Abstract Dissolved organic carbon (DOC) derived from plant litter plays an important role in the ecosystem balance and soil biogeochemistry. However, boreal coniferous forests no integrated understanding exists of how understory vegetation contributes to leaching DOC, nitrogen (N) phosphorus (P) with different bioavailability at forest stand level. We characterized water extractable leachates fresh decayed dominant canopy sources a forest, order explore contribution as source both total...

Abstract The Tibetan Plateau (TP) holds fundamental ecological and environmental significances to China Asia. TP also lies in the core zone of belt road initiative. To protect environment, a comprehensive screening on current research status is entailed. teased out gap can be utilized as guidelines for recently launched major programs, i.e. second scientific expedition silk plan. findings showed that has experienced significant temperature increase at rate 0.2°C per decade since 1960s. most...

Abstract Questions What are the primary types of intraspecific distribution patterns and interspecific associations tree species in temperate–subtropical transition region? Can potential ecological mechanisms such as habitat heterogeneity, dispersal limitation, density dependence, spatial segregation, competition between regulate these patterns? Location The Qinling Mountains, north‐central China. Methods Ripley's K ‐function, D ‐function pair correlation function were applied to assess 15...

Abstract Non‐structural carbohydrates (NSCs) play an important functional role in determining plant survival as a backup carbon (C) source, while they also represent large C sink being traded off against other sinks when facing stress. However, information regarding how such trade‐offs allocation under stress vary among species remains limited. Here, we experimentally induced juveniles of three tree by exposing them to situ artificial shading, and then quantified the dynamics whole‐tree...

Topography strongly influences the compositional structure of tree communities and plays a fundamental role in classifying habitats. Here, data topography 16 dominant species abundance were collected fully mapped 25-ha forest plot Qinling Mountains north-central China. Multivariate regression trees (MRT) used to categorize habitats, habitat associations examined using torus-translation test. The relative contributions topographic spatial variables total community also by variation...

Biodiversity conservation has long been a subject of extreme interest to community ecologists, with particular focus on exploring the underlying causes species diversity based niche and neutral theories. This study aims identify potential determinants in deciduous broad-leaved forest transitional region from subtropical temperate climate China. We collected woody plant data environmental variables fully mapped 25-ha permanent plot, partitioned beta-diversity into local contributions (LCBD)...

Trees at their upper range limits are highly sensitive to climate change, and thus alpine treelines worldwide have changed recruitment patterns in response warming. However, previous studies focused only on daily mean temperature, neglecting the asymmetric influences of daytime nighttime warming recruitments treelines. Here, based compiled dataset tree series from 172 across Northern Hemisphere, we quantified compared different effects treeline using four indices temperature sensitivity,...

Seedling stage has long been recognized as the bottleneck of forest regeneration, and biotic abiotic processes that dominate at seedling largely affect dynamics forest. Seedlings might be particularly vulnerable to climate stress, so elucidating role interannual variation in fostering community is crucial understanding response change. Using survival data 69 woody species collected for five consecutive years from a 25-ha permanent plot temperate deciduous forest, we identified effects...

Abstract Carbon allocation has been fundamental for long‐lived trees to survive cold stress at their upper elevation range limit. Although carbon between non‐structural carbohydrate (NSC) storage and structural growth is well‐documented, it still remains unclear how ongoing climate warming influences these processes, particularly whether two processes will shift in parallel or respond divergently warming. Using a combination of an situ downward‐transplant experiment ex chamber treatment, we...

The subcomponent self-assembly of 4,6-dihydrazinopyrimidine and o-vanillin/salicylaldehyde with different DyIII salts leads to the formation Dy2 (1-3) grid-like Dy4 (4) compounds formulas [Dy2L(DMF)4(NO3)4]·2DMF (1), [Dy2L2(CH3COO)4(CH3OH)2]·10H2O (2), [Dy2L'2(CH3COO)4(CH3OH)2]·2H2O·2CH3OH (3) [Dy4Na2L2(μ2-OH)2(PhCOO)8(CH3OH)(H2O)]·CH3CN·2CH3OH·7H2O (4). In all cases, ions are nine coordinate but features coordinated solvent molecules anions result in diverse coordination geometries their...

Research Article| June 01 2010 Biological origins and annual variations of earthy-musty off-flavours in the Xionghe Reservoir China Ting Zhang; Zhang 1State Key Laboratory Freshwater Ecology Biotechnology, Institute Hydrobiology, Chinese Academy Sciences, Wuhan 430072, China2College Animal Science Technology, Hunan Agriculture University, Changsha 410128, Search for other works by this author on: This Site PubMed Google Scholar Lin Li; Li Tel.: +86-27-68780806 Fax: +86-27-68780871...

Nonstructural carbohydrates (NSC, including soluble sugars and starch) are essential for supporting growth survival of woody plants, play multifunctional roles in various ecophysiological processes that being rapidly changed by climate warming. However, it still remains unclear whether there is a consistent response pattern NSC dynamics plants to warming across organ types species taxa. Here, based on compiled database 52 plant worldwide, we conducted meta-analysis investigate the effects...

Vegetation dynamics are simultaneously regulated by climate change and anthropogenic activities. Since the 1980s, has been warming on Tibetan Plateau (TP) at a rate higher than North Hemisphere average. Anthropogenic activities, including grazing, farming, urbanization, also influencing alpine ecosystem TP. Especially, an ensemble of large engineering projects, such as power transported from west to east State Grid, in operation While studies disentangling effects activities interference...

Abstract Cold‐adapted trees display acclimation in both carbon source and sink capacity to low‐temperature stress at their upper elevational range limits. Hence a balanced source–sink might be required for persistence survival the tree The present study examined spatial dynamics of relationship subalpine fir ( Abies fargesii ) along gradients northern slope temperate region southern subtropics terms climate Qinling Mountain range, north‐central China. results showed that non‐structural...

Understanding how tree individuals allocate whole-tree total nonstructural carbohydrate (NSC) between growth and storage is key to reveal the response of altitudinal treeline climate warming. Yet, modellings carbon allocation currently ignore local adaptation under cold stress. We used a reciprocal transplant experiment an experimental warming treatment identify whether low temperature causes genetic differentiation in species Larix chinensis. The results show that ratio (R-value) which...

Summary Understanding limiting factors of phenotypic plasticity is essential given its critical role in shaping biological adaptation and evolution changing environments. It has been proposed that the pattern correlation could constrain trait plasticity. However, interplay between integration remained contentious. We experimentally simulated climate warming juveniles three subalpine tree species by exposing them to three‐year situ open‐top chambers (OTCs), then measured functional 72...