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Satakunta
nature at
its best
Welcome to Yyteri!
Cover photo: Yyteri sands. The sandbanks visible in the sea
move gradually towards the shore under the effect of the wa-
ves and finally end up blown by the wind as building material
for the dunes.
Photo: City of Pori Environmental Agency,
National Parks project/Lentokuva Vallas Oy 2012.
This brochure has been produced by the Pori Environmental
Agency as part of the Nature Services Development for the
Yyteri Peninsula project.
Idea and texts for the brochure:
Antti Mäkelä and
Kimmo Nuotio
Layout:
Idearäätäli Oy
Printing:
Ai-Ri Offset Ky
Year of publication:
2015
The Bar-tailed Godwit
(Limosa
lapponica)
is a familiar sight on the
Yyteri sandflats.
Yyteri represents Satakunta nature at its
best. The area is a concentration of beauti-
ful and unique natural sites. The City of Pori
Environmental Agency has constructed a na-
ture trail connecting these sites in its Nature
Services Development for the Yyteri Peninsu-
la project. The purpose of this brochure is to
inspire you to visit the Yyteri Peninsula and
help you identify the special natural features
along the trail.
Photo: Mika Linho
City of Pori
Environmental Agency
Nature Services
Development for the
Yyteri Peninsula
www.pori.fi/ymparisto
From Yyteri sands to the Bothnian Sea National Park
Munakari
sandbar
The Yyteri nature trail is located in the area between
the famous Yyteri beach and the Bothnian Sea Na-
tional Park. The trail along the seashore takes you
past dunes, the meadows and sandflats popular
with birdlife, reedbeds and coastal forests.
On the path that follows the border between shore
zone and forest, walkers can unwind or enjoy being
with their companions. If you want to, you can also
stop off at a viewing platform to watch for instance
the Marsh Harrier gliding over the reedbeds or the
striking-looking Common Shelduck resting near the
waterline. Personally, I particularly like the view from
the Sannannokka bird tower in the evening sunlight
and the chance to experience the peace in nature
that you find there.
Yyteri has many faces depending on the time and
weather. I would encourage as many people as pos-
sible to make the effort to find the unique nature and
scenery along the route. It is even worth making the
trip in inclement weather, because there is always
something to experience in the area. I can assure
you that the trail offers walkers interesting experi-
ences and a sense of wellbeing in any season. My
own favourite destination is the Munakari sandbar
where I love to follow how the movements of the sea
affect the formation of the bar. At the same time, I
can listen to the sounds of the sea.
Anne Savola
Environment specialist,
Regional Council of Satakunta
Photo: Mika Linho
4
5
Map:
City of Pori
Yyteri square
Beach
Yyteri
hiking/nature
trails
Yyteri sands
Munakari
Isosanta I
Isosanta II
Langoura
Hathuru
Mäntyniemi
Yyteri sandflats
Sannannokka
It is easy to get to
know the flora and fauna
of the Yyteri sandflats along
the wide duckboards.
Yyteri sandflats
Preiviikinlahti bay
Photo: Ilkka Valli / UAS-kuvaukset.
7
Borne by the wind
To form a beautiful line of dunes like at Yyteri, there
has to be a sufficient amount of sand and wind as
well as vegetation to bind the grains of sand. Over
the years a system of several types of dunes has
developed at Yyteri. Moving inland from the coast,
the vegetation covering the dunes increases and
diversifies.
The sand heaped on the beach by the waves is blown
and carried by the wind as it dries.
Embryo dunes
are
small dunes near the shoreline. They are generated
as the sand carried by the wind accumulates around
individual tufts of vegetation. Being buried in sand
forces the vegetation to grow, so it is able to bind
more grains of sand. This mechanism enables the
embryo dunes to gradually become bigger and even-
tually they form unbroken dune embankments par-
allel to the shoreline. The first growth of sea lyme
grass on the unbroken dune embankment does not
cover it fully; the white sand gleams through the veg-
8
etation. For this reason, these biotopes are known as
white dunes.
The next type of dune in the formation process is
known as the
grey dunes,
because mosses and li-
chens give the lower layer a grey hue. More and more
plant species are able to spread on the grey dunes
thanks to the protective effect of the dunes on the
seaward side. At Yyteri, the grass-covered dunes are
located behind the white dunes, creating an undulat-
ing terrain. As the vegetation binds the surface of the
dunes, tree species also start to colonise the dunes.
Forested dunes
are the last stage of the formation
process and are located behind the other dune types
further from the seashore.
Coastal dunes are vulnerable. Please
guarantee their preservation for the
future by using the gangways and
open natural shore platforms.
Embryo dune
White dune
Embryo dunes
White dunes
Grey dunes
Forested dunes
Grey dune
Forested dune
Photos: Antti Mäkelä
Locations of dune types at Yyteri
(according to Nylén 2009). Aerial Photo: City of Pori
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