A concept of dynamic keystone species is proposed based on simulation studies of replicator equations. We report that the variables of this equation can be categorized into three groups based on their individual dynamic behaviour.

Abstract: This paper discussed the keystone species concept and introduced the typical characteristics of keystone species and their identification in communities or ecosystems. Based on the research of the keystone species, the concept of species importance (SI) was first advanced in this paper

Forest invader replaces predation but not

Student: “Librarians are very smart people. They definitely have IQs” Academic librarians, and those who benefit from their specialized knowledge and skills, understand the essential

1. The case is made for recognition of the marine bivalve Limaria hians as a reef-forming species, which plays a key architectural role in certain benthic communities around the United Kingdom and Ireland. 2. This species uses byssal threads to construct nests that can coalesce to form reefs

The demise of the Nile crocodile (Crocodylus niloticus) as a

referred to as a ‘‘molecule of keystone significance’ ’ in reference to Robert Paine’s Keystone Species Concept. Pisaster ochraceus, the predator upon which Paine’s concept was founded, inhabits waters regularly plagued by harmful algal blooms, but the effects of STX on Pisaster have not yet been inves

that I. typographus fulfils the majority of criteria for a keystone species, particularly that of maintenance of biodiversity in forests. Our results emphasize the value for the study and conservation of insect diversity of the policy of non-interference with natural processes pursued in some protected

) was 0.30 year-1. Growth performance index value of P. rustica (Ø’) was 2.64, among the lowest ranges reported for limpet species. Patella rustica shells were degraded to different degrees by microbial bioerosion. The damage was most often restricted to the oldest parts of the shell, i.e. apex

pelagic species, trichiurids, and Merluccius hubbsi. Demersal species, such as Ctenosciaena gracilicirrhus, and flatfish were also present. An ecosystem network model is updated through which a mixed-trophic impact matrix and “keystone-ness ” indicators were calculated. Loligo plei represents an important