DOCSLIB.ORG

Hill's Pondweed (Potamogeton Hillii)

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Hill's Pondweed (Potamogeton Hillii) COSEWIC Assessment and Update Status Report on the Hill's Pondweed Potamogeton hillii in Canada SPECIAL CONCERN 2005 COSEWIC COSEPAC COMMITTEE ON THE STATUS OF COMITÉ SUR LA SITUATION ENDANGERED WILDLIFE DES ESPÈCES EN PÉRIL IN CANADA AU CANADA COSEWIC status reports are working documents used in assigning the status of wildlife species suspected of being at risk. This report may be cited as follows: COSEWIC 2005. COSEWIC assessment and update status report on the Hill's pondweed Potamogeton hillii in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. vi + 19 pp. (www.sararegistry.gc.ca/status/status_e.cfm). Previous report: Brownell, V.R. 1986. COSEWIC status report on the Hill's Pondweed Potamogeton hillii in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. 34 pp. Production note: COSEWIC would like to acknowledge Kristina Makkay for writing the update status report on the Hill's pondweed Potamogeton hillii. The report has been overseen and edited by Erich Haber, Co-chair (vascular plants) of the COSEWIC Plants and Lichens Species Specialist Subcommittee. For additional copies contact: COSEWIC Secretariat c/o Canadian Wildlife Service Environment Canada Ottawa, ON K1A 0H3 Tel.: (819) 997-4991 / (819) 953-3215 Fax: (819) 994-3684 E-mail: COSEWIC/[email protected] http://www.cosewic.gc.ca Ếgalement disponible en français sous le titre Ếvaluation et Rapport de situation du COSEPAC sur le potamot de Hill (Potamogeton hillii) au Canada – Mise à jour. Cover illustration: Hill's pondweed — Illustration courtesy of Agriculture and Agri-food Canada. Her Majesty the Queen in Right of Canada 2005 Catalogue No. CW69-14/446-2005E-PDF ISBN 0-662-40656-7 HTML: CW69-14/446-2005E-HTML 0-662-40657-5 Recycled paper COSEWIC Assessment Summary Assessment Summary – May 2005 Common name Hill's pondweed Scientific name Potamogeton hillii Status Special Concern Reason for designation An inconspicuous, rooted, aquatic plant currently known from fewer than 20 Canadian populations and occupying a very small total area of habitat. No imminent limiting factors have been identified that would have significant impacts on this globally rare species, but invasive exotic plants may be impacting some populations. Occurrence Ontario Status history Designated Special Concern in April 1986. Status re-examined and confirmed in May 2005. Last assessment based on an update status report. COSEWIC Executive Summary Hill's Pondweed Potamogeton hillii Species information Hill’s pondweed (Potamogeton hillii) is an entirely submerged pondweed, 30-60 cm long with narrow, linear, bristle-tipped leaves 2-6 cm long and 1-2.5 mm wide. Fruit is brown, up to 4 mm long, and borne on a recurved stalk. Its overall appearance is similar to other linear-leaved pondweeds. Distribution In Canada, Hill’s pondweed is found mostly on Manitoulin Island and the Bruce Peninsula, Ontario. Additional reports come from Elgin County, Wellington County, and Peel Regional Municipality. In the United States, it has been found in Michigan, Wisconsin, Ohio, New York, Pennsylvania, Connecticut, Massachusetts, and Vermont. Its extent of occurrence in Canada is about 1300 km2. Habitat Hill’s pondweed is found in cold, clear, calcareous streams, ponds and ditches with an alkalinity of 53.0 to 316.7 mg/l HCO3, usually where there is dolomitic limestone. Habitat trends are unknown. Five of the 20 extant populations are in protected areas. Biology Reproduction occurs both by seed and vegetatively by winter buds. Flowering occurs in July, and seed set occurs August to September. Seeds are water or waterfowl dispersed. Little research has been done on the ecological role of Hill’s pondweed, but it is likely to fill a role similar to that of other pondweeds. Population sizes and trends Hill’s pondweed has been reported at 24 sites in Canada; at two of these the species is extirpated. Field visits were made to 20 sites. A species that resembled Hill’s pondweed was found at 12 sites. At seven sites no fruit was found in 2003, which reduced the certainty of identification. A minimum area of occupancy, based only on the iv sites where fruit was available for positive identification of the species, would total about 25 ha and consist of an estimated 55,000+ plants. If identification was correct in all cases, the area of occupancy would be about 27 ha, including supplementary data provided by the Ministry of Natural Resources, Ontario, and the population estimated to comprise approximately 119,600 individuals. Limiting factors and threats The main threats to Hill’s pondweed are habitat destruction and degradation. Special significance of the species As in the case of other pondweeds, the species likely serves as food for waterfowl and possibly for some mammals. No Aboriginal uses have been recorded in the literature. Existing protection or other status designations Hill’s pondweed was designated in 1986 as Special Concern by COSEWIC In Ontario, the species is listed as Threatened under the recently approved Species at Risk list (see http:www.ontarioparks.com/saro-list.pdf). It is Endangered in Connecticut, Ohio and Pennsylvania, Threatened in Michigan, and of Special Concern in Massachusetts. NatureServe assigns it a global rank of vulnerable (G3). v COSEWIC HISTORY The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) was created in 1977 as a result of a recommendation at the Federal-Provincial Wildlife Conference held in 1976. It arose from the need for a single, official, scientifically sound, national listing of wildlife species at risk. In 1978, COSEWIC designated its first species and produced its first list of Canadian species at risk. Species designated at meetings of the full committee are added to the list. On June 5, 2003, the Species at Risk Act (SARA) was proclaimed. SARA establishes COSEWIC as an advisory body ensuring that species will continue to be assessed under a rigorous and independent scientific process. COSEWIC MANDATE The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) assesses the national status of wild species, subspecies, varieties, or other designatable units that are considered to be at risk in Canada. Designations are made on native species for the following taxonomic groups: mammals, birds, reptiles, amphibians, fishes, arthropods, molluscs, vascular plants, mosses, and lichens. COSEWIC MEMBERSHIP COSEWIC comprises members from each provincial and territorial government wildlife agency, four federal agencies (Canadian Wildlife Service, Parks Canada Agency, Department of Fisheries and Oceans, and the Federal Biodiversity Information Partnership, chaired by the Canadian Museum of Nature), three non-government members and the co-chairs of the species specialist and the Aboriginal Traditional Knowledge subcommittees. The Committee meets to consider status reports on candidate species. DEFINITIONS (NOVEMBER 2004) Wildlife Species A species, subspecies, variety, or geographically or genetically distinct population of animal, plant or other organism, other than a bacterium or virus, that is wild by nature and it is either native to Canada or has extended its range into Canada without human intervention and has been present in Canada for at least 50 years. Extinct (X) A wildlife species that no longer exists. Extirpated (XT) A wildlife species no longer existing in the wild in Canada, but occurring elsewhere. Endangered (E) A wildlife species facing imminent extirpation or extinction. Threatened (T) A wildlife species likely to become endangered if limiting factors are not reversed. Special Concern (SC)* A wildlife species that may become a threatened or an endangered species because of a combination of biological characteristics and identified threats. Not at Risk (NAR)** A wildlife species that has been evaluated and found to be not at risk of extinction given the current circumstances. Data Deficient (DD)*** A wildlife species for which there is inadequate information to make a direct, or indirect, assessment of its risk of extinction. * Formerly described as “Vulnerable” from 1990 to 1999, or “Rare” prior to 1990. ** Formerly described as “Not In Any Category”, or “No Designation Required.” *** Formerly described as “Indeterminate” from 1994 to 1999 or “ISIBD” (insufficient scientific information on which to base a designation) prior to 1994. Environment Environnement Canada Canada Canada Canadian Wildlife Service canadien Service de la faune The Canadian Wildlife Service, Environment Canada, provides full administrative and financial support to the COSEWIC Secretariat. vi Update COSEWIC Status Report on the Hill's Pondweed Potamogeton hillii in Canada 2005 TABLE OF CONTENTS SPECIES INFORMATION............................................................................................... 3 Name and classification............................................................................................... 3 Description................................................................................................................... 3 DISTRIBUTION............................................................................................................... 4 Global range ................................................................................................................ 4 Canadian range ........................................................................................................... 5 HABITAT .........................................................................................................................7
Load more

Recommended publications
  • Elodea Genus: Egeria Or Elodea Family: Hydrocharitaceae Order: Hydrocharitales Class: Liliopsida Phylum: Magnoliophyta Kingdom: Plantae
    Elodea Genus: Egeria or Elodea Family: Hydrocharitaceae Order: Hydrocharitales Class: Liliopsida Phylum: Magnoliophyta Kingdom: Plantae Conditions for Customer Ownership We hold permits allowing us to transport these organisms. To access permit conditions, click here. Never purchase living specimens without having a disposition strategy in place. The USDA does not require any special permits to ship and/or receive Elodea except in Puerto Rico, where shipment of aquatic plants is prohibited. However, in order to continue to protect our environment, you must house your Elodea in an aquarium. Under no circumstances should you release your Elodea into the wild. Primary Hazard Considerations Always wash your hands thoroughly before and after you handle your Elodea, or anything it has touched. Availability Elodea is available year round. Elodea should arrive with a green color, it should not be yellow or “slimy.” • Elodea canadensis—Usually bright green with three leaves that form whorls around the stem. The whorls compact as they get closer to the tip. Found completely submerged. Is generally a thinner species of Elodea. Has a degree of seasonality May–June. • Egeria densa—Usually bright green with small strap-shaped leaves with fine saw teeth. 3–6 leaves form whorls around the stem and compact as they get closer to the tip. Usually can grow to be a foot or two long. Is thicker and bushier than E. canadensis. Elodea arrives in a sealed plastic bag. Upon arrival, this should be opened and Elodea should be kept moist, or it should be placed in a habitat. For short term storage (1–2 weeks), Elodea should be placed in its bag into the refriger- ator (4 °C).
    [Show full text]
  • Potamogeton Hillii Morong Hill's Pondweed
    Potamogeton hillii Morong Hill’sHill’s pondweed pondweed, Page 1 State Distribution Best Survey Period Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov Dec Status: State threatened 1980’s. The type locality for this species, in Manistee County, has been destroyed. Global and state rank: G3/S2 Recognition: The stem of this pondweed is slender Other common names: pondweed and much branched, reaching up to 1 m in length. The alternate leaves are all submersed, and very narrow Family: Potamogetonaceae (pondweed family) (0.6-2.5 mm), ranging from 2-6 cm in length. The leaves are characterized by having three parallel veins Synonyms: Potamogeton porteri Fern. and a short bristle tip. The stipules are relatively coarse and fibrous (shredding when old) and are free Taxonomy: An extensive molecular analysis of the from each other and the leaf stalk bases. Short Potamogetonaceae, which largely corroborates the (5‑15 cm), curved fruiting stalks (peduncles) are separation of broad-leaved versus narrow-leaved terminated by globose flower/fruit clusters that pondweed species, is provided by Lindqvist et al. arise from leaf axils or stem tips. The tiny (2-4 mm) (2006). fruits have ridges along the backside. Other narrow- leaved species that lack floating leaves have either Range: This aquatic plant is rare throughout much of narrower leaves ( less than 0.5 mm in width, such as its range, which extends from Vermont to Michigan, and P. confervoides and P. bicupulatus), stipules that are south to Pennsylvania. Centers of distribution appear attached near their bases (P. foliosus, P. pusillus), to be in western New England and the north central longer peduncles (1.5-4 mm) (P.
    [Show full text]
  • Potamogeton Ogdenii Hellquist & Hilton Ogden's Pondweed
    New England Plant Conservation Program Potamogeton ogdenii Hellquist & Hilton Ogden's Pondweed Conservation and Research Plan for New England Prepared by: C. Barre Hellquist and Timothy Mertinooke-Jongkind Massachusetts College of Liberal Arts North Adams, Massachusetts 01247 For: New England Wild Flower Society 180 Hemenway Road Framingham, MA 01701 508/877-7630 e-mail: [email protected] • website: www.newfs.org Approved, Regional Advisory Council, December 2002 i SUMMARY Potamogeton ogdenii Hellquist & Hilton (Potamogetonaceae) is a rare aquatic vascular plant historically reported at 18 locations worldwide: 11 in New England, five in New York, and two in Ontario. In New England, there are six current sites; worldwide, there are ten extant sites. It is listed G1 globally, and S1 by Vermont, Massachusetts, and New York. It is a fertile hybrid found in ponds, lakes, and slow moving streams with high alkalinity. Potamogeton ogdenii faces serious threats to its survival because of eutrophication, competition with invasive species, its restricted habitat, and low population numbers. Conservation Objectives 1. Maintain and improve the conditions at the six current locations in New England with an eventual goal of 15-20 sites with 500-1000 plants in 20 years 2. Conduct extensive searches in New England in an attempt to locate 10-15 new, viable populations 3. Reduce competition with invasive species at P. ogdenii sites 4. Reduce eutrophication at present sites and at sites where it may occur in the future Conservation Actions Needed 1. Reduce eutrophication at P. ogdenii sites by imposing stricter septic laws, establish buffer zones along edges of waterways, and control runoff from paved surfaces 2.
    [Show full text]
  • Population Genetic Structure and Phylogeography of Invasive Aquatic Weed, Elodea Canadensis (Hydrocharitaceae) and Comparative Analyses with E
    Population genetic structure and phylogeography of invasive aquatic weed, Elodea canadensis (Hydrocharitaceae) and comparative analyses with E. nuttallii Tea Huotari Department of Agricultural Sciences Faculty of Agriculture and Forestry University of Helsinki Finland academic dissertation To be presented, with the permission of the Faculty of Agriculture and Forestry of the University of Helsinki, for public criticism in Auditorium 1041, Biocenter 2 (Viikinkaari 5, Helsinki), on October 5th, 2012, at 12 noon. helsinki 2012 Supervised by: Dr Helena Korpelainen Department of Agricultural Sciences University of Helsinki, Finland Dr Elina Leskinen Department of Environmental Sciences University of Helsinki, Finland Reviewed by: Dr Jouni Aspi Department of Biology University of Oulu, Finland Dr Alain Vanderpoorten Department of Life Sciences University of Liége, Belgium Examined by: Prof. Katri Kärkkäinen The Finnish Forest Research Institute Oulu, Finland Custos: Prof. Teemu Teeri Department of Agricultural Sciences University of Helsinki, Finland © Wiley (Chapter I) © Springer (Chapter II) © Elsevier (Chapter III) © Authors (Chapter IV) © Hanne Huotari (Layout) isbn 978-952-10-8258-0 (paperback) isbn 978-952-10-8259-7 (pdf) Yliopistopaino Helsinki, Finland 2012 Äidille List of original publications this thesis is based on the following publications and a manuscript, which are referred to in the text by their Roman numerals: I Huotari, T., Korpelainen, H. and Kostamo, K. 2010. Development of microsatellite markers for the clonal water weed Elodea canadensis (Hydrocharitaceae) using inter-simple sequence repeat (ISSR) primers. – Molecular Ecology Resources 10: 576–579. II Huotari, T., Korpelainen, H., Leskinen, E. and Kostamo, K. 2011. Population genetics of invasive water weed Elodea canadensis in Finnish waterways.
    [Show full text]
  • Ogden's Pondweed (Potamogeton Ogdenii) Conservation and Research Plan for New England
    Species at Risk Act Recovery Strategy Series Adopted under Section 44 of SARA Recovery Strategy for Ogden’s Pondweed (Potamogeton ogdenii) in Canada Ogden’s Pondweed 2016 Recommended citation: Environment Canada. 2016. Recovery Strategy for Ogden’s Pondweed (Potamogeton ogdenii) in Canada. Species at Risk Act Recovery Strategy Series. Environment Canada, Ottawa. 15 pp. + Annexes. For copies of the recovery strategy, or for additional information on species at risk, including the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) Status Reports, residence descriptions, action plans, and other related recovery documents, please visit the Species at Risk (SAR) Public Registry1. Cover illustration: © C.B. Hellquist Également disponible en français sous le titre « Programme de rétablissement du potamot d’Ogden (Potamogeton ogdenii) au Canada » © Her Majesty the Queen in Right of Canada, represented by the Minister of the Environment, 2016. All rights reserved. ISBN 978-0-660-03379-2 Catalogue no. En3-4/207-2016E-PDF Content (excluding the illustrations) may be used without permission, with appropriate credit to the source. 1 http://www.registrelep-sararegistry.gc.ca RECOVERY STRATEGY FOR OGDEN’S PONDWEED (Potamogeton ogdenii) IN CANADA 2016 Under the Accord for the Protection of Species at Risk (1996), the federal, provincial, and territorial governments agreed to work together on legislation, programs, and policies to protect wildlife species at risk throughout Canada. In the spirit of cooperation of the Accord, the Government of Ontario has given permission to the Government of Canada to adopt the Recovery Strategy for Ogden’s Pondweed (Potamogeton ogdenii) in Ontario (Part 2) under Section 44 of the Species at Risk Act (SARA).
    [Show full text]
  • Taxonomic Monographs in Relation to Global Red Lists
    51 February 2002: 155–158 Kirschner & Kaplan Red Lists and taxonomy BIODIVERSITY AND CONSERVATION Taxonomic monographs in relation to global Red Lists Jan Kirschner & denek Kaplan Department of Botany, Czech Academy of Sciences, CS-252 43 Pruhonice u Prahy, Czech Republic. kirsvh- [email protected] (author for correspondence); [email protected]. Upon comparison with recent monographs of Juncaceae and Potamogetonaceae, the 1997 IUCN Red List of Threatened Plants is shown to be an inadequate information source for conservation decisions. A substantial proportion of names listed in the IUCN RL represent synonyms, often belonging to widespread taxa, or remain doubtful taxonomically. If a new Red List is derived from the two new monographic accounts, and compared with the 1997 IUCN RL, the correct data from the latter represent 10–25% of the former. It may concluded that the overall accuracy of the IUCN list is rather low. The importance of global taxonomic monographs as a source of basic data for the accurate compilation of Red Lists is stressed. KEYWORDS: conservation, IUCN, Juncaceae, Potamogeonaceae, Red Lists, taxonomy. come from all over the world and cover the main diver- INTRODUCTION sity centres and complicated groups of the family. They Red lists (RLs) of threatened plants represent an are: Aaron Wilton (New Zealand), Adolf Ceska important information source for policy-makers and gov- (Canada), Barbara Ertter (California), Carmen Fernandez ernmental nature conservation authorities. Local and Carvajal (Spain), Futoshi Miyamoto (Japan), Henrik regional RLs use the IUCN criteria of classification of Balslev (Denmark), Henry Noltie (Scotland), Janice plants into categories of threat, and they are therefore Coffey-Swab (N.
    [Show full text]
  • Common Waterweed, Elodea Canadensis
    Report this plant! Stop the spread of Aquatic Invasive Species! If you think you have seen this plant, take a sample, photograph, and note location. Common Contact: Alaska Department of Fish & Game Waterweed , Osceola County 1-877-INVASIV (468-2748) or NY State DEC USFWS Elodea canadensis Fairbanks CWMA Follow these simple guidelines: 479-1213, [email protected] Identification: Remove all visible mud, plants, fish/animals from equipment • Leaves in whorls of 3 (occasionally 4) • Stem lighter green than leaves Eliminate water from all equipment before An invasive plant threat • transporting Stems grow in tangled mass Much of the recreational equipment we use have places where water can collect and harbor hitchhikers to Alaskan waters Clean and dry anything that came in contact with water Use hot (140°F) or salt water If possible, allow 5 days of drying before entering new waters Do not release or put plants, fish, or animals into a body of water unless they came out of that water body. Aquarium plants and animals may be able to survive in our Alaskan waters! Dispose of aquariums responsibly For more specific prevention guidelines, visit: Don’t let this happen to Alaska! Fairbanks Cooperative Weed Management Area 590 University Ave, Suite 2 Leaves: Growth form is Fairbanks, AK 99709 1/4 –1/2’’ long variable Phone: (907) 479-1213 1/8’’ wide, edges Email: [email protected] finely toothed www.fairbankssoilwater.org/resources_CWMA Examples of potential impacts from aquatic invasive plants Impacts Are other waters at risk? Elodea canadensis could impact local waters in Elodea prefers cool, clear, slow waters with silty Elodea in Alaska several ways.
    [Show full text]
  • The Herbivorous Insect Fauna of a Submersed Weed, Hydrilla Verticillata (Alismatales: Hydrocharitaceae)
    SESSION 5 Weeds of Aquatic Systems and Wetlands Proceedings of the X International Symposium on Biological Control of Weeds 307 4-14 July 1999, Montana State University, Bozeman, Montana, USA Neal R. Spencer [ed.]. pp. 307-313 (2000) The Herbivorous Insect Fauna of a Submersed Weed, Hydrilla verticillata (Alismatales: Hydrocharitaceae) C. A. BENNETT1 and G. R. BUCKINGHAM2 1 Department of Entomology and Nematology, University of Florida, and 2 USDA-ARS 1,2 Florida Biological Control Laboratory, P.O. Box 147100, Gainesville, Florida 32614-7100, USA Abstract Although relatively few insects have been reported to feed on submersed aquatic plants, field surveys on Hydrilla verticillata (L. F.) Royle for biological control agents have demonstrated that insect herbivores should be expected when surveying submersed aquatic plants in the native ranges. Beetles, or Coleoptera, especially the weevils (Curculionidae), are important herbivores. Weevils attack submersed plant species both when water is present and when water is absent during dry periods which leave the plants exposed. Pupal success appears to be the major determinant of weevil life cycle strategies. Donaciine leaf beetles (Chrysomelidae) attack the roots or crowns of submersed species, but their feeding and damage is difficult to determine. Leaf-mining Hydrellia flies (Diptera: Ephydridae) are diverse and common on submersed species. Other flies, the midges (Chironomidae), are also common on submersed species, but many utilize the plants only for shelter. However, midge larvae ate the apical meristems on the tips of hydrilla stems. Aquatic caterpillars (Lepidoptera: Pyralidae) are the herbivores most eas- ily observed on submersed species because of their large size and conspicuous damage, but their host ranges might be too broad for use as biological control agents.
    [Show full text]
  • Elodea Nuttallii and Elodea Callitrichoides
    NOBANIS – Invasive Alien Species Fact Sheet Elodea canadensis, Elodea nuttallii and Elodea callitrichoides Author of this fact sheet: Melanie Josefsson, Department of Natural Resources, Swedish Environmental Protection Agency, SE106 48 Stockholm, Sweden, Telephone +46 10 698 1541, [email protected] Bibliographical reference – how to cite this fact sheet: Josefsson, M. (2011): NOBANIS - Invasive Species Fact Sheet – Elodea canadensis, Elodea nuttallii and Elodea callitrichoides – From: Online Database of the European Network on Invasive Alien Species – NOBANIS www.nobanis.org, Date of access x/x/201x. Species description Scientific name: Elodea canadensis Michx., Hydrocharitaceae Synonyms: Elodea canadensis: Elodea brandegeae St. John, Elodea latifolia Caspa, Elodea ioensis Wylie, Anacharis canadensis Scientific name: Elodea nuttallii Planch. St. John, Hydrocharitaceae Synonyms: Anacharis occidentalis (Pursh) St. John, Anacharis nuttallii Planchon, Elodea columbiana, Elodea minor Farw., Anacharis occidentalis (Pursh) Marie-Victorin, Serpicula occidentalis Pursh, Elodea canadensis var. angustifolia (Britton ex Rydb.) Farw. Scientific name: Elodea callitrichoides (Rich.) Casp, Hydrocharitaceae Synonyms: Elodea ernstiae H. St John Common names Elodea canadensis: Canadian waterweed (GB), Kanadische Wasserpest (DE), almindelig vandpest (DK), Kanada vesikatk (EE), (Kanadan) vesirutto (FI), Kanadine elodeja (LT), Kanādas elodeja (LV), Brede Waterpest (NL), Moczarka kanadyjska (PL), элодея канадская (RU), Vattenpest (SE), Vasspest (NO) Elodea nuttallii: Nuttall’s waterweed (GB), Schmalblättrige Wasserpest; Nuttalls Wasserpest (DE), smalbladet vandpest (DK), Kiehkuravesirutto (FI), Nutalla elodeja (LV), Smalle Waterpest (NL), Smal vattenpest (SE), Smal vasspest (NO) Elodea callitrichoides: Greater water-thyme (GB), South American waterweed (US), Argentinische Wasserpest (DE), Argentinsk vattenpest (SE) 1 Fig. 1. 2. 3 and 4. Elodea canadensis, photo by Paul Evald Hansen. Fig. 5 and 6. Elodea nuttallii, photo by Paul Evald Hansen.
    [Show full text]
  • Canadian Waterweed Elodea Canadensis Michx
    Canadian waterweed Elodea canadensis Michx. Synonyms: Anacharis canadensis (Michx.) Planch., A. canadensis var. planchonii (Caspary) Victorin, Elodea brandegeeae St. John, E. ioensis Wylie, E. linearis (Rydb.) St. John, E. planchonii Caspary, Philotria canadensis (Michx.) Britt., P. linearis Rydb. Other common names: American elodea, American waterweed, anacharis, bassweed, broad waterweed, Canada waterweed, Canadian pondweed, Canadian water pest, common waterweed, ditch moss, elodea, oxygen weed, water- thyme, waterweed Family: Hydrocharitaceae Invasiveness Rank: 79 The invasiveness rank is calculated based on a species’ ecological impacts, biological attributes, distribution, and response to control measures. The ranks are scaled from 0 to 100, with 0 representing a plant that poses no threat to native ecosystems and 100 representing a plant that poses a major threat to native ecosystems. Note on taxonomy: Canadian waterweed has been known to forms fertile hybrids with Nuttall’s waterweed (Elodea nuttallii) in natural environments (Cook and Urmi-Konig 1985). Laboratory crosses also yield fertile hybrids with viable seed (Ernst-Schwarzenbach 1945). Hybrids between these two species exhibit morphologically intermediate vegetative characteristics and are only distinguishable by their floral structures. Both species share geographic range and are native to most of temperate North America. Description Canadian waterweed is a perennial, freshwater, aquatic plant with submerged leaves and fibrous roots. Stems are branched at the nodes, slender, leafless near the base, and usually 20 to 100 cm long. Leaves are usually arranged in whorls of three but are occasionally opposite on the lower stem. Whorls are up to 2 cm apart on the lower stem but become crowded towards the upper stem.
    [Show full text]
  • Environmental Assessment
    Anchorage Lakes Elodea Eradication Project: Environmental Assessment Public Review Draft Alaska Department of Natural Resources Division of Agriculture May 2015 Plant Materials Center 5310 S. Bodenburg Spur Palmer, Alaska 99645 Table of Contents Title Page 1.0 Introduction…………………………………………………………………………………………………………………………1 1.1 Need for Action and Project Goals……………………………………………………………………………1 1.2 Background: Elodea in Alaska…………………………………………………………………………………..1 1.2.1 Elodea Impacts………………………………………………………………………………………..3 1.3 Legal Authorities………………………………………………………………………………………………………3 1.4 Proposed Action…….………………………………………………………………………………………………..4 1.5 Location of Project……………………………………………………………………………………………………4 1.5.1 Elodea Survey Results and Lake Characteristics……………………………………….5 2.0 Alternatives………………………………………………………………………………………………………………………….7 2.1 Alternative 1: No Eradication or Control of Elodea……………………………………………………7 2.2 Alternative 2: Mechanical Removal…………………………………………………………………………..7 2.3 Alternative 3: Benthic Barriers………………………………………………………………………………….7 2.4 Alternative 4: Drawdown………………………………………………………………………………………….7 2.5 Alternative 5: Fluridone Treatment (Proposed Action)…….……………………………………….8 2.5.1 Description of fluridone…………………………………………………………………………..8 2.5.2 Description of proposed fluridone treatment………………………………………..10 3.0 Affected Environment………………………………………………………………………………………………………..12 3.1 Physical Environment……………………………………………………………………………………………..12 3.1.1 Land Resources…………………………………………………………………………………..…12 3.1.2 Water Resources…………………………………………………………………………………..12
    [Show full text]
  • Elodea Canadensis Global Invasive
    FULL ACCOUNT FOR: Elodea canadensis Elodea canadensis System: Terrestrial Kingdom Phylum Class Order Family Plantae Magnoliophyta Liliopsida Hydrocharitales Hydrocharitaceae Common name Kanadan vesirutto (Finnish), Kanadese waterpes (Afrikaans), Vasspest (Norwegian), broad waterweed (English, United States), peste d'eau (French), Vandpest (English), Kanada vesikatk (Estonian), Kanada vesihain (Estonian), ditch moss (English), elodeja (Latvian), vandpest (Danish), oxygen weed (English, United States), anacharis (English), Canada waterweed (English, United States), Kanadine elodeja (Lithuanian), common waterweed (English, United States), Kanadische wasserpest (German), water- thyme (English, United States), Canadian water pest (English, United States), vesirutto (Finnish), Moczarka kanadyjska (Polish), Vattenpest (Swedish), vanlig vattenpest (Swedish), Peste d'aqua comune (Italian), brede waterpest (Dutch), Almindelig vandpest (Danish), Canadian waterweed (English, United States), American elodea (English, United States), gemeine wasserpest (German), elodee du Canada (French), American waterweed (English, Germany), Canadian pondweed (English, United States) Synonym Anarcharis canadensis , Planch Anarcharis alsinastrum , Bab. Anarcharis planchonii , Caspary) Rydb. Anarcharis pomeranica , (Rchb.) Peterm. Elodea brandegeeae , St. John Elodea ioensis , Wylie Elodea latifolia , Caspary Elodea linearis , (Rydb.) St. John Elodea oblongifolia , Michx. Ex Caspary Elodea planchonii , Caspary Helodea canadensis , Reichb. Philotria canadensis , (Michx.)
    [Show full text]