Vegetation (Floating River Vegetation) - Office of Public Works

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Latin Name English Name Potamogeton alpinus (Red Pondweed) Habitat Still or slow flowing water, canals or ditches Leaf Description Narrow pointed leaves sometimes floating Flower Description Short green flower spike Potamogeton berchtoldii (Small Pondweed) Still or slow flowing freshwater Slender dark – pale green leaves Small flower spike Potamogeton crispus (Curled Pondweed) Deep still flowing freshwater Wavy toothed narrow oblong leaves Small flower spike Potamogeton coloratus (Fen Pondweed) Shallow water especially fens Broad oval red leaves floating or submerged XXIV Potamogeton filiformis (Slender-leaved Pondweed) Shallow still water near the sea Blunt tipped leaves often in tufts Small flower spike Submerged flowers Water type Avoids lime Lime Avoids acid Lime Brackish water Distinguishing Feature Dried leaves are red colour. Latin Name English Name Potamogeton freseii (Flat-stalked Pondweed) Habitat Still water canals, ditches, rivers, lakes Leaf Description Narrow pointed leaves Flower Description Thickened flower stalk Stems slightly flattened Potamogeton gramineus (Variousleaved Pondweed) Shallow water fens, ditches, canals Floating oval leaves, narrow submerged leaf Flower on short spike Potamogeton lucens (Shining Pondweed) Still slow moving water Broad wavy submerged leaves Long stout flower spike Potamogeton natans (Broad-leaved Pondweed) Still or slow moving water Floating leaves long broad elliptical or oval Water type Lime Acid Lime Freshwater Acid Distinguishing Feature Flattened stems Most common pondweed Flattened stems Potamogeton obtusifolius (Blunt-leaved Pondweed) Shallow ponds or lakes Blunt laves 2.5-3.5mm wide
Latin Name English Name Potamogeton pectinatus Fennel Pondweed Habitat Still/ slow flowing rivers, or brackish water Leaf Description Dark green pointed leaves 4mm – 1m long Flower Description Compact flower Potamogeton perfoliatus Perfoliate Pondweed Deep still or slow flowing water Stem embraced by submerged oval leaves Long stalked flower spike Potamogeton polygonifolius Bog Pondweed Shallow water and bog flushes Floating oval leaves with tint red. Small dense flower spike Potamogeton praelongus Long-stalked Pondweed Deep lakes and rivers Submerged wavy leaf arranged zig zag on stem Aerial flower spike A summary of the ecological characteristics of floating river vegetation geographically distributed in Ireland (Blamey et al., 2003, EUNIS website, Hale, A., Spink, 1992, Webb et al., 1996) XXV Potamogeton pusillus Lesser Pondweed Sometimes brackish water Sharply pointed leaves 1-2mm wide Small flower spike Water type Lime Freshwater Acid Lime Avoids acid Distinguishing Feature Can cope with pollution Latin Name English Name Berula erecta Lesser Water Parsnip Habitat Still water, ditches, fens and marshes. Leaf Description From five to nineteen leaf pairings along leaf stalk Flower Description Large white flower head of multiple tiny flowers Zannichellia paultris Horned Pondweed Still, slow water ponds, lakes or brackish water Submerged filament leaves Submerged green tiny flower no petals Groenlandia densa Opposite leaved pondweed Fontinalis antipyretica Aquatic Moss Rivers and canals Shallow slow flowing rivers and streams Short wavy submerged leaves arranged oppositely along the stem Small stalked flower head green brown colour curves downwards Dark green leaves in three rows along stem slightly overlapping No flowers spores produced instead Water type Freshwater Lime Lime Slightly acidic Distinguishing Feature
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ISSN 1649 - 9840 SERIES OF ECOLOGIC
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Foreword This Ecological Impact Ass
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Executive Summary Table of Contents
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1.0 Introduction This study was com
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and fauna. The OPW has a multi-annu
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Currently twenty-one Special Areas
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2.1.4 Lower River Shannon Special A
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2.2.4 Site elevations within the Lo
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2.3.4 Site integrity of the Lower R
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3.0 Ecological Assessment of Water
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3.2 Distribution and extent of floa
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3.2.1 Floating river vegetation of
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aquatic moss. 3.2.3 Floating river
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3.2.5 Floating river vegetation wit
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Starwort, Callitriche species •Ro
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Each form of reproduction requires
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prevented aquatic growth. Water lev
Page 35 and 36: G.densa was the dominant floating r
Page 37 and 38: 4.0 Description of maintenance oper
Page 39 and 40: consultation with the Foreman / Tec
Page 41 and 42: 4.3 River corridor water dynamics A
Page 43 and 44: Not shown in the above data set is
Page 45 and 46: 4.4 Physical, chemical and biologic
Page 47 and 48: •Survey watercourses to determine
Page 49 and 50: The primary riverbed substrate of w
Page 51 and 52: gravel require loosening assess the
Page 53 and 54: • Livestock should be restricted
Page 55 and 56: River Breagagh Winter 2006 River Br
Page 57 and 58: River Breagagh Winter 2006 Ranuncli
Page 59 and 60: 6.0 Conclusion and summary •Arter
Page 61 and 62: References •Blamey, M., Fritter,
Page 63 and 64: Appendix A - Special Areas of Conse
Page 65 and 66: Lower River Shannon Special Areas o
Page 67 and 68: Channel name Location coordinates E
Page 69 and 70: Appendix C - Habitat classification
Page 71 and 72: Lower River Shannon Special Area of
Page 73 and 74: Lough Corrib Special Area of Conser
Page 75 and 76: 7 Lower River Suir Special Area of
Page 77 and 78: C1 Lower River Shannon Special Area
Page 79 and 80: 6 C1/12/2 C1/18/1/1 /14/7/3 C/20/1
Page 81 and 82: Appendix E - Physical parameters re
Page 83 and 84: River Barrow and River Nore Special
Page 85: Latin Name English Name Appendix F
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Vegetation (Floating River Vegetation) - Office of Public Works

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