Flora and fauna of the Shannon
The
Shannon provides many different habitats for a wide variety of species of
flora including some rare and very interesting plants. Some, which can be
found in this area, include various types of algae, reeds and grasses. The
Shannon offers a good cross-section of the fauna of Ireland. There are
brown hares, foxes, mink and frogs etc. As regards insects, there are
butterflies, dragonflies, beetles and in the Shannon; mussels, snails and
leeches. Many different varieties of birds live on the Shannon such as
swans (Berwicks, Mute and Whooper), moorhens, swallows, terns, ducks and
the midlands are especially noted for corncrakes
.
Flora and fauna of the callowland
The hay meadows of
the callows are made up of grasses and sedges, meadowsweet, ragged robin,
meadow bedstraw, the rare marsh pea, purple lousewort and the common
buttercup. In drier parts purple moor grass forms dense tussocks. The
callows are an important habitat for birds in summer and winter: in summer
skylarks, meadow pipits and the now rare corncrake
live; in winter, when the river floods and increases
in breath tenfold, the area is teeming with ducks,gulls, waders, swan and
geese. Most numerous are the widgeons, lapwing, blackhead gull, golden
plover, blacktailed gotwit and curlew.
Flora of the bogland
Ecology of bogs is very different.
Fungi and bacteria, which normally breakdown dead plants in the presence
of oxygen, cannot live here die to the deficiency of oxygen and the acidic
environment. Dead plants are not recycled in bogs and the flora here is
mainly evergreen. Three plants have adapted particularly well to this harsh
environment; heathers, sphagnums mosses and sundews ( insectivorous plants).
Heathers form an alliance with fungi in order to survive. Heather manufacture
carbohydrates and shares it with the fungi which cannot do this. In return
fungi assist the heather by obtaining essential nutrients. Also, heather
has small densely packed leaves along the branches to protect against water
loss. Sphagnum mosses are the main building blocks of raised bogs. They
get their nutrients exclusively from rainwater and wind. They can absorb
and retain up to 20 times their own weight of water. Sphagnum mosses produce
complex acids and these exchange hydrogen ions for calcium, magnesium etc.,
which are important in a mineral deficient habitat and are taken up by
the plant to provide it with nutrients. Sundews adapt to the bog environment
by trapping and digesting insects to obtain essential nutrients which are
lacking in the waterlogged soil. Other flora includes bog cotton, cranberry,
bog orchid and bog rosemary.
Bog fauna
There are numerous types of animals,
insects and birds living on bogs such as craneflys, frogs, hares, curlews,
snipe, skylark and emperor moths. Many have adapted well to this environment,
for example the Red Grouse, who nests on the ground due to absence of trees,
has plumage which blends with bog vegetation. While diving beetles and
water spiders trap air bubbles on the surface of the bog pool beneath the
abdomen. They use this air to breathe under water when hunting for prey.
The pond skater has adapted by moving quickly over the bog pool surface
to catch pray, their legs are spread widely apart and the weight of the
insect is thus evenly distributed which facilitates fast movement on the
surface of the water.



