61. Temporal and spatial variability of phloem structure in Picea abies and Fagus sylvatica and its link to climateJožica Gričar, Jernej Jevšenak, Kyriaki Giagli, Klemen Eler, Dimitrios Tsalagkas, Vladimir Gryc, Hanuš Vavrčík, Katarina Čufar, Peter Prislan, 2024, original scientific article Abstract: Using a unique 8-year data set (2010–2017) of phloem data, we studied the effect of temperature and precipitation on the phloem anatomy (conduit area, widths of ring, early and late phloem) and xylem-ring width in two coexisting temperate tree species, Picea abies and Fagus sylvatica, from three contrasting European temperate forest sites. Histometric analyses were performed on microcores taken from tree stems in autumn. We found high interannual variability and sensitivity of phloem anatomy and xylem-ring widths to precipitation and temperature; however, the responses were species- and site-specific. The contrasting response of xylem and phloem-ring widths of the same tree species to weather conditions was found at the two Slovenian sites generally well supplied with precipitation, while at the driest Czech site, the influence of weather factors on xylem and phloem ring widths was synchronised. Since widths of mean annual xylem and phloem increments were narrowest at the Czech site, this site is suggested to be most restrictive for the radial growth of both species. By influencing the seasonal patterns of xylem and phloem development, water availability appears to be the most important determinant of tissue- and species-specific responses to local weather conditions.
Keywords: wood anatomy, early phloem, European beech, late phloem, Norway spruce, sieve element area, xylem-ring width
Published in DiRROS: 19.01.2024; Views: 201; Downloads: 88
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62. Efficacy of trapping protocols for Agrilus jewel beetles : a multi-country assessmentGiacomo Santoiemma, David Williams, Everett G. Booth, Giacomo Cavaletto, James Connell, Gianfranco Curletti, Maarten De Groot, Sarah M. Devine, Abigail Enston, Joseph A. Francese, Eva Groznik, Tine Hauptman, 2024, original scientific article Abstract: The genus Agrilus is one of the most diverse insect genera worldwide. The larval feeding activity causes extensive damage in both forests and orchards. In addition, more than 30 species have been introduced outside their native range so far, including the emerald ash borer Agrilus planipennis Fairmaire. Thus, the availability of efficient trapping protocols for early detection of Agrilus species at entry points is of utmost importance. In this study we tested whether trapping protocols developed for surveillance of A. planipennis in North America were also effective for other Agrilus species. In particular, through a multi-country assessment we compared the efficacy of detecting Agrilus species on: (i) green glue-coated prism traps vs. green Fluon-coated multi-funnel traps when baited with the green leaf volatile (Z)-3-hexenol or left unbaited; and (ii) green multi-panel traps vs. green multi-panel traps baited with dead adult Agrilus beetles (decoys). A total of 23,481 individuals from 45 Agrilus species were caught. Trap design significantly affected both species richness and abundance of Agrilus species in several of the countries where the trapping experiments were carried out, and green prism traps outperformed green multi-funnel traps in most cases. On the contrary, the addition of a (Z)-3-hexenol lure or dead adult beetle decoys on to traps did not improve trap catches. Our study highlights that reliable trap models to survey Agrilus species are already available, but also that there is the clear need to further investigate chemical ecology of Agrilus species to develop semiochemical lures that can improve detection efficacy.
Keywords: biosecurity, early detection, forest pests, lures, traps, visual stimuli, Agrilus, beetles
Published in DiRROS: 19.01.2024; Views: 173; Downloads: 109
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65. 5. poročilo o doseganju kazalnikov uspešnosti in napredka partnerjev projekta Life IP CARE4CLIMATE - akcija C8 in E3Boštjan Mali, Andreja Ferreira, Gal Kušar, Anica Simčič, Bernarda Krištof, 2022, treatise, preliminary study, study Keywords: projekt Life IP CARE4CLIMATE, raba tal, spremembe rabe tal, gozdarstvo, aktivnosti
Published in DiRROS: 16.01.2024; Views: 196; Downloads: 0 |
66. 4. poročilo o doseganju kazalnikov uspešnosti in napredka partnerjev projekta Life IP CARE4CLIMATE - akcija C8 in E3Boštjan Mali, Andreja Ferreira, Gal Kušar, Anica Simčič, Adrijana Trekman, 2022, treatise, preliminary study, study Keywords: projekt Life IP CARE4CLIMATE, raba tal, spremembe rabe tal, gozdarstvo, aktivnosti
Published in DiRROS: 16.01.2024; Views: 194; Downloads: 0 |
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