5,286 research outputs found
Sticherus peruvianus Smith, Kessler & Gonzales 1999
No full textSticherus peruvianus (Maxon) Smith, Kessler & Gonzales (1999: 260) Gleichenia peruviana (Maxon) Lellinger (1989: 45). Dicranopteris peruviana Maxon (1943:133). Type: — PERU. Huánuco: Playapampa, Macbride 4510 (holotype F, isotype US). Distribution and ecology: —Andes of southern Ecuador (Loja, Zamora-Chinchipe), Peru, and Bolivia. Common, forming dense colonies in cloud forests, elfin forests, or on exposed ridges at 2000–3400 m.Published as part of Gonzales, Jasivia & Kessler, Michael, 2011, A synopsis of the Neotropical species of Sticherus (Gleicheniaceae), with descriptions of nine new species, pp. 1-54 in Phytotaxa 31 on page 42, DOI: 10.11646/phytotaxa.31.1.1, http://zenodo.org/record/489464
Taxonomical and distributional notes on Polylepis (Rosaceae)
No full textAbstractPolylepis pacensis M. Kessler & Schmidt-Leb. spec. nov. is described; P. flavipila (Bitter) M. Kessler & Schmidt-Leb., P. incarum (Bitter) M. Kessler & Schmidt-Leb., P. lanata (Kuntze) M. Kessler & Schmidt-Leb., and P. subtusalbida (Bitter) M. Kessler & Schmidt-Leb. are elevated from subspecies or varietal to species rank; P. triacontandra Bitter is reinstated as a species. The accompanying Electronic Supplement provides an updated key to species in Polylepis, and reports extensions to the known distribution ranges of three additional species of the genus.See also Electronic Supplement at: http://www.senckenberg.de/odes/06-01.ht
Terpsichore contacta Moguel & M. Kessler 2009, comb. nov.
No full textTerpsichore contacta (Copel.) Moguel & M. Kessler, comb. nov. Basionym:— Ctenopteris contacta Copeland (1955 [1956]: 477). Type:— BOLIVIA: Yungas, 1890, Bang 483 (holotype, US!; isotypes, B!, F, K!, N!). This species is characterised by conspicuously linear pinnae with parallel margins, leading to a pectinate aspect. Further peculiarities are the thin-chartaceous texture of the pinnae and the glabrous or one-ciliate sporangia. Terpsichore contacta is most similar to T. laxa (Presl, 1825: 23) Smith (1993: 487) but the latter has linear-deltate pinnae and abundantly ciliate sporangia. This is an epiphyte in the wet montain Yungas forests, from 1500 m to 2300 m in Peru and Bolivia.Published as part of Velázquez, Ana Laura Moguel & Kessler, Michael, 2009, Taxonomic notes on the fern species group around Terpsichore lanigera (Polypodiaceae), including the descriptions of three new species and one new variety, pp. 35-45 in Phytotaxa 2 on page 36, DOI: 10.11646/phytotaxa.2.1.6, http://zenodo.org/record/477614
Oral History Program Interview: Robert Lewis Kessler, Jr.
No full textCALIFORNIA STATE COLLEGE, BAKERSFIELD\ud
CALIFORNIA ODYSSEY\ud
The 1930s Migration to the Southern San Joaquin Valley\ud
Oral History Program\ud
Interview Between\ud
INTERVIEWEE:\ud
Robert Lewis Kessler, Jr.\ud
PLACE OF BIRTH: Guthrie, Logan County, Oklahoma\ud
INTERVIEWER: Michael Neel
Sticherus Gonzales & Kessler, 2011, comb. nov.
No full textSticherus ×subremotus (Jermy & T.G.Walker) J.Gonzales, comb. nov. Gleichenia ×subremota Jermy & Walker (1985: 2). Type:— TRINIDAD AND TOBAGO. Trinidad: Blanchisseuse Ward, 450 m, Walker T . 6416 (holotype BM). Distribution and ecology:— Costa Rica, Venezuela, and Trinidad; likely to be more widespread. It grows on open banks at forest edges or along roadsides, forming mixed colonies with S. interjectus and S. remotus at 60– 600 m. Notes:— This hybrid between S. interjectus and S. remotus was cytologically studied and described by Jermy and Walker (1985). It differs from S. interjectus by the more rounded and broader bases of the bud scales, from S. remotus by the approximate segments, abaxial segment surfaces scales, and it is different from both these species by having less regularly shaped and darkened scale cells. Many species in the species complex around S. remotus have unequally developed 2 nd branches, and this pattern is particularly noticeable in S. × subremotus.Published as part of Gonzales, Jasivia & Kessler, Michael, 2011, A synopsis of the Neotropical species of Sticherus (Gleicheniaceae), with descriptions of nine new species, pp. 1-54 in Phytotaxa 31 on page 48, DOI: 10.11646/phytotaxa.31.1.1, http://zenodo.org/record/489464
The impact of population processes on patterns of species richness: lessons from elevational gradients
No full textIn the last few years, considerable headway has been made towards understanding patterns of species richness along latitudinal and elevational gradients, mostly by focussing on the influences of surface area, climatic factors, evolutionary history, and stochastic processes. However, the potential impact of population-level processes in determining or modifying patterns of species richness has largely been neglected, partly due to the difficulty of gathering such data for numerous species along geographical or ecological gradients. Based on two empirical examples, I here show that dispersal and the resulting source-sink effects modify patterns of plant species richness along elevation gradients, and that the inclusion or exclusion of such sink populations alters the perception of the diversity patterns and hence our interpretation of them. I argue that population processes should be taken into account when studying patterns of species richness, especially at scales at which dispersal is common in the taxon under consideration.
Zusammenfassung
In den letzten Jahren hat sich unser Verständnis von Mustern des Artenreichtums entlang von geographischen Gradienten deutlich weiterentwickelt, vor allem durch die Berücksichtigung der Einflüsse von Fläche, Klimafaktoren, der evolutionären Geschichte und stochastischen Prozessen. Der potentielle Einfluss von Prozessen auf der Populationsebene auf Diversitätsmuster ist jedoch weitgehend vernachlässigt worden, teilweise aufgrund der Schwierigkeiten die mit der Erhebung von belastbaren Populationsdaten für zahlreiche Arten entlang von geographischen oder ökologischen Gradienten verbunden sind. Anhand von zwei emprischen Beispielen zeige ich hier, dass Ausbreitung und damit verbundene Quellen-Senken-Effekte Muster der Pflanzendiversität entlang von Höhengradienten modifizieren und dass die Berücksichtigung solcher Senkenpopulationen unsere Wahrnehmung von Diversitätsmustern beeinflussen. Populationsprozesse sollten folglich bei der Betrachtung von Diversitätsmustern berücksichtigt werden, vor allem auf räumlichen Skalen auf denen Ausbreitung der untersuchten Organismengruppe häufig stattfinden
Lindsea linduensis D. Cicuzza & M. Kessler 2012, sp. nov.
No full textLindsea linduensis D.Cicuzza & M.Kessler, sp. nov. (Fig. 1). Type: — INDONESIA. Sulawesi: Central Sulawesi, at the border of the Lore Lindu National Park, Nokilalaki Mountain, Kulawi valley, 1200 m, 01°14'30.483" S, 120°09'19.828" E, 16 March 2008, Cicuzza 891 (holotype Z!, isotypes UC!, BO!, CEB!, GOET!). Differs from Lindsaea repens var. sessilis by having 2-pinnate fronds (versus 1-pinnate), longer petioles (10–17 cm versus 1–5 cm), and more widely spaced ultimate segments (> 5 mm apart versus 5 mm apart versus <4 mm). Following the keys of Kramer (1971), Lindsaea linduensis falls into group G (subg. Odontoloma Kunth). The specimen of L. linduensis keys out to the couplet containing L. rigida and L. regularis. From these, Lindsaea linduensis differs by having less strongly creeping rhizomes, fewer pinna pairs (1 in L. linduensis, 1–7 in L. rigida, 3–9 in L. regularis), and more sori per pinnule (7–8 in L. linduensis, 1–4 in L. rigida, 3–5 in L. regularis).Published as part of Cicuzza, Daniele & Kessler, Michael, 2012, Lindsaea linduensis (Lindsaeaceae, Polypodiales), a new fern species from Sulawesi, Indonesia, pp. 36-40 in Phytotaxa 65 (1) on pages 37-39, DOI: 10.11646/phytotaxa.65.1.4, http://zenodo.org/record/506209
Materials for: Assessing Epistemic Beliefs Regarding the Co-construction of Knowledge: Implications for Team Science.
No full textScientific collaboration is necessary as research grows increasingly more complex. Research focusing on the Science of Team Science (SciTS) seeks to better understand and facilitate collaborative research in science. The current work provides new empirical understandings on epistemic beliefs about group knowledge or how a group collectively comes to know something through the development of the Epistemic Beliefs about the Co-Construction of Knowledge (EB-CCK) inventory. Using exploratory and confirmatory factor analyses, the present study established an 18-item inventory composed of two factors: one capturing a more collaborative mindset and one capturing a more individual mindset about the co-construction of knowledge. These materials are not to be redistributed or repurposed without permission from the corresponding author (Erica Kessler: [email protected])
Lindsaea linduensis (Lindsaeaceae, Polypodiales), a new fern species from Sulawesi, Indoensia
No full textCicuzza, Daniele, Kessler, Michael (2012): Lindsaea linduensis (Lindsaeaceae, Polypodiales), a new fern species from Sulawesi, Indonesia. Phytotaxa 65 (1): 36-40, DOI: 10.11646/phytotaxa.65.1.4, URL: http://biotaxa.org/Phytotaxa/article/view/phytotaxa.65.1.
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