BACKGROUND Although numerous studies model species distributions, these models are almost exclusively on single species, while studies of evolutionary lineages are preferred as they by definition study closely related species with shared history and ecology. Hermit spiders, genus Nephilengys, represent an ecologically important but relatively species-poor lineage with a globally allopatric dist...

C.H. Greenberg et al. (eds.), Sustaining Young Forest Communities, Managing Forest Ecosystems 21, DOI 10.1007/978-94-007-1620-9_1, © US Government 2011 Abstract There is a rising concern among natural resource scientists and managers about decline of the many plant and animal species associated with early successional habitats. There is no concise definition of early successional habitats. Howe...

cerebral coenurosis is the intermediary larval stage of taenia multiceps , which affects intermediate hosts, particularly sheep and goats. in this report, gross and microscopic features of three scarce natural coenurosis cases, a oneyear-old ram and two lambs of 7 month old from a flock are explained. atnecropsy, numerous small cysts measuring 5 to 10 mm in diameter were observed on both cerebr...

satureja sahendica bornm. is an endemic medicinal plant which grows wild in natural habitats of west and north-west regions of iran. in this study, for domestication of satureja sahendica and study it's essential oil content and composition, the seeds of seven populations were collected from natural habitats and cultivated in three replications as a complete randomized blocks design. the a...

miankaleh biosphere reserve it has a set of marine and land ecosystems an area about 67349 ha and is located in the north of iran and southeast farthermost of caspian sea. the diversity of the natural characteristics of caspian region is the cause of diversity in the habitats, and has resulted in nesting of most plant species in the germinative range. regarding the importance of coastal ecosyst...

Addition of man-made structures alters abiotic and biotic characteristics of natural habitats, which can influence abundances of biota directly and/or indirectly, by altering the ecology of competitors or predators. Marine epibiota in modified habitats were used to test hypotheses to distinguish between direct and indirect processes. In Sydney Harbour, kelps on pier-pilings supported greater co...

during the last years the total cost of lng technology has decreased significantly due to improvements of the liquefaction process. however, many liquefaction plants that are still in operation use a three-cascade refrigeration system. in this paper, an advanced exergetic analysis is applied to better understand the operation of a three-cascade refrigeration system for liquefaction of natural g...