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In this paper, we report two new locations of the alien invasive seed beetle Megabruchidius dorsalis in Zagreb, Croatia. Additionally, we confirm for the second time the presence of M. dorsalis at one location in the same city. All beetles were reared from mature Gleditsia triacanthos pods collected from the ground (three locations) and from trees (one location). These records contribute to the knowledge of the distribution of M. dorsalis in Europe.

Fourteen local tree-ring chronologies of beech (Fagus sylvatica L.) from different sites in Slovenia, elevations 300-1,415 m a.s.l., were constructed. Basic statistics of the chronologies (raw, standard and residual), climatic influence on tree growth, and growth variability among the sites are presented in the article. Dendroclimatological analysis showed that summer (particularly June) temperatures have negative and precipitation positive effect on tree-ring widths of beech on eleven sites in central, SE and SW Slovenia. The beech from highly elevated site in the Julian Alps above Tolmin (elevation 1200-1,450 m) showed positive response to summer temperatures. The whole variability in studied beech chronologies can be resumed in three sources of variation (principal components - PC): (PC_1) response of trees to June climate, (PC_2) altitude, and (PC_3) biogeographical differences.

Populacije pribe v Evropi so zaradi slabega gnezditvenega uspeha v zadnjih desetletjih doživele velik upad številčnosti. Da bi ugotovili velikost in dinamiko populacije pribe na Dravskem in Ptujskem polju ter pojasnili rabo habitatov smo med leti 2016 in 2018 izvedli raziskavo. Na štirih manjših območjih smo pozimi popisali vegetacijo njivskih površin z namenom analize učinka ukrepa ozelenitve za varstvo pribe. V letih 2016, 2017 in 2018 smo popisali 148, 130 in 117 parov prib in izračunali zmeren upad populacije. Večino osebkov smo popisali na golih njivah in njivah z mladim pridelkom, kar je bilo pričakovano, saj pribe preferirajo habitate z nizko vegetacijo ali brez, kjer imajo nemoten pregled nad okolico. Z analizo podatkov o kulturnih rastlinah smo ugotovili preferenco do območij s koruznimi njivami, ki so v času gnezdenja pretežno gole površine. Na podlagi zimskih popisov ozelenitve njiv za ugotovitev učinka ukrepa ozelenitve za varstvo pribe sklepamo, da pribam zelo verjetno ustreza mozaik golih površin za gnezdenje in ozelenjenih površin za prehranjevanje in vzrejo mladičev. Na Dravsko-Ptujskem polju gnezdi med 12 in 21 % nacionalne populacije, kar ga uvršča med eno izmed najpomembnejših območij za pribo v Sloveniji. Za varstvo pribe v okviru kmetijsko-okoljskih-podnebnih plačil predlagamo časovno omejitev kmetijskih operacij v kombinaciji z vzpostavitvijo primernih prehranjevalnih habitatov. Za maksimalno učinkovito varstvo predlagamo prioritetno izvajanje ukrepa na tradicionalnih gnezditvenih območjih. Northern Lapwing numbers across Europe are declining because of insufficient breeding success. To determine the size, dynamics and habitat use of Lapwing population on Dravsko and Ptujsko polje a survey was carried out between 2016 and 2018. Four sites were selected to record winter greening to analyse the potential effect of greening measure for protection of Lapwing. In 2016, 2017 and 2018 we recorded 148, 130 and 2017 pairs, respectively and calculated moderate population decline. The majority of Lapwings was found on bare tilled land and fields with spring crops which provide unbroken all-round views. Crop data analysis showed significant preference for maize fields which are mostly bare tillage during the incubation period. According to winter greening records it is very likely that mosaic of bare tilled fields for nesting and greened fields for foraging and chick rearing is the most suitable breeding habitat. Approximately 12 to 21 % of the national Lapwing population was recorded on Dravsko-Ptujsko polje thus being one of the most important breeding area in Slovenia. For the protection of the Lapwing we recommend a time limit for farming operations in combination with providing suitable foraging habitats within the Agri-environment scheme. For greater effectiveness, we propose priority implementation of conservation measures on traditional breeding sites.

In this survey we summarize results regarding the Kauffman bracket, HOMFLYPT, Kauffman 2-variable and Dubrovnik skein modules, and the Alexander polynomial of links in lens spaces, which we represent as mixed link diagrams. These invariants generalize the corresponding knot polynomials in the classical case. We compare the invariants by means of the ability to distinguish between some difficult cases of knots with certain symmetries.

Sardela (Sardina pilchardus) in sardon (Engraulis encrasicolus) sta ekološko in gospodarsko pomembnejši vrsti rib, saj ohranjata ravnovesje med trofičnimi nivoji v severnem in srednjem Jadranu in predstavljata pomemben gospodarski vir vseh obmorskih držav Jadrana. Zaradi izkoriščenosti sardele in delne izkoriščenosti sardona v Jadranu smo s podporo projekta AdriaMed in ZZRS zagotovili potrebne podatke za prihodnje raziskave, ki bodo omogočale podajanje ocen o biomasi drstitvenega staleža sardele in sardona na preučevanem območju. Na območju slovenskega morja smo na desetih vzorčnih postajah, med seboj oddaljenimi približno 5,56 km, vzorčili enkrat mesečno enajst mesecev (avgust 2014–september 2014, november 2014–julij 2015). Vzorčili smo po metodi DEPM (Daily egg production method) z WP2 mrežo. Vzorce smo shranili v 3 % formaldehidu. Sardela se je tekom raziskave drstila med septembrom in aprilom, z viškoma v novembru in februarju. Število iker je bilo nizko, z izjemo novembra, saj območje za drst sardele zaradi nizkih temperatur ni najprimernejše. Najvišje število iker smo ujeli v severozahodnem delu slovenskega morja in Koprskem zalivu. Ikre sardona so bile prisotne od avgusta do novembra 2014 in od maja do julija 2015, z najvišjim številom v avgustu v severozahodnem delu slovenskega morja in Koprskem zalivu. Ikre smo izmerili in jim določili starost. Sardine (Sardina pilchardus) and anchovy (Engraulis encrasicolus) have an important ecological role in Adriatic ecosystem (on trophic levels) and are commercially most important coastal pelagic species of countries around Adriatic. In the Adriatic Sea sardine is depleted and abundance of anchovy stocks are low, so with the support of AdriaMed project and ZZRS we set our goals to recognize the most important sardine and anchovy spawning areas and periods in Slovenian sea for future spawning stock biomass estimations. Sampling was performed in the Slovenian sea once a month for 11 months (from August–September 2014 and November 2014–July 2015) at 10 sampling stations, positioned app. 3 miles apart. As suggested by the DEPM protocol, the sampling was conducted using WP2 net. Samples were preserved in 3 % solution of buffered formaldehyde. Because of low winter temperatures sardine eggs were recorded in low numbers at sampling area from September to April, with the spawning peaks in November and February. The highest number of eggs were recorded in the northwestern part of the Slovenian sea and in the Gulf of Koper. Anchovy eggs were recored from August to November 2014 and from May to July in 2015, with the spawning peak in August. Most important spawning areas are in the northwestern part of Slovenian sea and the Gulf of Koper. We measured the eggs and determin their egg stages.

Avtorji članka so sestavili 14 lokalnih kronologij širin branik bukve (Fagus sylvatica L.) z različnih rastišč v Sloveniji (nadmorske višine 300-1415 m). Podajajo osnovno statistiko za različne verzije kronologij (kronologije širin branik, ARSTAN standard, ARSTAN residual), vpliv klime na variabilnost širin branik in variabilnost med rastišči. Dendroklimatološke analize so pokazale, da imajo poletne (posebno junijske) temperature negativen, padavine pa pozitiven vpliv na širine branik na 11 raziskanih rastiščih iz osrednje, JV in JZ Slovenije. Širine branik bukev z zgornje gozdne meje v Julijskih Alpah nad Tolminom (nadmorska višina 1200-1450 m) kažejo pozitiven odziv na temperature v času vegetacijske dobe. Analiza osnovnih komponent je pokazala, da razlike med rastišči lahko pripišemo trem komponentam: (PC_1) odzivu na junijsko klimo, (PC_2) nadmorski višini in (PC_3) fitogeografski regiji. Fourteen local tree-ring chronologies of beech (Fagus sylvatica L.) from different sites in Slovenia, elevations 300-1,415 m a.s.l., were constructed. Basic statistics of the chronologies (raw, standard and residual), climatic influence on tree growth, and growth variability among the sites are presented in the article. Dendroclimatological analysis showed that summer (particularly June) temperatures have negative and precipitation positive effect on tree-ring widths of beech on eleven sites in central, SE and SW Slovenia. The beech from highly elevated site in the Julian Alps above Tolmin (elevation 1200-1,450 m) showed positive response to summer temperatures. The whole variability in studied beech chronologies can be resumed in three sources of variation (principal components - PC): (PC_1) response of trees to June climate, (PC_2) altitude, and (PC_3) biogeographical differences.

Opravili smo dendrokronološke in dendroklimatološke raziskave rasti bukve na izbranih rastiščih na Mašunu, v revirju Pivka Jama in v Jelševcu. Na Mašunu smo analizirali 24 dreves, v Jelševcu 27 in v Pivki Jami 8 dreves. Na vsaki lokaciji smo iz posekanih debel odvzeli kolute, jih posušili, iz vsakega koluta odvzeli po tri radialne vzorce, jih označili in površinsko obdelali. Sestavili smo zaporedja širin branik posameznih vzorcev, jih sinhronizirali indatirali. S pomočjo programov TSAP/x in ARSTAN smo sestavili surovo in indeksirane lokalne kronologije širin branik za vsako lokacijo. Kronologija sestoja na Mašunu je dolga 164 let (1844-2007), kronologija sestoja pri Pivki Jami meri 168 let (1840-2007), kronologija sestoja v Jelševcu pa 154 let (1854-2007). S programom DENDROCLIM 2002 smo analizirali zvezo med širino branik in klimatskimi dejavniki (povprečna mesečna temperatura, mesečna količina padavin). Izračunani korelacijski in odzivni koeficienti kažejo na statistično značilno in časovno stabilno pozitivno zvezo med količino padavin v mesecu juniju ter širino branik na vseh treh lokacijah. Zveza je najbolj poudarjena za sestoj pri Mokronogu, najmanj pa za sestoj na Snežniku. Junijskevisoke temperature na vseh treh lokacijah na širino branik vplivajo negativno. Na širino branik sestoja na Snežniku pozitivno vpliva tudi količinapadavin predhodnega avgusta. Dendrochronological and dendroclimatological surveys were performed on beech stands on Mašun, at Pivka Jama and in Jelševec. On Mašun 24 trees were analized, 8 trees were analized in Pivka Jama and 27 trees in Jelševec. At each site samples were collected by taking discs from felled trees. Three radial samples were taken from every disc. All samples were smoothed, ring-widths measured, cross-dated and dated. Raw and standardized local tree-ring chronologies were calculated for every site using TSAP/x and ARSTAN computer programmes. The length of the Mašun chronology was 164 years (1844-2007), of the Pivka Jama chronology 168 years (1840-2007) and of the Jelševec chronology 154 years (1954-2007). Relationship between ring-widths and climate data (average monthly temperatures, monthly sum of precipitation)was analized using DENDROCLIM 2002 programme. Correlation and response coefficients calculated show a statistically significant and stable relationship between June precipitation and ring-width at all three sites. Therelationship is the most pronounced at the Jelševec site and the least pronounced at the Mašun site. High temperatures in June have a significant negative impact on ring-width at all three sites. Ring widths on Mašun are also positively affected by precipitation in August of the previous year.