Why is Tree Drought Mortality so Hard to Predict?

Trends in Ecology & Evolution, Год журнала: 2021, Номер 36(6), С. 520 - 532

Опубликована: Март 2, 2021

Язык: Английский

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Widespread woody plant use of water stored in bedrock

Nature, Год журнала: 2021, Номер 597(7875), С. 225 - 229

Опубликована: Сен. 8, 2021

Язык: Английский

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Vertical decoupling of soil nutrients and water under climate warming reduces plant cumulative nutrient uptake, water‐use efficiency and productivity

New Phytologist, Год журнала: 2021, Номер 230(4), С. 1378 - 1393

Опубликована: Фев. 7, 2021

Warming-induced desiccation of the fertile topsoil layer could lead to decreased nutrient diffusion, mobility, mineralization and uptake by roots. Increased vertical decoupling between nutrients in water availability subsoil/bedrock layers under warming thereby reduce cumulative over growing season. We used a Mediterranean semiarid shrubland as model system assess impacts warming-induced on plant water- nutrient-use patterns. A 6 yr manipulative field experiment examined effects (2.5°C), rainfall reduction (30%) their combination soil resource utilization Helianthemum squamatum shrubs. drier ('growth pool') led greater proportional from deeper, wetter, but less ('maintenance plants. This was linked uptake, increased nonstomatal (nutritional) limitation photosynthesis reduced water-use efficiency, above-ground biomass growth drought survival. Whereas shift stored deep may buffer negative impact transpiration, this plastic response cannot compensate for associated carbon assimilation, which compromise capacity plants adjust warmer climate.

Язык: Английский

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Tree water uptake patterns across the globe

New Phytologist, Год журнала: 2024, Номер 242(5), С. 1891 - 1910

Опубликована: Апрель 22, 2024

Plant water uptake from the soil is a crucial element of global hydrological cycle and essential for vegetation drought resilience. Yet, knowledge how distribution depth (WUD) varies across species, climates, seasons scarce relative to our aboveground plant functions. With literature review, we found that average WUD varied more among biomes than functional types (i.e. deciduous/evergreen broadleaves conifers), illustrating importance hydroclimate, especially precipitation seasonality, on WUD. By combining records rooting with WUD, observed consistently deeper maximum largest differences in arid regions - indicating deep taproots act as lifelines while not contributing majority uptake. The most ubiquitous observation was woody plants switch sources layers highest availability within short timescales. Hence, seasonal shifts occur globe when shallow soils are drying out, allowing continued transpiration hydraulic safety. While there still significant gaps understanding consistency ecosystems allows integration existing into next generation process models.

Язык: Английский

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Relative water content consistently predicts drought mortality risk in seedling populations with different morphology, physiology and times to death

Plant Cell & Environment, Год журнала: 2021, Номер 44(10), С. 3322 - 3335

Опубликована: Июль 12, 2021

Predicted increases in forest drought mortality highlight the need for predictors of incipient drought-induced (DIM) risk that enable proactive large-scale management. Such should be consistent across plants with varying morphology and physiology. Because their integrative nature, indicators water status are promising candidates real-time monitoring DIM, particularly if they standardize morphological differences among plants. We assessed extent to which physiology between Pinus ponderosa populations influence time predictive power key DIM risk. Time differed but occurred at same relative content (RWC) potential (WP). RWC WP were accurate These results variables related capture critical thresholds during associated dehydration processes. Both assessments is special interest because it allows comparisons different morphologies can remotely sensed. Our offer promise landscape-level its global impacts near term.

Язык: Английский

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A comprehensive review on coupled processes and mechanisms of soil-vegetation-hydrology, and recent research advances

Science China Earth Sciences, Год журнала: 2022, Номер 65(11), С. 2083 - 2114

Опубликована: Сен. 19, 2022

Язык: Английский

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Soil water dynamics and groundwater evolutions of check dams under natural rainfall reduction in semi-arid areas

Journal of Hydrology, Год журнала: 2023, Номер 617, С. 129099 - 129099

Опубликована: Янв. 7, 2023

Язык: Английский

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Bedrock Vadose Zone Storage Dynamics Under Extreme Drought: Consequences for Plant Water Availability, Recharge, and Runoff

Water Resources Research, Год журнала: 2022, Номер 58(4)

Опубликована: Апрель 1, 2022

Abstract Bedrock vadose zone water storage (i.e., rock moisture) dynamics are rarely observed but potentially key to understanding drought responses. Exploiting a borehole network at Mediterranean blue oak savanna site—Rancho Venada—we document how capacity in deeply weathered bedrock profiles regulates woody plant availability and groundwater recharge. The site is the Northern California Coast Range within steeply dipping turbidites. In wet year (water 2019; 647 mm of precipitation), moisture was quickly replenished characteristic capacity, recharging that emerged springs generate streamflow. subsequent rainless summer growing season, depleted by about 93 mm. two years followed (212 121 precipitation) total amount gained each winter 54 20 mm, respectively, declines were documented exceeding these amounts, resulting progressively lower content. Oaks, which rooted into bedrock, demonstrated signs stress drought, including reduced transpiration rates extremely low potentials. 2020–2021 precipitation did not exceed variable belowground storage, increased stress, no recharge or runoff. Rock deficits (rather than soil deficits) explain

Язык: Английский

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Seasonal variations in water uptake and transpiration for plants in a karst critical zone in China

The Science of The Total Environment, Год журнала: 2022, Номер 860, С. 160424 - 160424

Опубликована: Ноя. 25, 2022

Язык: Английский

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Topographic and climatic effects on Pinus halepensis s.l. growth at its drought tolerance margins under climatic change

Journal of Forestry Research, Год журнала: 2024, Номер 35(1)

Опубликована: Июнь 15, 2024

Abstract Under global warming, drought will reduce productivity of Pinus halepensis s.l. (subspecies and brutia ) cause a retreat from its rear edge distribution (latitudinal/elevational) in the Mediterranean. To test whether topography can influence this scenario, we studied for approximately 40 years growth six natural pine stands water-limited habitats on islands Zakinthos Samos (eastern Mediterranean Greece), determined critical moisture sources that drove growth. Dominant pines were selected with no permanent water under contrasting conditions created by (“wet”-gulley/valley vs. “dry”-upslope habitats). The responses P. to moderate worst case scenario tested, projected warming (approx. − 25% 40% annual precipitation compared 1961–1990 average). Our results show “wet” habitat had higher normal wet climate. However, more declined, tree was reduced at significantly faster rate, but also showed recovery, once rainfall returned. Thus, populations gullies/valleys, may be resilient less likely towards elevation/latitudes dry upslope sites. drought, both ecosystems relied deeper pools supplied previous 3–6 (including year growth). valley/gully soils (and probably heavily weathered bedrock), appeared utilize surface winter/spring efficiently survival recovery. deep provide key “buffer” such could act as potential refugia climate change.

Язык: Английский

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