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Regional response of grassland productivity to changing environment conditions influenced by limiting factors
- Source :
- PLoS ONE, PLoS ONE, Vol 15, Iss 10, p e0240238 (2020)
- Publication Year :
- 2020
- Publisher :
- Public Library of Science, 2020.
-
Abstract
- Regional differences and regulatory mechanisms of vegetation productivity response to changing environmental conditions constitute a core issue in macroecological researches. To verify the main limiting factors of different macrosystems [temperature-limited Tibetan Plateau (TP), precipitation-limited Mongolian Plateau (MP), and nutrient-limited Loess Plateau (LP)], we conducted a comparative survey of the east-west grassland transects on the three plateaus and explored the factors limiting regional productivity and their underlying mechanisms. The results showed that aboveground net primary productivity (ANPP) of LP (109.10 ± 16.76 g m-2 yr-1) was significantly higher than that of MP (66.71 ± 11.11 g m-2 yr-1) and TP (57.02 ± 10.59 g m-2 yr-1). The response rate of ANPP with environmental changes was different among different plateaus, being closely related to the main limiting factors. On MP, this was precipitation, on LP it was temperature and nutrients, and on TP, it was non-specific, reflecting restriction by the extremely low temperature. After autocorrelation screening of environmental factors, different regions exhibited different productivity response mechanisms. MP was mainly influenced by temperature and precipitation, LP was influenced by temperature and nutrient, and TP was influenced by nutrient, reflecting the modifying effect of the main limiting factors. The effect of each regional environment on ANPP was 72.56% on average and only 27.18% after simple regional integration. The regional model could optimize the simulation error of the integrated model, and the relative deviations in MP, LP, and TP were reduced by 31.76%, 17.22%, and 2.23%, respectively. These findings indicate that the grasslands on the three plateaus may have different or even the opposite mechanisms to control productivity.
- Subjects :
- 0106 biological sciences
Atmospheric Science
010504 meteorology & atmospheric sciences
Pedology
Loess
Plant Science
01 natural sciences
Grassland
Nutrient
Snow
Biomass
Sedimentary Geology
Multidisciplinary
Plateau
geography.geographical_feature_category
Deserts
Ecology
Geography
Simulation and Modeling
Geology
Vegetation
Terrestrial Environments
Productivity (ecology)
Grasslands
Medicine
Research Article
Environmental Monitoring
Ecological Metrics
Science
Climate Change
Soil Science
Research and Analysis Methods
Poaceae
010603 evolutionary biology
Ecosystems
Animal science
Meteorology
Ecological Productivity
Tibetan Plateau
Ecosystem
Transect
Plant Communities
0105 earth and related environmental sciences
Petrology
geography
Plant Ecology
Ecology and Environmental Sciences
Primary production
Biology and Life Sciences
Earth sciences
Environmental science
Sediment
Geographic areas
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 15
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- PLoS ONE
- Accession number :
- edsair.doi.dedup.....1708b5d45097403f409fe36cdece9687