the alien polychaetes are widely distributed in the whole mediterranean sea as well as in theegyptian waters. the objective of this study is to highlight the distribution and abundance of the alienpolychaetes along the alexandria coast, their contribution to the total polychaete community and the changesthey caused in the community structure. through monthly sampling polychaetes were collected ...

Non-native plants that can cause adverse effects are otherwise known as invasive alien plant species which pose a major threat to plant biodiversity conservation and sustainability. This study is dedicated to determine the plant diversity and to assess the vulnerability of Quezon Protected Landscape, Southern Luzon, the Philippines to invasive alien plant species. Data from 90 10x10 m randomly ...

Biological invasion The process by which an organism is introduced to, and establishes a sustainable population in, a region beyond its native range. Eradication The managed extirpation of an entire nonnative population. Impact The effect of a nonnative species on its environment. Invasibility The vulnerability of a habitat, community, or ecosystem to invasion. Invasion ecology A multidisciplin...

Invasive species are characterized by their substantial population growth and spread outside their native ranges. Humans originally introduced most of today’s invasive species, and all regions on Earth have been affected by invasive species to some extent. Curiously, 90% or more of introduced species do not become invasive pests; rather, they die out or rely on direct human assistance to achiev...

An invasive species is one that arrives (oftenwith human assistance) in a habitat it had not previously occupied, then establishes a population and spreads autonomously. Species invasions are one of the main conservation threats today and have caused many species extinctions. The great majority of such invasions are by species introduced from elsewhere, although some native species have become ...