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Articles 4921 - 4950 of 10756
Full-Text Articles in Botany
Feeding Habitats Of Spring-Migrating Blackbirds In East-Central South Dakota, Richard S. Sawin, George M. Linz, William J. Bleier, H. Jeffrey Homan
Feeding Habitats Of Spring-Migrating Blackbirds In East-Central South Dakota, Richard S. Sawin, George M. Linz, William J. Bleier, H. Jeffrey Homan
The Prairie Naturalist
Between March 27 and April 21, 1998, we monitored blackbird (Icteridae) activity and habitat selection at a migratory staging area in east-central South Dakota. We used fixed-area observation points located within 20 l-km2 circular plots centered on four wetland basins that were used as night roosts. Each roost was surveyed four times, with the surveys spread evenly throughout the blackbird migration. We recorded the number of blackbird flocks, flock size and composition, habitat used, and behavior (e.g., loafing and feeding). Fifty percent (n = 242) of the 482 flocks recorded in the quadrats was observed loafing in trees …
The Prairie Naturalist, Volume 38, Number 2, June 2006, Elmer J. Finck, Hilary Gillock
The Prairie Naturalist, Volume 38, Number 2, June 2006, Elmer J. Finck, Hilary Gillock
The Prairie Naturalist
The Prairie Naturalist (June 2006) Volume 38, Issue 2, full issue.
Feeding Habitats of Spring-Migrating Blackbirds in East-central South Dakota, by Richard S. Sawin, George M. Linz, William J. Bleier, and H. Jeffrey Homan, pages 73-84.
Brood Break-up and Juvenile Dispersal of Lesser Prairie-chicken in Kansas, by James C. Pitman , Brent E. Jamison, Christian A. Hagen, Robert J. Robel, and Roger D. Applegate, pages 74-99.
Population Biology of Pumpkinseed in Enemy Swim Lake, South Dakota, by Eric J. Weimer and Michael L. Brown, pages 101-111.
Reproductive Development in the Sicklefin Chub in the Missouri and Lower Yellowstone Rivers, by …
Viola Rafinesquii Greene, Gordon C. Tucker
Acer Rubrum Wats., Kerry Barringer
Morella Pensylvanica (Mirb.) Kartesz, Kerry Barringer
Morella Pensylvanica (Mirb.) Kartesz, Kerry Barringer
Specimens by Name
No abstract provided.
Dodecatheon Meadia L., Loy R. Phillippe
Parthenocissus Quinquefolia (L.) Planch., John E. Ebinger
Parthenocissus Quinquefolia (L.) Planch., John E. Ebinger
Specimens by Name
No abstract provided.
Corallorhiza Wisteriana Conrad, John E. Ebinger
Corallorhiza Wisteriana Conrad, John E. Ebinger
Specimens by Name
No abstract provided.
Viola Affinis Leconte, Gordon C. Tucker
Viola Affinis Leconte, Gordon C. Tucker
Viola Sororia Willd., Gerry Moore
Acer Negundo L., Gordon C. Tucker
Acer Rubrum Wats., Gordon C. Tucker
Claytonia Virginica L., Gerry Moore
First Record Of The Spurge Hawkmoth As A Pollen Vector For The Western Prairie Fringed Orchid [Notes], Carla R. Jordan, Gerald M. Fauske, Mrion O. Harris, Darla Lenz
First Record Of The Spurge Hawkmoth As A Pollen Vector For The Western Prairie Fringed Orchid [Notes], Carla R. Jordan, Gerald M. Fauske, Mrion O. Harris, Darla Lenz
The Prairie Naturalist
Identification of pollen vectors is one step in refining management plans for a threatened plant such as the western prairie fringed orchid (Platanthera praeclara Sheviak and Bowles). Pollen vector bionomics, phenology, and ethology must be understood to assess this moth and other potential pollinators relative to orchid reproductive success. Also, the ability of spurge hawkmoth (Lepidoptera: Sphingidae), a recently introduced species, to act as a pollen vector for an obligate prairie plant, the western prairie fringed orchid, in theoretical terms, provides evidence which contradicts long held tenets of one-to-one correspondence between orchids and their pollinators. Further research might shed …
The Prairie Naturalist, Volume 38, Number 1, March 2006, Elmer J. Finck, Hilary Gillock
The Prairie Naturalist, Volume 38, Number 1, March 2006, Elmer J. Finck, Hilary Gillock
The Prairie Naturalist
Fire History, Passerine Abundance, and Habitat on a North Dakota Drift Plain Prairie by Timothy J. Ludwick and Robert T. Murphy, pages 1-11
Bats in a Human-made Forest of Central Nebraska by Keith Geluso, pages 13-23
Effects of Predator Removal on Upland Nesting Ducks in North Dakota Grassland Fragments by Kristen D. Chodachek and Michael J. Chamberlain, pages 25-37
Estimates of Breeding Bird Populations in the Sheyenne National Grassland, North Dakota by Mary Ann Cunningham, Douglas H. Johnson, and Daniel N. Svingen, pages 39-56
Notes: First Record of the Spurge Hawkmoth as a Pollen Vector for the western Prairie Fringed …
Fire History, Passerine Abundance, And Habitat On A North Dakota Drift Plain Prairie, Timothy J. Ludwick, Robert K. Murphy
Fire History, Passerine Abundance, And Habitat On A North Dakota Drift Plain Prairie, Timothy J. Ludwick, Robert K. Murphy
The Prairie Naturalist
Prescribed fire is among key tools for restoring and managing prairies in the northern Great Plains, yet there are no published reports of its impacts on grassland passerine birds on native prairie in the Drift Plain, a major physiographic subregion. We examined relationships between prescribed fire history and abundance and habitat of breeding passerines in Drift Plain prairie at Des Lacs National Wildlife National Refuge in northwestern North Dakota. In 2003, we used point counts (n = 79 75 m radius plots) to survey bird abundance on 16 management units that had been prescribe-burned one to three times each …
Suggestions For Contributors And Editorial Policy (The Prairie Naturalist), Elmer J. Finck, Hilary Gillock
Suggestions For Contributors And Editorial Policy (The Prairie Naturalist), Elmer J. Finck, Hilary Gillock
The Prairie Naturalist
Suggestions for contributors and editorial policy for The Prairie Naturalist from March 2006, Volume 38, Issue 1.
Estimates Of Breeding Bird Populations In The Sheyenne National Grassland, North Dakota, Mary Ann Cunningham, Douglas Johnson, Daniel N. Svingen
Estimates Of Breeding Bird Populations In The Sheyenne National Grassland, North Dakota, Mary Ann Cunningham, Douglas Johnson, Daniel N. Svingen
The Prairie Naturalist
We conducted a two-year survey of breeding birds in the Sheyenne National Grassland, North Dakota, to estimate total populations of breeding birds. The Grassland is of interest because it provides wildlife habitat and recreational birding opportunities. Indicated breeding pairs were counted on 100-m wide belt transects during morning surveys from late May to early July in 2002 and 2003. We surveyed approximately 6 to 7% of the Grassland each year. The most abundant species in both years were grasshopper sparrow (Ammodramus savannarum), red-winged blackbird (Agelaius phoeniceus), claycolored sparrow (Spizella pallida), Savannah sparrow (Passerculus …
Effects Of Predator Removal On Upland Nesting Ducks In North Dakota Grassland Fragments, Kristen D. Chodachek, Michael J. Chamberlain
Effects Of Predator Removal On Upland Nesting Ducks In North Dakota Grassland Fragments, Kristen D. Chodachek, Michael J. Chamberlain
The Prairie Naturalist
Low nest success rates in the Prairie Pothole Region are attributed mainly to changes in the predator community coupled with reductions in availability of suitable nesting cover. We evaluated effects of removal of mammalian predators on pair density and nest success of ducks nesting on 259 ha sites in northeastern North Dakota during 2001 and 2002. We monitored pair density and duck nests on 10 sites with removal and 10 sites without removal. Overall nest success for both years was greater on trapped (53.4%) than nontrapped sites (28.7%). Pair densities were not affected by predator removal, but did increase across …
Molecular Phylogenetics Of Vandeae (Orchidaceae) And The Evolution Of Leaflessness, Barbara Carlsward, W. Whitten, Norris Williams, Benny Bytebier
Molecular Phylogenetics Of Vandeae (Orchidaceae) And The Evolution Of Leaflessness, Barbara Carlsward, W. Whitten, Norris Williams, Benny Bytebier
Faculty Research & Creative Activity
Members of tribe Vandeae (Orchidaceae) form a large, antropical clade of horticulturally important epiphytes. Monopodial leafless members of Vandeae have undergone extreme eduction in habit and represent a novel adaptation to the canopy environment in tropical Africa, Asia, and America. To study the evolution of monopodial leaflessness, molecular and structural evidence was used to generate phylogenetic hypotheses for Vandeae. Molecular analyses used sequence data from ITS nrDNA, trnL-F plastid DNA, and matK plastid DNA. Maximum parsimony analyses of these three DNA regions each supported two subtribes within monopodial Vandeae: Aeridinae and a combined Angraecinae þ Aerangidinae. Adding structural characters to …
Plants & Civilization; An Introduction To The Interrelationships Of Plants And People, James P. Smith Jr
Plants & Civilization; An Introduction To The Interrelationships Of Plants And People, James P. Smith Jr
Botanical Studies
No abstract provided.
The Fossil Record Of Basal Monocots, Ruth A. Stockey
The Fossil Record Of Basal Monocots, Ruth A. Stockey
Aliso: A Journal of Systematic and Floristic Botany
The fossil record of basal monocots (Acorales and Alismatales) extends back to the Cretaceous in the Northern Hemisphere. While many fossils were originally assigned to these basal groups, rigorous paleobotanical studies show many of them to be misidentified. Acarus fossils have been reliably reported from the Eocene while those of Alismatales extend back to the early Cretaceous. The fossil record of basal monocots is usually represented by leaves, fruits, and seeds; however, some localities preserve stems with attached leaves and roots and even whole plants. A detailed examination of leaf venation patterns in alismatids has recently allowed the description of …
Aperture Pattern And Microsporogenesis In Asparagales, Sophie Nadot, Laurent Penet, Leanne D. Dreyer, Arlette Forchioni, Adrienne Ressayre
Aperture Pattern And Microsporogenesis In Asparagales, Sophie Nadot, Laurent Penet, Leanne D. Dreyer, Arlette Forchioni, Adrienne Ressayre
Aliso: A Journal of Systematic and Floristic Botany
The aperture pattern of pollen grains is a character defined as the number, shape, and position of apertures. Although this character is highly variable in angiosperms, two states are particularly widespread. Pollen grains with one polar aperture occur frequently in basal angiosperms and monocots while tricolpate pollen is a synapomorphy of the eudicots. Many morphological characters are the result of a compromise between selective forces (acting on morphology) and developmental constraints (limiting the range of possible morphologies). To investigate what are the respective roles of development and selection in the determination of aperture pattern in angiosperms, we have chosen to …
The Operculum In Pollen Of Monocotyledons, Carol A. Furness, Paula J. Rudall
The Operculum In Pollen Of Monocotyledons, Carol A. Furness, Paula J. Rudall
Aliso: A Journal of Systematic and Floristic Botany
Within monocotyledons, monosulcate pollen is the predominant type and probably represents the plesiomorphic condition, but considerable variation occurs in sulcus morphology. An operculum is an exine thickening that covers most of an aperture. Monocot opercula are usually associated with sulci, although they can occur in ulcerate apertures, as in Poaceae. There are several other aperture types closely related to the monosulcate-operculate type, and confusion occurs in the palynological literature between monosulcate-operculate, pontoperculate, disulculate, disulcate, and zona-aperturate (zonasulculate or zonasulcate) pollen. Transmission electron microscopy (TEM) was used to determine the distribution of the thick apertural intine and to accurately identify these …
Robust Inference Of Monocot Deep Phylogeny Using An Expanded Multigene Plastid Data Set, Sean W. Grahan, Jessie M. Zgurski, Marc A. Mcpherson, Donna M. Cherniawsky, Jeffery M. Saarela, Elvira F. C. Horne, Selena Y. Smith, Winson A. Young, Heath E. O'Brien, Vincent L. Brown, J. Chris Pires, Richard G. Olmstead, Mark W. Chase, Hardeep S. Rai
Robust Inference Of Monocot Deep Phylogeny Using An Expanded Multigene Plastid Data Set, Sean W. Grahan, Jessie M. Zgurski, Marc A. Mcpherson, Donna M. Cherniawsky, Jeffery M. Saarela, Elvira F. C. Horne, Selena Y. Smith, Winson A. Young, Heath E. O'Brien, Vincent L. Brown, J. Chris Pires, Richard G. Olmstead, Mark W. Chase, Hardeep S. Rai
Aliso: A Journal of Systematic and Floristic Botany
We use multiple photosynthetic, chlororespiratory, and plastid translation apparatus loci and their associated noncoding regions (ca. 16 kb per taxon, prior to alignment) to make strongly supported inferences of the deep internal branches of monocot phylogeny. Most monocot relationships are robust (an average of ca. 91 % bootstrap support per branch examined), including those poorly supported or unresolved in other studies. Our data strongly support a sister-group relationship between Asparagales and the commelinid monocots, the inclusion of the orchids in Asparagales, and the status of Petrosaviaceae as the sister group of all monocots except Acorus and Alismatales. The latter finding …
Vegatative Architecture Of Desiccation-Tolerant Arborescent Monocotyledons, Stefan Porembski
Vegatative Architecture Of Desiccation-Tolerant Arborescent Monocotyledons, Stefan Porembski
Aliso: A Journal of Systematic and Floristic Botany
Within the monocotyledons the acquisition of the tree habit is enhanced by either primary growth of the axis or a distinctive mode of secondary growth. However, a few arborescent monocotyledons deviate from this pattern in developing trunks up to four meters high that resemble those of tree ferns, i.e., their "woody-fibrous" stems consist mainly of persistent leaf bases and adventitious roots. This type of arborescent monocotyledon occurs in both tropical and temperate regions and is found within Boryaceae (Borya), Cyperaceae (Afrotrilepis, Bulbostylis, Coleochloa, Microdracoides), and Velloziaceae (e.g., Vellozia, Xerophyta). They have developed in geographically widely separated regions …
Systematics Of Xanthorrhoeaceae Sensu Lato, With An Emphasis On Bulbine, Dion S. Devey, Ilia Leitch, J. Chris Pires, Yohan Pillon, Mark W. Chase
Systematics Of Xanthorrhoeaceae Sensu Lato, With An Emphasis On Bulbine, Dion S. Devey, Ilia Leitch, J. Chris Pires, Yohan Pillon, Mark W. Chase
Aliso: A Journal of Systematic and Floristic Botany
We provide here results of a combined analysis of plastid genes rbcL, matK, and ndhF for Xanthorrhoeaceae s.l., the Asphodelaceae/Xanthorrhoeaceae/Hemerocallidaceae clade, which are well supported by the DNA data. Xanthorrhoea (often treated as the sole member of Xanthorrhoeaceae) is sister to the hemerocallid clade (former Hemerocallidaceae); and the asphodelid clade (formerly Asphodelaceae) is sister to them both. For additional species of Bulbine and Jodrellia (both Asphodeloideae), we also collected rps16 intron and ITS nuclear ribosomal DNA sequences to better assess their relationships. Bulbine, with Jodrellia, embedded are sister to the collective genera of subfamily Alooideae in …
Molecular Phylogenetics Of Vandeae (Orchidaceae) And The Evolution Of Leaflessness, Barbara S. Carlsward, W. Mark Whitten, Norris H. Williams, Benny Bytebier
Molecular Phylogenetics Of Vandeae (Orchidaceae) And The Evolution Of Leaflessness, Barbara S. Carlsward, W. Mark Whitten, Norris H. Williams, Benny Bytebier
Faculty Research & Creative Activity
Members of tribe Vandeae (Orchidaceae) form a large, antropical clade of horticulturally important epiphytes. Monopodial leafless members of Vandeae have undergone extreme eduction in habit and represent a novel adaptation to the canopy environment in tropical Africa, Asia, and America. To study the evolution of monopodial leaflessness, molecular and structural evidence was used to generate phylogenetic hypotheses for Vandeae. Molecular analyses used sequence data from ITS nrDNA, trnL-F plastid DNA, and matK plastid DNA. Maximum parsimony analyses of these three DNA regions each supported two subtribes within monopodial Vandeae: Aeridinae and a combined Angraecinae þ Aerangidinae. Adding structural characters to …
Placing The Monocots: Conflicting Signal From Trigenomic Analyses, Melvin R. Duvall, Sarah Matthews, Neill Mohammad, Tammy Russel
Placing The Monocots: Conflicting Signal From Trigenomic Analyses, Melvin R. Duvall, Sarah Matthews, Neill Mohammad, Tammy Russel
Aliso: A Journal of Systematic and Floristic Botany
Despite recent significant advances in understanding angiosperm phylogeny, the position of monocots remains uncertain. We present here a phylogeny inferred from four genes that unambiguously unite monocots with eumagnoliids. A well-supported position for the monocots was obtained only after we replaced the available nuclear 18S rDNA sequence data with data from phytochrome C in a matrix that also included plastid rbcL and ndhF and mitochondrial atp1. Over 5000 base pairs of sequence data from 42 taxa were analyzed using Bayesian inference. The results of these analyses united monocots with the eumagnoliids in a well-supported clade. Although the …