We explore the thesis that stochasticity in successional-disturbance systems can be an agent of species extinction.The analysis uses a simple model of patch dynamics for seral stages in an idealized landscape; each seral stage is assumed to support a specialist biota.The landscape as a whole is characterized by a mean patch Play Mat birth rate, mea
The conservation status of relic melanistic lizard species occurring in the Saldanha- Langebaan area has been investigated.A contact zone between one melanistic form and a closely related non-melanistic form has been 5 Inch examined in detail.Apart from melanis- tic populations of the girdled lizards, Cordylus niger and C.polywnus, a melanistic mor
Purpose: The organs of the foregut are supplied by the celiac trunk, which branches into the common hepatic artery, splenic artery, and left gastric artery.The common hepatic artery further divides into the proper hepatic and the gastroduodenal arteries.The superior mesenteric artery usually supplies midgut Play Mat components.Here we document a no