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78 results for “Alpine meadows”
Figure 31 from: Caleb JTD, Sajan SK, Kumar V (2018) New jumping spiders from the alpine meadows of the Valley of Flowers, western Himalayas, India (Araneae, Salticidae). ZooKeys 783: 113-124. https://doi.org/10.3897/zookeys.783.25225
Figure 31 Alpine meadow habitat of Nandiciusvallisflorum sp. n. and Pelleneshimalaya sp. n. Image was kindly provided by Dibyajyoti Ghosh.
Figures 28-30 from: Caleb JTD, Sajan SK, Kumar V (2018) New jumping spiders from the alpine meadows of the Valley of Flowers, western Himalayas, India (Araneae, Salticidae). ZooKeys 783: 113-124. https://doi.org/10.3897/zookeys.783.25225
Figures 28-30 Pelleneshimalaya sp. n., paratype (AA1644). 28 epigyne, ventral view 29 vulva, dorsal view 30 same. Abbreviations: CBP – central blind pocket; Cd – copulatory duct; Fd – fertilization duct; S – spermatheca. Scale bars: 0.1 mm (28–30).
Figures 9-13 from: Caleb JTD, Sajan SK, Kumar V (2018) New jumping spiders from the alpine meadows of the Valley of Flowers, western Himalayas, India (Araneae, Salticidae). ZooKeys 783: 113-124. https://doi.org/10.3897/zookeys.783.25225
Figures 9-13 Pelleneshimalaya sp. n. 9–11 general appearance. 9 dorsal view (holotype) 10 ventral view 11 dorsal view of paratype (AA1646). 12–13 carapace, front views. 12 holotype 13 paratype (AA1645). Scale bars: 1 mm (9–11); 0.5 mm (12–13).
Community species diversity mediates the trade-off between aboveground and belowground biomass for grasses and forbs in degraded alpine meadow, Tibetan Plateau
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Data from: Differential responses of ecosystem carbon flux components to experimental precipitation gradient in an alpine meadow
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Data from: Nitrogen addition reduces soil respiration but increases the relative contribution of heterotrophic component in an alpine meadow
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The distant Microbial communities in Tibetan alpine meadow based on Geochip 4.0
GEO Series GSE52425. uncultured bacterium; Bacteria. 63 samples. Type: Genome variation profiling by array.
Data from: Temperature mediated responses of carbon fluxes to precipitation variabilities in an alpine meadow ecosystem on the Tibetan Plateau
Effects of climate warming and changing precipitation on ecosystem carbon fluxes have been intensively studied. However, how they co-regulate carbon fluxes is still elusive for some under-studied ecosystems. To fill the gap, we examined net ecosystem productivity (NEP), gross ecosystem productivity (GEP) and ecosystem respiration (ER) responses to multi-level of temperature increments (control, warming 1, warming 2, warming 3, warming 4) in three contrasting hydrological growing seasons in a typical semiarid alpine meadow. We found that carbon fluxes responded to precipitation variations more strongly in low-level warming treatments than in high-level ones. The distinct responses were attributable to different soil water conditions and community composition under low-level and high-level warming during the three growing seasons. In addition, carbon fluxes were much more sensitive to decreased than to increased precipitation in low-level warming treatments, but not in high-level ones. At a regional scale, this negative asymmetry was further corroborated. This study reveals that future precipitation changes, particularly decreased precipitation would induce significant change in carbon fluxes, and the effect magnitude is regulated by climate warming size.
Data from: The effects of warming and nitrogen addition on ecosystem respiration in a Tibetan alpine meadow: the significance of winter warming
Global warming has become an indisputable fact on the Tibetan Plateau in the last decades. Alpine ecosystems are very sensitive to global warming, while the impact may depend on the degree of atmospheric nitrogen (N) deposition. Previous studies paid more attention on year-round warming, while the effects of winter warming was still lacking. In this paper, a manipulative experiment consisted of warming and N addition was carried out in an alpine meadow since 2010, and three types of warming treatments were set up: no-warming (NW), year-round (YW) and winter warming (WW). Warming significantly increased air and soil temperature, but decreased soil moisture. YW significantly decreased ecosystem respiration (Reco) in 2012, and WW decreased Reco under no N addition in 2014, while neither YW nor WW had significant effects on Reco under N addition, indicating that N addition compensated the negative effect of warming on Reco. Annually, YW and WW decreased total carbon (C) emissions, and the decrease extent was even larger under winter warming. Both YW and WW significantly decreased aboveground biomass under no N addition. YW significantly decreased soil inorganic N, and WW decreased it in 2013 and 2014 under no N, and WW decreased soil microbial biomass C. Structure Equation Modelling showed that soil moisture was the most important factors regulating Reco, and soil inorganic N content and microbial biomass C can explain 46.6% and 16.8% variations of Reco. The findings indicate that soil properties changes under warming had substantially effects on ecosystem C efflux in this alpine meadow. Inhibitory effects of winter warming on ecosystem C efflux were mainly attributed to the decline of soil N and soil microbial biomass, thus the effects of winter warming on ecosystem C emission are not so serious as expected and largely depend on N deposition in this semi-arid alpine meadow.
Data from: Nitrogen controls the net primary production of an alpine Kobresia meadow in the northern Qinghai-Tibet Plateau
Net primary production (NPP) is a fundamental property of natural ecosystems. Understanding the temporal variations of NPP could provide new insights into the responses of communities to environmental factors, whilst also contributing to a better assessment of regional carbon storage. However, few studies based on long-term field biomass measurements have directly addressed this subject in the unique environment of the Qinghai-Tibet plateau (QTP). we examined the interannual variations of NPP during 2008-2015 by monitoring both aboveground net primary productivity (ANPP) and belowground net primary productivity (BNPP), and identified their relationships with environmental factors by adopted the general linear model (GLM)and structural equation model (SEM). In addition, the interannual variation of root turnover and its controls were also investigated. The results show that the ANPP and BNPP increased by rates of 15.01 g/m2 and 143.09 g/m2 per year during 2008-2015, respectively. BNPP was mainly affected by growing season air temperature (GST) and growing season precipitation (GSP) rather than mean annual air temperature (MAT) or mean annual precipitation (MAP), while ANPP was only controlled by GST. In addition, available nitrogen (AN) was significant positively associated with BNPP and ANPP. Root turnover rate averaged 30% /yr, increased with soil depth, and was largely controlled by GST. Our results suggest that alpine Kobresia meadow was an N-limited ecosystem, the NPP on the QTP might increase further in the future in the context of global warming and nitrogen deposition.
Plant litter influences the temporal stability of plant community biomass in an alpine meadow by altering the stability and asynchrony of plant functional groups
<p>The stability of a plant community is defined as its ability to resist and be resilient to changes. Plant community stability can be driven by a range of external perturbations as well as by plant community traits. Plant litter traits (species or mass) are widely recognized drivers for plant community composition and diversity changes in grasslands. Yet, the effects of litter traits on the temporal stability of plant communities in natural grasslands are largely unknown. </p> <p>In this study, a field experiment was conducted at an alpine meadow on the Qinghai Tibetan Plateau to quantify the effects of litter from <i>Elymus nutans</i>, <i>Kobresia setchwanensis</i> and <i>Ligularia virgaurea</i> on the temporal stability of plant community biomass at five different mass levels (0, 100, 200, 400 and 600 g m<sup>−2</sup>). The experiment was conducted over the period from the pre-growth to peak–growth stage between 2017 and 2019, during which temporal stability of plant community biomass was assessed in relation to plant community characteristics.</p> <p>The effects of litter on temporal stability of plant community biomass were mainly driven by the litter mass rather than the litter species. A hump-shaped relationship between litter mass and temporal stability of plant community biomass was found, with the highest stability under intermediate litter mass treatment (200 g m<sup>−2</sup>). A structural equation model identified this response was driven by the indirect effects of litter mass on the temporal stability of the biomass of the dominant (forbs) and subdominant (grasses) functional groups in the community and the asynchrony of plant functional groups.</p> <p>The results of this study demonstrate that plant litter traits are important drivers for maintaining plant community stability in natural grasslands, highlighting the importance of grassland management decisions (e.g., grazing intensity) relating to the quantity and quality of litter accumulation. </p>
Data from: Temperature mediated responses of carbon fluxes to precipitation variabilities in an alpine meadow ecosystem on the Tibetan Plateau
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Foliar fungal pathogens along an elevation gradient in Tibetan alpine meadow
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Data from: Nitrogen controls the net primary production of an alpine Kobresia meadow in the northern Qinghai-Tibet Plateau
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Plant litter influences the temporal stability of plant community biomass in an alpine meadow by altering the stability and asynchrony of plant functional groups
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Data from: The effects of warming and nitrogen addition on ecosystem respiration in a Tibetan alpine meadow: the significance of winter warming
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On following pages: 149. Meadow Vole (Microtus pennsyivanicus); 150. Long-tailed Vole (Microtus longicaudus); 151. Creeping Vole (Microtus oregoni); 152. Major's Pine Vole (Microtus majori); 153. Common Pine Vole (Microtus subterraneus); 154. Caucasian Pine Vole (Microtus daghestanicus); 155. Alpine Pine Vole (Microtus multiplex); 156. Liechtenstein's Pine Vole (Microtus liechtensteini); 157. Tatra Pine Vole (Microtus tatricus): 158. Mediterranean Pine Vole (Microtus duodecimcostatus); 159. Lusitanian Pine Vole (Microtus lusitanicus); 160. Pyrenean Pine Vole (Microtus gerbil); 161. Savi's Pine Vole (Microtus savii): 162. Calabria Pine Vole (Microtus brachycercus); 163. Sicilian Pine Vole (Microtus nebrodensis); 164. Thomas's Pine Vole (Microtus thomasi); 165. Balkan Pine Vole (Microtus felteni); 166. Schelkovnikov's Pine Vole (Microtus schelkovnikovi): 167. Harting's Vole (Microtus hartingi); 168. Levant Vole (Microtus guentheri); 169. Dogramaci's Vole (Microtus dogramacii); 170. Cyrenaica Vole (Microtus mustersi); 171. Social Vole (Microtus socialis): 172. Anatolian Vole (Microtus anatolicus): 173. Iranian Vole (Microtus iran); 174. Kopet Dag Pine Vole (Microtus paradoxus); 175. Common Vole (Microtus arvalis); 176. Altai Vole (Microtus obscurus); 177. East European Vole (Microtus mystacinus); 178. Kerman Vole (Microtus kermanensis); 179. Transcaspian Vole (Microtus transcaspicus); 180. Tian Shan Vole (Microtus ilaeus). in Cricetidae
On following pages: 149. Meadow Vole (Microtus pennsyivanicus); 150. Long-tailed Vole (Microtus longicaudus); 151. Creeping Vole (Microtus oregoni); 152. Major's Pine Vole (Microtus majori); 153. Common Pine Vole (Microtus subterraneus); 154. Caucasian Pine Vole (Microtus daghestanicus); 155. Alpine Pine Vole (Microtus multiplex); 156. Liechtenstein's Pine Vole (Microtus liechtensteini); 157. Tatra Pine Vole (Microtus tatricus): 158. Mediterranean Pine Vole (Microtus duodecimcostatus); 159. Lusitanian Pine Vole (Microtus lusitanicus); 160. Pyrenean Pine Vole (Microtus gerbil); 161. Savi's Pine Vole (Microtus savii): 162. Calabria Pine Vole (Microtus brachycercus); 163. Sicilian Pine Vole (Microtus nebrodensis); 164. Thomas's Pine Vole (Microtus thomasi); 165. Balkan Pine Vole (Microtus felteni); 166. Schelkovnikov's Pine Vole (Microtus schelkovnikovi): 167. Harting's Vole (Microtus hartingi); 168. Levant Vole (Microtus guentheri); 169. Dogramaci's Vole (Microtus dogramacii); 170. Cyrenaica Vole (Microtus mustersi); 171. Social Vole (Microtus socialis): 172. Anatolian Vole (Microtus anatolicus): 173. Iranian Vole (Microtus iran); 174. Kopet Dag Pine Vole (Microtus paradoxus); 175. Common Vole (Microtus arvalis); 176. Altai Vole (Microtus obscurus); 177. East European Vole (Microtus mystacinus); 178. Kerman Vole (Microtus kermanensis); 179. Transcaspian Vole (Microtus transcaspicus); 180. Tian Shan Vole (Microtus ilaeus).
Metagenomic analysis revealed the microbial-mediated soil organic carbon loss under the degeneration succession in alpine meadow
GEO Series GSE93158. uncultured soil microorganism. 20 samples. Type: Other.
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