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  • 1
    Online-Ressource
    Online-Ressource
    Denton :University of North Texas Press,
    Schlagwort(e): Bryophytes -- Chile -- Horn, Cape. ; Lichens -- Chile -- Horn, Cape. ; Botanical gardens -- Chile -- Horn, Cape. ; Biosphere reserves -- Chile -- Horn, Cape. ; Biodiversity conservation -- Chile -- Horn, Cape. ; Ecotourism -- Chile -- Horn, Cape. ; Trails -- Chile -- Horn, Cape -- Guidebooks. ; Electronic books.
    Beschreibung / Inhaltsverzeichnis: In the humid forests of Cape Horn, a single tree can host more than 100 species of little epiphyte plants. The floor of the forest and the rocks are also covered by numerous species of liverworts, mosses, and lichens. The decision to stop at a tree or rock and explore these "miniature forests" generates an authentic ecotourism experience. In a small area we can spend several minutes or hours with a magnifying glass or camera discovering the colors, shapes, and textures of the most diverse organisms of Cape Horn. This guidebook enhances exploration by providing information to understand the architecture, life cycles, and identification of taxonomic groups of the organisms that form them. For example, when viewing a yellow orange organism, the full color pictures and text in the guidebook illustrate that what you are viewing on the inter-tidal rocks is a crustose lichen, with a well-defined circular structure belonging to the genus Caloplaca that enjoys a broad distribution in inter-tidal zones of Arctic and Antarctic areas. The authors of this guidebook also provide a novel twist on other, more traditional field guides to bryophytes and lichens by introducing the innovative, sustainable tourism activity of "ecotourism with a hand lens." They present a strong natural history narrative and an ecological and ethical orientation for the appreciation of wonders of the miniature forests of Cape Horn.
    Materialart: Online-Ressource
    Seiten: 1 online resource (445 pages)
    Ausgabe: 2nd ed.
    ISBN: 9781574414561
    DDC: 588.09165/26
    Sprache: Englisch
    Anmerkung: Intro -- Contents / Contenido -- Serendipity in the Origin of Ecotourism with a Hand Lens /Serendipia en el Origen del Ecoturismo con Lupa - Ricardo Rozzi -- I. Ecotourism with a Hand Lens / Ecoturismo con Lupa -- 1. Introduction to Ecotourism with a Hand Lens /Introducción al Ecoturismo con Lupa - Ricardo Rozzi -- II. Introduction to the Bryophytes and Lichens of the Cape Horn Biosphere Reserve / Introduccion a las Briofitas y Liquenes de la Reserva de Biosfera Cabo de Hornos -- 2. Introduction to Bryophytes / Introducción a las Briofitas - Bernard Goffinet, William Buck & -- Ricardo Rozzi -- 3. Introduction to Lichens / Introducción a los Líquenes - Bernard Goffinet -- 4. Lichens and their Habitats at the Omora Ethnobotanical Park andNavarino Island / Los Líquenes y sus Hábitats en el Parque Etnobotánico Omora y la Isla Navarino - Leopoldo Sancho -- III. Representative Bryophyte and Lichen Species of the Miniature Forests of Cape Horn / Especies Representativas de Briofitas y Liquenes de Los Bosques en Miniaturia del cabo de Hornos -- 5. Moss Species / Especies de Musgos - Bernard Goffinet, Lily Lewis, William Buck, Francisca Massardo & -- Ricardo Rozzi -- 6. Liverwort Species / Especies de Hepáticas - Bernard Goffinet, Lily Lewis, William Buck, Francisca Massardo & -- Ricardo Rozzi -- 7. Hornwort Species / Especies de Antocerotes - Bernard Goffinet, Lily Lewis & -- Juan Carlos Villarreal -- 8. Lichen Species / Especies de Líquenes - Bernard Goffinet, Lily Lewis, William Buck, Leopoldo Sancho, Francisca Massardo & -- Ricardo Rozzi -- IV. Ecotourism with a Hand Lens in the Trail of the Miniature Forests of Cape Horn at Omora Park / Ecotourismo Con Lupa en El Sendero De Los Bosques en Miniatura Del Cabo de Hornos en El Parque Omora. , 9. Recognizing Species and Practicing Ecotourism with a Hand Lens /Reconociendo Especies y Practicando Ecoturismo con Lupa - Lily Lewis, Francisca Massardo, Yanet Medina, Kelli Moses, Manuela Méndez, Bernard Goffinet & -- Ricardo Rozzi -- Afterword "On Seeing-As" / Epilogo "Ver Como" - J. Britt Holbrook -- Acknowledgments -- Agradecimientos -- Bibliography / Bibliografia -- Glossary -- Glosario -- Participants / Participantes -- Image Credits / Creditos De Las Imagenes -- Index of Names / Índice De Nombres.
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  • 2
    ISSN: 1573-5052
    Schlagwort(e): Anarthrophyllum cumingii ; Andean flora ; equatorial-facing slopes ; flowering periods ; gene flow ; polar-facing slopes ; pollen flow ; pollination ; seed dispersal
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract In the Andes of Central Chile, flowering commences 1–2 months earlier on equatorial-(north-) facing than on polar- (south-) facing slopes, and pollinator assemblages also differ between these habitats. In order to understand the potential influence of these differences on gene flow, we monitored flowering periods and insect visitation rates to flowers of 60 individuals of Anarthrophyllum cumingii (Papilionaceae) on two equatorial- and two polar-facing slopes in the Andes of central Chile (33°35′ S;70°32′ W). Flowering began about 30 days earlier on equatorial-facing slopes. Flowering periods of individuals on slopes with the same aspect had a mean overlap of 0.52, while those on opposite slopes had a mean overlap of 0.15. On equatorial-facing slopes Yramea lathionoides (Lepidoptera) accounted for 60% of the visits to flowers of A. cumingii, while on polar-facing slopes Centris cineraria (Hymenoptera) was responsible for more than 80% of flower visits. Average similarities of visitor assemblages among individual plants on slopes with the same aspect was 0.83, while the mean similarity between individuals on opposite slopes was only 0.23. Within slopes fluorescent dyes were dispersed up to 40 m from the donor plants, but there was no movements of dyes between individuals growing on opposite slopes, even when they were separated by less than 10 m. Synchronous blooming and a common pollen vector are necessary conditions for pollen exchange between individuals. The overall probability of pollen exchange estimated by multiplying the inter-individual overlap for both factors, was nearly 0.5 for individuals growing on slopes with the same aspect, and less than 0.04 for individuals growing on opposite slopes. Consequently, at equivalent distances, the probability of pollen exchange between individuals growing on slopes of opposite aspect is more than 10-times lower than between those growing on the same slopes. Seed dispersal cannot compensate for restricted gene flow through pollination, because seeds of A. cumingii were dispersed less than 2 m away from a parent plant. Presumably, restricted gene flow could enhance genetic divergence between populations on slopes of contrasting aspects. This factor could be important in contributing to the high diversity and endemism in the Chilean Andes.
    Materialart: Digitale Medien
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