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The Great Moss Lake / Velke mechove jezirko

A cache by M@x Send Message to Owner Message this owner
Hidden : 8/20/2008
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size: not chosen (not chosen)

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Geocache Description:


The GREAT MOSS LAKE
 


The great and the small moss lakes are lakes of peat in the National Natural Reserve Rejvíz that is located 720 to 770 metres above the sea level. The uniqueness of this place is given by its geological history and climate . The average yearly temperature is 5.6 °C. The summer is very short – only 15 days a year (the average day temperature over 15 °C). The winter lasts for about 4 months with average daily temperature under 0 °C. And as the whole area is very cold, it is also very rich of rainfall (yearly amount is 1400 mm while two thirds fall in the vegetation period). This makes it apparent that Rejvíz and its climatic conditions are not very different from areas in the most northern parts of our planet – the real tundra.

Rejvíz peat lakes are of the distribution moor type. They were created 6 to 7 thousand years ago thanks to the suitable configuration of terrain that provides enough of water retention on its impermeable bottom layer. The original spruce forrest had died because of the strong waterlooging and it was eventually replaced by the pitch pine woods that grow up to 15 meters with maximum age of 200 years. At the same time, there was another intensive growth of the moss and creation of peat. The lakes are also called blanks and their strongly watterlogged edges are called laggs.

The great moss lake can be found in the middle of west core of the peatery. The layer of the peat is 300 cm thick here. A small carnivorous plant called round-leaved sundew can be found here. And there are also many rare types of animals here. The recent researches found that the Rejvíz peatery belongs to one of the richest sanctuary of spiders. Northeast of the Great Moss Lake, there is the Small Moss Lake but that has been overgrown and is no longer accessible for public.

To help the public learn about this location, the Management of CHKO Jeseníky (Protected natural area) opened a new nature trail leading in the middle of the reserve. The trail is 2.2 km long and has 5 stops with graphic and texts on the main phenomena of the locality.

Let’s go together for a walk by the Great Moss lake…

To log the cache, you must fulfill the following conditions:

1. Add your picture with your GPS taken at N 50°13.297 E17°17.103
(spoiler1)
2. Add your picture with your GPS taken at the starting coordinates (
spoiler2)
3. Send me ( geo.max@seznam.cz )
the answer to question: Which unique animals and plants can be found in this area? (The answer can be found on pictures at the information board near spoiler2).
4. Send me ( geo.max@seznam.cz ) the information about structure of this local moorland (The answer can be found on pictures at the information board near spoiler2).
5. Send me ( geo.max@seznam.cz )
the information about the full amount of mass material there... (expect in m3)

The logs which will not comply with the requirements will be deleted.
 

Thanks to my geofriend H+ for the English translation.

**********************************************************

VELKE MECHOVE JEZIRKO


Velke a male mechove jezirko jsou raselinna jezirka v Narodni prirodni rezervci Rejviz,
ktera je rozlozena v nadmorske vysce 720 az 770 m . Unikatnost prirody teto rezervace je podminena geologickou minulosti a klimatem. Prumerna rocni teplota je 5,6 °C. Leto je velmi kratke - pouhych 15 dnu (prumerna denni teplota nad 15 °C). Zima trva plne ctyri mesice s prumernou denni teplotou nizsi nez 0 °C. A jak je cele uzemi chladne, tak je soucasne bohate na srazky (rocni uhrn 1400 mm, pricemz 2/3 mnozstvi spadnou v obdobi vegetace). Z uvedeneho je patrne, ze Rejviz se svymi klimatickymi podminkami nijak nelisi od mist rozprostirajicich se v severnejsich zemepisnych sirkach - v oblastech pravych tunder.

Rejvizske raseliniste patri k typu rozvodnicoveho vrchoviste. Vzniklo pred 6 - 7 tisici lety diky vhodne konfiguraci terenu, ktery umoznuje dostatecne nadrzovani vody na nepropustnem podlozi, cimz byly dany zakladni podminky pro vznik raseliniste. Puvodni smrkovy les vlivem silneho zamokreni odumrel a byl postupne nahrazen porosty borovice blatky. ktera dorusta do vysky 15 m pri stari maximalne do 200 let. Soucasne doslo v dalsim vyvoji k intenzivnimu rustu raseliniku a tvorbe raseliny. Raselinna jezirka se nazyvaji blanky a jejich silne zamokrele okraje - lagg.

Velke mechove jezirko se nachazi ve stredu zapadniho jadra raseliniste. Vrstva raseliny zde dosahuje vysky 300 cm. Vyskytuje se zde drobna masozrava rosnatka okrouhlolista. Krome rostlin zde maji utociste i vzacne druhy zivocichu. Az vyzkumy z posledni doby prokazaly, ze rejvizske raseliniste patri mezi nejbohatsi ve vyskytu neprilis oblibene skupiny zivocichu - pavouku. Severovychodne od Velkeho jezirka lezi Male mechove jezirko, ktere jiz dnes zcela zarostlo a je verejnosti nepristupne.

Pro seznameni s touto lokalitou a pouceni verejnosti byla v roce 1970 Spravou CHKO Jeseniky otevrena naucna stezka do stredu rezervace. Na trase 2,2 km je 5 zastaveni s nazornymi texty o hlavnich fenomenech lokality.

Vydejme se tedy spolecne na prochazku k Velkemu mechovemu jezirku…

Pro zalogovani cache musite splnit tyto podminky:
1. Pripojte k logu fotografii Vas s GPS z mista
N 50°13.297 E17°17.103 (spoiler1).
2. Pripojte k logu fotografii Vas s GPS z mista uvodnich souradnic (
spoiler2).
3. Poslete mi na email geo.max@seznam.cz
odpoved na otazku: Ktera unikatni zvirata a rostliny muzete najit v teto oblasti? (Odpoved je k nalezeni na obrazcich na informacni tabuli pobliz spoiler2)
4. Poslete mi na email geo.max@seznam.cz
popis struktury zdejšího rašelinište (Odpoved je vyobrazena na informacni tabuli pobliz spoiler2).
5. Poslete mi na email geo.max@seznam.cz
odhadovadovany objem hmoty (humulitu) v raselinisti v m3 (Neuvadejte celkovy objem jezirka).



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