Natural factors but not anthropogenic factors affect native and non–native mammal distribution in a Brazilian National Park

Protected areas, designed for biodiversity conservation, are currently affected by invasive species as most of them have documented biological invasions. This study aimed to test whether non–native mammal species richness influences the local distribution of native mammals and how distance from human settlement, elevation and vegetation characteristics influence native and non–native mammal richness in a national park in Brazil.We recorded 20 mammal species in the park, 17 native species and three non–native species. Native mammal richness was higher at intermediate elevations and in forests with lower tree densities and tree basal area. Non–native mammal richness was greater at higher elevations and in forests with low tree densities. Non–native mammals did not influence native mammal presence. In conclusion, the distribution of both native and non–native mammal species was affected by elevation and vegetation but not by distance from human settlements or non–native mammal presence.

Atlas of Marine Mammal Distribution and Abundance in Mexican Waters

Marine mammals are a group of charismatic megafauna, capable of awakening fascination in most people, which makes them especially visible when natural resources or ecosystems are exploited, as is the case with the generation of energy using the sea. There are 131 species of marine mammals in the world, including whales, dolphins, sea lions, seals, walruses, sea otters, polar bears, manatees and dugongs. Mexico’s marine environment is megadiverse, with 38 cetacean species (eight mysticeti or baleen whale species, 30 odontoceti or toothed whale species, dolphins and porpoises), four pinnipeds (two seal species and two sea lion species), one sea otter sub-species and one manatee subspecies (