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Transporting Biodiversity Using Transmission Power Lines as Stepping-Stones

The most common ecological response to climate change is the shifts in species distribution ranges. Nevertheless, landscape fragmentation compromises the ability of limited dispersal species to move following these climate changes. Building connected environments that enable species to track climate changes is an ultimate goal for biodiversity conservation. An experiment was conducted to determine if electric power transmission lines could be transformed in a continental network of biodiversity reserves for small animals. The study analysed if the management of the habitat located inside the base of the transmission electric towers (providing refuge and planting seedlings of native shrub) allowed to increase local richness of target species (i.e., small mammals and some invertebrates' groups). The results confirmed that by modifying the base of the electric transmission towers density and diversity of several species of invertebrates and small mammals increased as well as number of birds and bird species, increasing local biodiversity. The study suggests that modifying the base of the electric towers would potentially facilitate the connection of fragmented populations. This idea would be easily applicable in any transmission line network anywhere around the world, making it possible for the first time to build up continental scale networks of connectivity. informacion[at]ebd.csic.es: Ferrer et al (2020) Transporting Biodiversity Using Transmission Power Lines as Stepping-Stones? Diversity 12(11): 439; https://doi.org/10.3390/d12110439

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https://www.mdpi.com/1424-2818/12/11/439
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Solar and terrestrial radiations explain continental-scale variation in bird pigmentation

Solar and terrestrial radiations explain continental-scale variation in bird pigmentation

Animals living on the earth's surface are protected from the damaging effects of solar ultraviolet (UV) radiation by melanin pigments that color their integument. UV levels that reach the earth's surface vary spatially, but the role of UV exposure in shaping clinal variations in animal pigmentation has never been tested. Here it is shown at a continental scale in Europe that golden eagles Aquila chrysaetos reared in territories with a high solar UV-B radiation exposure deposit lower amounts of the sulphurated form of melanin (pheomelanin) in feathers and consequently develop darker plumage phenotypes than eagles from territories with lower radiation exposure. This clinal variation in pigmentation is also explained by terrestrial gamma radiation levels in the rearing territories by a similar effect on the pheomelanin content of feathers, unveiling natural radioactivity as a previously unsuspected factor shaping animal pigmentation. These findings show for the first time the potential of solar and terrestrial radiations to explain pigmentation phenotype diversity in animals, including humans, at large spatial scales. informacion[at]ebd.csic.es: Galván et al (2018) Solar and terrestrial radiations explain continental-scale variation in bird pigmentation. Oecologia Doi 10.1007/s00442-018-4238-8


https://link.springer.com/article/10.1007/s00442-018-4238-8