DOCSLIB.ORG

Isoetes Prototypes

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Isoetes Prototypes Évaluation et Rapport de situation du COSEPAC sur l’isoète prototype Isoetes prototypes au Canada COSEPAC COSEWIC COMITÉ SUR LA SITUATION DES COMMITTEE ON THE STATUS OF ESPÈCES EN PÉRIL ENDANGERED WILDLIFE AU CANADA IN CANADA Les rapports de situation du COSEPAC sont des documents de travail servant à déterminer le statut des espèces sauvages que l’on croit en péril. On peut citer le présent rapport de la façon suivante : COSEPAC. 2005. Évaluation et Rapport de situation du COSEPAC sur l’isoète prototype (Isoetes prototypus) au Canada. Comité sur la situation des espèces en péril au Canada. Ottawa. vii + 37 p. (www.registrelep.gc.ca/status/status_f.cfm). Note de production : Le COSEPAC aimerait remercier James P. Goltz et Gart Bishop qui ont rédigé le rapport de situation sur l’isoète prototype (Isoetes prototypus) en vertu d’un contrat avec Environnement Canada. Une partie du financement pour la préparation du présent rapport de situation a été fournie par le Department of Natural Resources de la Nouvelle-Écosse et du ministère des Ressources naturelles du Nouveau-Brunswick. Erich Haber, coprésident (plantes vasculaires) du Sous-comité de spécialistes des plantes et lichens du COSEPAC, a supervisé le présent rapport et en a fait la révision. Pour obtenir des exemplaires supplémentaires, s’adresser au : Secrétariat du COSEPAC a/s Service canadien de la faune Environnement Canada Ottawa (Ontario) K1A 0H3 Tél. : (819) 997-4991 / (819) 953-3215 Téléc. : (819) 994-3684 Courriel : COSEWIC/[email protected] http://www.cosepac.gc.ca Also available in English under the title COSEWIC assessment and status report on the prototype quillwort Isoetes prototypus in Canada. Photo de la couverture : Isoète prototype — dessin de G. Bishop. ÓSa Majesté la Reine du chef du Canada, 2005. PDF : CW69-14/453-2005F-PDF ISBN 0-662-74284-2 HTML : CW69-14/453-2005F-HTML ISBN 0-662-74285-0 Papier recyclé COSEPAC Sommaire de l’évaluation Sommaire de l’évaluation – Mai 2005 Nom commun Isoète prototype Nom scientifique Isoetes prototypus Statut Préoccupante Justification de la désignation Il s’agit d’une espèce endémique régionale dont la quasi-totalité de la population mondiale se trouve au Canada. Cette plante vivace aquatique a des exigences très particulières en matière d’habitat, ce qui limite son occurrence au Canada à quelque douze petits lacs non connectés en Nouvelle-Écosse et au Nouveau- Brunswick. On trouve cette espèce dans des lacs froids pauvres en nutriments alimentés par des sources. On a montré que plusieurs lieux contenaient un grand nombre de plants, mais la moitié des endroits confirmés comptent des petites populations. Une vaste gamme de facteurs limitatifs possibles risquent de nuire à l’espèce, notamment les changements relatifs à la qualité de l’eau, la navigation de plaisance et l’aménagement du littoral. Répartition Nouveau-Brunswick, Nouvelle-Écosse Historique du statut Espèce désignée « préoccupante » en mai 2005. Évaluation fondée sur un nouveau rapport de situation. iii COSEPAC Résumé Isoète prototype Isoetes prototypus Information sur l’espèce L’isoète prototype (Isoetes prototypus) est une plante aquatique vivace apparentée aux fougères. La plante se compose d’une touffe de feuilles tubuleuses droites et fragiles naissant d’un corme bilobé ou rarement trilobé. Les spores reproductrices (mégaspores et microspores) se forment dans la base renflée des feuilles. Il arrive souvent que des plantes se détachent du substrat où elles sont enracinées; ces plantes remontent à la surface et finissent souvent par former des amas sur les berges du lac. On identifie généralement l’espèce par la taille et l’ornementation de ses spores et par le nombre de ses chromosomes. Répartition La répartition mondiale de l’Isoetes prototypus se limite à treize lacs : neuf en Nouvelle-Écosse, trois au Nouveau-Brunswick et un au Maine. Habitat L’Isoetes prototypus forme souvent des tapis denses au fond de lacs oligotrophes (pauvres en éléments nutritifs) alimentés par des sources. La plante se trouve généralement à une profondeur de 1,5 à 2,5 m, enracinée dans des sédiments mous, floculeux et vaseux recouvrant du sable ou du gravier. L’eau de ces lacs est généralement claire, mais il arrive que des tannins lui confèrent une coloration de thé. L’espèce pousse généralement avec d’autres plantes aquatiques à rosette, en particulier l’Eriocaulon aquaticum et l’Isoetes lacustris. Biologie On estime que l’Isoetes prototypus doit avoir un cycle vital typique du genre Isoetes. Le sporophyte, à feuilles tubuleuses vert foncé, constitue le stade adulte du cycle vital, comporte deux séries de chromosomes et produit des mégaspores et des microspores, qui, en germant, se transforment respectivement en gamétophytes femelles et en gamétophytes mâles. Les gamétophytes sont des plantes minuscules comportant une seule série de chromosomes et produisant des gamètes. Lorsqu’une des oosphères que renferme un gamétophyte femelle a été fécondée par iv un spermatozoïde provenant d’un gamétophyte mâle, un nouveau sporophyte se développe directement à partir de l’oosphère. L’écologie de l’espèce est méconnue. On trouve parfois des tapis d’individus déracinés flottant le long des berges des lacs où l’I. prototypus est présent. On ne sait pas exactement de quelle manière ces plantes en viennent à être déracinées. Taille et tendances des populations L’Isoetes prototypus n’a été reconnu comme nouvelle espèce qu’en 1988, à la suite de sa découverte dans un seul lac du Nouveau-Brunswick (site 10). De 1988 à 1993, en examinant des spécimens d’herbier, D.M. Britton a pu ajouter à la répartition connue de l’espèce cinq sites (sites 1, 4 et 6 en Nouvelle-Écosse et site 13 au Maine). De 1989 à 1998, les travaux de terrain de Britton lui ont permis de découvrir deux autres sites en Nouvelle-Écosse (sites 3 et 7); dans un de ces sites (site 7), l’espèce a aussi été découverte par D.F. Brunton, de manière indépendante et vers la même période. Les travaux de terrain effectués en 2003 pour la préparation du présent rapport ont mené à la découverte de quatre autres sites (2, 5, 8 et 9) en Nouvelle-Écosse. Deux sites additionnels ont été découverts au Nouveau-Brunswick en 2004 (sites 11 et 12). Aucun des sites d’I. prototypus n’a fait l’objet d’un suivi visant spécifiquement à connaître les variations de l’effectif des populations. Selon les travaux de terrain menés aux fins du présent rapport, environ 250 000 individus de l’espèce seraient présents au Canada, mais il s’agit d’une estimation très prudente, car l’espèce peut former des tapis très denses (jusqu’à 392 individus par mètre carré). Il n’en demeure pas moins que la superficie totale des lacs accueillant l’I. prototypus est assez faible (< 961 ha). Facteurs limitatifs et menaces Bien qu’aucune menace particulière n’ait été notée in situ dans les lacs où l’I. prototypus est présent, des routes et/ou des ponts-jetées longent la rive de trois des lacs ou empiètent sur celle-ci, et la construction de chalets, accompagnée du déboisement des berges, est intensive par endroits dans quatre des lacs. Les impacts de ces aménagements sont inconnus, mais de telles transformations de l’habitat pourraient nuire à l’I. prototypus. On a observé que des plantes avaient été déracinées à proximité de sentiers d’orignaux au fond de l’eau; un tel déracinement a aussi été causé par l’utilisation de palmes de natation. D’autres facteurs pouvant nuire à espèce ont été répertoriés ou étudiés par d’autres chercheurs : endommagement ou déracinement direct de plantes par les bateaux, la pêche, l’utilisation d’ancres, le raclage des aires de baignade, l’installation de tuyaux de prise d’eau et les activités des espèces sauvages; altérations de l’habitat dues à la modification du niveau des eaux par les barrages ou le drainage, à la pollution de l’eau, à l’eutrophisation, à l’envasement, à une modification du pH ou à la compétition exercée par des plantes envahissantes ou exotiques. v Importance de l’espèce L’espèce est endémique de l’est de l’Amérique du Nord et ne se rencontre que dans treize petits lacs situés principalement en Nouvelle-Écosse et au Nouveau- Brunswick. Il s’agit d’une des deux espèces diploïdes indigènes du nord-est de l’Amérique du Nord, et elle est probablement un des ancêtres de plusieurs autres espèces du continent. D.F. Brunton, spécialiste des isoètes, estime qu’il s’agit d’un « fossile vivant » d’importance mondiale. Protection actuelle ou autres désignations de statut L’Isoetes prototypus n’est pas protégé par la Loi sur les espèces en péril du Canada ni par la Endangered Species Act of 1973 des États-Unis. Au Nouveau-Brunswick, l’I. prototypus et son habitat sont protégés par la Loi sur les espèces menacées d’extinction de la province. L’I. prototypus n’est pas inscrit en tant qu’espèce en péril aux termes de la loi de la Nouvelle-Écosse, ni de celle du Maine. Aucun des lacs du Canada où l’I. prototypus est présent ne se trouve dans une zone protégée. Un des sites du Nouveau-Brunswick se trouve sur un terrain du ministère de la Défense nationale. Deux lacs (site 13 au Maine et site 1 en Nouvelle- Écosse) sont des sources publiques d’eau potable. Le site du Maine se trouve dans le Acadia National Park et donc dans une zone protégée. On a attribué à l’Isoetes prototypus la cote S1 au Nouveau-Brunswick et au Maine ainsi que la cote S2 en Nouvelle-Écosse. On lui a attribué les cotes N1? au Canada et N1 aux États-Unis.
Load more

Recommended publications
  • RI Equisetopsida and Lycopodiopsida.Indd
    IIntroductionntroduction byby FFrancisrancis UnderwoodUnderwood Rhode Island Equisetopsida, Lycopodiopsida and Isoetopsida Special Th anks to the following for giving permission for the use their images. Robbin Moran New York Botanical Garden George Yatskievych and Ann Larson Missouri Botanical Garden Jan De Laet, plantsystematics.org Th is pdf is a companion publication to Rhode Island Equisetopsida, Lycopodiopsida & Isoetopsida at among-ri-wildfl owers.org Th e Elfi n Press 2016 Introduction Formerly known as fern allies, Horsetails, Club-mosses, Fir-mosses, Spike-mosses and Quillworts are plants that have an alternate generation life-cycle similar to ferns, having both sporophyte and gametophyte stages. Equisetopsida Horsetails date from the Devonian period (416 to 359 million years ago) in earth’s history where they were trees up to 110 feet in height and helped to form the coal deposits of the Carboniferous period. Only one genus has survived to modern times (Equisetum). Horsetails Horsetails (Equisetum) have jointed stems with whorls of thin narrow leaves. In the sporophyte stage, they have a sterile and fertile form. Th ey produce only one type of spore. While the gametophytes produced from the spores appear to be plentiful, the successful reproduction of the sporophyte form is low with most Horsetails reproducing vegetatively. Lycopodiopsida Lycopodiopsida includes the clubmosses (Dendrolycopodium, Diphasiastrum, Lycopodiella, Lycopodium , Spinulum) and Fir-mosses (Huperzia) Clubmosses Clubmosses are evergreen plants that produce only microspores that develop into a gametophyte capable of producing both sperm and egg cells. Club-mosses can produce the spores either in leaf axils or at the top of their stems. Th e spore capsules form in a cone-like structures (strobili) at the top of the plants.
    [Show full text]
  • Lake Quillwort Isoetes Lacustris
    Natural Heritage Lake Quillwort & Endangered Species Isoetes lacustris L. Program www.mass.gov/nhesp State Status: Endangered Federal Status: None Massachusetts Division of Fisheries & Wildlife DESCRIPTION: Lake Quillwort is a perennial, aquatic, nonflowering member of the Quillwort family (Isoetaceae). This inconspicuous species lives submerged in ponds as a rosette of linear leaves (somewhat resembling chives), and reproduces via spores. AIDS TO IDENTIFICATION: The rosette of Lake Quillwort is composed of sharply pointed leaves, 0.7 to 2 mm wide and mostly 5 to 10 cm (2–4 in.) long, occasionally reaching 20 cm. The leaves are dark green, firm, fleshy, and brittle, emerging from a very short, thick stem that is anchored in the substrate by a subterranean corm. The leaf bases of quillworts are swollen, flattened, and concave; the rosette is arranged tightly like the bracts of an artichoke. Within the swollen Lake Quillwort is an aquatic species with a rosette of leaves that leaf bases are sporangia, sacs that house the male have swollen bases; within the leaf bases are sporangia with gametophyte-bearing microspores and the female microspores and megaspores. Photo by Robbin Moran. megaspores. A sheath, or velum, covers the sporangia; in Lake Quillwort, the velum covers up to half of the sporangia. The megaspore of Lake Quillwort, which SIMILAR SPECIES: Quillwort species are very requires a microscope to view, is mostly covered with similar in appearance and identification requires sharp, wavy crests, with a band (the girdle) encircling examination of the ornamentation of mature megaspores the spore that lacks ridges and is covered with tiny under a microscope.
    [Show full text]
  • Aquatic Vascular Plant Species Distribution Maps
    Appendix 11.5.1: Aquatic Vascular Plant Species Distribution Maps These distribution maps are for 116 aquatic vascular macrophyte species (Table 1). Aquatic designation follows habitat descriptions in Haines and Vining (1998), and includes submergent, floating and some emergent species. See Appendix 11.4 for list of species. Also included in Appendix 11.4 is the number of HUC-10 watersheds from which each taxon has been recorded, and the county-level distributions. Data are from nine sources, as compiled in the MABP database (plus a few additional records derived from ancilliary information contained in reports from two fisheries surveys in the Upper St. John basin organized by The Nature Conservancy). With the exception of the University of Maine herbarium records, most locations represent point samples (coordinates were provided in data sources or derived by MABP from site descriptions in data sources). The herbarium data are identified only to township. In the species distribution maps, town-level records are indicated by center-points (centroids). Figure 1 on this page shows as polygons the towns where taxon records are identified only at the town level. Data Sources: MABP ID MABP DataSet Name Provider 7 Rare taxa from MNAP lake plant surveys D. Cameron, MNAP 8 Lake plant surveys D. Cameron, MNAP 35 Acadia National Park plant survey C. Greene et al. 63 Lake plant surveys A. Dieffenbacher-Krall 71 Natural Heritage Database (rare plants) MNAP 91 University of Maine herbarium database C. Campbell 183 Natural Heritage Database (delisted species) MNAP 194 Rapid bioassessment surveys D. Cameron, MNAP 207 Invasive aquatic plant records MDEP Maps are in alphabetical order by species name.
    [Show full text]
  • Bibliography of Isoetes
    BIBLIOGRAPHY OF ISOETES ALLEN, B.M. 1975. A note on the distribution of Isoetes in the Cadiz Province, Spain. Fern Gaz. (U.K.) 11 (2-3): 163-164 (1975). ALONSO, PAZ, E. 1989. Notas sobre plantas nuevas o interesantes para la flora Uruguaya: 1. (Notes on new or interesting plants for the Uruguayan flora: 1.) Comun. Bot. Mus. Hist. Nat. Montevideo 5 (91): 1-4 (1989) - Isoetes pp.2-3 ALSTON, A.H.G. 1982. Isoetaceae: 1. In Steenis, C.G.G.J. van, Holttum, R. E., eds. Flora Malesiana, series 2. Pteridophytes, volume 1. The Hague, Martinus Nijhoff, Dr. W. Junk Publ. 62-64 (1982)- illus., chrom. nos., key. ANDREIS, C., RODONDI, G. 1987. Alcune stazioni di Isoetes echinospora Dur. nel Bresciano e osservazioni al SEM delle spore delle Isoetes della flora Italica. Natura Bresciana no.23: 119-130 (1986 publ. 1987) - illus., maps. 4, ANTHONY, N.C., & E.A. SCHELPE, 1985. Two new taxa and a new combination in southern African Pteridophyta. Bothalia, 15 (3 & 4): 554-555 (1985) ARREGUIN-SANCHEZ, M., 1986. Nuevos registros y taxa interesantes de pteridofitas del Valle de Mexico. (Isoetaceae, Psilotaceae y Selaginellaceae) Phytologia 59 (7): 451-453 (1986) ASH, S., & K.B. PIGG. 1991. A new Jurassic Isoetites (Isoetales) from the Wallowa Terrane in Hells Canyon Oregon and Idaho. Amer. J. Bot. 78: 1636-1642. BAJPAI, U., & H.K. MAHESHWARI,1985. EM studies on the megaspores of Isoetes coromandelina. Phytomorphology, 34 (1-4): 226-231 (1984 publ. 1985) - illus. BALDWIN, W.K.W. 1933. The organization of the young sporophyte of Isoetes engelmanni, A.
    [Show full text]
  • A Targeted Survey of Najas Flexilis
    A targeted survey of Najas flexilis ned in Department Green Unpublished Report, National Parks & Wildlife Service A targeted survey of Najas flexilis Cilian Roden and Paul Murphy Roden Ecology and Eireco Citation: Roden, C. & Murphy, P. (2014) Targeted survey of Najas flexilis. Unpublished Report, National Parks and Wildlife Service, Department of the Arts, Heritage and the Gaeltacht, Ireland. Keywords: Najas flexilis, Habitats Directive Site list: 2034, 1342,,297,1932,1919,2031,365,2130. Cover photos: © NPWS NPWS Project Officer for this report was: Deirdre Lynn; [email protected] © National Parks and Wildlife Service 2013 Targeted Najas survey ____________________________ Contents Contents .......................................................................................................................... 1 Executive Summary ....................................................................................................... 1 Acknowledgements ........................................................................................................ 1 Introduction .................................................................................................................... 2 Background .................................................................................................................. 2 Survey methods .............................................................................................................. 4 Results ............................................................................................................................
    [Show full text]
  • LACON: Lake Assessment for Conservation Version 1 Manual
    Scottish Natural Heritage Archive Report No. 175 LACON: Lake Assessment for Conservation Version 1 Manual ARCHIVE REPORT Archive Report No. 175 LACON: Lake Assessment for Conservation Version 1 Manual For further information on this report please contact: Alison Lee Scottish Natural Heritage Silvan House 231 Corstorphine Road EDINBURGH EH12 7AT Telephone: 0131 316 2620 E-mail: [email protected] This report should be quoted as: Palmer, M.A. 2008. LACON: Lake Assessment for Conservation – Version 1 Manual. Scottish Natural Heritage Archive Report No. 175. This report, or any part of it, should not be reproduced without the permission of Scottish Natural Heritage. This permission will not be withheld unreasonably. The views expressed by the author(s) of this report should not be taken as the views and policies of Scottish Natural Heritage. © Scottish Natural Heritage 2019. Archive Reports Scottish Natural Heritage is committed to making the findings of all of its research publicly available whenever possible. In the past, a number of reports from staff and contractors were produced as paper documents and lodged in the SNH library or file systems. Some related to Site Condition Monitoring, others covered a range of subjects. These were not published as Research Reports for a number of reasons. In order to make these reports more available, we have decided to publish them online under the series title of Archive Reports. These will be numbered consecutively in the order that they are prepared for web publication. Their publication date, authors and title will be recorded as presented in the original report. The Archive Reports will be published as scanned PDF files of the original reports.
    [Show full text]
  • Enrichment on Isoetes Lacustris
    1 Deleterious interaction of light impairment and organic matter 2 enrichment on Isoetes lacustris 3 Eglantine Chappuisa*, Ana Lumbreras a,b, Enric Ballesteros a, Esperança Gacia a 4 a Biogeodynamics and Biodiversity Group, Center for Advanced Studies of Blanes, CEAB-CSIC, 5 Ctra. Accés Cala St. Francesc 14, 17300 Blanes, Spain. 6 b Instituto de Ciências Agrárias e Ambientais Mediterrânicas (ICAAM), Universidade de Évora 7 Apartado 94, 7006-554 Évora, Portugal (Present address). 8 * Corresponding author. E-mail: [email protected], Tel.: (+34) 972 336101; Fax: (+34) 9 972 337806 10 Abstract 11 Light reduction and increased organic matter load often occur together in lakes undergoing 12 eutrophication. We aimed at experimentally testing the relative importance of light availability, 13 organic matter enrichment and its interaction in the collapse of healthy populations of Isoetes 14 lacustris. We conducted an in situ shading (65% and 35% of incident light) and organic matter 15 enrichment (10% organic matter enrichment) experiment in a Pyrenean pond (NE Spain). We 16 followed plant performance by using growth indicators, carbon balance indicators and individual 17 survival. Severe light reduction (35%) resulted in a lengthening of the new leaves and no effects 18 on mortality. Organic matter enrichment resulted in lower production and increased individual 19 mortality. The combination of both stresses resulted in stronger negative effects and the highest 20 mortality rate, which helps explaining I. lacustris die-offs observed after damming. Under severe 21 light reduction (35%), plants used corm starch to keep growing. Consequently, starch 22 percentage decreased and sucrose percentage increased as it was transported to the growing 23 leaves.
    [Show full text]
  • Inferring the Evolutionary Reduction of Corm Lobation in Isoëtes Using Bayesian Model- Averaged Ancestral State Reconstruction
    UC Berkeley UC Berkeley Previously Published Works Title Inferring the evolutionary reduction of corm lobation in Isoëtes using Bayesian model- averaged ancestral state reconstruction. Permalink https://escholarship.org/uc/item/39h708p5 Journal American journal of botany, 105(2) ISSN 0002-9122 Authors Freund, Forrest D Freyman, William A Rothfels, Carl J Publication Date 2018-02-01 DOI 10.1002/ajb2.1024 Peer reviewed eScholarship.org Powered by the California Digital Library University of California RESEARCH ARTICLE BRIEF COMMUNICATION Inferring the evolutionary reduction of corm lobation in Isoëtes using Bayesian model- averaged ancestral state reconstruction Forrest D. Freund1,2, William A. Freyman1,2, and Carl J. Rothfels1 Manuscript received 26 October 2017; revision accepted 2 January PREMISE OF THE STUDY: Inferring the evolution of characters in Isoëtes has been problematic, 2018. as these plants are morphologically conservative and yet highly variable and homoplasious 1 Department of Integrative Biology, University of California, within that conserved base morphology. However, molecular phylogenies have given us a Berkeley, Berkeley, CA 94720-3140, USA valuable tool for testing hypotheses of character evolution within the genus, such as the 2 Authors for correspondence (e-mail: [email protected], hypothesis of ongoing morphological reductions. [email protected]) Citation: Freund, F. D., W. A. Freyman, and C. J. Rothfels. 2018. METHODS: We examined the reduction in lobe number on the underground trunk, or corm, by Inferring the evolutionary reduction of corm lobation in Isoëtes using combining the most recent molecular phylogeny with morphological descriptions gathered Bayesian model- averaged ancestral state reconstruction. American from the literature and observations of living specimens.
    [Show full text]
  • European Lycopods and Ferns
    European Red List of Lycopods and Ferns Mariana García Criado, Henry Väre, Ana Nieto, Rui Bento Elias, Robert Dyer, Yury Ivanenko, Daniella Ivanova, Richard Lansdown, José Antonio Molina, Germinal Rouhan, Fred Rumsey, Angelo Troia, Jan Vrba and Maarten J. M. Christenhusz European Red List of Lycopods and Ferns Mariana García Criado, Henry Väre, Ana Nieto, Rui Bento Elias, Robert Dyer, Yury Ivanenko, Daniella Ivanova, Richard Lansdown, José Antonio Molina, Germinal Rouhan, Fred Rumsey, Angelo Troia, Jan Vrba and Maarten J. M. Christenhusz The designation of geographical entities in this book, and the presentation of the material, do not imply the expression of any opinion whatsoever on the part of IUCN concerning the legal status of any country, territory, or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. The views expressed in this publication do not necessarily reflect those of IUCN. This publication has been prepared by IUCN (International Union for Conservation of Nature) as a deliverable of the LIFE European Red Lists project (LIFE14 PRE/BE/000001). Project Title: Establishing a European Red List of Bryophytes, Pteridophytes, Saproxylic Beetles, Terrestrial Molluscs and Vascular Plants (LIFE European Red Lists; LIFE14 PRE/BE/000001). Project duration: May 2015 to December 2018. Project’s total costs: 1,166,667 EUR. Contribution of the LIFE Programme: 700,000 EUR. The LIFE Programme (http://ec.europa.eu/environment/life/index.htm) is the EU’s financial instrument supporting environmental, nature conservation and climate action projects throughout the EU. The general objective of LIFE is to contribute to the implementation, updating and development of EU environmental, nature conservation and climate policy and legislation by co- financing projects with European added value.
    [Show full text]
  • Quillwort (Isoëtes), a Mysterious Plant from the Czech Republic
    SBORNÍK NÁRODNÍHO MUZEA V PRAZE ACTA MUSEI NATIONALIS PRAGAE Řada B – Přírodní vědy • sv. 67 • 2011 • čís. 1–2 • s. 25–34 Series B – Historia Naturalis • vol. 67 • 2011 • no. 1–2 • pp. 25–34 QUILLWORT (ISOËTES), A MYSTERIOUS PLANT FROM THE CZECH REPUBLIC EVA BŘÍZOVÁ Czech Geological Survey, Klárov 3/131, 118 21 Praha 1, Czech Republic; [email protected] Břízová, E. (2011): Quillwort (Isoëtes), a mysterious plant from the Czech Republic. – Acta Mus. Nat. Pragae, Ser. B, Hist. Nat. 67(1-2): 25-34, Praha. ISSN 0036-5343. Abstract. Quillwort (Isoëtes) is a water fern which is a very scarce and critically endangered species in our territory mainly due to the fact that the localities are situated on the southern edge of its distribution. Proof of its occurrence in the past can be gained through palaeobota- nical research of sediments which contain their micro- or megaspores. In our territory it has been found only in the Bohemian Forest (Šumava Mts). In addition to the recent plants living in Černé and Plešné Lakes, fossil findings of spores in the former lake of Stará Jímka and in sediments of Prášilské and Čertovo Lakes were recently found. n Isoëtes, lake sediments, fossil plant, Pleistocene relict, Late Glacial, Holocene, recent Received October 4, 2010 Issued August 2011 Introduction Vöge 1989, 1997a, 1997b, 1999, Szmeja 1994a, 1994b, Ga- cia and Ballesteros 1994). In comparison with the literature, Quillwort (Isoëtes) is a water plant which cannot be eas- particularly from the northern lakes, it is obvious that the ily seen in its natural biotope.
    [Show full text]
  • Recovery Strategy and Action Plan for Bolander's Quillwort (Isoetes
    Species at Risk Act Recovery Strategy Series Recovery Strategy and Action Plan for Bolander’s Quillwort (Isoetes bolanderi) in Canada Bolander’s Quillwort February 2011 About the Species at Risk Act Recovery Strategy Series What is the Species at Risk Act (SARA)? SARA is the Act developed by the federal government as a key contribution to the common national effort to protect and conserve species at risk in Canada. SARA came into force in 2003, and one of its purposes is “to provide for the recovery of wildlife species that are extirpated, endangered or threatened as a result of human activity.” What is recovery? In the context of species at risk conservation, recovery is the process by which the decline of an endangered, threatened, or extirpated species is arrested or reversed and threats are removed or reduced to improve the likelihood of the species’ persistence in the wild. A species will be considered recovered when its long-term persistence in the wild has been secured. What is a recovery strategy? A recovery strategy is a planning document that identifies what needs to be done to arrest or reverse the decline of a species. It sets goals and objectives and identifies the main areas of activities to be undertaken. Detailed planning is done at the action plan stage. Recovery strategy development is a commitment of all provinces and territories and of three federal agencies — Environment Canada, Parks Canada Agency, and Fisheries and Oceans Canada — under the Accord for the Protection of Species at Risk. Sections 37–46 of SARA (http://www.sararegistry.gc.ca/approach/act/default_e.cfm) outline both the required content and the process for developing recovery strategies published in this series.
    [Show full text]
  • D: Rare Plants Species and Wildlife Habitats
    Appendix D – Rare Plant Species and Wildlife Habitats Rare Plant Species and Wildlife Habitats The habitat profiles created for the Wildlife Action Plan have been developed for the purpose of describing the full range of habitats that support New Hampshire’s wildlife species. However, these habitats can also serve as useful units for identifying rare plant habitats. This appendix provides lists of rare plant species known to be associated with each WAP habitat type. In accordance with the Native Plant Protection Act (NH RSA 217-A), the New Hampshire Natural Heritage Bureau (NHB) maintains a list of the state’s rarest and most imperiled plant species. This list has been developed in cooperation with researchers, conservation organizations, and knowledgeable amateur botanists. Plant locations have been obtained from sources including herbarium specimens, personal contacts, the scientific literature, and through extensive field research. The list is updated regularly to reflect changes in information. For each habitat, a list of associated rare plant species is presented. These rare plant – habitat associations are based on known occurrences of each species in New Hampshire. It is possible that an individual species will have different habitat associations elsewhere in its range. For more information on dominant and characteristic plant species for each habitat, refer to the individual habitat profiles. For each species, the following information is provided: Scientific name: The primary reference used is: Haines, Arthur. 2011. Flora Novae Angliae: A Manual for the Identification of Native and Naturalized Higher Vascular Plants of New England. Yale University Press. New Haven and London. Common name: Many plant species have more than one common name, and some common names are applied to multiple species.
    [Show full text]