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Ryrholm, Nils
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Bergman, K.-O., Burman, J., Jonason, D., Larsson, M. C., Ryrholm, N., Westerberg, L. & Milberg, P. (2019). Clear-cuts are temporary habitats, not matrix, for endangered grassland burnet moths (Zygaena spp.). Journal of Insect Conservation
Open this publication in new window or tab >>Clear-cuts are temporary habitats, not matrix, for endangered grassland burnet moths (Zygaena spp.)
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2019 (English)In: Journal of Insect Conservation, ISSN 1366-638X, E-ISSN 1572-9753Article in journal (Refereed) Epub ahead of print
Abstract [en]

Burnet moths (Zygaena spp.) are day-flying Lepidoptera considered indicative of species-rich grasslands. In the present study, our aim was to clarify whether clear-cuts are habitat, supporting habitat or matrix for three species of Zygaena. We did so by sampling these species with sex pheromones on 48 clear-cuts, varying in amount of host and nectar plants, in southern Sweden. To compare the efficiency of such sampling, we also conducted transect walks on these clearcuts. Overall, host-plants on clear-cuts best explained the abundance of Zygaena spp. recorded, better than nectar-plants or connectivity with nearby grasslands. These results indicate that clear-cuts with an abundance of host plants are used as a fully functional habitat, and not a supporting habitat in the sense of only providing nectar. There is no support in these results for considering clear-cuts as an inert matrix. With about half the work-effort, pheromone traps recorded 100 times more Zygaena spp. as transect walks. The poor correspondence between observations during transects walks and pheromone trap catches suggest Zygaena spp. being difficult to monitor by transect walks. In contrast to grasslands, clear-cuts are short-term in nature requiring repeated recolonization, indicating the importance of permanent grasslands. However, clear-cuts are important temporary insect habitats due to their great acreage, and suitable management can increase the time they remain a habitat.

Keywords
Clear-cut, Day-flying moth, Forestry, Landscape, Zygaena
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-31173 (URN)10.1007/s10841-019-00193-3 (DOI)2-s2.0-85075365454 (Scopus ID)
Available from: 2019-12-03 Created: 2019-12-03 Last updated: 2019-12-03Bibliographically approved
Birkedal, S., Ryrholm, N., Hultengren, S. & Fritz, Ö. (2019). Dagfjärilar en fältguide. Naturcentrum AB
Open this publication in new window or tab >>Dagfjärilar en fältguide
2019 (Swedish)Book (Other academic)
Abstract [sv]

I denna nya fältguide till svenska dagfjärilar beskrivs drygt 180 arter, underarter, former och tillfälliga besökare. Boken är rikt illustrerad och fjärilarna åtföljs av fotografier på hane, hona och undersida jämte grafiska bilder över utbredningar och flygtider. Boken är den tredje i Naturcentrums serie om växter och djur i Sverige. Tidigare har "Lavar - en fältguide" och "Mossor en fältguide" utgivits.

Ett kort inledande avsnitt beskriver bokens tillkomst, hur den är uppbyggd, terminologi, litteratur samt lite om fjärilsskådning. Därefter följer bokens huvuddel som utgörs av artbeskrivningarna och ca 1.000 illustrationer ledsagar läsaren. Boken, som omfattar 200 sidor, är framtagen av Sven Birkedal, naturälskare och fotograf från Åhus. Fjärilsforskaren Nils Ryrholm har stått för kompletterade texter och beskrivningar, vetenskaplig granskning, utbredningskartor, flygtider, m. m.

Place, publisher, year, edition, pages
Naturcentrum AB, 2019
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30894 (URN)9789185221400 (ISBN)
Available from: 2019-11-06 Created: 2019-11-06 Last updated: 2019-11-06Bibliographically approved
Ryrholm, N., Larsson, M. C., Molander, M. A. & Eriksson, B. (2019). Hotade insekter medlockande dofter. Yrfän (2), 15-17
Open this publication in new window or tab >>Hotade insekter medlockande dofter
2019 (Swedish)In: Yrfän, ISSN 2002-1151, no 2, p. 15-17Article in journal (Other (popular science, discussion, etc.)) Published
Place, publisher, year, edition, pages
Sveriges Entomologiska Förening, 2019
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30893 (URN)
Available from: 2019-11-06 Created: 2019-11-06 Last updated: 2019-11-06Bibliographically approved
Maes, D., Verovnik, R., Wiemers, M., Brosens, D., Beshkov, S., Bonelli, S., . . . Warren, M. S. (2019). Integrating national Red Lists for prioritising conservation actions for European butterflies. Journal of Insect Conservation, 23(2), 301-330
Open this publication in new window or tab >>Integrating national Red Lists for prioritising conservation actions for European butterflies
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2019 (English)In: Journal of Insect Conservation, ISSN 1366-638X, E-ISSN 1572-9753, Vol. 23, no 2, p. 301-330Article in journal (Refereed) Published
Abstract [en]

Red Lists are very valuable tools in nature conservation at global, continental and (sub-) national scales. In an attempt to prioritise conservation actions for European butterflies, we compiled a database with species lists and Red Lists of all European countries, including the Macaronesian archipelagos (Azores, Madeira and Canary Islands). In total, we compiled national species lists for 42 countries and national Red Lists for 34 of these. The most species-rich countries in Europe are Italy, Russia and France with more than 250 species each. Endemic species are mainly found on the Macaronesian archipelagos and on the Mediterranean islands. By attributing numerical values proportionate to the threat statuses in the different national Red List categories, we calculated a mean Red List value for every country (cRLV) and a weighted Red List value for every species (wsRLV) using the square root of the country’s area as a weighting factor. Countries with the highest cRLV were industrialised (NW) European countries such as the Netherlands, Belgium, the Czech Republic and Denmark, whereas large Mediterranean countries such as Spain and Italy had the lowest cRLV. Species for which a Red List assessment was available in at least two European countries and with a relatively high wsRLV (≥ 50) are Colias myrmidone, Pseudochazara orestes, Tomares nogelii, Colias chrysotheme and Coenonympha oedippus. We compared these wsRLVs with the species statuses on the European Red List to identify possible mismatches. We discuss how this complementary method can help to prioritise butterfly conservation on the continental and/or the (sub-)national scale.

Keywords
Policy, Management, Threatened species, Habitats directive, IUCN, Biogeography, Lepidoptera
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30892 (URN)10.1007/s10841-019-00127-z (DOI)000468183100012 ()2-s2.0-85060223710 (Scopus ID)
Available from: 2019-11-06 Created: 2019-11-06 Last updated: 2019-11-27Bibliographically approved
Ehl, S., Holzhauer, S. I. J., Ryrholm, N. & Schmitt, T. (2019). Phenology, mobility and behaviour of the arcto-alpine species Boloria napaea in its arctic habitat. Scientific Reports, 9(1), Article ID 3912.
Open this publication in new window or tab >>Phenology, mobility and behaviour of the arcto-alpine species Boloria napaea in its arctic habitat
2019 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 9, no 1, article id 3912Article in journal (Refereed) Published
Abstract [en]

Arctic and alpine environments present extreme, but different, challenges to survival. We therefore studied the ecological adaptation of the arctic-alpine fritillary Boloria napaea in northern Sweden and compared these results with the eastern Alps. Using mark-release-recapture, we analysed phenology, mobility, activity patterns, change in wing condition and nectar sources. The phenology showed no protandry, but a longer flight period of the females. Wing conditions revealed a linear decay being quicker in males than females. The mean flight distances were higher for males than females (143 vs 92 m). In general, males were more flight active, while females invested more time in feeding and resting. The shortness of the flight period in the Arctic is apparently a particular adaptation to these harsh conditions, not even allowing protandry, and constraining all individuals to hatch during a short period. These conditions also forced the individuals to concentrate on flight and alimentation. In general, Arctic and Alpine populations of B. napaea show few differences, but the species seems to be even better adapted to the northern environments. Thus, the short temporal separation of these populations seems not to have been sufficient for a divergent adaptation in the southern mountains.

National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-30488 (URN)10.1038/s41598-019-40508-7 (DOI)000460508600142 ()30846780 (PubMedID)2-s2.0-85062641380 (Scopus ID)
Available from: 2019-08-12 Created: 2019-08-12 Last updated: 2019-08-12Bibliographically approved
Ryrholm, N., Johansson, N. & Shaw, M. (2017). The Swedish species of Cidaphus (Hymenoptera, Ichneumonidae, Mesochorinae), a new genus and three new species for Sweden. Entomologisk Tidskrift, 138(3-4), 203-208
Open this publication in new window or tab >>The Swedish species of Cidaphus (Hymenoptera, Ichneumonidae, Mesochorinae), a new genus and three new species for Sweden
2017 (English)In: Entomologisk Tidskrift, ISSN 0013-886X, Vol. 138, no 3-4, p. 203-208Article in journal (Refereed) Published
Abstract [en]

The ichneumonid genus Cidaphus Förster, 1869, and its three known European species Cidapus areolatus (Boie, 1850), C. alarius (Gravenhorst, 1829) and C. atricillus (Haliday, 1839) are reported as new to Sweden based primarily on specimens collected in light traps during projects monitoring nocturnal moths. The available material indicates that C. areolatus is a rather abundant and widespread species throughout most of the southern and central parts of Sweden. The trapping data indicates that it flies in one prolonged generation from July until October. Cidaphus atricillus and C. alarius are both rather rare and their distribution is much less clear, but both species appear to fly earlier in the season than C. areolatus.

Place, publisher, year, edition, pages
Uppsala: , 2017
Keywords
faunistic, Ichneumonidae, Mesochorinae, Cidaphus, parasitic wasp
National Category
Biological Systematics Zoology
Identifiers
urn:nbn:se:hig:diva-25886 (URN)
Available from: 2017-12-21 Created: 2017-12-21 Last updated: 2019-12-10Bibliographically approved
Burman, J., Westerberg, L., Ostrow, S., Ryrholm, N., Bergman, K.-O., Winde, I., . . . Milberg, P. (2016). Revealing hidden species distribution with pheromones: the case of Synanthedonvespiformis (Lepidoptera: Sesiidae) in Sweden. Journal of Insect Conservation, 20(1), 11-21
Open this publication in new window or tab >>Revealing hidden species distribution with pheromones: the case of Synanthedonvespiformis (Lepidoptera: Sesiidae) in Sweden
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2016 (English)In: Journal of Insect Conservation, ISSN 1366-638X, E-ISSN 1572-9753, Vol. 20, no 1, p. 11-21Article in journal (Refereed) Published
Abstract [en]

Synanthedonvespiformis L. (Lepidoptera: Sesiidae) is considered a rare insect in Sweden, discovered in 1860, with only a few observations recorded until a sex pheromone attractant became available recently. This study details a national survey conducted using pheromones as a sampling method for this species. Through pheromone trapping we captured 439 specimens in Southern Sweden at 77 sites, almost tripling the number of previously reported records for this species. The results suggest that S. vespiformis is truly a rare species with a genuinely scattered distribution, but can be locally abundant. Habitat analyses were conducted in order to test the relationship between habitat quality and the number of individuals caught. In Sweden, S. vespiformis is thought to be associated with oak hosts, but our attempts to predict its occurrence by the abundance of oaks yielded no significant relationships. We therefore suggest that sampling bias and limited knowledge on distribution may have led to the assumption that this species is primarily reliant on oaks in the northern part of its range, whereas it may in fact be polyphagous, similar to S. vespiformis found as an agricultural pest in Central and Southern Europe. We conclude that pheromones can massively enhance sampling potential for this and other rare lepidopteran species. Large-scale pheromone-based surveys provide a snapshot of true presences and absences across a considerable part of a species national distribution range, and thus for the first time provide a viable means of systematically assessing changes in distribution over time with high spatiotemporal resolution.

Keywords
Conservation, Ecology, Indicator of species richness, Monitoring, Moth, Saproxylic
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-20995 (URN)10.1007/s10841-015-9835-9 (DOI)000371086000002 ()2-s2.0-84958769592 (Scopus ID)
Note

Finansiärer:

Stiftelsen Eklandskapet i Linkopings kommun

Marie-Claire Cronstedts Stiftelse

Swedish WWF

Tranemala Foundation

Skogssällskapet

Region Skanes miljovardsfond

SLU Partnerskap Alnarp

IC-E3 Linnaeus grant (Formas, SLU)

Available from: 2016-01-11 Created: 2016-01-11 Last updated: 2018-03-13Bibliographically approved
Ahrné, K., Bengtsson, B. Å., Björklund, J.-O., Cederberg, B., Eliasson, C., Hydén, N., . . . Ryrholm, N. (2015). Rödlista över fjärilar Lepidoptera. In: Westling, Anna (Ed.), Rödlistade arter i Sverige 2015: (pp. 98-112). Uppsala: ArtDatabanken SLU
Open this publication in new window or tab >>Rödlista över fjärilar Lepidoptera
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2015 (Swedish)In: Rödlistade arter i Sverige 2015 / [ed] Westling, Anna, Uppsala: ArtDatabanken SLU , 2015, p. 98-112Chapter in book (Other academic)
Place, publisher, year, edition, pages
Uppsala: ArtDatabanken SLU, 2015
Keywords
biologisk mångfald, rödlista, rödlistade arter, hotade arter
National Category
Bioinformatics and Systems Biology Other Biological Topics
Identifiers
urn:nbn:se:hig:diva-20554 (URN)978-91-87853-10-4 (ISBN)
Available from: 2015-11-03 Created: 2015-11-03 Last updated: 2018-06-11Bibliographically approved
Ryrholm, N. (2014). The Violet Copper at its northern distribution range. In: Habel, Jan C, Meyer, Marc & Schmitt Thomas (Ed.), Jewels in the mist: A biological synopsis on the endangered butterfly Lycaena helle (pp. 15-21). Sofia: Pensoft Publishers
Open this publication in new window or tab >>The Violet Copper at its northern distribution range
2014 (English)In: Jewels in the mist: A biological synopsis on the endangered butterfly Lycaena helle / [ed] Habel, Jan C, Meyer, Marc & Schmitt Thomas, Sofia: Pensoft Publishers, 2014, p. 15-21Chapter in book (Refereed)
Place, publisher, year, edition, pages
Sofia: Pensoft Publishers, 2014
National Category
Biological Sciences
Identifiers
urn:nbn:se:hig:diva-12978 (URN)9789546427212 (ISBN)9546427217 (ISBN)
Available from: 2012-09-19 Created: 2012-09-19 Last updated: 2018-03-13Bibliographically approved
Hultengren, S., Bohman, P., Ryrholm, N. & Weibull, H. (2013). Inventeringar av kalkhällmarker i östra Dalsland. Länsstyrelsen i Västra Götalands län, Naturvårdsenheten
Open this publication in new window or tab >>Inventeringar av kalkhällmarker i östra Dalsland
2013 (Swedish)Report (Other academic)
Abstract [sv]

Naturcentrum AB har på uppdrag av Länsstyrelsen i Västra Götaland genomfört inventeringar av naturvårdsintressanta arter på kalkhällmarker i östra Dalsland. Inventeringen har fokuserat på särskilt intressanta arter t ex rödlistade arter, sällsynta arter m m, inom grupperna fjärilar, bin, lavar, mossor och marksvampar. Dessutom har presenteras spridda observationer inom andra grupper, till exempel tvåvingar och trollsländor.

De dalsländska kalkrika lerskifferhällmarkerna utgörs av någon mil breda, omvandlade berggrundsstråk i de mellersta och östra delarna av landskapet. Dessa kalkmarker skiljer sig från de geologiskt yngre och sedimentära kalkområdena som är typiska för till exempel Öland och Gotland. Förutsättningarna för floran och faunan i Dalslands kalkområden är unika genom det milda och fuktiga klimatet och att markke- min avviker något från de flesta andra kalkrika trakterna i Sverige. Dessa specifika förhållanden gynnar en lång rad sällsynta eller rödlistade arter.

Fyra av de besökta områdena ligger på Ryrhalvön norr om Köpmannebro och den femte vid Ånimskogs kyrka. Samtliga delområden utgörs av västvända branter i direkt anslutning till sjöarna Ånimmen och Östebosjön. Miljöerna är generellt öppna och det västvända läget skapar ett varmt och solexponerat mikroklimat. I anslutning till de kala hällarna finns partier med tunna, kalkhaltiga jordlager och grusmarker. Graden av beskogning varierar både inom och mellan de olika delområdena.

Inventeringarna genomfördes under några dagar under sommaren 2006 samt med en dags kompletterande lavinventering under februari 2008. Totalt på träffades 24 rödlistade arter fördelade enligt följande; sju fjärilsarter, två biarter, tre lavar, sex olika mossor och sex arter av svampar. Flera av dessa är ytterst sällsynta och har sin huvudsakliga utbredning i landet på dessa kalkrika lerskifferhällar. Vidare noterades ett 30-tal nya arter för landskapet Dalsland. Det största antalet nya fynd gjordes inom gruppen insekter vilket visar att kännedomen om landskapets insektsfauna är mycket bristfällig.

Klot-tegellaven Psora globifera är klassad som starkt hotad (EN) och har huvuddelen av sina kända före- komster i kalkrika områden i Dalsland. Arten växer på lättvittrade, solexponerade, kalklerskifferhällar. I delområde 3 förekommer arten rikligt och i delområde 4 något mera sparsamt. Klotsporig skifferlav Sarcogyne distinguenda (VU) är en annan mycket sällsynt lav med få kända lokaler i landet av vilken den ena utgörs av delområde 5 (Carlsson 1998). Arten är knuten till klippor av kalklerskiffer. Det stora antalet arter gelélavar Collema spp. (sju stycken) är anmärkningsvärt även om ingen av arterna är rödlistade. Av mos-sorna bör särskilt nämnas hår-rosettmossa Riccia ciliata (VU), dvärgrosettmossa Riccia warnstorfii (VU) och trubbklockmossa Encalypta mutica (NT) vilka alla är mer eller mindre knutna till kalkhällar eller kalkrika jordar. Rosettmossorna växer rikligt i delområde 1 medan trubbklockmossan, som omfattas av habitatdi-rektivet inom Natura 2000, noterades i delområde 5. Brun fingersvamp Clavaria pullei (EN) noterades på gräsmarkerna i delområde 5. Arten verkar vara knuten till öppna och hävdade kalkrika marker. Bland in-sekterna utgör nyponsandbiet Andrena nitida (VU), fibblesandbiet A. fulvago (NT) och jungfrulinpraktmal Hypercallia citrinalis (NT) några av de mest anmärkningsvärda arterna. Nyponsandbiet som noterades i del-område 1 är mycket sällsynt och observerades senast 1949 i Dalsland.

Inventeringarna som utförts är av stickprovskaraktär och det bedöms som sannolikt att fler värdefulla arter kan påträffas vid fördjupade inventeringar. Detta gäller både de behandlade delområdena och kalk-lerskiffermarker i allmänhet.

Place, publisher, year, edition, pages
Länsstyrelsen i Västra Götalands län, Naturvårdsenheten, 2013. p. 18
Series
Rapport / Länsstyrelsen Västra Götaland, ISSN 1403-168X ; 2013:20
Keywords
inventering, biologisk mångfald, rödlistade arter, hotade arter
National Category
Other Biological Topics
Identifiers
urn:nbn:se:hig:diva-20553 (URN)
Available from: 2015-11-03 Created: 2015-11-03 Last updated: 2018-06-11Bibliographically approved
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