Pushing the limits of C3 intrinsic water use efficiency in Mediterranean semiarid steppes: Responses of a drought‐avoider perennial grass to climate aridification DOI Creative Commons
Wei Ren, Pablo García‐Palacios, Santiago Soliveres

и другие.

Functional Ecology, Год журнала: 2024, Номер 38(4), С. 955 - 966

Опубликована: Фев. 5, 2024

Abstract Intrinsic water use efficiency (WUEi) reflects the trade‐off between photosynthetic carbon gain and loss through stomatal conductance is key for understanding dryland plant responses to climate change. Stipa tenacissima a perennial tussock C 3 grass with an opportunistic, drought‐avoiding strategy that dominates arid semiarid steppes across western Mediterranean region. However, its ecophysiological aridification woody shrub encroachment, major land‐use change in drylands worldwide, are not well‐understood. We investigated variations leaf stable isotopes (δ 18 O, δ 13 C, 15 N), nutrient concentrations (N, P, K), culm content isotopic composition 2 H) of paired pure‐grass shrub‐encroached S. along 350 km aridity gradient Spain (10 sites, 160 individuals). Culm revealed shallow‐rooted depends heavily on recent rainwater uptake, which may render it vulnerable increasingly irregular rainfall combined faster topsoil drying under warming aridification. With increasing aridity, enhanced leaf‐level WUE i more stringent regulation flux assimilation (higher O), reaching exceptionally high values (−23‰ −21‰) at most steppes. Foliar N concentration was remarkably low sites regardless evidencing severe co‐limitation photosynthesis productivity. Shrub encroachment decreased P K but did affect status. Perennial cover markedly both declining winter suggesting population‐level rather than individual‐level these changes. The fundamental physiological constraints metabolism foliar hamper ability other drought‐avoider species shallow roots achieve further adaptive improvements climatic stress. A based early closure suppression during prolonged rainless periods thus compromise capacity maintain cover, sustain productivity cope ongoing drier parts their current distribution. Read free Plain Language Summary this article Journal blog.

Язык: Английский

Decomposition of Foliar Litter from Dominant Plants of Desert Riparian Forests in Extremely Arid Regions DOI Open Access
Xuewei Jiang, Fei Chen,

Jingjing Yang

и другие.

Forests, Год журнала: 2024, Номер 15(6), С. 949 - 949

Опубликована: Май 30, 2024

Litter decomposition is important for understanding the effects of habitat on nutrient cycling. In this study, we investigated characteristics, variability, and regulatory factors restricting rates leaf litter in three different habitats: a flood disturbance habitat, an arid high-salinity habitat. The habitats decreased following order: habit > organic carbon, total nitrogen, lignin residues during period were highest quality was main regulator release phosphorus cellulose residues, which exhibited processes patterns these habitats. coefficient negatively correlated with carbon residue habitats, lignocellulose index soil urease It positively area played significant role decomposition, while environmental dominant under high-salt conditions. both salt

Язык: Английский

Процитировано

2
Responses of the arbuscular mycorrhizal fungi community to warming coupled with increased drought in an arid desert region DOI Creative Commons
Ting Xie, Yu‐Wei Lin,

Xinrong Li

и другие.

Geoderma, Год журнала: 2023, Номер 441, С. 116744 - 116744

Опубликована: Дек. 14, 2023

Warming coupled with precipitation changes induced by climate change profoundly affect desert ecosystem functions in global drylands. Arbuscular mycorrhizal fungi (AMF) play a crucial role such ecosystems regulating energy and nutrient exchange. However, little is known about how AMF communities respond to warming reduced (W + RP). We evaluated the impacts of 0.5 °C 1.5 increase temperature 5 % 8 reductions total annual (0.5 W RP, RP) on main ecological processes structuring community assemblies rhizosphere soil typical winter plants Tengger Desert, northwest China. The results showed that could significantly alter composition, abundance, diversity communities. Both biomass increased RP treatment but decreased treatment. root colonization rate specific length, indicating trade-off between fine roots their symbiotic AMF. was phylogenetically random appeared clustered treatment, implying more pronounced can promote deterministic assembly community. provide conceptual framework for comprehending mechanisms underlying effects communities, incorporating biological geochemical processes. Overall, findings this study suggest abundance driving assemblages differently compared less intensive precipitation. Importantly, higher reduction plant dependence resulted stronger environmental filtration reducing water content.

Язык: Английский

Процитировано

6
Efficient vegetation restoration in Mu Us desert reduces microbial diversity due to the transformation of nutrient requirements DOI Creative Commons

Yu Zhouchang,

Wei Zhang, Liyun Zhang

и другие.

Ecological Indicators, Год журнала: 2023, Номер 154, С. 110758 - 110758

Опубликована: Авг. 5, 2023

Various nutrient requirements of soil microorganisms often occur in restoration ecosystems, but the responses microbial communities different vegetation types remain unclear. In this study, we selected four (grassland desert (GD), steppe (DS), typical (TS), and artificial forest (AF)) on Mu Us Desert, examined physicochemical properties, extracellular enzyme activities (carbon (C)-, nitrogen (N)-, phosphorus (P)-acquisition enzymes), community characteristics. Our results revealed that N-requirement area was higher than other elements, particularly when organic C scarce, whereas severe P requirement detected presence abundant matter. Compared with TS, a diversity GD, DS, AF, were dominated by few taxa loose internal connections N requirements. Stronger reduced relative abundance dominant increased stability bacterial communities. further indicate bacteria play more active role coping transformation When C- N-requirements transformed to P, sub-dominant decreased increased, respectively. Collectively, study efficient areas may lead stronger for microorganisms, thus reducing causing unpredictable consequences ecological sustainable development.

Язык: Английский

Процитировано

5
Contrasting Responses of Arbuscular Mycorrhizal Fungal Families to Simulated Climate Warming and Drying in a Semiarid Shrubland DOI
María del Mar Alguacil, Klaus Schlaeppi, Álvaro López‐García

и другие.

Microbial Ecology, Год журнала: 2021, Номер 84(3), С. 941 - 944

Опубликована: Окт. 4, 2021

Язык: Английский

Процитировано

11
Pushing the limits of C3 intrinsic water use efficiency in Mediterranean semiarid steppes: Responses of a drought‐avoider perennial grass to climate aridification DOI Creative Commons
Wei Ren, Pablo García‐Palacios, Santiago Soliveres

и другие.

Functional Ecology, Год журнала: 2024, Номер 38(4), С. 955 - 966

Опубликована: Фев. 5, 2024

Abstract Intrinsic water use efficiency (WUEi) reflects the trade‐off between photosynthetic carbon gain and loss through stomatal conductance is key for understanding dryland plant responses to climate change. Stipa tenacissima a perennial tussock C 3 grass with an opportunistic, drought‐avoiding strategy that dominates arid semiarid steppes across western Mediterranean region. However, its ecophysiological aridification woody shrub encroachment, major land‐use change in drylands worldwide, are not well‐understood. We investigated variations leaf stable isotopes (δ 18 O, δ 13 C, 15 N), nutrient concentrations (N, P, K), culm content isotopic composition 2 H) of paired pure‐grass shrub‐encroached S. along 350 km aridity gradient Spain (10 sites, 160 individuals). Culm revealed shallow‐rooted depends heavily on recent rainwater uptake, which may render it vulnerable increasingly irregular rainfall combined faster topsoil drying under warming aridification. With increasing aridity, enhanced leaf‐level WUE i more stringent regulation flux assimilation (higher O), reaching exceptionally high values (−23‰ −21‰) at most steppes. Foliar N concentration was remarkably low sites regardless evidencing severe co‐limitation photosynthesis productivity. Shrub encroachment decreased P K but did affect status. Perennial cover markedly both declining winter suggesting population‐level rather than individual‐level these changes. The fundamental physiological constraints metabolism foliar hamper ability other drought‐avoider species shallow roots achieve further adaptive improvements climatic stress. A based early closure suppression during prolonged rainless periods thus compromise capacity maintain cover, sustain productivity cope ongoing drier parts their current distribution. Read free Plain Language Summary this article Journal blog.

Язык: Английский

Процитировано

1