Categorii: Tot - arctic - vegetation - climate

realizată de Monika Urbanczyk 2 ani în urmă

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Tundra

The tundra biome is divided into several types, including forest-tundra, dwarf tundra, moss-lichen tundra, and arctic tundra. Located mainly between the North Pole and the taiga region, the arctic tundra is characterized by extremely cold temperatures and permafrost.

Tundra

Tundra

ECOREGIONS

ANTARCTIC
Transantarctic Mountains tundra
Southern Indian Ocean Islands tundra
South Victoria Land tundra
South Orkney Islands tundra
South Antarctic Peninsula tundra
Scotia Sea Islands tundra
Prince Charles Mountains tundra
Northwest Antarctic Peninsula tundra
Northeast Antarctic Peninsula tundra
North Victoria Land tundra
Marie Byrd Land tundra
Enderby Land tundra
Ellsworth Mountains tundra
Ellsworth Land tundra
East Antarctic tundra
Dronning Maud Land tundra
Central South Antarctic Peninsula tundra
Adelie Land tundra
PALEARCTIC
Yamal-Gydan tundra
Wrangel Island Arctic desert
Trans-Baikal Bald Mountain tundra
Taimyr-Central Siberian tundra
Russian Bering tundra
Russian Arctic desert
Novosibirsk Islands Arctic desert
Northwest Russian-Novaya Zemlya tundra
Northeast Siberian coastal tundra
Kola Peninsula tundra
Kamchatka tundra
Chukchi Peninsula tundra
Cherskii-Kolyma mountain tundra
NEARCTIC
Torngat Mountain tundra
Pacific Coastal Mountain icefields and tundra
Ogilvie-MacKenzie alpine tundra
Kalaallit Nunaat Arctic steppe
Interior Yukon-Alaska alpine tundra
Davis Highlands tundra
Canadian Middle Arctic Tundra
Canadian Low Arctic tundra
Brooks-British Range tundra
Beringia upland tundra
Beringia lowland tundra
Arctic foothills tundra
Arctic coastal tundra
Aleutian Islands tundra
Alaska-St. Elias Range tundra
Ahklun and Kilbuck Upland Tundra
AUSTRALASIA
Antipodes Subantarctic Islands tundra

ESSENTIAL

1. Forest-tundra

2. Dwarf tundra

3. Moss-lichen tundra

4. Arctic tundra

https://www.mindomo.com/mindmap/9d561b3a0eca4e95b62762fdc4f666df

https://pl.wikipedia.org/wiki/Tundra_krzewinkowa

BIOME ESSENTIAL
Canadian High Arctic tundra

Oxyria digyna

Dryas integrifolia

Luzula confusa

Alopecurus alpinus

Pleuropogon sabinei

Dupontia fisheri

Eriophorum angustifolium

Carex aquatilis

Kalaallit Nunaat High Arctic tundra

50% of the territory is bare rock and ice, or very sparse vegetation. 30% of the ecoregion has a cover of moss and lichen, and another 3% of herbaceous cover and shrubs

Some small areas on the east coast have greater plant life around

hot springs, particularly marsh willowherb (Epilobium palustre)) andthe northern green orchid (Platanthera hyperborea)

Studies have identified eight types of vegetation on the east coast from 72 to 79° N:

Dwarf shrub heaths (Cassiope tetragona

, Salix arctica

, Vaccinium uliginosum

or Betula nana

,

Grasslands (dry in summer: Arctagrostis latifolia

, Carex bigelowii

, sooty sedge (Carex misandra

), and Eriophorum triste

)

Permanently wet fens (Carex stans

, Eriophorum scheuchzeri

, and Arctagrostis latifolia)

Snowbeds (Phippsia algida

, Salix herbacea

, Trisetum spicatum

and Erigeron humilis)

;

Open, graminoid Dryas-heaths and fellfields on dry soil (Carex nardina

, Carex rupestris

, and Kobresia myosuroides)

;

Fellfields (Calamagrostis purpurascens

and Carex supina

)

Communities on wet ground that is covered by an organic crust (Koenigia islandica

and Festuca hyperborea

);

Halophytic vegetation (Puccinellia phryganodes

and Carex subspathacea

).

Platanthera hyperborea

Epilobium palustre

Carex (Sedge)

Carex rupestris

Carex nardina

Carex misandra

Carex subspathacea

Trisetum spicatum

Puccinellia phryganodes

Calamagrostis purpurascens

Eriophorum triste

Carex supina

Scandinavian Montane Birch forest and grasslands

Stekenjokk (vildmarksvägen)

Ljungdalsfjällen

Early June

Hardangervidda (Eidfjord)

FLOWERS

GRASS

GROUND

October

September

August

July

June

LICHES

Stereocaulon

Flavocetraria nivalis

Cetraria

Cetraria ericetorum

Cetraria islandica

Cladonia stellaris

Cladonia crispata

Cladonia arbuscula

Sphagnum

Sphagnum squarrosum

Sphagnum girgensohnii

FLOWERS/HERBS

Equisetum fluviatile

arabis alpina

pinguicula vulgaris

Geranium sylvaticum

ranunculus acris

comarum palustre

Maianthemum bifolium

Aconitum lycoctonum

Melampyrum sylvaticum

Arnica angustifolia

Oxalis acetosella

GRASS/SEDGE

Eriophorum brachyantherum

Deschampsia

Deschampsia alpina

Deschampsia flexuosa

Festuca

Festuca ovina

Poa

Poa pratensis

Poa alpina

SHURBS

Salix arbuscula

Salix polaris

Salix caprea

Empentrum

Empetrum hermaphroditum

Pinus pumila

Vaccinium myrtillus

TREES

The treeline forest of these high mountains is the only one in the Northern tundra not to be composed of conifers: it is a tangle of downy birch.

https://www.oneearth.org/ecoregions/scandinavian-montane-birch-forest-and-grasslands/

http://www.diva-portal.org/smash/get/diva2:565333/FULLTEXT01.pdfBengt

DECIDUOUS

Betula pubescens

mossy birch

Prunus padus

Sorbus aucuparia

Alnus incana

Populus tremula

CONIFEROUS

Sometimes much of the lowland forest near the fjords of Western Norway is also included as Norway spruce is mostly absent here (both Norway spruce and Sitka spruce are commonly planted for economic reasons).

Picea

Picea obovata hybrid Picea × fennica

Pinus sylvestris

TERRAIN

GROUND TYPES / SOIL / ROCK

lakes

Jämtlandsfjällen, Sweden

Abisko, Sweden

Hardangervidda, Norway

Syenite

Schist

Parts of the ecoregion are located in smaller mountain areas surrounded by lower elevation biomes, as is the case with coastal mountains in Norway. At the highest altitude is high alpine tundra with very modest vegetation and bare rock, skree, snowfields and glaciers. At lower altitude is low alpine tundra with continuous plant cover; dwarf birch and willows up to 1 m tall and grasslands, as well as numerous lakes and bogs. At still lower altitude is the adjacent montane birch zone with small (2–5 m) mountain downy birch (Betula pubescens) above the conifer tree line; some stunted spruce and pine, and many lakes and bogs. This part is regarded as part of the High boreal (sparse taiga) vegetation zone; birch forming the treeline is very rare outside Scandinavia (also in Iceland and the Kamtchatka peninsula).

BIOME ESSENTIAL

Tundra

The arctic tundra is located between the north pole and the coniferous forests or taiga region. It is characterized by extremely cold temperatures and land that remains frozen year-round. Arctic tundra occurs in frigid mountaintop regions at very high elevations.


Alpine tundra can be found in high elevations anywhere in the world, even in tropic regions. Although the land is not frozen year-round as in arctic tundra regions, these lands are typically covered in snow for most of the year.


The difference between the Arctic and Alpine tundra is that the soil in the Alpine tundra region is not permanently frosted. Therefore, small shrubs are visible in the Alpine tundra region.



Arctic Tundra:

Alpine Tundra:

COMPONENTS

For this biome

most typical and representative species of:

trees

shrubs

grass

mosses

lichens

soil

rocks

other

LICHENS

Nephroma arcticum

Dactylina arctica

Cladonia

Cladonia borealis

Cladonia rangiferina

Rhizocarpon geographicum

MOSSES

Moss will grow in wide and thick clumps, but what looks like a giant plant is actually hundreds of little tiny plants growing closely together. Growing in bundles allows plants to be sheltered from the harsh conditions, so it is an effective adaptation for many plants in the tundra.

Diphasiastrum alpinum

Fissidens adianthoides

Syntrichia ruralis

Hylocomium splendens

Polytrichum strictum

Dicranum scoparium

Racomitrium canescens

Drepanocladus aduncus

Aulacomnium palustre

Calliergon giganteum

Calliergongiganteum

FLOWERS / HERBS

During the summer the wildflowers bloom quickly and beautifully. There are 400 different flowers in the arctic tundra. Most of the flowers that survive in the tundra are perennials; they lay dormant in the cold winters and grow again from the same roots in the summer.

Veronica alpina

Antennaria alpina

Bartsia alpina

Pedicularis flammea

Campanula uniflora

Erigeron humilis

Saxifraga

Saxifraga oppositifolia

Saxifraga paniculata

Saxifraga cespitosa

Gentiana nivalis

Rhododendron tomentosum

Papaver radicatum

Rubus chamaemorus

Silene acaulis

Chamaenerion latifolium

Pulsatilla vulgaris SOURCE?

GRASS / SEDGE

The ground of the arctic tundra is marshy and boggy during the summer, so plants must be able to survive in water-logged areas. Seasonal grass thrive anywhere there is a little bit of soil and enough water. You will often see clumps of grass growing in marshy areas of the arctic tundra.

Festuca vivipara

Carex

Carex scirpoidea

Carex bigelowii

Carex rufina

Puccinellia vahliana

Phippsia algida

Arctagrostis latifolia

Eriophorum

Eriophorum callitrix

Eriophorum triste

Eriophorum scheuchzeri

Polygonum viviparum

Poa arctica

Alopecurus magellanicus

SHRUBS

Empetrum nigrum

Arctostaphylos alpina

Lonicera caerulea

Salix

Salix arctica

Salix planifolia

Salix lapponum

close to the river

Cassiope tetragona

Vaccinum

vaccinium myrtillus

Vaccinium uliginosum

Vaccinium vitis-idaea

Amelanchier alnifolia

Dasiphora fruticosa

Ribes triste

Arctostaphylos

Dryas octopetala

DWARF TREES

Subtopic

Alnus

Alnus viridis

Alnus alnobetula subsp. fruticosa

Alnus alpina

Betula

Betula nana

Betula humilis

Juniperus communis

Picea obovata

Salix herbacea

LANDSCAPE FEATURES

Grasslands

Lakes

Bogs

Snowfields

Dominant rock

Base-rich rocks, made-up of, for example, phyllites or garnet schists, gen­erally harbour a distinct and species-rich, calcicolous vegetation (Fig. 2). In contrast, the more common, hard­weathered acid rocks, such as quartzites, syenites or hard schists, often give rise to a species-poor flora dominated by dwarf shrubs or graminoids with lower nutrient re­quirements.

Sedimentary rock

Phyllite

Quartzite

Permafrost

Pingo

Ice wedge

High and low center polygons

Frost boil

Thermokarst

GENERAL LOOK

SUMMER

Richardson Mountains

WINTER