Woody biomass of invaded karstic pastures - a case study at Podgorski kras plain : graduation thesis - higher professional studies

Moraleda Melero, Carlos Manuel (author), Levanič, Tom (mentor), Vodnik, Dominik (comentor)

Raziskava je del projekta, ki preučuje ogljikov cikel na zaraščajočih kraških pašnikih v submediteranskem območju Slovenije na Podgorskem Krasu (JZ Slovenija). Analize smo opravili na dveh raziskovalnih ploskvah v različnih stadijih zaraščanja z gozdom (pašnik in z drevjem deloma zarasel pašnik). Cilj našega dela je bila ocena biomase lesnatih rastlin na zaraščajoči površini in primerjava s pašnikom. Delali smo v skladu z metodologijo kot jo predlaga Terrestrial Carbon Observation Panel (TCO), ki je del Global Terrestrial Observing System (GTOS) - http://www.fao.org/gtos. Na podlagi natančne inventure lesnatih rastlin smo s pomočjo alometrijskih funkcij izračunali biomaso lesnatih rastlin. Skupna biomasa lesnatih rastlin na zaraščajočem se pašniku je bila ocenjena na 32.065 t ha-1. Glavnina (86%) vse biomase odpade na puhasti hrast (Quercus pubescens L.). Z dendrokronološko študijo smo na vzorcu 18 dreves preučili tudi priraščanje biomase v času in prostoru. Ugotavljamo, da je v 52 letih gozd zasedel kar 21% suhega kraškega pašnika. Analiza volumenskega prirastka je še pokazala, da nobeno od analiziranih dreves še ni doseglo kulminacije volumenskega prirastka in da je to z vidika ponora ogljika zaželeno. Naša spoznanja so pomembna za razumevanjeprostorskih in časovnih sprememb v zalogah ogljika in o pomenu gozda za shranjevanje ogljika in blaženje klimatskih sprememb.

• Language: English
• Keywords: lesna biomasa, pašniki, Kras, zaraščanje, Slovenija
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [C. M. Moraleda Melero]
• Year: 2010
• Number of pages: VIII, 35 f.
• PID: 20.500.12556/RUL-15926
• UDC: 630*53(497.4 Kras)(043.2)=163.6
• COBISS.SI-ID: 3056294
• Publication date in RUL: 11.07.2014

Secondary language

• Language: Unknown

Abstract

Our research was part of a broader study that deals with the carbon cycling in abandoned karstic pastures of Slovenian sub-mediterranean region (Podgorski kras, SV). At this site two study plots that differ in succession (pasture andgrassland invaded by woody plants) are researched. The aim of our work wasto make estimation of woody plants biomass at invaded area. The method for the field measurements of biomass was one proposed by Terrestrial Carbon Observation panel (TCO) of, the Global Terrestrial Observing System programme (GTOS) (http://www.fao.org/gtos/). We did an inventory and we calculate total woody biomass for each species with different allometric equation. Total woody biomass of the site was estimated to 32,065 t , and was mainly contributed by pubescent oak (Quercus pubescens L., 86 % of total). We did also a dendrocronological measurement, we took samples from 14 trees with a increment borer and we also collected disks from 4 trees. In 52 years the forest overgrowth 21% of dry karstic pastures we can see that in ours samples trees, we observe a significant growth in these years analizing our samples trees. None of the trees in our case culminate and biomass production is in all trees in exponential increase that culmination is reached at very high ages so basically carbon storage is constantly increasing. The information on diameter increment and growth patterns of trees contributes to understand the changes in carbon stock during woody plant encroachment.