Age structure of Picea schrenkiana forest along an altitudinal gradient in the central Tianshan Mountains, northwestern China

Ting, Wang; Liang, Yu; Ren, Haiyun; Yu, Dan; Ni, Jian; Ma, Keping

doi:10.1016/j.foreco.2004.02.063

Cited by 53 publications

(51 citation statements)

References 20 publications

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“…Analysis of stand structure also gives historical information, but allows much more direct inferences on regeneration patterns (e.g. Wang et al 2004). We will not discuss dendrochronological approaches here as tree ring width (a measure of growth) and regeneration success are not necessarily linked (Kullman 2007).…”

Section: General Methodological Considerationsmentioning

confidence: 99%

Recruitment of trees at tropical alpine treelines:Ericain Africa versusPolylepisin South America

Wesche

Cierjacks

Assefa

et al. 2008

Plant Ecology & Diversity

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Background: Constraints on tree regeneration have been described from several temperate treeline sites, however data from tropical mountains are few. Aim: We test the hypothesis that high altitude treelines are caused by constraints on tree regeneration. We report the results of recent studies on climatic variables and on the reproduction of Erica spp. in east Africa, and compare those with similar studies on treeline stands of Polylepis spp. in Ecuador and Bolivia. Methods: We established altitudinal and horizontal transects comprising sampling plots from forests to surrounding grasslands. Data on microclimate, vegetation structure and reproductive activity were collected in the field, and supplemented by tests on germination requirements in the field in permanent exclosures and in the laboratory. Results: Our measurements demonstrated that the number and severity of frost events and potential water stress were higher near the soil surface (0.5 m) than in free air (2.0 m). Seeds of Erica trimera did not germinate, as the necessary climatic requirements (high diurnal temperature range, but no frost) were rarely fulfilled in the field. Most studied species were capable of clonal growth, and the relative importance of vegetative persistence tended to increase with altitude. These effects were independent of the intensity of land use. Conclusions:The harsh microclimate near the soil surface at tropical treelines may be one reason why recruitment from seed is limited for treeline-forming species. This is important for restoration or conservation schemes as well as predictions of treeline dynamics under global change.

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Section: General Methodological Considerationsmentioning

confidence: 99%

Recruitment of trees at tropical alpine treelines:Ericain Africa versusPolylepisin South America

Wesche

Cierjacks

Assefa

et al. 2008

Plant Ecology & Diversity

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“…Core samples were extracted at a height of about 1.3 m and 2-3 cores were collected from each tree. The DBH (diameter at breast height) of cored trees were measured, and the numbers of tree (≥2 m) in two stands (20×20 m 2 ) were counted to calculate the tree density of every different altitudinal zones (Wang et al 2004). Characteristic of three different altitudinal sites were shown in Table 1.…”

Section: Field Samplingmentioning

confidence: 99%

Climatic signals in tree ring of Picea schrenkiana along an altitudinal gradient in the central Tianshan Mountains, northwestern China

Wang

Ren

2005

Trees

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106

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“…Environmental conditions differ greatly with altitude thus the limiting factors related to seedling establishment and tree recruitment might vary with changes in altitude (Block & Tretor 2001, Wangda & Ohsawa 2006, Penuelas et al 2007. The understanding of environmental influences on population structure and regeneration dynamics of the natural forests could be improved by studies that sample across the distributional range (Veblen 1989, Wang et al 2004, Wangda & Ohsawa 2006, Penuelas et al 2007, Lingua et al 2008. Population structure studies along the altitudinal gradient could be instrumental in giving us insight about the influence of environment factors on the regeneration of natural forests (Wang et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…The understanding of environmental influences on population structure and regeneration dynamics of the natural forests could be improved by studies that sample across the distributional range (Veblen 1989, Wang et al 2004, Wangda & Ohsawa 2006, Penuelas et al 2007, Lingua et al 2008. Population structure studies along the altitudinal gradient could be instrumental in giving us insight about the influence of environment factors on the regeneration of natural forests (Wang et al 2004). Rhododendron campanulatum D. Don a member of Ericaceae family is found at the treeline ecotone, timberline and subalpine forest in Nepal.…”

Section: Introductionmentioning

confidence: 99%

Population Structure of Rhododendron Campanulatum D. Don and Associated Tree Species along the Elevational Gradient of Manaslu Conservation Area, Nepal

Rana

Koirala

Bhuju

et al. 2016

J. Inst. Sci. Tech.

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Climate change is affecting the forest ecosystems worldwide. Impacts of climate change are more perceptible at higher altitudes and can be easily detected along the elevational gradient. The main aim is to study the impact of elevation on the population structure of Rhododendron campanulatum D. Don and associated trees species at Manaslu Conservation Area, central Nepal. A total of 30 quadrats were sampled from 3600-4100 meter above sea level (m asl.) at altitudinal difference of 100 m with 5 quadrates in each altitude. The present study showed that R. campanulatum, Betula utilis, Abies spectabilis and Sorbus microphylla are the treeline species. R. campanulatum was the most dominant species with highest importance value index (IVI) along the altitudinal gradient. At 4000 m asl. S. microphylla was the codominant species. B. utilis was the codominant species at 3600 -3900 m asl followed by S. microphylla and A. spectabilis. R. campanulatum and A. spectabilis showed a sustainable regeneration. No seedling of B. utilis was found along the altitudinal gradient indicating that the regeneration of this species might be affected by unfavourable micohabitat (eg. deep shade). R. campanulatum and S. microphylla were found above the treeline indicating that the climatic conditions were favourable for their growth. The height, diameter and density of the species differed along the elevational gradient and showed a species specific trend.

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Age structure of Picea schrenkiana forest along an altitudinal gradient in the central Tianshan Mountains, northwestern China

Cited by 53 publications

References 20 publications

Recruitment of trees at tropical alpine treelines:Ericain Africa versusPolylepisin South America

Recruitment of trees at tropical alpine treelines:Ericain Africa versusPolylepisin South America

Climatic signals in tree ring of Picea schrenkiana along an altitudinal gradient in the central Tianshan Mountains, northwestern China

Population Structure of Rhododendron Campanulatum D. Don and Associated Tree Species along the Elevational Gradient of Manaslu Conservation Area, Nepal

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