uliginosum provided strong support for the GLH and carbon limitation hypothesis, respectively. Organ dependence of NSC with increasing elevation in Betula trees provided partial support for the GLH, while R. ermanii in NSC, ratios of soluble sugars to starch in leaves, and leaf mass per area. At the treeline, shrubs had higher values than B. NSC concentrations in each organ significantly increased with increasing elevation for R. An elevational increase and decrease in NSC were observed in leaves and woody organs, respectively, of B.
Species growth consistently decreased with increasing elevation, while NSC concentrations responded differently to elevation between trees and shrubs. Results showed that in the treeline ecotone soil temperature was lower than tree canopy air temperature due to unobvious aerodynamic decoupling near the ground. We determined growth and non-structural carbohydrate (NSC) concentrations in organs with increasing elevation at the mid-growing season. We investigated carbon (C) storage in deciduous treeline species Betula ermanii (Erman’s birch) and two dominant shrubs (deciduous Vaccinium uliginosum and evergreen Rhododendron aureum), which naturally grow next to each other at the treeline ecotone on Changbai Mountain, Northeast China. The functional difference between trees and alpine low-stature shrubs may hold answers, as shrubs grow well at higher elevations. Overall ensuring the effective long-term management of the aquatic ecosystems at hand.Although the growth limitation hypothesis (GLH) is the most accepted physiological explanation for alpine treeline formation, the debate about its formation mechanisms still remains controversial due to contradictory findings from different studies. Our team of scientists have a dynamic and holistic approach to ecological resource management. This means we strive to provide our clients with the highest quality of scientific services at a competitive cost. Our company goal is to provide aquatic ecological services using the most recent scientific methodologies and innovations. We partner with a diverse and dynamic array of ecological specialists and now offer an expansive suite of ecological services in the fields of zoology, botany, hydrology, soil, GIS modelling, aerial surveying and mapping. While our primary focus is freshwater ecology and aquatic monitoring, we have grown to expand our services in other ecological fields. These include wetland ecology, aquatic ecology, aquatic health, biomonitoring, ecotoxicology and water quality. Keeping Integrated Water Resource Management in mind we offer technical and specialist services in a number of fields. The company was formed with the view of offering services related to Integrated Water Resource Management, in order to assist clients with focused freshwater ecology and water quality studies. Ecotone Freshwater Consultants CC was established in 2008 to provide specialist aquatic ecological services to the mining, agricultural, industrial and tourism sectors.
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