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Water en land

Mens en Milieu

Moss capsules, Foto Fitis, www.fotofitis.nl

Moss on northern dune slopes

Northern dune slopes are often more suitable for moss than southern slopes, since they are less exposed to direct sunlight. This is also where the most species of mosses related to the Dutch coast are found. The richness in calcium determines which species are found. Examples of species which grow on calcium-rich soils on northern slopes are canary thread-moss, golden feather-moss, awl-leaved screw-moss and rose-moss. Other species with less preference for calcium include glittering wood-moss, big shaggy-moss, brittle swan-neck moss, common striated feather-moss, rock pocket-moss, indian feather-moss, capitate notchwort and tamarisk scalewort.

  • Glittering wood-moss
    Glittering wood-moss, www.andrewspink.nl

    In the Netherlands, glittering wood-moss is often found growing together with big shaggy-moss on northern dune slopes. It also grows inland on northern slopes in heath fields and pine forests, however is less common. The species is sensitive to acidification, which is more abundant inland. The glossy green color, red stem and its way of forming various levels per stem are typical features of this moss.

    While glittering wood-moss is listed as vulnerable on the Dutch Red List, it is considered common in England. Here it grows in a different habitat, namely acidic grasslands, heath fields and moorlands. It grows abundantly between grass and heath in these habitats.

    • Dut: Glanzend etagemos
    • Lat: Hylocomium splendens
    • Eng: Glittering wood-moss, step moss
  • Big shaggy-moss
    Big shaggy-moss, Heike Hofmann, www.flickr.com

    Big shaggy-moss is also a rare species, just like glittering wood-moss. However, it is still fairly common in the dunes. Conditions on northern dune slopes is exactly what this species needs. It also grows along paths and roads. Big shaggy-moss is not restricted to the coast. It can grow on soils varying in calcium content, from acidic to calcium-rich, explaining its presence in lime-rich South-Limburg.

    Big shaggy-moss lives up to its name: it is bushy in form and has a shaggy appearance. It has a red stem which can grow between 5 and 20 cm long!

    • Ned: Pluimstaartmos
    • Lat: Rhytidiadelphus triquetrus
    • Eng: Big shaggy-moss
  • Brittle swan-neck moss
    Brittle swan-neck moss, JPFrahm-www.azoresbioportal.angra.uac.pt

    Brittle swan-neck moss is an extremely rare moss species in the Netherlands. It is found almost exclusively by Bergen and on Texel, on calcium-poor northern dune slopes as long as they are not too acidic. However, in England, brittle swan-neck moss grows on more calcium-rich grasslands, shell sands and sandstone rocks. When moist, this moss is yellow-green in color. When dried up, it has a whitish appearance.

    • Dut: Bossig kronkelsteeltje
    • Lat: Campylopus fragilis
    • Eng: Brittle swan-neck moss
  • Canary thread-moss
    Canary thread-moss, Michael Lueth

    Canary thread-moss grows on calcium-rich northern dune slopes. It a a very rare species in the Netherlands, growing primarily along the southern North-Holland coast and Texel. It is a species from the Mediterranean region, having only been discovered in this country in 1989. Canary thread-moss grows on calcium-rich northern dune slopes. However it is also found on dry grasslands among calcium-rich pioneer vegetation, often together with great hairy screw-moss, yellow-crisp-moss and bendy ditrichum moss.

    • Dut: Getand knikmos
    • Lat: Bryum provinciale, Bryum canariense
    • Eng: Canary thread-moss
  • Golden feather-moss
    Golden feather-moss, Des Callaghan

    Golden feather-moss is a slender moss, growing in green or yellowish patches. It is a rare, vulnerable species, found primarily in two areas in the Netherlands: South-Limburg and the calcium-rich Holland dunes. It requires lots of calcium to grow. In the dunes, it is found mostly in open areas on northern slopes. However, it can also grow calcium-rich damp grasslands and marshes.

    • Dut: Kalkgoudmos
    • Lat: Campyuliadelphus chrysophyllus
    • Eng: Golden feather-moss
  • Common striated feather-moss
    Common striated feather-moss, www-andrewspink-nl

    In the dunes, common striated feather-moss grows on humus-rich sand in areas where there's no direct sunlight. It is a common species, not restricted to the coast. Outside of the dunes, you find it growing in nutrient-rich, humus soils in woods, on rocks and at the foot of trees. It can cover large areas of the forest floor, providing a home for many insects. Birds looking for food will upturn common striated feather-moss, leaving behind tufts of moss.

    • Dut: Geplooid snavelmos
    • Lat: Eurhynchium striatum
    • Eng: Common striated feather-moss
  • Awl-leaved screw-moss
    Awl-leaved screw-moss, Michael Lueth

    Awl-leaved screw-moss is fairly common in the Dutch dunes. As long as there is some calcium in the bottom and it's not too sheltered, it will grow just about everywhere. It grows particularly well on open northern dune slopes where there is still calcium in the soil. More inland, awl-leaved screw-moss has been declining strongly. It is not known why this species is having such a difficult time.

    Thanks to its extremely long capsule, it is not easy to mistake this moss for any other species. The Dutch name is literally 'long- capsuled star'.

    • Dut: Langkapselsterretje
    • Lat: Tortula subulata
    • Eng: Awl-leaved screw-moss
  • Rose-moss
    Rose-moss, amadej2008, via www.flickr.com

    You only find rose-moss nowadays for the most part in calcium-rich dunes. It is often found in the vicinity of yellow ant nests.

    • Dut: Rozetmos
    • Lat: Rhodobryum roseum
    • Eng: Rose-moss
  • Rock pocket-moss
    Rock pocket-moss, Barry Stewart

    Rock pocket-moss, also known as maidenhair pocket-moss, grows mainly on coastal dunes and peat bogs.

    • Dut: Groot veen-vedermos
    • Lat: Fissidens dubius, Fissidens adianthoides
    • Eng: Rock/Maidenhair pocket-moss
  • Indian feather-moss
    Indian feather-moss, Jonathan Sleath

    You find indian feather-moss on the Wadden Islands, particularly on northern dune slopes.

    • Dut: Duinsnavelmos
    • Lat: Rhynchostegium megapolitanum
    • Eng: Indian / Megapolitian feather-moss
  • Capitate notchwort
    Capitate notchwort, Michael Lueth

    Of all the liverworts, Capitate notchwort is the most bonden to the coast.

    • Dut: Duintrapmos
    • Lat: Lophozia excisa
    • Eng: Capitate notchwort
  • Tamarisk Scalewort
    Tamarisk Scalewort, Ian Atherton

    Tamarisk Scalewort is liverwort found on northern slopes in the dunes. In the Netherlands, this species is only found in the dunes on Texel and in Castricum. Elsewhere it has become very rare. While tamarisk scalewort grows on the ground in the dunes, elsewhere it is found growing as an epiphyte, on other plants.

    • Dut: Flesjes roestmos
    • Lat: Frullania tamarisci
    • Eng: Tamarisk scalewort