Posts

In Chicago, annual changes in tree canopy cover are associated with trends in all-cause mortality. Photo: Warren LeMay CC BY-SA 2.0Warren LeMay CC BY-SA 2.0

Crucial trees: urban canopy loss drives up mortality rates

,
A research conducted in Chicago links increased tree canopy cover to lower mortality. Protecting mature trees is more effective than planting new ones, the study has found 
The study analyzed the response of forests in the Yangtze River Basin to the exceptional climate event of summer 2022. Photo: Tom Jarrett, Attribution-NonCommercial-ShareAlike 2.0 Generic (CC BY-NC-SA 2.0) DeedTom Jarrett, Attribution-NonCommercial-ShareAlike 2.0 Generic (CC BY-NC-SA 2.0) Deed

Heat and drought: natural forests resist better, planted forests recover faster

,
A Yangtze Basin study reveals a trade-off between resistance and recovery in forests: biodiversity and structure protect natural forests, while young, fast-growing trees promote recovery in planted forests
Xerothermic grassland at Clifton Meadow, in the United Kingdom: an ecosystem in which high plant biodiversity helps to improve resilience to drought events. Photo: Steve Daniels Attribution-ShareAlike 2.0 Generic CC BY-SA 2.0 DeedSteve Daniels Attribution-ShareAlike 2.0 Generic CC BY-SA 2.0 Deed

Extreme drought: biodiversity helps grasslands, but not forests

,
An international study finds that high biodiversity levels can reduce productivity losses in the driest grasslands during extreme drought events. However, the same pattern is not found in forested areas
For decades, geomorphologists have been trying to understand how Arctic terraces form spontaneously, as a result of the extremely slow movement of surface ground caused by permafrost thawing. Photo: Hannes Grobe Attribution-ShareAlike 2.5 Generic CC BY-SA 2.5 DeedHannes Grobe Attribution-ShareAlike 2.5 Generic CC BY-SA 2.5 Deed

A fluid could explain the mystery of permafrost terraces

,
For decades, scientists have struggled to explain how Arctic permafrost terraces form spontaneously. A new model suggests that their origin may lie in the same physical principles that generate waves in complex fluids
Cotton cultivation in the Mississippi Delta region. In this area, water management and soil fertility are key challenges for agricultural sustainability. Photo: Chris Light, Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)Chris Light, Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)

Cover crops and reduced tillage cut water demand in cotton fields

,
A Mississippi State University study shows that cover crops and conservation tillage increase soil water retention, reducing and sometimes even eliminating the need for supplemental irrigation
Signs of wildfire damage in a tropical forest in Botucatu, São Paulo State, Brazil. While the consequences of large-scale deforestation are well documented, the effects of degradation in forests have remained much less certain until now. Photo: Thyrome, CC BY 4.0.Thyrome, CC BY 4.0.

New database reveals the climate cost of degradation in tropical forests

,
Researchers have synthesized nearly four decades of data, producing one of the most comprehensive assessments ever compiled of forest carbon dynamics following disturbances and during subsequent regeneration
The slender extensions of chloroplasts have been revealed as a sophisticated cellular communication system, essential for plant survival under conditions of extreme heat, soil salinity, or drought. Photo: pxhere, CC0 Public Domain. Free for personal and commercial use. No attribution requiredpxhere, CC0 Public Domain. Free for personal and commercial use. No attribution required

The tiny “fingers” that help plants survive stress

, ,
Una ricerca tedesca chiarisce il ruolo degli stromuli delle piante, i sottili prolungamenti dei cloroplasti che trasmettono segnali di stress al nucleo della cellula e attivano le difese contro caldo, siccità e salinità
Brazilian Amazon. In the future, the forest's ability to restore normal emissions of biogenic volatile organic compounds may become progressively impaired. Photo: Neil Palmer/CIAT. Attribution-NonCommercial-NoDerivs 2.0 Generic (CC BY-NC-ND 2.0).Photo: Neil Palmer/CIAT. Attribution-NonCommercial-NoDerivs 2.0 Generic (CC BY-NC-ND 2.0).

When El Niño-related drought strikes, Amazon forest turns to chemical self-defense

,
A study shows how the rainforest altered its volatile compound emissions during the most severe drought ever recorded in the Amazon, triggering a mechanism with implications for the atmosphere
Experimental Salicornia plots at the International Center for Biosaline Agriculture. The global phenomenon of soil salinization has spurred research into natural strategies that can increase plant resilience. Photo: Charbel El Khouri - International Center for Biosaline Agriculture, CC BY-SA 4.0Photo: Charbel El Khouri - International Center for Biosaline Agriculture, CC BY-SA 4.0

Here is how soil bacteria can save crops from salinization

,
An international study has identified soil bacteria that naturally boost plants' resistance to soil salinization stress. The discovery opens up new opportunities for an agriculture that relies less on fertilizers
In the south-western United States, climate change and the build-up of plant matter are fuelling increasingly extreme wildfires. Photo: Eric Coulter, Public Domain Mark 1.0 UniversalEric Coulter, Public Domain Mark 1.0 Universal

In California, the most devastating wildfires are the new normal

,
Uno studio mostra come il cambiamento climatico e la gestione delle foreste abbiano trasformato la natura prevalente degli incendi. Dal 2012 sono più comuni i roghi ad alta intensità, con conseguenze ambientali ed economiche sempre più gravi