Tropical tree growth driven by dry-season climate variability

Nature Geoscience, Journal Year: 2022, Volume and Issue: 15(4), P. 269 - 276

Published: March 31, 2022

Language: Английский

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Younger trees in the upper canopy are more sensitive but also more resilient to drought

Nature Climate Change, Journal Year: 2022, Volume and Issue: 12(12), P. 1168 - 1174

Published: Dec. 1, 2022

Language: Английский

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Encroachment diminishes herbaceous plant diversity in grassy ecosystems worldwide

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(18), P. 5532 - 5546

Published: July 11, 2022

Abstract Woody encroachment is ubiquitous in grassy ecosystems worldwide, but its global impacts on the diversity of herbaceous plants that characterise and define these remain unquantified. The pervasiveness relatively easily observed via remote sensing, plant richness below canopy can only be field‐based studies. Via a meta‐analysis 42 field studies across tropical to temperate ecosystems, we quantified how altered species richness, forbs, C 3 graminoids 4 graminoids. Across studies, natural logarithm response ratio (lnRR) ranged from −3.33 0.34 with 87% encroached negatively impacted. Assessment extent encroachment, duration mean annual rainfall, latitude, continent demonstrated had relevance data (univariate model including random effect study explained 45.4% variance). weighted lnRR decreased −0.245 at <33% woody cover increase, −0.562 33%–66%, −0.962 >66%. Continued results substantial loss medium high extents, not replaced. Although all functional groups are significantly impacted by forb more sensitive than graminoid richness. no geographic or climatic correlates data, as an emergent product change coalesces decrease ground layer light availability, lead fire grazers, alter hydrology soils. Encroachment accelerating require urgent attention determine critical thresholds facilitate diverse resilient ecosystems.

Language: Английский

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Recording chemical changes in an urban environment: a dendrochemical study of Ceiba speciosa (A. St.-Hil.) Ravenna (Malvaceae) in the Atlantic Forest

Dendrochronologia, Journal Year: 2025, Volume and Issue: unknown, P. 126286 - 126286

Published: Jan. 1, 2025

Language: Английский

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Intra-annual xylem formation dynamics of Castanopsis hystrix and its response to climate in southern Guangxi, China

Dendrochronologia, Journal Year: 2025, Volume and Issue: unknown, P. 126303 - 126303

Published: Feb. 1, 2025

Language: Английский

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Tropical forests in the Americas are changing too slowly to track climate change

Science, Journal Year: 2025, Volume and Issue: 387(6738)

Published: March 6, 2025

Understanding the capacity of forests to adapt climate change is pivotal importance for conservation science, yet this still widely unknown. This knowledge gap particularly acute in high-biodiversity tropical forests. Here, we examined how Americas have shifted community trait composition recent decades as a response changes climate. Based on historical trait-climate relationships, found that, overall, studied functional traits show shifts less than 8% what would be expected given observed However, recruit assemblage shows 21% relative expectation. The most diverse Earth are changing but at rate that fundamentally insufficient track change.

Language: Английский

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The importance of tropical tree-ring chronologies for global change research

Quaternary Science Reviews, Journal Year: 2025, Volume and Issue: 355, P. 109233 - 109233

Published: March 6, 2025

Language: Английский

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Reduced resilience of terrestrial ecosystems locally is not reflected on a global scale

Communications Earth & Environment, Journal Year: 2021, Volume and Issue: 2(1)

Published: May 13, 2021

Abstract Global climate change likely alters the structure and function of vegetation stability terrestrial ecosystems. It is therefore important to assess factors controlling ecosystem resilience from local global scales. Here we over past 35 years using early warning indicators calculated normalized difference index data. On a scale find that reduced ecosystems in 64.5% vegetated area. Temperature had greater influence on than precipitation, while mean state variability. However, there no evidence for decreased ecological larger Instead, warming increased spatial asynchrony which buffered global-scale impacts resilience. We suggest response scale-dependent influenced by scale.

Language: Английский

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Age and spatial distribution of the world's oldest trees

Conservation Biology, Journal Year: 2022, Volume and Issue: 36(4)

Published: March 15, 2022

Abstract Extremely old trees have important roles in providing insights about historical climatic events and supporting cultural values, yet there has been limited work on their global distribution conservation. We extracted information 197,855 tree cores from 4854 sites combined it with other age (e.g., the OLDLIST) data a further 156 to determine of world's oldest quantify factors influencing distribution. found that extremely >1000 years were rare. Among 30 individual exceeded 2000 old, 27 occurred high mountains. modeled maximum climatic, soil topographic, anthropogenic variables, our regression models demonstrated elevation, human population density, carbon content, mean annual temperature key determinants trees. Specifically, model predicted many will occur high‐elevation, cold, arid mountains disturbance. This pattern was markedly different tallest trees, which more likely relatively mesic productive locations. Global warming expansion activities may induce rapid declines New strategies, including targeted establishment conservation reserves remote regions, especially those western parts China United States, are required protect these

Language: Английский

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Tropical and subtropical dendrochronology: Approaches, applications, and prospects

Ecological Indicators, Journal Year: 2022, Volume and Issue: 144, P. 109506 - 109506

Published: Sept. 29, 2022

Tropical and subtropical forests cover only 7 % of the Earth’s land surface. Yet, they host nearly half global tree density with a high species number (∼40,000 species), store up to 25 terrestrial carbon represent one-third net primary productivity on Earth. Over last four decades, study growth in tropics has gained substantial momentum, not least because increasing application tropical climatology, ecology, geomorphology, archaeology. So far, various have been shown form rings regular, sometimes annual, layering that is driven by species’ sensitivity climatic, ecological, or geodynamic variations. Here, we provide detailed review dendrochronology studies indicating their (i) patterns, (ii) most common regions studied preferentially families genera trees employed frequently, so as an overview suitable species, (iii) approaches techniques used dendrochronology, (iv) different applications, (v) limitations inherent tree-ring research tropics. The paper concludes call for further this still understudied environment provides potential perspectives future work biodiverse region world.

Language: Английский

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