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Climate-growth relationships of Pinus tabuliformis along an altitudinal gradient on Baiyunshan Mountain,Central China

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Journal of Forestry Research 2024年第1期35卷 202-212页

作者： Xiaoxu Wei Jianfeng Peng Jinbao Li Jinkuan Li Meng Peng Xuan Li Yameng Liu Jiaxin Li College of Geography and Environmental Science Henan UniversityKaifeng 475004People’s Republic of China Key Laboratory of Earth System Observation and Simulation of He’nan Province Kaifeng 475004People’s Republic of China Department of Geography University of Hong KongPokfulamHong Kong SARPeople’s Republic of China HKU Shenzhen Institute of Research and Innovation Shenzhen 518057People’s Republic of China

A set of standard chronologies for tree-ring width(TRW),earlywood width(EWW)and latewood width(LWW)in Pinus tabuliformis Carr.along an altitudi-nal gradient(1450,1400,and 1350 m a.s.l.)on Baiyunshan Mountain,Central China to analyze the effect of varying temperature and precipitation on growth along the gradi-ent.Correlation analyses showed that at all three altitudes and the TRW and EWW chronologies generally had signifi-cant negative correlations with mean and maximum tem-peratures in the current April and May and with minimum temperatures in the prior July and August,but significant positive correlations with precipitation in the current May.Correlations were generally significantly negative between LWW chronologies and all temperatures in the prior July and August,indicating that the prior summer temperature had a strong lag effect on the growth of P.tabuliformis that increased with altitude.The correlation with the standard-ized precipitation evapotranspiration index(SPEI)confirmed that wet conditions in the current May promoted growth of TR and EW at all altitudes.Significant altitudinal differences were also found;at 1400 m,there were significant positive correlations between EWW chronologies and SPEI in the current April and significant negative correlations between LWW chronologies and SPEI in the current September,but these correlations were not significant at 1450 m.At 1350 m,there were also significant negative correlations between the TRW and the EWW chronologies and SPEI in the prior October and the current July and between LWW chronology and SPEI in the current August,but these cor-relations were not significant at 1400 m.Moving correlation results showed a stable response of EWW in relation to the SPEI in the current May at all three altitudes and of LWW to maximum temperature in the prior July-August at 1400 m from 2002 to 2018.The EWW chronology at 1400 m and the LWW chronology at 1450 m were identified as more suitable for climate reconstruction.These results provide a strong scientific basis f

关键词： Tree rings Climate response altitudinal gradient Baiyunshan Mountain Pinus tabuliformis Carr

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Seedling potential of trees species along the elevational gradient in temperate hill forest of central Nepal

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Journal of Mountain Science 2024年第4期21卷 1329-1344页

作者： DANI Ram Sharan BANIYA Chitra Bahadur Central Department of Botany Tribhuvan UniversityKirtipur 44618Nepal

Regeneration status of tree species along elevation gradient in temperate hill forest was not understood greatly.Present research examined the tree diversity and its regeneration patterns along an elevation gradient in temperate hill forest,central Nepal.Data were collected from 300 sample plots within vertical elevation bands of 10,ranging from 1365 to 2450 m asl.A random sampling method was used for data collection in three seasons,winter,pre-monsoon and post monsoon seasons.Diameter at breast height(DBH)was used to broadly categorize the plant individual into trees,saplings and seedlings.The tree species richness ranged from 12 to 25 with density of 350 to 1200 individuals per hectare.Species richness of tree and sapling showed statistically significant unimodal pattern,which peaked at mid-elevation.Elevation showed a strong and positive linear correlation with the seedling density(Deviance=0.99,pseedling(10.6%)≤mature(10.9%).Among tested environmental variables,elevation and annual mean rainfall were the most influential factors in the regeneration of tree species.

关键词： Regeneration potential Chandragiri hill altitudinal gradient Species diversity Tree species richness

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Vegetation distribution pattern along altitudinal gradient in subtropical mountainous and hilly river basin, China

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Journal of Geographical Sciences 2013年第2期23卷 247-257页

作者： QIU Bingwen ZENG Canying CHEN Chongcheng ZHANG Chungui ZHONG Ming KeyLaboratoryofSpatialDataMining&InformationSharingofMinistryofEducation.SpatialInformationResearchCentreofFujianProvince FuzhouUniversityFuzhou350002China FujianMeteorologicalResearchInstitute Fuzhou350002China

Knowledge of vegetation distribution patterns is very important. Their relationships with topography and climate were explored through a geographically weighted regression （GWR） framework in a subtropical mountainous and hilly region, Minjiang River Basin of Fujian in China. The HJ-1 satellite image acquired on December 9, 2010 was utilized and NDVI index was calculated representing the range of vegetation greenness. Proper analysis units were achieved through segregation based on small sub-basins and altitudinal bands. Results indicated that the GWR model was more powerful than ordinary linear least square （OLS） regression in interpreting vegetation-environmental relationship, indicated by higher adjusted R2 and lower Akaike information criterion values. On one side, the OLS analysis revealed dominant positive influence from parameters of elevation and slope on vegetation distribution. On the other side, GWR analysis indicated that spatially, the parameters of topography had a very complex relationship with the vegetation distribution, as results of the various combinations of environmental factors, vegetation composition and also anthropogenic impact. The influences of elevation and slope generally decreased, from strongly positive to nearly zero, with increasing altitude and slope. Specially, most rapid changes of coefficients between NDVI and elevation or slope were observed in relatively flat and low-lying areas. This paper confirmed that the non-stationary analysis through the framework of GWR could lead to a better understanding of vegetation distribution in subtropical mountainous and hilly region. It was hoped that the proposed scale selection method combined with GWR framework would provide some guidelines on dealing with both spatial （horizontal） and altitudinal （vertical） non-stationarity in the dataset, and it could easily be applied in characterizing vegetation distribution patterns in other mountainous and hilly river basins and related research.

关键词： vegetation altitudinal gradient GWR non-stationary Minjiang River Basin

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A test of BIOME-BGC with dendrochronology for forests along the altitudinal gradient of Mt. Changbai in northeast China

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Journal of Plant Ecology 2017年第3期10卷 415-425页

作者： Yulian Wu Xiangping Wang Shuai Ouyang Kai Xu Bradford A.Hawkins Osbert Jianxin Sun Key Laboratory for Forest Resources and Ecosystem Processes of Beijing College of ForestryBeijing Forestry University35 East Qinghua RoadHaidianBeijing 100083China Department of Ecology and Evolutionary Biology University of CaliforniaIrvineCA 92697USA

Aims Process-based models are basic tools for predicting the response of forest carbon to future climate change.The models have commonly been tested for their predictions of spatial variation in forest produc-tivity,but much less for their ability to predict temporal variation.Here,we explored methods to test the models with tree rings,using BIOME-BGC as an example.Methods We used net primary productivity(NPP)data and tree rings col-lected from five major forest types along the altitudinal gradient of Mt.Changbai,northeast China,to test local-parameterized BIOME-BGC model.We first test the model’s predictions of both spatial(Test 1)and temporal changes(Test 2)in productivity.Then we test if the model can detect the climatic factors limiting forest productiv-ity during historical climate change,as revealed by dendroclimatic analyses(Test 3).Important Findings Our results showed that BIOME-BGC could well simulate NPP of five forest types on Mt.Changbai,with an r^(2) of 0.69 between mod-eled and observed NPP for 17 plots along the altitudinal gradient(Test 1).Meanwhile,modeled NPP and ring-width indices were cor-related and showed similar temporal trends for each forest type(Test 2).While these tests suggest that the model’s predictions on spatial and temporal variation of NPP were acceptable,a further test that relate the correlations of modeled NPP with climate variables to the correlations of ring widths with climate(Test 3)showed that the model did not well identify the climatic factors limiting historical productivity dynamics for some forest types,and thus cannot reli-ably predict their future.Both dendrochronology and BIOME-BGC showed that forest types differed markedly in the climate factors limiting productivity because of differences in tree species and cli-mate condition,and thus differed in responses to climate change.Our results showed that a successful prediction of spatial NPP pat-terns cannot assure that BIOME-BGC can well simulate histori-cal NPP dynamics.Further,a correlation between modeled NPP an

关键词： net primary productivity(NPP) process-based model tree ring model validation altitudinal gradient

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Variation and Sexual Dimorphism of Body Size in the Plateau Brown Frog along an altitudinal gradient

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Asian Herpetological Research 2015年第4期6卷 291-297页

作者： Xueyun FENG Wei CHEN Junhua HU Jianping JIANG Chengdu Institute of Biology Chinese Academy of Sciences University of Chinese Academy of Sciences Ecological Security and Protection Key Laboratory of Sichuan Province Mianyang Normal University

Variation in body size and sexual size dimorphism（SSD） can have important consequences for animal ecology, behavior, population dynamics and the evolution of life-history traits. Organisms are expected to be larger in colder climate（i.e., Bergmann＇s rule） and SSD varies with body size（i.e., Rensch＇s rule）. However, the underlying mechanisms are still elusive. The plateau brown frog（Rana kukunoris）, a medium-sized anuran species with femalebiased SSD, is endemic to the Qinghai-Tibetan Plateau（QTP）. From 1797 m（Maoxiang＇ping） to 3453 m（Heihe＇qiao） in the eastern margin of the QTP, we surveyed 10 populations of R. kukunoris and collected phalanges and snout vent length（SVL） data for 258 adult individuals（199 males versus 59 females）. Based on these data, we explored how body size and SSD varying along the altitudinal gradient and examined the corresponding effects of temperature. We found body size to be larger at higher altitude for males but not for females, with likely effects from the temperature on the variation in male body size. Sex differences in growth rates may be the main cause of the variation in SSD. Our results suggested that only males follow the Bergmann＇s rule and variation in SSD of R. kukunoris do not support the Rensch＇s rule and its inverse. Therefore, the variations of body size can be different between sexes and the applicability of both Bergmann＇s rule and Rensch＇s rule should depend on species and environment where they live.

关键词： altitudinal gradient Bergmann＇s rule body size variation Qinghai-Tibetan Plateau Rana kukunoris,Rensch＇s rule sexual size dimorphism

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Climate Variability and Soil Nutrients Status along altitudinal gradient in Kigezi Highlands, Southwestern Uganda

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Natural Resources 2016年第1期7卷 1-22页

作者： Fortunate Twagiramaria Casim Umba Tolo Department of Biology Mbarara University of Science and Technology Mbarara Uganda

Kigezi highlands currently experiences changes in precipitation and temperature which modify the evaporation and soil moisture storage leading to alterations in runoff and other components of hydrological systems. Extreme events, like floods and droughts, are more intense and frequent. Furthermore heavy unpredictable rainfall has become frequent in the area, causing soil erosion and floods that destroy crops. Soil erosion is particularly a pressing challenge due to steep-sided hills leading to deterioration of soil nutrients including soil fertility. The unpredictable rains and droughts are attributed to climate change and variability. Consequently, climate change and variability have caused a significant impact on soil nutrients which have affected the agricultural productivity in the area. This paper presents findings of empirical study which explored the climate variability and soil nutrient status along altitudinal gradient. The paper particularly addresses key questions of: land management practices in the study area, nutrient availability and their effects on productivity of selected crops along altitudinal gradient in changing climate and variability. Independent variables such as topographic sequence along altitudinal gradient were evaluated against dependent variables such as yield harvests of selected grown crops and soil nutrients. Samples for crop yields were collected along transect of 0.5 kilometer using a quadrant of 4 × 4 m2 along attitudinal gradient. Soil samples were taken from selected plots at 0-20cm soil depth for nutrient analysis. Analysis of physical and chemical soil parameters was carried out on soil samples and these include: soil pH, soil organic content, total nitrogen, available soil phosphorous and exchangeable bases (Ca, Mg, K and Na). The study showed that middle parts of the transects had the highest concentration of most soil nutrients, probably because the middle parts could have been a deposition centre for some organic matter from the upper parts of the hills, and

关键词： Climate Change Climate Variability Soil Nutrients Kigezi Highlands altitudinal gradient Southwestern Uganda

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altitudinal variation in life-history features of a Qinghai-Tibetan Plateau lizard

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Current Zoology 2023年第3期69卷 284-293页

作者： Wei Yu Zeyu Zhu Xiaolong Zhao Shuang Cui Zhensheng Liu Zhigao Zeng Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China College of Wildlife Resources Northeast Forestry UniversityHarbin 150040China The Key Laboratory of Zoological Systematics and Application School of Life ScienceInstitute of Life Science and Green Development HebeiUniversityBaoding 071002HebeiChina Key Laboratory of Conservation Biology State Forestry AdministrationHarbin 150040China

Environmental changes along an altitudinal gradient can facilitate the differentiation of life-history features in ectothermic species,but little attention has been devoted to the reciprocal influence of altitude and alpine slope directionality on life-history variation.According to life-history theory,increased environmental stress causes a change in reproductive allocation from number to quality of offspring,as well as a stronger trade-off between size and number of offspring.To clarify the influence of environmental pressures on the life-history features of the Qinghai toad-headed lizard Phrynocephalus vlangalii along an altitudinal cline,we surveyed late pregnant females from 3 populations of low(2,600 m),middle(3,400 m),and high(3,600 m)elevations in the Dangjin Mountain of Gansu,China from July to October 2019,and compared their inter-population differences in maternal body size,reproductive characteristics,offspring growth,and locomotor performance.Because of lower temperatures,higher humidity,and lower light intensity caused by slope aspect and altitude,the middle-altitude region experienced stronger environmental stress than the high-and low-altitude regions.Our results showed that females were larger at middle-and high-altitude sites and smaller at the low-altitude site,following Bergmann’s rule.We also found that females from low-altitude population gave birth earlier than those from the middle and high altitudes.Our results showed a shift in the offspring size-number trade-off of P.vlangalii in response to colder and harsher environments,with lizards from the alpine steppe(i.***.the middle-and high-altitude habitats)producing fewer but larger offspring than those from the warm steppe(i.***.the low-altitude habitat).Low-altitude juveniles grew faster than high-altitude ones,but at the same rates as middle-altitude juveniles.This result demonstrates that the growth of P.vlangalii was associated with temperature and light intensity.Our findings contribute to enhancing our understanding of the altitudinal var

关键词： altitudinal gradient growth,life-history Phrynocephalus vlangali plateau lizard trade-off

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Effects of altitude and slope on the climate–radial growth relationships of Larix olgensis A.Henry in the southern Lesser Khingan Mountains,Northeast China

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Ecological Processes 2022年第1期11卷 618-630页

作者： Jingjing Qiao Yujun Sun National Forestry&Grassland Administration Key Laboratory of Forest Resources&Environmental Management Beijing Forestry UniversityBeijing 100083China

Background:The relationship between climate and radial growth of trees exhibits spatial variation due to environ-mental changes.Therefore,elucidation of how the growth–climate responses of trees vary in space is essential for understanding forest growth dynamics to facilitate scientific management with the ongoing global climate warming.To explore the altitudinal and slope variations of these interactions,tree-ring width chronologies of Larix olgensis A.Henry were analyzed in the southern Lesser Khingan Mountains,Northeast China.Results:The radial growth of L.olgensis exhibited significant 5-to 10-year periodic changes at three altitudes and two slopes,and the frequency change occurred mainly during the early growth stage and after 2000.The radial growth of L.olgensis was significantly negatively correlated with September precipitation only at low altitudes,but also with the mean temperature in July–August and the mean maximum temperature in June–August at high altitudes.The radial growth of L.olgensis at low and middle altitudes as well as on the sunny slope led to a higher demand for moisture,while temperature was the key limiting factor at high altitudes and on the shady slope.Conclusions:The climate–radial growth relationship of L.olgensis exhibits altitudinal and slope variability.This study quantitatively describes the spatially varying growth–climate responses of L.olgensis in the southern Lesser Khingan Mountains,which provides basic data for the management of L.olgensis forests and the prediction of future climate impacts on forest ecosystems.

关键词： Larix olgensis A.Henry altitudinal gradient Slope variability Lesser Khingan Mountains

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Point pattern analysis on Potentilla fruticosa population along altitudinal gradient in Qilian Mountains

Point pattern analysis on Potentilla fruticosa population al...

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生态文明建设中的植物学：现在与未来——中国植物学会第十...

作者： Guangping Xu Zhengqiang Qiu Chengxin He Daxing Gu Denan Zhang Yuqing Huang Guangxi Institute of Botany Guangxi Zhuang Autonomous Region and the Chinese Academy of Sciences Hebei Institute of Architecture Civil Engineering

Potentilla fruticosa was sampled from Qilian Mountains, Qinghai province at altitudes of 2430m, 2990 m and 3522m respectively for investigation of its spatial distribution pattern. Here we employed the technique of point pattern analysis which could analyze patterns under all scale along a gradient. The results showed that the population density decreased remarkably with increasing elevation, the ratio of root to shoot at 2430 m was significantly higher than that at 3522 m .The middle aged were the most, young ones were letter, and the old were the least in the population from the whole aspect. The populations of Potentilla fruticosa was randomly distributed at the small spatial scales, and was clumped at the most spatial scales which ranged from 0. 1 m to 7.5m .With the altitude elevation, the scale of the clumping distribution tends to decrease. The findings suggested that the spatial distribution patterns of Potentilla fruticosa at different altitudinal depended on their biological characteristics at small scale, but on the environmental heterogeneity at larger scales. The shift of balance between competition and facilitation among neighboring individual, might be partially responsible to the observed patterns. The spatial variations o f distribution pattern reflected the competition between different species and the trends of succession of plant community.

关键词： Point pattern analysis Ripley K function altitudinal gradient Qilian Mountains.

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Diversity and distribution of soil micro-fungi along an elevation gradient on the north slope of Changbai Mountain

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Journal of Forestry Research 2017年第4期28卷 831-839页

作者： Hong Yang Guozhong Lu Huiming Jiang Dong-ning Shi Zhiheng Liu College of Environment and Resources Dalian Nationalities UniversityDalian 116600People’s Republic of China College of Life Science Dalian Nationalities UniversityDalian 116600People’s Republic of China College of Life Science Liaoning Normal UniversityDalian 116081People’s Republic of China College of Plant Protection Shenyang Agricultural UniversityShenyang 110866People’s Republic of China

Elevational changes in patterns of diversity are important to understanding of the influence of global changes, yet few studies have addressed the distribution of microorganisms, e.g. soil micro-fungi. We studied the diversity of the forest soil micro-fungi in four vegetation belts along an elevation gradient on the north slope of Changbai Mountain in Changbai National Nature Reserve. The four belts were characterized as coniferous-deciduous mixed forest, coniferous forest, Erman's birch forest, and alpine tundra. We estimated the quantity and distribution of the fungal species in each belt and calculated three indices, viz. Shannon-Wiener diversity (H'), Pielou's evenness (J'), and Margalef's abundance (E), to depict fungal species diversity. A total of 932 strains were recorded and identified, representing 53 genera, and 108 species. Among these, Penicillium, Aspergillus, Trichoderma, Mucor, Rhizopus and Fusarium were the dominant genera. With increasing elevation, the quantity of fungi and values of H', E, and J' gradually declined.

关键词： altitudinal gradient Distribution Diversities Micro-fungi

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