Taxonomic and chorologic revision of the Polypodium vulgare complex in Herbarium Croaticum and the Ivo and Marija Horvat Herbarium

Taxonomic and chorologic revision of specimens in the two largest public herbaria in Croatia was carried out on the basis of the most recent taxonomic treatment of the Polypodium vulgare L. complex. These data were used for the production of maps of the partial distribution of taxa from the Polypodium vulgare complex in Croatia

Rasprostranjenost roda Daphne u Parku Prirode Medvednica (Hrvatska)

In order to develop the floristic map of Medvednica Nature Park, already existing data on the distribution of the genus Daphne were collected from literature and herbarium sources. Field observations were also carried out. Three species were recorded: Daphne blagayana Freyer, Daphne laureola L. and Daphne mezereum L. All recorded species have the IUCN status of endangered or low risk species. For the three species of the genus Daphne in Medvednica Nature Park, 159 localities were found and 124 (78%) of the localities were geocoded. The distribution of the species is presented on maps using a Central European grid for floristic mapping (MTB).U svrhu izrade florističke karte Parka Prirode Medvednica sabrani su postojeći podaci o rasprostranjenosti roda Daphne iz literaturnih i herbarskih izvora. Također su izvršena i terenska istraživanja. Zabilježene su tri vrste: Daphne blagayana Freyer, Daphne laureola L. i Daphne mezereum L. Sve zabilježene vrste prema IUCN kategorijama spadaju među ugrožene i nisko rizične vrste. Za ove tri vrste roda Daphne unutar Parka Prirode Medvednica ukupno je zabilježeno 159 lokaliteta od kojih je 124 (78%) lokaliteta geokodirano. Rasprostranjenost vrsta prikazana je kartama uz uporabu srednjoeuropske mreže za kartiranje flore (MTB)

Rasprostranjenost roda Impatiens u Parku Prirode Medvednica, Hrvatska

The flora research in Medvednica Nature Park has shown the presence of four species of the genus Impatiens: Impatiens balfourii Hooker f., I. glandulifera Royle, I. noli-tangere L. and I. parviflora DC. The species I. noli-tangere is the most widespread in the Park, while the other three species are registered for the first time. Distribution mapping was done by using the basic units of the Central European grid for floristic mapping (MTB).Analizom rezultata dosadašnjih florističkih istraživanja, za područje Parka Prirode Medvednica utvrđene su četiri vrste roda Impatiens: Impatiens balfourii Hooker f., I. glandulifera Royle, I. noli-tangere L. and I. parviflora DC. Najšire rasprostranjena vrsta je I. noli-tangere, dok su ostale tri vrste prvi put zabilježene za floru Parka. Kartiranje rasprostranjenosti obavljeno je na temelju osnovnih jedinica srednjoeuropske mreže za kartiranje flore (MTB)

Season\u27s influence on the relationship between mass concentrations of sulphur dioxide and sulphate in the air

Studiran je odnos masenih koncentracija (p) sumpor-dioksida i sulfata u prirodnim uvjetima, tj. u dvije gradske sredine s različitim razinama atmosferskog onečišćenja tijekom zimskog i ljetnog razdoblja. Na svakom mjernom mjestu tijekom sezone sakupljeno je i analizirano pedesetak uzoraka sumpor-dioksida, dima·i lebdećih čestica. U uzorcima lebdećih čestica određivana je ukupna masena koncentracija lebdećih čestica, sulfata, kalcija, olova, željeza, mangana i bakra. Studirana je korelacija po sezonama između masenih koncentracija sulfata i sumpor-dioksida, lebdećih čestica, dima, te pojedinih komponenata lebdećih čestica. Dobivena je dobra korelacija između masenih koncentracija sulfata i lebdećih čestica. Razine masenih koncentracija sumpor-dioksida, dima, sulfata i lebdećih čestica značajno su više tijekom zimskog razdoblja u obim sredinama. Na obim je mjestima dobiven gotovo jednak prosječni maseni udjel (w) sulfata (oko 10) u lebdećim česticama i tijekom zimskog i ljetnog razdoblja. Izračunate jednadžbe regresije za odnos između sulfatnog S i ukupnog S (sulfati i sumpor-dioksid) za ljetno i zimsko razdoblje međusobno se razlikuju. Izgleda da se taj sezonski utjecaj na odnos masenih koncentracija sumpor-dioksida i sulfata može dovesti u vezu s različitim porijeklom i različitim razinama masenih koncentracija lebdećih čestica u zraku.The relationship between sulphur dioxide and sulphate was studied in natural conditions, in two urban areas with different levels of air pollution during the winter and summer periods. About fifty samples of sulphur dioxide, smoke and suspended particulates were collected and analysed on each measuring site during the season. In the sample of suspended particulates the total mass concentration of suspended particulates, sulphate, calcium, lead, iron, manganese and copper was determined. The correlation between sulphate and sulphur dioxide, suspended particulates, smoke and some suspended particulate\u27s components was studied by seasons. A good correlation was found between the concentration of sulphate and suspended particulates. The concentration levels of sulphur dioxide, smoke, sulphate and suspended particulates were significantly higher during the winter period in both areas. On both locations the average mass fraction of sulphate (about 10%) in suspended particulates was nearly the same during the winter and summer periods. The calculated equation regressions for the relationship between sulphate S and total S (sulphate and sulphur dioxide) for the summer and winter period are reciprocally different. It seems that the season\u27s influence on the relationship between sulphur dioxide and sulphate might be due to a different origin and different levels of suspended particulates in the air

Rasprostranjenost roda Daphne u Parku Prirode Medvednica (Hrvatska)

In order to develop the floristic map of Medvednica Nature Park, already existing data on the distribution of the genus Daphne were collected from literature and herbarium sources. Field observations were also carried out. Three species were recorded: Daphne blagayana Freyer, Daphne laureola L. and Daphne mezereum L. All recorded species have the IUCN status of endangered or low risk species. For the three species of the genus Daphne in Medvednica Nature Park, 159 localities were found and 124 (78%) of the localities were geocoded. The distribution of the species is presented on maps using a Central European grid for floristic mapping (MTB).U svrhu izrade florističke karte Parka Prirode Medvednica sabrani su postojeći podaci o rasprostranjenosti roda Daphne iz literaturnih i herbarskih izvora. Također su izvršena i terenska istraživanja. Zabilježene su tri vrste: Daphne blagayana Freyer, Daphne laureola L. i Daphne mezereum L. Sve zabilježene vrste prema IUCN kategorijama spadaju među ugrožene i nisko rizične vrste. Za ove tri vrste roda Daphne unutar Parka Prirode Medvednica ukupno je zabilježeno 159 lokaliteta od kojih je 124 (78%) lokaliteta geokodirano. Rasprostranjenost vrsta prikazana je kartama uz uporabu srednjoeuropske mreže za kartiranje flore (MTB)

Orchid diversity of the cape of Kamenjak (Istria, Croatia)

Twenty two taxa have been recorded in the south of Istrian peninsula (north Adriatic coast, Croatia). The research was performed in the period 2003–2004. A great majority of taxa belong to Euri- Mediterranean (seven taxa, 41.18%) and Steno-Mediterranean (six taxa, 35.29%) floral elements. Eurasiatic (two taxa, 11.76%), Atlantic (one taxa, 5.88%) and endemic (one taxon, 5.88%) plants were also present. Almost a half of recorded orchids are abundant or frequent. The most of taxa are endangered s.l.; nine vulnerable (VU) plants (52.94%), and one species endangered s.s. (EN) (5.88%). There are also near threatened (NT) (two taxa, 11.76%), and data deficient (DD) (one taxon, 5.88%) plants, while others have no category assigned (four taxa, 23.53%)

Season\u27s influence on the relationship between mass concentrations of sulphur dioxide and sulphate in the air

Studiran je odnos masenih koncentracija (p) sumpor-dioksida i sulfata u prirodnim uvjetima, tj. u dvije gradske sredine s različitim razinama atmosferskog onečišćenja tijekom zimskog i ljetnog razdoblja. Na svakom mjernom mjestu tijekom sezone sakupljeno je i analizirano pedesetak uzoraka sumpor-dioksida, dima·i lebdećih čestica. U uzorcima lebdećih čestica određivana je ukupna masena koncentracija lebdećih čestica, sulfata, kalcija, olova, željeza, mangana i bakra. Studirana je korelacija po sezonama između masenih koncentracija sulfata i sumpor-dioksida, lebdećih čestica, dima, te pojedinih komponenata lebdećih čestica. Dobivena je dobra korelacija između masenih koncentracija sulfata i lebdećih čestica. Razine masenih koncentracija sumpor-dioksida, dima, sulfata i lebdećih čestica značajno su više tijekom zimskog razdoblja u obim sredinama. Na obim je mjestima dobiven gotovo jednak prosječni maseni udjel (w) sulfata (oko 10) u lebdećim česticama i tijekom zimskog i ljetnog razdoblja. Izračunate jednadžbe regresije za odnos između sulfatnog S i ukupnog S (sulfati i sumpor-dioksid) za ljetno i zimsko razdoblje međusobno se razlikuju. Izgleda da se taj sezonski utjecaj na odnos masenih koncentracija sumpor-dioksida i sulfata može dovesti u vezu s različitim porijeklom i različitim razinama masenih koncentracija lebdećih čestica u zraku.The relationship between sulphur dioxide and sulphate was studied in natural conditions, in two urban areas with different levels of air pollution during the winter and summer periods. About fifty samples of sulphur dioxide, smoke and suspended particulates were collected and analysed on each measuring site during the season. In the sample of suspended particulates the total mass concentration of suspended particulates, sulphate, calcium, lead, iron, manganese and copper was determined. The correlation between sulphate and sulphur dioxide, suspended particulates, smoke and some suspended particulate\u27s components was studied by seasons. A good correlation was found between the concentration of sulphate and suspended particulates. The concentration levels of sulphur dioxide, smoke, sulphate and suspended particulates were significantly higher during the winter period in both areas. On both locations the average mass fraction of sulphate (about 10%) in suspended particulates was nearly the same during the winter and summer periods. The calculated equation regressions for the relationship between sulphate S and total S (sulphate and sulphur dioxide) for the summer and winter period are reciprocally different. It seems that the season\u27s influence on the relationship between sulphur dioxide and sulphate might be due to a different origin and different levels of suspended particulates in the air

Taxonomic and functional diversity of atrazine-degrading bacterial communities enriched from agrochemical factory soil

International audienceAims: To characterize atrazine-degrading potential of bacterial communities enriched from agrochemical factory soil by analysing diversity and organization of catabolic genes. Methods and Results: The bacterial communities enriched from three different sites of varying atrazine contamination mineralized 65–80% of 14C ring-labelled atrazine. The presence of trzN-atzBC-trzD, trzN-atzABC-trzD and trzN-atzABCDEF-trzD gene combinations was determined by PCR. In all enriched communities, trzN-atzBC genes were located on a 165-kb plasmid, while atzBC or atzC genes were located on separated plasmids. Quantitative PCR revealed that catabolic genes were present in up to 4% of the community. Restriction analysis of 16S rDNA clone libraries of the three enrichments revealed marked differences in microbial community structure and diversity. Sequencing of selected clones identified members belonging to Proteobacteria (α-, β- and γ-subclasses), the Actinobacteria, Bacteroidetes and TM7 division. Several 16S rRNA gene sequences were closely related to atrazine-degrading community members previously isolated from the same contaminated site. Conclusions: The enriched communities represent a complex and diverse bacterial associations displaying heterogeneity of catabolic genes and their functional redundancies at the first steps of the upper and lower atrazine-catabolic pathway. The presence of catabolic genes in small proportion suggests that only a subset of the community has the capacity to catabolize atrazine. Significance and Impact of the Study: This study provides insights into the genetic specificity and the repertoire of catabolic genes within bacterial communities originating from soils exposed to long-term contamination by s-triazine compounds

Where does Sedum cepaea L. (Crassulaceae) – one of the rarest species of Croatian flora – really grow?

The distribution of Sedum cepaea in Croatia is limited to sciophilous or slightly heliophilous forest habitats in the zone dominated by Quercus petraea, developed on acidic types of soil above siliceous bedrock.We confirm a finding spot on Moslavačka gora and describe new localities on Zrinska gora (central Croatia). Two S. cepaea populations on Nikolino brdo [hill] in Topusko disappeared a century ago