Responses of soil nitrogen and phosphorus cycling to drying and rewetting cycles: A meta-analysis

Soil Biology and Biochemistry, Journal Year: 2020, Volume and Issue: 148, P. 107896 - 107896

Published: July 4, 2020

Language: Английский

---

Climate Disruption of Plant-Microbe Interactions

Annual Review of Ecology Evolution and Systematics, Journal Year: 2020, Volume and Issue: 51(1), P. 561 - 586

Published: Sept. 4, 2020

Interactions between plants and microbes have important influences on evolutionary processes, population dynamics, community structure, ecosystem function. We review the literature to document how climate change may disrupt these ecological interactions develop a conceptual framework integrate pathways of plant-microbe responses over different scales in space time. then create blueprint aid generalization that categorizes effects into changes context dependency pairs, temporal mismatches altered feedbacks time, or spatial accompany species range shifts. pair new graphical model influence resistance with statistical approach predictthe consequences increasing variability climate. Finally, we suggest through which can affect resilience during recovery from disruption. Throughout, take forward-looking perspective, highlighting knowledge gaps directions for future research.

Language: Английский

---

Inactive and inefficient: Warming and drought effect on microbial carbon processing in alpine grassland at depth

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(10), P. 2241 - 2253

Published: Feb. 5, 2021

Abstract Subsoils contain >50% of soil organic carbon (SOC) globally yet remain under‐investigated in terms their response to climate changes. Recent evidence suggests that warmer, drier conditions alpine grasslands induce divergent responses SOC decomposition and accrual top‐ versus subsoils. However, longer term effects on microbial activity (i.e., catabolic respiration vs. anabolic growth) belowground cycling are not well understood. Here we utilized a field manipulation experiment the Qinghai‐Tibetan Plateau conducted 110‐day incubation with without 13 C‐labeled grass litter assess microbes' role as both “decomposers” “contributors” (0–10 cm) subsoils (30−40 after 5 years warming drought treatments. Microbial mineralization added was examined tandem potential extracellular enzyme activities, while biomass synthesis necromass accumulation were analyzed using phospholipid fatty acids amino sugars coupled C analysis, respectively. We found and, lesser extent, decreased ratio inorganic nitrogen (N) water‐extractable subsoil, intensifying N limitation at depth. Both reduced which may also be related limitation, evidenced by lower hydrolase (especially leucine aminopeptidase) efficiency (lower relative respiration). none these observed topsoil, suggesting microbes became inactive inefficient subsoil but topsoil environments. Given increasing productivity this grassland under warming, elevated root deposits diminished contribute new subsoil. sustainability plant growth persistence pools deserve further investigation long term, given aggravated

Language: Английский

---

Microbial resistance and resilience in response to environmental changes under the higher intensity of human activities than global average level

Global Change Biology, Journal Year: 2020, Volume and Issue: 26(4), P. 2377 - 2389

Published: Jan. 13, 2020

Abstract With the increasing intensity of global human activities, ecosystem function, which is supported by microbial community, will be dramatically changed and impaired. To investigate resistance resilience communities to we chose two typical types disturbances, urbanization, reclamation under higher activities than average level. We examined traits, including abundance, diversity, phylogeny, co‐occurrence interactions in soil communities, together with nitrification observed subtropical coastal Pearl River Estuary microcosm experiments. Microbial were less resistant environmental changes caused urbanization those reclamation, was significantly reflected nitrogen and/or carbon‐related patterns. However, most traits could recovered almost original level without significant differences after 40 days incubation. The between nitrifiers other not completely recovered, but this change did affect their for balancing ammonium during recovery stage, suggesting that might have fewer effects on previously thought. This study quantitatively demonstrated as a whole can recover status similar state short time removal stress at large scale even ecosystems, implied strong capacity community intense disturbance.

Language: Английский

---

Soil microbial legacies differ following drying-rewetting and freezing-thawing cycles

The ISME Journal, Journal Year: 2021, Volume and Issue: 15(4), P. 1207 - 1221

Published: Jan. 6, 2021

Abstract Climate change alters frequencies and intensities of soil drying-rewetting freezing-thawing cycles. These fluctuations affect water availability, a crucial driver microbial activity. While these are leaving imprints on microbiome structures, the question remains if legacy one type weather fluctuation (e.g., drying-rewetting) affects community response to other freezing-thawing). As both phenomenons give similar availability fluctuations, we hypothesized that cycles have effects microbiome. We tested this hypothesis by establishing targeted microcosm experiments. created exposing samples or cycle (phase 1), followed an additional 2). measured respiration analyzed structures. Across experiments, larger CO2 pulses changes in structures were observed after rewetting than thawing. Drying-rewetting affected emissions upon following cycle. Conversely, did not Our results suggest stronger communities production pattern is mediated sustained

Language: Английский

---

Drought Stress Memory at the Plant Cycle Level: A Review

Plants, Journal Year: 2021, Volume and Issue: 10(9), P. 1873 - 1873

Published: Sept. 10, 2021

Plants are sessile organisms whose survival depends on their strategy to cope with dynamic, stressful conditions. It is urgent improve the ability of crops adapt recurrent stresses in order alleviate negative impacts productivity. Although our knowledge plant adaptation drought has been extensively enhanced during last decades, recent studies have tackled responses stresses. The present review synthesizes major findings from addressing multiple events, and demonstrates plants memorize stress. Stress memory described as a priming effect allowing different response reiterated stress when compared single event. Here, by specifically focusing water at cycle level, we describe underlying processes molecular, physiological morphological levels well model species Arabidopsis thaliana. Moreover, conceptual analysis framework proposed study memory. Finally, essential role interactions between soil microorganisms emphasized because plasticity can play key supporting overall resilience.

Language: Английский

---

Meta-analysis of the impact of freeze–thaw cycles on soil microbial diversity and C and N dynamics

Soil Biology and Biochemistry, Journal Year: 2022, Volume and Issue: 168, P. 108608 - 108608

Published: March 4, 2022

Language: Английский

---

Deciphering the plant microbiome to improve drought tolerance: Mechanisms and perspectives

Environmental and Experimental Botany, Journal Year: 2022, Volume and Issue: 201, P. 104933 - 104933

Published: May 27, 2022

Language: Английский

---

What happens after drought ends: synthesizing terms and definitions

New Phytologist, Journal Year: 2022, Volume and Issue: 235(2), P. 420 - 431

Published: April 4, 2022

Drought is intensifying globally with climate change, creating an urgency to understand ecosystem response drought both during and after these events end limit loss of functioning. The literature replete studies how ecosystems respond drought, yet there are far fewer focused on dynamics ends. Furthermore, while the terms used describe can be variable inconsistent, so those that responses following drought. With this review, we sought evaluate create clear definitions ecologists use post-drought responses. We found legacy effects, resilience recovery were most commonly respect responses, but variable. Based our review literature, propose a framework for generalizing ends, which refer as 'the period'. suggest future papers need clearly characteristics imposed encourage authors term period general encompasses ends other more specific descriptors period.

Language: Английский

---

High intensity perturbations induce an abrupt shift in soil microbial state

The ISME Journal, Journal Year: 2023, Volume and Issue: 17(12), P. 2190 - 2199

Published: Oct. 9, 2023

Soil microbial communities play a pivotal role in regulating ecosystem functioning. But they are increasingly being shaped by human-induced environmental change, including intense "pulse" perturbations, such as droughts, which predicted to increase frequency and intensity with climate change. While it is known that soil sensitive perturbations effects can be long-lasting, remains untested whether there threshold the of trigger abrupt persistent transitions taxonomic functional characteristics communities. Here we demonstrate experimentally pulses drought equivalent 30-year event (<15% WHC) induce major shift community characterised significantly altered bacterial fungal structures reduced complexity functionality. Moreover, this transformed persisted after returning its previous moisture status. As result, found had strong legacy effect on function, inducing an enhanced growth rate following subsequent drought. Abrupt widely documented aquatic terrestrial plant response perturbations. Our findings also occur high pulse potentially deleterious consequences for health.

Language: Английский

---