Utjecaj češkog dvornika Reynoutria x bohemica Chrtek et Chrtková na kemijske značajke tla i rast drugih svojti

master's thesis

• Title (english): Effect of Bohemian knotweed Reynoutria x bohemica Chrtek et Chrtková on chemical features of the soil and the growth of other species
• Author: Lucia Perković
• Mentor: Sven Jelaska (mentor)
• Committee member: Sven Jelaska (predsjednik povjerenstva)
• Committee member: Anamaria Štambuk (član povjerenstva)
• Committee member: Vlasta Ćosović (član povjerenstva)
• Committee member: Neven Bočić (član povjerenstva)
• Committee member: Ivana Maguire (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2019-03-11, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Smatra se da su invazivne vrste na globalnoj razini druga najveća prijetnja bioraznolikosti uz izravno uništavanje prirodnih staništa. Porodica Polygonaceae (dvornici) u Hrvatskoj flori broji sedam rodova od kojih je jedan i rod Reynoutria s tri svojte. Češki dvornik Reynoutria × bohemica Chrtek et Chrtková hibrid je dviju vrsta Reynoutria japonica Houtt. (japanski dvornik) i Reynoutira sachalinensis (F. S. Petrop.) Nakai in T. Mori (veliki dvornik) koji se spontano razvio na novom području izvan prirodnog areala roditeljskih vrsta. Češki dvornik, kao i ostale vrste roda Reynoutria, pokazuje izrazito puno invazivnih značajki te se smatra da se ovaj križanac širi brže i agresivnije od svojih roditelja. Ključ uspjeha ove vrste može se nalaziti u potencijalnom alelopatskom djelovanju koje dodatno pomaže daljnjem širenju i osvajanju novih područja. U ovom radu istraživan je utjecaj prisutnosti češkog dvornika na određene kemijske značajke tla (pH, organska tvar i humus) te rast i klijavost testnih biljaka Triticum aestivum L. i Sinapis alba L. Utvrđeno je kako prisutnost R. × bohemica nije značajno utjecala na promjene kemijskih značajki tla pa tako niti na rast i klijavost obične pšenice i bijele gorušice. Izgleda da je kompetitivna sposobnost ipak glavni mehanizam uspješnosti širenja ove vrste. Radi dobivanja što vjerodostojnijih rezultata potrebno je provesti istraživanja u uvjetima što bližima onima u prirodi.

Abstract (english)

Globally, in addition to direct destruction of natural habitats, invasive species are considered to be the biggest threat to biodiversity. The Polygonaceae family in Croatia consists of seven genera, one of which is Reynoutria, with three taxa. Reynoutria × bohemica Chrtek et Chrtková is a hybrid of two species, Reynoutria japonica Houtt. and Reynoutira sachalinensis (F. S. Petrop.) Nakai in T. Mori, which spontaneously developed in a new area, outside the areas of its parental species. Bohemian knotweed, like other species of the genus Reynoutria, displays a number of invasive characteristics and is considered to be expanding even more aggressively than its parental species. The key of its success could potentially lie in its allelopathic activity, which further aids its dispersion and conquest of new areas. In this thesis, I investigated the effect of the presence of Bohemian knotweed on different chemical features of the soil (pH, organic matter, humus) and on sprouting and growth of test plants Triticum aestivum L. and Sinapis alba L. It was determined that the presence of R. × bohemica did not significantly affect chemical characteristics of the soil or the growth and sprouting of Triticum aestivum L. and Sinapis alba L. Competition seems to be the main mechanism of invasive success of this species. To obtain reliable results in the future, the conditions under which the experiment is conducted need to be as close to those present in nature as possible.

• Keywords: invazivne vrste; hibrid; alelopatija; pH; organska tvar; humus; Triticum aestivum L.; Sinapis alba L
• Keywords (english): invasive species; hybrid; allelopathy; pH; organic matter; humus; Triticum aestivum L.; Sinapis alba L.
• Language: croatian
• URN:NBN: urn:nbn:hr:217:768610
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2020-03-11
• Created on: 2019-04-10 09:22:05