13.07.2015 Views

Daugavpils Universitātes 55.Starptautiskās ... - DU conference

Daugavpils Universitātes 55.Starptautiskās ... - DU conference

Daugavpils Universitātes 55.Starptautiskās ... - DU conference

SHOW MORE
SHOW LESS
  • No tags were found...

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Pētījums tika veikts dabas liegumā „Raėupes ieleja”, dabas liegumā „Embūte”, dabas liegumā„Eglone”, dabas parkā „Dvietes paliene”, dabas parkā „ZiemeĜgauja”.Kopumā tika ievākti paraugi no 18 ozoliem(Quercus robur), ir konstatēta 31 epifītisko ėērpju suga. Ardatu analīzes programmu PC-ORD tika apkopoti rezultāti, kuri parāda ėērpju sugu atkarību noapkārtējās vides apstākĜiem (noēnojums, apsaimniekošana, attālums no jūras, nokrišėu daudzums)AĜona Fjodorova<strong>Daugavpils</strong> Universitāte, Vienības iela 13, <strong>Daugavpils</strong>, Latvija, Alja.28@inbox.lvDABAS LIEGUMA "TĪRĀS SŪNAS PURVS" FLORAS IZPĒTE„Tīrās sūnas purvs” ir dabas liegums, kas ietilpst NATURA 2000 aizsargājamo teritoriju sarakstā. Tasatrodas <strong>Daugavpils</strong> novda, MaĜinovas pagastā. Kopējā mikrolieguma platība sastāda 36 hektārus. Visāplatībā ir sastopams Eiropas Savienības aizsargājamais biotops - Pārējas purvi un slīkšĦas (7140). Šīmbiotopam ir raksturīga savdabīga mikroreljefa struktūra un veăetācija. Mazāku platību ieĦem EiropasSavienības aizsargājamie biotopi: 9010 (Veci vai dabiski boreālie meži); 9080 (Staignāju meži) 91D0*(Purvaini meži). Kopš teritorijas izveidošanas 1977. gadā pētījumi par lieguma floru nav veikti.Pētījums veikts laika posmā no 2012. gada maija līdz. 2012. gada septembrim. Pētījuma gaitā veikta„Tīrās sūnas purva” dabas lieguma floras inventarizācija.Tika konstatētas 62 augu sugas no kurām 1. suga ir iekĜauta Latvijas Sarkanajā grāmatā 2.kategorijā(Salix myrtilloides).Armine Abrahamyan 1 , Arvids Barsevskis 2 , Andreas Melikyan 31 <strong>Daugavpils</strong> University, Vienibas street 13, <strong>Daugavpils</strong>, Latvia, arm_abrahamyan@yahoo.com2 <strong>Daugavpils</strong> University, Vienibas street 13, <strong>Daugavpils</strong>, Latvia, arvids.barsevskis@du.lv3 Plant Cultivation and Vegetable-growing Department, Armenian National Agrarian University, Yerevan,ArmeniaIMPACT OF CLIMATE CHANGE AND HABITAT LOSS ONWILD ORIGANUM VULGARE L. (LAMIACEAE) POPULATIONSEXTINCTION IN THE REPUBLIC OF ARMENIAThe small mountainous country of Armenia has a rich flora of ca. 3600 species of vascular plants,which makes about half of entire Caucasian flora, with both Caucasian and Iranian elements,distributed across desert and semi-desert, steppe, forest and alpine landscapes.As one of the firstcountries to join the Convention on Biological Diversity (CBD), Armenia has a strong interest inexamining the biodiversity of native plant species, particularly those with potential or existingeconomic value (e.g. medicinal plants), and assessing their conservation status.During recent years the use of biological resources in Armenia has become unsustainable, as a resultof increasing human pressures linked to economic collapse. As a result, certain habitat types havebeen significantly degraded (including forests, mountain pastures and wetlands), and a number ofspecies face with extinction. The key threatening processes for the biodiversity in the country include:habitat loss and fragmentation, environment deterioration and climatic changes, decline of naturalpastures and grasslands due to intensive over-use, exploitation of useful plant populations, untimelyand unsustainable harvesting of wild edible and medicinal plants, which significantly affects theirnatural regeneration.Climate change is not only represents a significant additional threat to plants biodiversity; it alsorequires a substantially increased use of wild edible plants to maintain resilience and adaptability inagro-ecosystems. This research work covers five consecutive years from 2007 to 2012. During firstthree years, field studies and eco -geographic surveys in respect with Maxted et al. (1995)methodology were conducted to identified and assess habitat loss impact on Origanum vulgare L.(oregano, Lamiaceae) populations extinction rate in the country over the past decades. Also, it has~ 6 ~

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!