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Filters: Department: "Biology" Collection: "ir_uspace" Date: "1988"
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CreatorTitleDescriptionSubjectDate
1 Bohs, Lynn A.Four new species of Cyphomandra (Solanaceae) from South AmericaFour new species in the Neotropical genus Cyphomandra are described and illustrated. Cyphomandra pilosa and C. foetida are found on the eastern slopes of the Andes from Colombia to Peru. Cyphomandra oblongifolia is a morphologically variable species of Suriname and the Amazon basin. Cyphomandra sib...Cyphomandra1988
2 Davidson, Diane W.Pruning of host plant neighbors by ants: an experimental approachSome ants of myrmecophytic plants either obligately or facultatively prune vegetation surrounding their host trees. Pruning behavior occurs at higher frequency in ants with sting defenses than in those with chemical defenses, which may generally convey an advantage in aggressive encounters between a...Allelopathy; Allomerus demararae; Ant-plant interactions; Ants; Cordia nodosa; Crematogaster; Mutualism; Peru; Plant-animal interaction; Pseudomyrmex; Triplaris americana1988
3 Davidson, Diane W.Ecological studies of neotropical ant-gardensIn a census taken in Peru's Manu National Park, 10 epiphytic angiosperms from seven plant families established principally on arboreal carton-ant nests. These "ant gardens" (AGs) were most often inhabited by parabiotic ants, Camponotus femoratus and Crematogaster cf. limata parabiotica, whose polygy...Ant competition; Ant garden; Ant-plant interaction; Coadaptation; Epiphyte; Mutualism; Parabiosis; Preadaptation; Peru; Seed dispersal; Tropical rainforest1988
4 Bastiani, MichaelCentral projections of the stretch receptor neurons of crayfish: structure, variation, and postembryonic growthEach stretch receptor neuron (SR) of the crayfish abdomen projects from its peripherally located soma an axon that enters the CNS through the second nerve (N2) of its segmental ganglion. CoZ+ backfills of N2 revealed that this axon bifurcates, sending one branch to the brain and the other to the te...Abdomen; Axon; Ganglion1988
5 Sperry, John S.Seasonal occurrence of xylem embolism in sugar maple (Acer saccharum)Xylem embolism, the reduction of water flow by air-filled vessels, was measured in a stand of 5- to 8-year-old sugar maple (Acer saccharum Marsh.) saplings growing in a nursery bed in northwestern Vermont. Embolism was quantified as percentage loss in hydraulic conductivity of trunk and branch seg...Xylem pressure; root pressure; dye perfusion1988
6 Hughes, Kelly T.Phase variation in Salmonella: analysis of Hin recombinase and hix recombination site interaction in vivoThe bacteriophage P22-based challenge phase selection was used to characterize the binding of Salmonella Hin recombinase to the wild-type hixL and hixR recombination sites, as well as to mutant and synthetic hix sequences in vivo. Hin recombinase binds to the hixL or hixR recombination sites and rep...1988
7 Bastiani, MichaelCentral projections of the stretch receptor neurons of crayfish: segmental gradients of synaptic probability and strengthThe 20 stretch receptor neurons (SRs) of the crayfish abdomen send axons into the CNS that then project both to the brain and to the last abdominal ganglion, G6 (Bastiani and Mulloney, 1988). In G6, we recorded intracellularly from different kinds of neurons postsynaptic to SR axons.Axons; Synapses; SR1988
8 Seger, JonEvolution of individuality by Leo W. BussMetazoans seldom reproduce vegetatively; they often die of cancer; and they almost always sequester their germ lines. Plants often reproduce vegetatively, seldom die of cancer, and almost never sequester a germ line. Buss argues that these and many other patterns can all be understood in a unified w...Cell lines; Hierarchy; Biology1988
9 Davidson, Diane W.Comparative structure of harvester ant communities in arid Australia and North AmericaIn the Australian arid zone, the species richness of ants is greater and that of mammalian granivores is less than in North American deserts. This study aimed to determine if the structure of harvester ant communities differs from that seen in North American deserts, focussing on differences relate...Species; Rodents; Diversity1988
10 Seger, JonParasites and sexParasites of many kinds have long been recognized as important regulators of population size (e.g., May, 1983b), but only during the last decade or two have they been widely viewed as the protagonists in fast-paced (and long-running) evolutionary thrillers involving subtle features of the biochemis...Cost of sex1988
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