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Month

February 2010

8 posts

Feb 26, 201026 notes
#bombyx #butterflies #old book illustrations #nattsvermere
Feb 23, 20102 notes
Feb 21, 201022 notes
#locvsta germanica #grass hopper #gresshoppe
Samarbeidsrådet for biologisk mangfold

SABIMA (Samarbeidsrådet for biologisk mangfold) er en paraplyorganisasjon for biologiske foreninger i Norge. SABIMA har ti medlemsforeninger med over 18500 medlemmer til sammen. Formålet er å bidra til bevaring av truede plante- og dyrearter og naturtyper i Norge.

Foreningene inneholder fagfolk i biologi og de fleste dyktige amatørbiologene i Norge.

SABIMA ble formelt stiftet i Oslo 7. mai 1996.

Tekst fra sabima.no

Feb 20, 2010
#sabima #biologi #natur
Feb 19, 2010
#pollen #macro #makro #Martin Oeggerli #National Geographic
Den nye naturmangfoldloven:

Naturmangfoldloven erstatter naturvernloven fra 1970. Den gamle loven omfatter bare vern av natur og har ikke et lovfestet krav om at truede og sårbare arter skal beskyttes mot skadelig aktivitet. Den nye naturmangfoldloven er langt mer vidtrekkende. Den omfatter naturen både innenfor og utenfor verneområdene og alle sektorer som forvalter eller påvirker natur. Nå er ikke fokuset bare vern, men også bærekraftig bruk.

Tekst fra wwf.no
Feb 18, 2010
#wwf #naturmangfoldloven #vern #bærekraftig bruk
Cordyceps Fungi

Text from neurophilosophy.wordpress.com

“…parasitic fungi of the genus Cordyceps (…) manipulate the behaviour of their host in order to increase their own chances of reproducing.

The spores of the fungus attach themselves to the external surface of the ant, where they germinate. They then enter the ant’s body through the tracheae (the tubes through which insects breathe), via holes in the exoskeleton called spiracles. Fine fungal filaments called mycelia then start to grow inside the ant’s body cavity, absorbing the host’s soft tissues but avoiding its vital organs.

When the fungus is ready to sporulate, the mycelia grow into the ant’s brain. The fungus then produces chemicals which act on the host’s brain and alter its perception of pheromones. This causes the ant to climb a plant and, upon reaching the top, to clamp its mandibles around a leaf or leaf stem, thus securing it firmly to what will be its final resting place.

The fungus then devours the ant’s brain, killing the host. The fruiting bodies of the fungus sprout from the ant’s head, through gaps in the joints of the exoskeleton. Once mature, the fruiting bodies burst, releasing clusters of capsules into the air. These in turn explode on their descent, spreading airborne spores over the surrounding area. These spores then infect other ants, completing the life cycle of the fungus.”

Feb 15, 20101 note
#cordyceps fungi #fungi
Feb 14, 2010
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