KRESNIČKE: KAM SO IZGINILE?

 KRESNIČKE: KAM SO IZGINILE?
Deli:

Kresničke lahko kaj kmalu za vedno izginejo in s sabo vzamejo čarobne lučke, ki so osvetljevale vsak poletni večer. Zakaj je temu tako?

Znanstveniki zaenkrat še nimajo konkretnega odgovora na vprašanje zakaj kresničke izginjajo. Omenjajo pa predvsem dva glavna škodljivca kresničkam: svetlobno onesnaževanje in razvoj mest. Kresničke se zadržujejo predvsem v vlažnih predelih – v gozdovih, pri mlakah,.. in s krčenjem njihovega naravnega habitata, krčimo njihov dom. Vode so vedno bolj onesnažene ali uporabljene za glasen promet, gozdnih površin je vedno manj, uporaba pesticidov na njivah je pa vedno večja in tako tudi to vpliva na (ne)obstanek kresničk.

Nekateri znanstveniki pravijo, da na izginjanje kresničk vpliva tudi človeška prisotnost. Ponekod so za ljudi organizirali oglede kresničk in po nekaj letih so te iz tega določenega območja izginile – najverjetneje zaradi človeških motenj.

Kresničke so še vedno zelo skrivnostna bitjeca – znanstveniki o njih še danes ne vedo prav veliko, vendar verjamejo, da prav svetlobno onesnaževanje najbolj vpliva na izginotje teh svetlečih hroščev.

Ste vedeli zakaj kresničke svetijo s svojimi zadnjicami? Tako med seboj komunicirajo. Noči so, zaradi vedno močnejše umetne osvetljave, svetlejše in tako jih svetloba moti pri medsebojni komunikaciji. Znanstveniki so ugotovili, da ko kresničke zmoti svetloba avtomobilskih luči postanejo nekoliko bolj nemirne in za nekaj minut med seboj več ne komunicirajo s svojimi svetlobnimi signali.

Kresničke so zares fascinantna bitja, ki jih povezujemo z otroštvom in poletjem. Si lahko predstavljate, da čez naslednji dve generaciji otroci ne bodo več poznali kresničk?

Veste, da lahko naravi pomagate tudi od doma? Kako, si preberite tukaj.

Povzeto po:

Firefly

Deli:

Marelica

27 Comments

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