Malaria - World Health Organization (WHO) There are 5 Plasmodium parasite species that cause malaria in humans and 2 of these species – P falciparum and P vivax – pose the greatest threat P falciparum is the deadliest malaria parasite and the most prevalent on the African continent P vivax is the dominant malaria parasite in most countries outside of sub-Saharan Africa
Endangered Species - National Geographic Society When a species population declines by at least 20 percent within five years or two generations, it is also classified as endangered 4) Population restrictions A species is categorized as endangered when its population is restricted to less than 250 mature individuals When a species’ population is this low, its area of occupancy is not
African elephant species now Endangered and Critically . . . Gland, Switzerland, 25 March 2021 (IUCN) - Following population declines over several decades due to poaching for ivory and loss of habitat, the African forest elephant (Loxodonta cyclotis) is now listed as Critically Endangered and the African savanna elephant (Loxodonta africana) as Endangered on the IUCN Red List of Threatened Species™ Before today’s update, African elephants were
Richards-Zawacki Lab – Ecology, Evolutionary Biology, and . . . About us: The Richards-Zawacki Lab is interested in many aspects of the ecology, evolutionary biology, and conservation of amphibians The ongoing research in our lab has two main goals: (1) clarifying the ecological and evolutionary processes that lead to adaptation, population divergence and speciation, and (2) understanding how host behavior and environmental variation affect the occurrence
Pollinator Decline - an overview | ScienceDirect Topics A recent study indicates that worldwide, between 2006 and 2015, 25% fewer species of wild bees were seen than was the case before 1990 [6 •] The European Red List for bees shows that the populations of 46% of Europe’s bumblebees (the best studied subgroup) are declining [ 7 ]