Climatic and biotic influences on isotopic differences among topsoil waters in typical alpine vegetation types

CATENA ◽  
2021 ◽  
Vol 203 ◽  
pp. 105375
Author(s):  
Wenyi Qin ◽  
Guo Chen ◽  
Peng Wang ◽  
Xiang Wang ◽  
Xiaozhen Li
Keyword(s):  
Alpine Vegetation ◽  
Vegetation Types

A Study on Complexity of Major Vegetation Types in China

2013 ◽  
Vol 864-867 ◽  
pp. 2459-2462
Author(s):  
Zong Han Li ◽  
Hua Yong Zhang ◽  
Fei Li ◽  
Xiang Xu
Keyword(s):  
Fractal Dimension ◽  
Vegetation Type ◽  
Alpine Vegetation ◽  
Vegetation Types ◽  
Forest Types ◽  
Vegetation Map ◽  
Tropical Mountains ◽  
The Relationship ◽  
Vegetation Patches ◽  
Dimension Index

In this study, fractal dimension index is applied to describe the complexity of 11 vegetation groups and 5 needle-leaf forest vegetation types in China. Basing on the Vegetation Map of China, we calculate the perimeter and area of vegetation patches with the software ArcGis. The relationship between perimeter and area is established for each vegetation group and vegetation type, and the corresponding fractal dimension index is estimated. The results show that, among the 11 vegetation groups, the Alpine vegetation is the most complex vegetation. In the 5 needle-leaf forest types, the subtropical and tropical mountains needle-leaf forest is the most complex vegetation. It seems that the complexity of vegetation is associated with altitude. The topography may be responsible for the complexity at different scales.

Functional diversity and ecological requirements of alpine vegetation types in a biogeographical transition zone

2018 ◽  
Vol 48 (1) ◽  
pp. 77-89 ◽  
Author(s):  
Teresa García-Gutiérrez ◽  
Borja Jiménez-Alfaro ◽  
Eduardo Fernández-Pascual ◽  
Jonas V. Müller
Keyword(s):  
Transition Zone ◽  
Functional Diversity ◽  
Alpine Vegetation ◽  
Vegetation Types ◽  
Ecological Requirements

scholarly journals Changes in alpine vegetation over 50 years in the Western Tatras (Slovakia)

2018 ◽  
Vol 37 (2) ◽  
pp. 122-133
Author(s):  
Andrej Palaj ◽  
Jozef Kollár
Keyword(s):  
Gradient Analysis ◽  
Wiener Index ◽  
Current Data ◽  
Alpine Vegetation ◽  
Vegetation Types ◽  
Frequent Species ◽  
Ordination Method ◽  
Species Frequencies ◽  
Over Time ◽  
Frequency Curves

AbstractThis paper examines changes in alpine vegetation over 50 years in the Western Tatras part of the Western Carpathians Mountains in Slovakia. We focus on the following most widespread vegetation types: subalpine to subnival grasslands (alliance Juncion trifidi Krajina 1933), snowbed vegetation (alliance Festucion picturatae Krajina 1933) and dwarf-shrub vegetation (alliances Loiseleurio-Vaccinion Br.-Bl. in Br.-Bl. et Jenny 1926 and Vaccinion myrtilli Krajina 1933). The historical 1971–1977 sampling dataset was re-sampled in 2016–2017 and our research is based on a comparison of 40 pairs of these relevés. Herein, we studied (i) changes in species frequencies; (ii) changes in phytodiversity and site conditions using estimates of Ellenberg’s eco-indices and (iii) comparison of historical and current relevés over time using the nonmetric multidimensional scaling gradient analysis (NMDS) ordination method. The frequency curves reveal differences; especially in the most frequent species at 37.5−80%, which reach higher values in the current data. The higher 7.5−25% value of medium-frequent species in the historical relevés indicates progressive homogenisation of the examined vegetation. In addition, the Shannon-Wiener index of individual vegetation types revealed no significant differences in diversity or average number of species. The historical relevés included 75 species while 74 were confirmed in the current data. Statistically significant differences were determined in light factor for all three vegetation groups. This was due to the retreat of some light-demanding species. While NMDS indicated changes in Festucion and Vaccinion relevés over time, the Juncion group relevés did not follow this trend, thus confirming their high stability. The observed changes between current and historical data are attributed to changes in climate and altered land use with the cessation of grazing.

scholarly journals Biomass and Species Diversity of Different Alpine Plant Communities Respond Differently to Nitrogen Deposition and Experimental Warming

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2719
Author(s):  
Emmanuella A. Kwaku ◽  
Shikui Dong ◽  
Hao Shen ◽  
Wei Li ◽  
Wei Sha ◽  
...  
Keyword(s):  
Nitrogen Deposition ◽  
Plant Communities ◽  
N Deposition ◽  
Alpine Vegetation ◽  
Vegetation Types ◽  
Alpine Plant ◽  
Alpine Grasslands ◽  
Short Term ◽  
Alpine Plant Communities

The ability of fragile ecosystems of alpine regions to adapt and thrive under warming and nitrogen deposition is a pressing conservation concern. The lack of information on how these ecosystems respond to the combined impacts of elevated levels of nitrogen and a warming climate limits the sustainable management approaches of alpine grasslands. In this study, we experimented using a completely random blocked design to examine the effects of warming and nitrogen deposition on the aboveground biomass and diversity of alpine grassland plant communities. The experiment was carried out from 2015 to 2018 in four vegetation types, e.g., alpine desert, alpine desert steppe, alpine marsh, and alpine salinised meadow, in the Aerjin Mountain Nature Reserve (AMNR) on the Qinghai–Tibetan Plateau (QTP). We found that W (warming) and WN (warming plus N deposition) treatment significantly increased the aboveground biomass of all the vegetation types (p < 0.05) in 2018. However, W and WN treatment only significantly increased the Shannon diversity of salinised meadows in 2018 and had no significant effect on the Shannon diversity of other vegetation types. Such results suggested that long-term nitrogen deposition and warming can consistently stimulate biomass accumulation of the alpine plant communities. Compared with other vegetation types, the diversity of alpine salinised meadows are generally more susceptible to long-term warming and warming combined with N deposition. Warming accounts many of such variabilities, while short-term N deposition alone may not significantly have an evident effect on the productivity and diversity of alpine grasslands. Our findings suggested that the effects of short-term (≤4 years) N deposition on alpine vegetation productivity and diversity were minimal, while long-term warming (>4 years) will be much more favourable for alpine vegetation.

scholarly journals Spatiotemporal Variation Characteristics of Vegetative PUE in China from 2000 to 2015

2018 ◽  
Vol 2018 ◽  
pp. 1-19
Author(s):  
Haitao Xu ◽  
Peng Hou ◽  
Zhengwei He ◽  
A. Duo ◽  
Bing Zhang
Keyword(s):  
Spatiotemporal Variation ◽  
Alpine Vegetation ◽  
Vegetation Types ◽  
Broadleaf Forest ◽  
Climate Zones ◽  
Significant Difference ◽  
Increasing Trend ◽  
Variation Characteristics ◽  
The Difference ◽  
The Stability

Vegetative precipitation-use efficiency (PUE) is a key indicator for evaluating the dynamic response of vegetation productivity to the spatiotemporal variation in precipitation. It is also an important indicator for reflecting the relationship between the water and carbon cycles in a vegetation ecosystem. This paper uses data from MODIS Net Primary Production (NPP) and China’s spatial interpolation data for precipitation from 2000 to 2015 to calculate the annual value, multiyear mean value, interannual standard deviation, and interannual linear trend of Chinese terrestrial vegetative PUE over the past 16 years. Based on seven major administrative regions, eleven vegetation types, and four climate zones, we analyzed the spatiotemporal variation characteristics of China’s vegetative PUE. The research results are shown as follows: (1) China’s vegetative PUE shows obvious spatial variation characteristics, and it is relatively stable interannually, with an overall slight increasing trend, especially in Northwest and Southwest China. The vegetative PUE is higher, and its stability is declined in Xinjiang, western Gansu, and the southern Tibetan valley. The vegetative PUE is lower, and its stability is increased in northeastern Tibet and southwestern Qinghai. An increasing trend in vegetative PUE is obvious at the edge of the Tarim Basin, in western Gansu, the southern Tibetan valley, and northwestern Yunnan. (2) There is a significant difference in the PUEs among different vegetation types. The average PUE of Broadleaf Forest is the highest, and the average PUE of Alpine Vegetation is the lowest. The stability of the PUE of Mixed Coniferous and Broadleaf Forest is declined, and the stability of the PUE of Alpine Vegetation is increased. The increasing speed of the PUE of Grass-forb Community is the fastest, and the decreasing speed of the PUE of Swamp is the fastest. (3) There is a significant difference in the PUEs among different vegetation types in the same climate zone, the difference in vegetative PUE in arid and semiarid regions is mainly affected by precipitation, and the difference in vegetative PUE in humid and semihumid regions is mainly affected by soil factors. The PUEs of the same vegetation type are significantly different among climate zones. The average PUE of Cultural Vegetation has the largest difference, the stability of the PUE of Steppe has the largest difference, and the increasing speed of the PUE of Swamp has the largest difference.

A New Species of Eugenia subg. Pseudeugenia (Myrtaceae, Myrteae) from Brazilian Atlantic Forest

2020 ◽  
Vol 45 (3) ◽  
pp. 537-543
Author(s):  
Karinne Sampaio Valdemarin ◽  
Jair Eustáquio Quintino Faria ◽  
Fiorella Fernanda Mazine ◽  
Vinicius Castro Souza
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Conservation Status ◽  
Forest Vegetation ◽  
Vegetation Types ◽  
Flower Buds ◽  
Diagnostic Features ◽  
Closely Related Species ◽  
Lowland Forests ◽  
A New Species

Abstract—A new species of Eugenia from the Atlantic forest of Brazil is described and illustrated. Eugenia flavicarpa is restricted to the Floresta de Tabuleiro (lowland forests) of Espírito Santo state and is nested in Eugenia subg. Pseudeugenia. Considering all other species of the subgenus that occur in forest vegetation types of the Atlantic forest phytogeographic domain, Eugenia flavicarpa can be distinguished mainly by the combination of smooth leaves with indumentum on both surfaces, with two marginal veins, usually ramiflorous inflorescences, pedicels 4.5‐9.7 mm long, flower buds 3.5‐4 mm in diameter, and by the calyx lobes that are 2‐3 mm long with rounded to obtuse apices. Morphological analyses were performed to explore the significance of quantitative diagnostic features between the new species and the closely related species, Eugenia farneyi. Notes on the habitat, distribution, phenology, and conservation status of Eugenia flavicarpa are provided, as well as a key for all species of Eugenia subg. Pseudeugenia from forest vegetation of the Atlantic forest phytogeographic domain.

scholarly journals Laboratory model test study of the hydrological effect on granite residual soil slopes considering different vegetation types

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jie Chen ◽  
Xue-wen Lei ◽  
Han-lin Zhang ◽  
Zhi Lin ◽  
Hui Wang ◽  
...  
Keyword(s):  
Root System ◽  
Heavy Rainfall ◽  
Storage Capacity ◽  
Water Storage ◽  
Laboratory Model ◽  
Residual Soil ◽  
Vegetation Types ◽  
Water Storage Capacity ◽  
Granite Residual Soil ◽  
Stem Leaf

AbstractThe problems caused by the interaction between slopes and hydrologic environment in traffic civil engineering are very serious in the granite residual soil area of China, especially in Guangdong Province. Against the background of two heavy rainfall events occurring during a short period due to a typhoon making landfall twice or even two typhoons consecutively making landfall, laboratory model tests were carried out on the hydrological effects of the granite residual soil slope considering three vegetation types under artificial rainfall. The variation in slope surface runoff, soil moisture content and rain seepage over time was recorded during the tests. The results indicate that surface vegetation first effectively reduces the splash erosion impact of rainwater on slopes and then influences the slope hydrological effect through rainwater forms adjustment. (1) The exposed slope has weak resistance to two consecutive heavy rains, the degree of slope scouring and soil erosion damage will increase greatly during the second rainfall. (2) The multiple hindrances of the stem leaf of Zoysia japonica plays a leading role in regulating the hydrological effect of slope, the root system has little effect on the permeability and water storage capacity of slope soil, but improves the erosion resistance of it. (3) Both the stem leaf and root system of Nephrolepis cordifolia have important roles on the hydrological effect. The stem leaf can stabilize the infiltration of rainwater, and successfully inhibit the surface runoff under continuous secondary heavy rainfall. The root system significantly enhances the water storage capacity of the slope, and greatly increases the permeability of the slope soil in the second rainfall, which is totally different from that of the exposed and Zoysia japonica slopes. (4) Zoysia is a suitable vegetation species in terms of slope protection because of its comprehensive slope protection effect. Nephrolepis cordifolia should be cautiously planted as slope protection vegetation. Only on slopes with no stability issues should Nephrolepis cordifolia be considered to preserve soil and water.

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