Abundance - rarity
Vr.R.Bejsak-Colloredo-Mansfeld
ricardo at LOGIN.CZ
Fri Aug 1 10:33:16 CDT 1997
Please for comment for following still unpublished paper...
THE CLASSIFICATION OF INCIDENCE for Fauna and flora, especially insects.
author : Vratislav Richard Bej=9A=E2k
Abstract
The papers give you classification for abundance of fauna and flora more =
accurate than present system. The Rare, common... etc is properly classif=
ed into 2 different type of classification and finally proposed new joine=
d type.
Introduction
The present time is very important for ecologist and environmentalist to =
claim how the fauna and flora is spread. What is rare, engaged or common =
specie.There is no any problems with higher flora and fauna as a orchids,=
mammals, birds etc. but the other parts as an insects are very badly =
or not at all with this type of classification.
The invertebrates are a most important part of fauna. They provide a sou=
rce of food for other animals, but some of them are also listed as endang=
ered, vulnerable or rare species. Insects in particular play an importan=
t role in the economy of nature, and hence they are a very important ecol=
ogical component.
For example, New Scientist No.1655 stated: Insects play an especially =
important role in the river's food chains because, in terms of energy tra=
nsfer, they help bridge the gap between those forms of primary production=
which would be indigestible or inaccessible to fishes and those which =
, through the insects' feeding activities (or the insects themselves), =
become available to the fishes. Furthermore, many of the insects consume=
d by fishes are arboreal or terrestrial species which fall into the water=
or are flushed into it during floods (or rains).
System Kult
This is the system developed by czech carabidolog for his Key : The Carab=
idae from Czechoslovakia, 1947)
Kult in his table of Abundance categorise each species to the group 1-8.=
The Gorups was settlet how many xpecimens he have seen during his10 yea=
rs period where he revised round 120 collections and many years of anoth=
er frequent identification for other 98 collectors.
Group
1 I have seen 1 - 3 exeplars (specimens) solitary, sporadic
2 I have seen 4 - 10 exeplars (specimens) very rare
3 I have seen 11-50 exeplars (specimens) rare
4 I have seen 50-100 exeplars (specimens) not abundant, plentiful
5 I have seen 100-200 exeplars (specimens) abundant, plentiful
6 I have seen 200-500 exeplars (specimens) very abundant, plentiful
7 I have seen 500-1000 exeplars (specimens) common
8 I have seen more than 1000 exeplars (specimens) very common
System Nohel - Bejsak
The whole area of occurrence of a given species totally =
covers the territory of a given country (for example Victo=
ria, Montana, central New South Wales). In the country, the species=
occur in all or nearly all geographic areas and is being =
found in a wide spectrum of various biotopes. On biotopes=
, it is usually found in great abundance. To this group =
there belong species usually recorded as =93widespread =
and very common=94. The group is arbitraly design=
ed as a group .........................................................=
....................... F
The whole area of occurrence of a given species totally =
covers the territory of a given country. Nonetheless, in the =
country, the species does not occur in all orographic areas =
being confined to only some of them. it inhabits also fewer =
types of biotopes than species belonging to group =935=94, =
usually preferring only one or few types of habitats. Here =
it is moderately abundant, only there belong species =
usually recorded as =93widespread but infrequent=94. The gro=
up is arbitraly designed as group .................................=
..... E
The whole area of occurrence of a given specie totally =
covers the territory of a given country .Nonetheless, the =
incidence of the spe cies is recorded from only very few =
places, well dispersed from the another, being mostly of =
a relic character. Species placed here in general occur =
on habitants with great natural riches, well preserved, bei=
ng little or not affected by human activity. on habitat, =
the species is never present in great quantities, oftent=
imes being only incidentally taken. To this group there =
belong species usually re corded as =93very sporadic, very =
rare=94. The group is arbitraly designed as group ...........=
.........................................................................=
. D
The area of distribution of a given species cover only a minor=
part of a country, the border of the area of distribution =
just passed through the territory of the country. The species=
occur thus only in one or at most few orographic areas, and =
its incidence is strictly confined to them, so that there =
is a complete lack, of the species in other parts of the =
country. Nonetheless, in those orographic areas where =
the species still occur, it inhabits usually more than =
one types the species still occurs, it inhabits usually =
more than one types of habits and it may be fairly abund=
ant on them. To this group there belong species usually =
recorded as being =93very local but at the place where it =
occurs often found abundantly=94. The group is arbitraly =
de signed as a group ..................................................=
............................................. C
The border of the area of distribution of a given species jus=
t reaches the territory of a given country. The species occur =
thus only in one orographic area its incidence is strictly =
confined to it so that there is a complete lack of the spe=
cies in other parts of the country, even in the neighboring =
orographic areas, if they are different. If they species =
does occur in more orographic areas than in the one, then =
the areas are very similar to the one another and are clo=
sely adjoining. the species is bound to such types of habitats =
as are those named in group =933=94 (see there), and is =
found here only incidentally. Species usually reported to =
be =93very local and very rare=94 may, in a part, belong =
to this group, which is arbitrarily designed =
as group ............................................................=
........................................................... B
To this last group there belong species being hitherto =
only poorly known so that it is impossible to make reliable =
conclusion as regard to their area of distribution. To this =
group there belong mainly very recently described species =
or species, that have until recently been recognized as =
synonyms or lower taxons (abberations,etc.).
This group is arbitrarily designed as group .............................=
................................. A
Some species are mostly occur in smaller or bigger =93col=
onies=94 (for example as a Scolytidae, some species =
of Buprestidae, Scarabaeidae, etc.).The group is arbitrarily supply=
with letter ........................................................ g
Some species are occur only as a isolated individuals, maximal=
ly as a couple, the group is arbitrarily supply with letter .........=
............................................ I
I would suggest getting a copy of Kenneth Dodd's paper on what is common=
? I
think it was in either Conservation Biology or Herp Review. I'll try to =
find
my copy and give you a specific citation later.
Found the Dodd paper. It's "The Need for Status Information On Common
Herpetofauna Species." Herpetolgical Review 24(2) 1993.
Keep care and be of good cheer
Regards
Vratislav Richard Eugene Maria John Baptiste
of Bejsak (Bayshark)-Collorado-Mansfeld
Coleoptera - Australia, Tenebrionidae of World
Konevova 1658/110
130 00 Prague 3 Zizkov
CZECH Rep.
ph.: (420+2) 69 7272 7 (home)
e-mail: ricardo at login.cz
(before Ricardo at compuserve.com)
Only after the last tree has been cut down,
only after the last river has been poisoned,
only after the last fish has been caught,
only then will you find that money can not be eaten.'
CREE INDIAN PROPHECY.
More information about the Taxacom
mailing list