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Santa Olalla, the largest lagoon in Doñana, dries up for the second year in a row
Since the Doñana Biological Station has kept records, the lagoon has never dried up two consecutive summers. Severe drought and overexploitation of the aquifer are the causes of the serious situation of the Doñana dune lagoon system
Genetic variability of red swamp crayfish reveals its invasion process
Patterns of genetic diversity in invasive populations can be modulated by a range of factors acting at different stages of the invasion process, including the genetic composition of the source population(s), the introduction history (e.g. propagule pressure), the environmental suitability of recipient areas, and the features of secondary introductions. The North American red swamp crayfish, Procambarus clarkii, is one of the most widely introduced freshwater species worldwide. It was legally...
Humans shape distribution and habitat use of an opportunistic scavenger
Research focused on evaluating how human food subsidies influence the foraging ecology of scavenger species is scarce but essential for elucidating their role in shaping behavioral patterns, population dynamics, and potential impacts on ecosystems. This study evaluates the potential role of humans in shaping the year?round distribution and habitat use of individuals from a typical scavenger species, the yellow?legged gull (Larus michahellis), breeding at southwestern Spain.
Human impact is changing the way biodiversity is organized
Zoogeographical regions, or zooregions, are areas of the Earth defined by species pools that reflect ecological, historical and evolutionary processes acting over millions of years. Consequently, researchers have assumed that zooregions are robust and unlikely to change on a human timescale. However, the increasing number of human?mediated introductions and extinctions can challenge this assumption.