Asymmetric warming among elevations may homogenize plant α-diversity and aboveground net primary production of alpine grasslands

Han, Fusong; Yu, Chengqun; Fu, Gang

doi:10.3389/fevo.2023.1126651

Cited by 6 publications

(8 citation statements)

References 44 publications

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“…Third, the effect of warming on forage nutrition quality can vary with local climate conditions and warming magnitude [ 2 , 5 ]. Spatial asymmetrical warming may homogenize plant production and diversity [ 43 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Climate Change and Fencing on Forage Nutrition Quality of Alpine Grasslands in the Northern Tibet

Zhang,

Dai,

Dawaqiongda

et al. 2023

Plants

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How climate change and fencing will affect forage nutrition quality of alpine grasslands is still unknown in the Northern Tibet. Here, we reported the effects of climate change and fencing on forage nutrition quality (i.e., CP: crude protein, ADF: acid detergent fiber, NDF: neutral detergent fiber, Ash: crude ash, EE: ether extract and DTS: dissolvable total sugar) in alpine grasslands across the Northern Tibet based on a transect survey dataset from 2018. Over the whole survey transect, fencing reduced the NDF content by 5.15% and the EE content by 15.79%, but did not affect forage nutrition quality (R2 = 0.04, p = 0.389). Air temperature and precipitation explained 24% and 8% of variation in the CP content under the fencing conditions, respectively. Precipitation explained 22% of variation in the NDF content under the fencing conditions. The CP content decreased and increased exponentially with increasing air temperature under the fencing and grazing conditions, respectively. The NDF content showed logarithmic and negative relationships with precipitation under the fencing and grazing conditions (−8.45 vs. −6.68lnNDF). The response of the CP content to fencing showed negative relationships with temperature and the response of AGB to fencing, but showed a positive relationship with precipitation. The CP and DTS contents showed negative relationships with AGB under the fencing and grazing conditions. In contrast, the ADF content showed a positive relationship with AGB. The response of AGB, SR and community composition to fencing explained 11%, 56% and 35% of variation in the response of forage nutrition quality to fencing, respectively. Therefore, climate change may not always have adverse effects on forage nutrition quality, whereas fencing may not always have favorable effects on forage nutrition quality. Fencing and climate change can have an interactive effect on forage nutrition quality. Fencing can alter the temperature and precipitation sensitivities of forage nutrition quality. In colder and wetter regions, the forage nutrition quality may be more responsive to fencing. There may be a trade-off between forage nutrition quality and quantity. Compared to the change in AGB caused by fencing, the changes in species α-diversity and community composition caused by fencing can have greater effects on the response of forage nutrition quality to fencing. Local climate conditions and the trade-offs between forage nutrition quality and biomass should be considered when evaluating the effects of fencing on the restoration of degraded grassland plants.

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Section: Discussionmentioning

confidence: 99%

Effects of Climate Change and Fencing on Forage Nutrition Quality of Alpine Grasslands in the Northern Tibet

Zhang,

Dai,

Dawaqiongda

et al. 2023

Plants

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“…There were three plant functional groups: sedge, graminoids, and forbs. Aboveground net primary production of sedge, graminoids, and forbs (i.e., ANPP sedge , ANPP graminoid and ANPP forb ) was estimated using observed coverage and height of plant function groups [5], respectively. ANPP sedge = −0.77 + 0.93Coverage − 0.24Height, R 2 = 0.95, p < 0.001, n = 120 (1)…”

Section: Community Investigation Anpp Estimation Soil Sampling and An...mentioning

confidence: 99%

“…Aboveground net primary productivity (ANPP) of plants is an important material basis for human survival, and biodiversity is an important guarantee to maintain a high Plants 2023, 12, 3017 2 of 29 and stable yield of ANPP [1][2][3]. Temperature and precipitation jointly regulate ANPP and plant diversity [4,5]. In the context of global warming and increased precipitation, a growing number of studies have explored the effects of climate warming [6,7], increased precipitation [8,9], or climate warming plus increased precipitation [10] on ANPP and plant diversity.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental warming and/or increased precipitation have negligible [10,11], positive [12,13], or negative effects on ANPP and/or plant diversity [14,15]. These diverse effects of warming and increased precipitation on ANPP and plant diversity are related to their distinct vegetation types, soil nutrition conditions, climatic conditions, and the magnitudes of warming or increased precipitation [5,13,[16][17][18][19][20][21]. Second, do ANPP and plant diversity respond nonlinearly to experimental warming and/or increased precipitation?…”

Section: Introductionmentioning

confidence: 99%

“…As a sensitive region to climate change, the responses of ANPP and plant diversity to climate change on the Tibetan Plateau are important indicators of the global responses of ANPP and plant diversity to climate change [26][27][28]. Under the background of the Qinghai-Tibet Plateau as a whole tending to be warmer and wetter [1,29,30], a great deal of studies have investigated the effects of climate warming and increased precipitation on ANPP and plant diversity [4,5], which can provide important basic data and scientific theories for the conservation of global plant diversity, the high-quality development of animal husbandry, etc. However, besides the above debates, two other problems remain unresolved.…”

Section: Introductionmentioning

confidence: 99%

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Response of Aboveground Net Primary Production, Species and Phylogenetic Diversity to Warming and Increased Precipitation in an Alpine Meadow

Xiao,

Yu,

2023

Plants

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The uncertain responses of aboveground net primary productivity (ANPP) and plant diversity to climate warming and increased precipitation will limit our ability to predict changes in vegetation productivity and plant diversity under future climate change and further constrain our ability to protect biodiversity and ecosystems. A long-term experiment was conducted to explore the responses of ANPP, plant species, phylogenetic α–diversity, and community composition to warming and increased precipitation in an alpine meadow of the Northern Tibet from 2014 to 2019. Coverage, height, and species name were obtained by conventional community investigation methods, and ANPP was obtained using observed height and coverage. Open–top chambers with two different heights were used to simulate low- and high-level climate warming. The low- and high-level increased precipitation treatments were achieved by using two kinds of surface area funnel devices. The high-level warming reduced sedge ANPP (ANPPsedge) by 62.81%, species richness (SR) by 21.05%, Shannon by 13.06%, and phylogenetic diversity (PD) by 14.48%, but increased forb ANPP (ANPPforb) by 56.65% and mean nearest taxon distance (MNTD) by 33.88%. Species richness, Shannon, and PD of the high-level warming were 19.64%, 9.67%, and 14.66% lower than those of the low-level warming, respectively. The high-level warming-induced dissimilarity magnitudes of species and phylogenetic composition were greater than those caused by low-level warming. The low- rather than high-level increased precipitation altered species and phylogenetic composition. There were significant inter-annual variations of ANPP, plant species, phylogenetic α–diversity and community composition. Therefore, climate warming and increased precipitation had non-linear effects on ANPP and plant diversity, which were due to non-linear changes in temperature, water availability, and/or soil nutrition caused by warming and increased precipitation. The inter-annual variations of ANPP and plant diversity were stronger than the effects of warming and especially increased precipitation on ANPP and plant diversity. In terms of plant diversity conservation and related policy formulation, we should pay more attention to regions with greater warming, at least for the northern Tibet grasslands. Besides paying attention to the responses of ANPP and plant diversity to climate change, the large inter-annual changes of ANPP and plant diversity should be given great attention because the large inter-annual variation indicates the low temporal stability of ANPP and plant diversity and thus produces great uncertainty for the development of animal husbandry.

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Investigating net primary production in climate regions of Khuzestan Province, Iran using CASA model

Afzali,

Hadian,

Sabri

et al. 2024

Int J Biometeorol

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This study aimed to investigate the vegetation production changes in Khuzestan province, Iran using MODIS data production, meteorological data, vegetation maps as well as topographic and field monitoring data in CASA model. The study area was divided into different climatic classes based on multivariate statistical method, so the vegetation of each climatic region was examined separately for changes in NPP values. Production changes due to degradation were calculated using the Miami model and subsequently, the rain use efficiency (RUE) and the light use efficiency (LUE) and correlation indices between the CASA model and ground data were determined. The results of this study (R2) showed that the accuracy of this model varies depending on the type of climatic regions (R2 = 80 to R2 = 15). In different climatic regions, the rate of NPP changes (very humid 68 gC/m2 to ultra-dry 15 gC/m2) varies in rangeland types. The highest rate of vegetation production is observed seasonally in May. Degradation conditions also reduced RUE and LUE.However, in hyper-arid regions, adaptations of plants in some different species (Hammada sp.) increase their efficiency compared to other vegetation types. The results showed the importance of vegetation and climate classification in vegetation production studies.

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Asymmetric warming among elevations may homogenize plant α-diversity and aboveground net primary production of alpine grasslands

Cited by 6 publications

References 44 publications

Effects of Climate Change and Fencing on Forage Nutrition Quality of Alpine Grasslands in the Northern Tibet

Effects of Climate Change and Fencing on Forage Nutrition Quality of Alpine Grasslands in the Northern Tibet

Response of Aboveground Net Primary Production, Species and Phylogenetic Diversity to Warming and Increased Precipitation in an Alpine Meadow

Investigating net primary production in climate regions of Khuzestan Province, Iran using CASA model

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