Wood and leaf densities explain how forests function across the globe

Understanding ecosystem dynamics can lead to greater benefits in forest management, species conservation, and carbon sequestration. A new study puts forward results which can be generalized for the whole globe and to 53,000 tree species thanks to the large quantity of data gathered and analyzed.

Biodiversity @ca @en Competence Density Functional traits Geu @en Josep peñuelas @en Nature @en

Nothing can be understood without evolution…

This phrase is often repeated among biologists, but it is time for non-biologists to recognize the truth of this statement. In the opening session of this year's course at the Institute of Catalan Studies, Jordi Casanova explained that in the light of modern knowledge, we humans are animals, considering not only in our biology (an obvious fact) but also our behavior. Many studies, mostly on apes, have shown the existence of feelings such as jealousy, envy, a sense of for injustice, rebellion; to these I would add empathy, defense of hierarchy, and a wish power.

Agriculture Culture @en Emotions @en Global change Human behaviour @en Human evolution @en Jaume terradas @en Society

The tallest trees in tropical forests die from dehydration after extreme droughts

According to a study co-led by CREAF staff published this week in the journal Nature, droughts caused by climate change could result in the death of the tallest tress in tropical forests. For the first time, the scientists have shown that after prolonged water deficit tall trees suffer embolisms in their circulatory systems and die of dehydration. 

Climate change Drought Hydraulics Icrea @en Maurizio mencuccini @en Plant physiology

Singing in higher pitches is no guarantee of success for city birds

An international study with participation of CREAF has concluded that singing in higher pitches is no guarantee of success for city birds. This was after observing city-dwelling birds in around 20 cities worldwide, Barcelona being one of them. The researchers compared around 400 species and analyzed whether these were more abundant in their natural habitat or in urban areas.

Biodiversity Birdsong Daniel sol @en Invasions @en Maria moirón Survive_hirec @en Urban birds Urban ecology

Birds and butterflies are key indicators for the measurement of biodiversity loss

According to a study in which CREAF participated, the populations of birds or butterflies living in open habitats have been negatively affected by the loss of field and scrubland habitat. Conversely, species which live in forests have been favored. These variations were related with changes in the Catalonian (and Mediterranean) landscape over the last few decades. 

Barcelona natural sciences museum Biodiversidad @en Birds Butterflies Climate change Constanti stefanescu @en Ctfc @en Global change Granollers natural sciences museum Ico @en Land use changes Lluis brotons @en Monitoring networks Sergi herrando @en

Natural communities

When I studied the subject of ecology at the University of Barcelona, about the years 1964-65 (fifty years ago!), Margalef was our teacher. Even though he was still not a university professor but the director of the Fisheries Research Institute of the CSIC (now Institute of Marine Sciences) where he concentrated his research. The ecology classes were at the building of the University Square, the practices at the Institute. There was by then only a book on ecology, by G.L.

Coexistence Communities Competence Ecology Jaume terradas @en Populations Ramon margalef @en