活性差异显著(P<0.05),除晴隆的群落土壤脲酶、POD和SOD活性表现为土面>石面>石沟外,其余的土壤酶活性均为土面>石沟>石面;土壤酶活性受到群落中植物物种多样性影响,晴隆的群落中植物生长最旺盛,土壤酶活性相较于镇宁和望谟更高;小生境间的差异性影响土壤酶活性变化,尤其是水分、温度、腐殖质含量及土壤厚度等影响较大,而生境间差异导致地上植物多样性丰度不均,对底物供应也具有一定影响;喀斯特土面小生境条件最优,最适合植物生长,石沟小生境次之,石面小生境条件最差。【结论】喀斯特生境土壤酶活性受小生境类型影响,土面小生境土壤的酶活性普遍高于石沟和石面,土壤酶活性变化一定程度解释特有种普定杜鹃花生长在喀斯特小生境。

公园绿地微生境对绢毛匍匐委陵菜花期生长发育的影响

【目的】为绢毛匍匐委陵菜(Potentilla reptans var.sericophylla)在公园绿地不同环境中的科学应用及花期养护管理提供借鉴。【方法】调查公园绿地不同微生境(林下、林缘、旷地、凹地)的空气、光照、土壤等环境因子特征及绢毛匍匐委陵菜花期生长发育状况,运用多元回归分析法,分析主要环境因子对绢毛匍匐委陵菜花期生长发育特征的影响。【结果】1)不同微生境类型中绢毛匍匐委陵菜花期的地上生物量、匍匐茎平均长度有显著差异(P<0.05),匍匐茎数量有极显著差异(P<0.01),土壤含水率对匍匐茎发生有一定影响,凹地微生境20%的土壤含水率更适于绢毛匍匐委陵菜花期匍匐茎的发生与伸长。2)不同微生境下的花量、花期有极显著差异(P<0.01),花量、花期均与空气湿度、相对光照强度呈正相关关系,在空气湿度为28.19%,相对光照强度为100%的旷地生境中,绢毛匍匐委陵菜花量最多且花期也最长。3)株高和盖度与空气湿度之间有着极显著的正相关关系(P<0.01),空气湿度为28.35%的林缘微生境中绢毛匍匐委陵菜花期株高、盖度最更。【结论】光照条件更好的旷地生境可以有效维持绢毛匍匐委陵菜的花期并提升花量,坡地微地生境绢毛匍匐委陵菜匍匐茎最多且长,林缘微生境创造的较湿润的空气条件有助于绢毛匍匐委陵菜增高和覆盖地表。