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Year 2001 - White Stork Project
Schools from three Countries together
in Europe At School 2001 competition
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Published by School M.A.R, Croatia, I.E.S.J-Sera, Spain
and G.S.G Moisil, Romania.
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EkoMAR zine > art#001063
26.03.2001
Bubbling species in natural biotopes
BUBBLING SPECIES IN NATURAL BIOTYPES
THE DANUBE DELTA,LITTLE ISLE OF BRAILA
The framing of the bubbling species in different biotypes from the delta was made in concordance with the places where they put their nests and they reproduce.If a species is presented in two or many biotypes, the decisive framing is the relative density of its populations.Considering that te places for nestling tells very correctly the biotype of the specie and the bundle with all the ecological conditions, we framed the bubbling species in biotypes after this criteria, because these biotypes coresponde with the period for the reproducing of the birds.
Although,it was showen for each species the category that takes part, taking in the view the use of one or more biotypes, or from the same habitate, or from different habitates.
The perfect conditions of multiplication and forage modified more or less the habits from the place or the nest installing made or the forage system of some populations from the neighbourhood comparing to the populations from the rest of their area.For that, some birds may appear written in the acquatic field.
BIOTYPE IX: The birds of the antropic biotype are:
-WHITE STORK(Ciconia ciconia)
-DOVE(Streptopelia decaocto)
-COMMON OWL(Athene noctua)
-COLOURFUL WOOD-PECKER FROM THE GARDEN(Dendrocopos syriacus)
-LITTLE DREPNEA(Apus apus)
-THE BIRD FROM HOME(Delichon urbica)
-COMMON SWALLOW(Hirundo rustica)
-SPARROW FROM HOME(Passer domesticus)
The places for nestless of the antropofile birds are the houses from towns or different buildings.The nestless from different buildings are in discovered places(WHITE STORK, THE BIRD FROM HOME, COMMON SWALLOW) or covered(COMMON OWL, LITTLE DREPNEA, SPARROW FROM HOME).
The food is from water(WHITE STORK), mixed (LITTLE DREPNEA, THE BIRD FROM HOME, COMMON SWALLOW, SPARROW FROM HOME) and land (DOVE, COMMON OWL, COLOURFUL WOOD-PECKER FROM GARDEN), being, natural, from animals, without DOVE and SPARROW FROM HOME which have vegetable food.
The migratory birds from the Danube Delta include a number of 132 species, about the half from the total of avifauna from Delta.They are formed from the species which come here only in summer for nesting, and in winter they go back.They are: Big birds(Podiceps cristatus), The bird with red neck(Podiceps griseigena), The bird with black neck(Podiceps nigricollis), Little bird( Podiceps ruficollis), Big cormorant(Thalacrocorax corbo), Common pelican(Pelecanus onocrotalus), Big stork(Egretta alba), Whie stork(Ciconia ciconia).
The migratory species represent 75% from the total of avifauna from delta. Studying the movie of these birds between spring and autumn,we notice that almost belong to this region.The migratory birds present different characteristic talking about the movie between seasons.
We have two situations:
1) when we study the populations which had the nestle in delta
2) when we study the populations which don’t live in delta, but they can appear in delta.
In the first case we have the following situations:White stork, Little stork.
Like geographical position the migratory species from the delta belong to the following types: European-65 species(49,23%), Mediteranean-21 species(15,91%), Mongol-22 species (16,67%), Syberian-2 species (1,52%), Chinese-1 specie (0,76%),Transpalearcticeles have 21 species (15,91%).
From the point of view of the composition, the migratory birds from the delta belong to the following type:Ciconiiformes( 11 species).
Electronic zine EkoMAR, you are reading now, is produced in
online cooperation of school teams from three countries
joined together for Europe At School 2001 competition.
Zine is prepared and published with online automated
tools by members of school teams.
Internet and e-z Composer software, newest technologies used here,
are only media and tools, but real gold here is joining
of tens authors of articles spread in three countries and
values of their original works.
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